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Chapter 5.4 Five Membered Ring Systems: With More Than One N Atom

K. Turnbull
Published 1999 · Chemistry

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Publisher Summary This chapter reviews improved synthetic routes for all of the relevant heterocycles, solid phase syntheses of imidazoles, pyrazoles and tetrazoles, and the intramolecular reactions of nitrilimines, en route to pyrazoles, triazoles, and tetrazoles. Ab initio MO calculations are performed for proton transfer in tetrazoles, with or without the assistance of bases, including imidazole for the ring closure reactions of diazomethane derivatives leading to pyrazoles or triazoles and to assess the degree of delocalization in all of the five-membered nitrogen heteroaromatic compounds. The affinity of imidazole and pyrazole containing cavitands for alkali metal, ammonium, and alkylammonium picrates is examined in the chapter. New N-hydroxytriazoles and-tetrazoles are evaluated in the chapter as catalysts for peptide synthesis. N-Arylated imidazoles and pyrazoles result from treatment of the parent heterocycles with arylboronic acids, while chiral imidazolyl and pyrazolyl alcohols can be prepared by microwave-assisted ring opening of (R)-styrene epoxide with imidazole or pyrazole.
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SYNTHESIS AND ANTIBACTERIAL ACTIVITY OF NEW, NON-NATURAL 1BETA -METHYLCARBAPENEM BEARING A SIGMA -SYMMETRIC BICYCLOPYRAZOLIUMTHIO GROUP AS THE PENDANT MOIETY
Y. Nagao (1998)
10.1055/S-1998-2195
Stereoselective Diazoalkane Cycloadditions to Chiral 5-Alkylidene-1,3-dioxan-4-ones and 3-Benzylidene-β-lactones
A. Bartels (1998)
10.1021/JO971725X
Application of Natural Bond Orbital Analysis and Natural Resonance Theory to Delocalization and Aromaticity in Five-Membered Heteroaromatic Compounds.
G. P. Bean (1998)
10.1021/JO970815Z
Chelation-Controlled Regioselectivity in the Synthesis of Substituted Pyrazolylpyridine Ligands. 3. Unsymmetrically Substituted Tridentates and Ditopic Bis(tridentates) en Route to Singly Stranded Helicates†
Jerzy Zadykowicz (1998)
10.1016/S0040-4020(97)00225-1
Solid phase synthesis of guanidines
S. Robinson (1997)
10.1021/JO961397L
Novel Syntheses of alpha,beta-Unsaturated Esters, alpha,beta-Unsaturated gamma-Lactones, and 2-Alkoxypyrroles via 1,2,4-Triazole-Stabilized Allenic Anions.
A. Katritzky (1997)
10.3987/COM-96-7671
PHASE TRANSFER CATALYZED C- VS O- ALKYLATION OF 3-METHYL-1-PHENYL-2-PYRAZOLIN-5-ONE IN THE ABSENCE OR PRESENCE OF CARBON DISULPHIDE
H. H. Hassan (1997)
10.1021/JO961761G
Versatile Acylation of N-Nucleophiles Using a New Polymer-Supported 1-Hydroxybenzotriazole Derivative.
I. Pop (1997)
10.1016/S0040-4039(97)01273-2
Palladium catalyzed amination of 2-chloro-1,3-azole derivatives: Mild entry to potent H1- antihistaminic norastemizole
Yaping Hong (1997)
10.1021/JO971987Z
Palau'amine and Its Congeners: A Family of Bioactive Bisguanidines from the Marine Sponge Stylotella aurantium1
R. Kinnel (1998)
10.1021/JO970521D
Base-Promoted Solid-Phase Synthesis of Substituted Hydantoins and Thiohydantoins
Jay M. Matthews (1997)
10.1080/00397919808007174
Solid State Acetylation with Acetylimidazole: Selective Protection of Primary Alcohols and Phenols
H. Hagiwara (1998)
10.1055/S-1998-6095
A MILD ONE-POT SYNTHESIS OF THIENO3,4-CPYRAZOLES AND THEIR CONVERSION INTOPYRAZOLE ANALOGS OF O-QUINODIMETHANE
P. G. Baraldi (1998)
10.1021/JO9717548
A CONVENIENT NEW SYNTHESIS OF 1-CYANOBENZOTRIAZOLE AND ITS USE AS A C-CYANATING REAGENT
T. V. Hughes (1998)
10.1021/JO9718410
DIRECTED ORTHO METALATION AND FACILE ANIONIC REARRANGEMENT OF 5-(ARYLOXY)-1-PHENYLTETRAZOLES
J. Dankwardt (1998)
10.1016/S0040-4020(97)00939-3
Polyfunctionalisation of imidazole via sequential imidazolyl anion formation
D. S. Carver (1997)
10.1021/JO9624197
First General Synthesis of (p-Nitroaryl)diarylmethanes via Vicarious Nucleophilic Substitution of Hydrogen
A. R. Katritzky (1997)
10.1016/S0040-4020(97)00678-9
STRUCTURE AND TAUTOMERISM OF 3(5)-AMINO-5(3)-ARYLPYRAZOLES IN THE SOLID STATE AND IN SOLUTION : AN X-RAY AND NMR STUDY
Jairo Quiroga Puello (1997)
10.1021/JO962291T
A Novel Transformation of Esters to Alkynes with 1-Substituted Benzotriazoles
A. R. Katritzky (1997)
10.1016/S0040-4039(97)00985-4
Regiospecifically multifunctional β-cyclodextrins with two or three glucose residues bearing imidazolyl groups at the C3 positions
Wen‐Hua Chen (1997)
10.1070/RC1997V066N03ABEH000325
Imidazo[1,2-a]pyrazines
V. A. Basiuk (1997)
10.1016/S0040-4020(96)01127-1
A methylene bridge as protecting group. 1. Selective preparation of 4-alkyl-1,2,4-triazoles
E. Díez-Barra (1997)
10.1016/S0022-328X(96)06494-7
An efficient preparation of macrocycles containing two tetra-coordinate phosphorus atoms
P. Molina (1997)
10.1021/JO961789S
Didemnimides A−D: Novel, Predator-Deterrent Alkaloids from the Caribbean Mangrove Ascidian Didemnum conchyliatum
Hélène C. Vervoort (1997)
10.1016/S0040-4039(98)01776-6
A convenient one-pot synthesis of 4-amino-3-arylpyrazoles from α-phthaloylaminoacetophenones
C. Chen (1998)
10.1021/JO9814952
SYNTHESES OF (TRIFLUOROMETHYL)IMIDAZOLES WITH ADDITIONAL ELECTRONEGATIVE SUBSTITUENTS. AN APPROACH TO RECEPTOR-ACTIVATED AFFINITY LABELS
Y. Hayakawa (1998)
10.1021/JA9732385
Solid-State Deuterium NMR of Imidazole Ligands in Cytochrome c Peroxidase
K. Liu (1998)
10.1080/00397919808007016
α-Amidoalkylation Reactions and Oxidation of Adducts of Benzimidazoles and Acyl Chlorides
A. P. Venkov (1998)
10.1016/S0040-4020(98)00312-3
Annulation of imidazolines with bis-electrophiles: Synthesis of imidazo[1,2-a]pyridines
R. Jones (1998)
10.1021/JO971630V
Synthesis of β-Alkoxy Ketones and α‘-Functionalized β-Alkoxy Ketones Utilizing Benzotriazole-Stabilized Acyl Anion Synthons
A. R. Katritzky (1998)
10.1080/00397919808004841
Reaction of 4-Bromo-2-methyl-5-nitro-1-phenacylimidazole Derivatives with Morpholine, Pyrrolidine and Piperidine
Stanisław Sobiak (1998)
10.1002/JHET.5570350301
Synthesis of pyrazoles
K. Makino (1998)
10.1039/A803251C
Directed deprotonation of 7-methyl-1-aminobenzotriazole: an approach to ortho-substituted benzyne precursors
M. Birkett (1998)
10.1039/A804086I
1,2-Proton shifts in pyrazole and related systems: a computational study of [1,5]-sigmatropic migrations of hydrogen and related phenomena†
I. Alkorta (1998)
10.1016/S0040-4020(98)00068-4
Synthesis of ring-halogenated histidines and histamines
R. Jain (1998)
10.1016/S0040-4039(98)02111-X
NOVEL APPLICATIONS OF ALKYL FLUORIDES IN ORGANIC SYNTHESIS : VERSATILE NITROGEN PROTECTING GROUPS
G. Theodoridis (1998)
10.1016/S0040-4039(98)00504-8
New aryl/heteroaryl CN bond cross-coupling reactions via arylboronic acid/cupric acetate arylation
Patrick Y. S. Lam (1998)
10.1016/S0957-4166(98)00202-X
Stereoselective synthesis of 2-(α-hydroxyalkyl)benzimidazoles
A. R. Katritzky (1998)
10.1016/S0040-4039(97)00554-6
Moisture Stable Dialkylimidazolium Salts as Heterogeneous and Homogeneous Lewis Acids in the Diels-Alder Reaction
J. Howarth (1997)
10.1021/JO961597X
Benzotriazole-Assisted Aromatic Ring Annulation: Efficient and General Syntheses of Polysubstituted Naphthalenes and Phenanthrenes.
A. Katritzky (1997)
10.1016/S0040-4039(97)00986-6
Solid phase synthesis of hydantoin library using a novel cyclization and traceless cleavage step
S. Kim (1997)
10.1021/JO980286E
A New Simple One-Pot Regioselective Preparation of Mixed Diesters of Carbonic Acid.
G. Bertolini (1998)
10.1021/JO981252+
A Convenient and Highly Regioselective One-Pot Synthesis of Quinolines by Addition of a Vilsmeier-Type Reagent to N-Arylimines
A. R. Katritzky (1998)
10.1016/S0040-4020(98)83021-4
Synthesis of bis-(3,5)pyrazolophanes by sequential intermolecular-intramolecular nitrilimine cycloadditions
G. Broggini (1998)
10.1016/S0040-4039(98)01874-7
Efficient solid phase synthesis of 3,5-disubstituted hydantoins
A. Nefzi (1998)
10.1016/S0040-4039(97)10518-4
Solid phase synthesis of benzimidazolones
G. Wei (1998)
10.1016/S0957-4166(98)00402-9
PTC and organic bases–LiCl assisted alkylation of imidazolidinone–glycine iminic derivatives for the asymmetric synthesis of α-amino acids
G. Guillena (1998)
10.1016/S0040-4020(98)00101-X
Isoquinolinium N-arylimides and electrophilic ethylenes: Structures and NMR spectra of cycloadducts ☆
H. Huber (1998)
10.1135/CCCC19980599
Michael Additions of Benzotriazole-Stabilized Carbanions. A Review
A. Katritzky (1998)
10.1016/S0040-4039(98)01158-7
Solid-phase synthesis of 3-amino-2-pyrazolines
Lars O. Lungsø (1998)
10.1080/00397919708004139
Synthesis of Aldehydes from Carboxylic Acids via 2-Imidazolines
Z. Shi (1997)
10.1139/V98-001
Novel syntheses of 4-alkyl-2(5H)-thiophenones and 8-phenylimino-1,2,4-triazolo[5,1-c]- 1,4-thiazines
A. R. Katritzky (1998)
10.1016/S0040-4020(97)00851-X
Synthesis of novel quinazoline-based antifolates with modified glutamate side chains as potential inhibitors of thymidylate synthase and antitumour agents
V. Bavetsias (1997)
10.1016/S0040-4039(97)01512-8
Organometallic-type reactions in aqueous media mediated by indium. Allylation of acyloyl-imidazoles and pyrazoles. Regioselective synthesis of β,γ-unsaturated ketones
Vernal J. Bryan (1997)
10.3987/COM-98-8180
Synthesis, H-1 and C-13 NMR spectra, and configurational assignment of furfurylideneimidazolinones
P. Schuisky (1998)
10.1139/CJC-76-5-522
Bisthiosemicarbazones of 2,4-pentanedione are pyrazolines
D. Hunter (1998)
10.1016/S0040-4020(97)00487-0
Synthesis, acidity and 19F NMR characteristics of imidazoles bearing 1-fluorinated substituents with potential application as probes for intracellular pH determination
J. Harper (1997)
10.1080/00397919708004110
Novel Route to Functionalized Indans via Formal [3 + 2] Cycloadditions of 1-Benzylbenzotriazoles with Alkenes
A. Katritzky (1997)
10.1016/S0040-4020(96)01108-8
Reactions of arylazosulfones with the conjugate bases of (tert-butoxycarbonyl)methyl and tosylmethyl isocyanide. Synthesis of substituted 1-arylimidazoles
C. Dell'erba (1997)
10.1039/A704358I
Synthesis, spectroscopic studies and structural characterisation of some new 2-(phosphonioaryl)imidazolide betaines
D. Allen (1998)
10.1139/V97-109
Preparation and bioactivity of pyrazole derivatives as potential cross-linking agent
H. Katayama (1997)
10.1016/S0040-4039(97)00559-5
1-Aza-1′,3′-Diaza-3,3′-Sigmatropic Rearrangements — A Convenient Synthesis of Benzimidazole Derivatives
M. Teresa (1997)
10.1021/JO960957D
Diastereoselective Synthesis of Cycloalkylamines by Samarium Diiodide-Promoted Cyclizations of α-Amino Radicals Derived from α-Benzotriazolylalkenylamines
J. Aurrecoechea (1997)
10.1016/S0040-4039(96)02372-6
Enantioselective methylation of the lithium enolate of 1-tetralone mediated by chiral C2-symmetric DMEU derivatives
K. Ishii (1997)
10.1016/S0040-4039(97)00052-X
A novel approach for the synthesis of 5-substituted tetrazole derivatives from primary amides in mild one-step method
A. El-Ahl (1997)
10.1021/JA982269C
Novel η3-Allylpalladium−Pyridinylpyrazole Complex: Synthesis, Reactivity, and Catalytic Activity for Cyclopropanation of Ketene Silyl Acetal with Allylic Acetates
and Akiharu Satake (1998)
10.1016/S0040-4039(98)00937-X
A new strategy for the synthesis of chromans and chromenes
D. Knight (1998)
10.3987/COM-97-8054
UNSYMMETRICALLY S-SUBSTITUTED KETENE DITHIOACETALS
A. R. Katritzky (1998)
10.1016/S0040-4039(98)00617-0
Alkynylbenzotriazoles by direct alkynylation of benzotriazole using alkynyliodonium salts
T. Kitamura (1998)
10.1002/JHET.5570350419
SYNTHESIS OF HYDROXY-SUBSTITUTED AZA-ANALOGUES OF ANTITUMOR ANTHRAPYRAZOLES
A. Krapcho (1998)
10.1055/S-1998-2201
Preparation of 5-Acyl- and 5-Aryl-Substituted 1-(Benzyloxy)pyrazoles via Directed Ortho-Lithiation/Transmetalation and Palladium Catalyzed Cross-Coupling
J. Kristensen (1998)
10.1002/JHET.5570350330
V-TRIAZOLINES. XXXIX. 1,2,4-TRIARYL-3-AMINOPYRROLES. UNUSUAL REACTION PRODUCTS IN THE PYROLYSIS OF 5-AMINO-V-TRIAZOLINES AND THE CRYSTAL STRUCTURE OF 2-(3-MORPHOLIN-4-YL-2,4-PYRROL-1-YL)BENZONITRILE
D. Pocar (1998)
10.1021/JO980219K
The Reaction of Buckminsterfullerene with Diazotetrazole. Synthesis, Isolation, and Characterization of (C60)2C2
Taiya S. Fabre (1998)
10.3987/COM-97-7776
The reaction of tetrazolylimines with Grignard reagents
S. Yoo (1997)
10.1021/JO971234C
Palladium-Catalyzed Cross-Coupling Syntheses of Benzotriazolyl Enynes and a General Route to Enynyl Ketones and Alkynyl Ketones.
A. Katritzky (1997)
10.1021/JO970898J
Regiocontrolled Iodoaminocyclization Reaction of an Ambident Nucleophile Mediated by Basic Metallic Reagent.
M. Fujita (1997)
10.1021/JO981163X
Preparation of Benzylic α,α-Difluoronitriles, -tetrazoles, and -sulfonates via Electrophilic Fluorination
C. C. Kotoris (1998)
10.1016/S0040-4039(97)10457-9
The Tetrazolylmethyl and Related Radicals: A Convenient Access to Tetrazoles and Other Heterocyclic Derivatives
Thibaud Biadatti (1998)
10.1016/S0040-4039(98)00009-4
The synthesis of 2-imldazolidones on solid support by tandem aminoacylation/Michael addition
D. Goff (1998)
10.1080/00397919809458692
Novel Synthetic Method for Symmetric Diketones from Benzimidazolium Salts & Bis-Grignard Reagents
Ju-Li Jiang (1998)
10.1021/JO981145F
Directed ortho-Lithiation on Solid Phase.
Sophie Havez (1998)
10.1021/JO9800659
SELECTIVE REACTIVITY OF SP3 AND SP2 CARBANIONS OF 1-SUBSTITUTED 1,2,4-TRIAZOLES. A COMPARATIVE APPROACH
A. Katritzky (1998)
10.1016/S0040-4039(98)00207-X
Diastereoselective ene reactions of triazolinediones with chiral allylic alcohols. Evidence for a hydroxyl-enophile steering effect
M. Stratakis (1998)
10.1039/A806025H
ν-Triazolines. Part 40.1 Thermal and photochemical transformations of 1-biaryl-5-amino-4,5-dihydro-ν-triazoles: a new synthetic approach to 6-alkylphenanthridines and aza-analogs
E. Erba (1998)
10.1016/S0040-4039(98)02194-7
Isocyanates Part 5. Synthesis of chiral oxazolidin-2-ones and imidazolidin-2-ones via DMAP-catalyzed isocyanation of amines with di-tert-butyl dicarbonate
H. Knölker (1998)
10.1016/S0040-4039(97)10128-9
1-[2′-(trimethylsilyl)ethoxymethyl]-2-phenylsulfonylimidazole: A new reagent for the preparation of C-4 substituted imidazoles
J. Phillips (1997)
10.1021/JO981607P
Granulatimide and Isogranulatimide, Aromatic Alkaloids with G2 Checkpoint Inhibition Activity Isolated from the Brazilian Ascidian Didemnum granulatum: Structure Elucidation and Synthesis†
R. G. Berlinck (1998)
10.1002/JHET.5570350224
Preparation of tetrazoles from organic nitriles and sodium azide in micellar media
B. S. Jursic (1998)
10.1021/JO971576I
Azidoazomethine−Tetrazole Isomerism in Solution: A Thermochemical Study
E. Cubero (1998)
10.1021/JO962246L
Transformations of N-Substituted Benzotriazoles into the Corresponding Carbanions by C−Benzotriazole Bond Scission‡
A. R. Katritzky (1997)
10.1139/V97-085
Synthesis of 1-N-hydroxyhydantoin 5-phosphates as potential fungicides
S. Hanessian (1997)
10.1016/S0040-4039(96)02429-X
1,2-Asymmetric induction in a new tandem of (3,3)-sigmatropic rearrangement of allylic thiocyanates and intramolecular amine addition to NCS group
M. Martinková (1997)
10.1016/S0040-4020(97)00098-7
SYNTHESIS AND PHOTOCHEMICAL DECOMPOSITION OF PYRAZOLINES FROM HOMOCHIRAL AMINO PENTENOATES. A LASER FLASH-PHOTOLYSIS STUDY
J. Jiménez (1997)
10.1016/S0040-4039(97)00070-1
A stereospecific synthesis of both enantiomers of 2-(1′-amino-2′-methylpropyl) imidazole, a key synthon in the synthesis of SB 203386; a potent protease inhibitor
L. N. Pridgen (1997)
10.1139/V98-085
Phenanthroimidazole dimers: structure and free radical reactivity; piezochromism, thermochromism, and photochromism
Yuehui Zhou (1998)
10.1002/JHET.5570350303
Conjugate addition of grignard reagents to N-(α,β-unsaturated)acylpyrazoles. Diastereoselective β-alkylation using 3-phenyl-l-menthopyrazole
Choji Kashima (1998)
10.1016/S0040-4039(98)02032-2
A concise synthesis of (−)-mesembrine
P. Dalko (1998)
10.1246/BCSJ.71.2701
Syntheses of Tungsten Diazoalkane Complexes from a Dinitrogen Complex and Diketones. Conversion of Molecular Nitrogen into Pyrazoles via the Diazoalkane Complexes as Intermediates
Yuji Harada (1998)
10.1016/S0040-4039(97)10825-5
Reactions of pyrazolium salts with silyllithium reagents. Regioselective synthesis of 5-silylated 3-pyrazolines
P. Cuadrado (1998)
10.1055/S-1998-2081
Novel Synthesis of 5-Substituted Tetrazoles from Nitriles.
K. Koguro (1998)
10.1080/00397919808004966
Synthesis of Substituted Imidazo[4,5-b]pyridines as Analogues of the DNA Binding Fluorochrome Hoechst 33258
Ashutosh Kumar Singh (1998)
10.1002/(SICI)1521-3773(19980904)37:16<2234::AID-ANIE2234>3.0.CO;2-R
A New Heterocyclic Multicomponent Reaction For the Combinatorial Synthesis of Fused 3-Aminoimidazoles.
H. Bienaymé (1998)
10.1021/JA970647S
Detection of Phenyl-Substituted Radical Cations Derived from Cyclopentyl- and Urazole-Type Azoalkanes by Pulse Radiolysis: Influence of Heteroatom Substitution on the Radical Cation Reactivities
W. Adam (1997)
10.1080/00397919708007296
Mercuric Acetate in Organic Synthesis: A Simple Procedure for the Synthesis of Pyrazolines1
K. Rai (1997)
10.1021/JO971304F
A New Regioselective Synthesis of 1,2,5-Trisubstituted 1H-Imidazoles and Its Application to the Development of Eprosartan.
S. Shilcrat (1997)
10.1021/JA982153G
Determination of Protonation and Deprotonation Forms and Tautomeric States of Histidine Residues in Large Proteins Using Nitrogen−Carbon J Couplings in Imidazole Ring
N. Shimba (1998)
10.1039/A707079I
Syntheses of C- and N-nucleosides from 1-aza-2-azoniaallene and 1,3-diaza-2-azoniaallene salts
N. Al-Masoudi (1998)
10.1016/S0040-4020(97)00452-3
Synthèse de métabolites marins 2-aminoimidazoliques: Hyménidine, oroïdine et kéramadine
S. Daninos-Zeghal (1997)
10.1016/S0040-4039(97)00668-0
Synthesis of polycarpine, a cytotoxic sulfur-containing alkaloid from the ascidian Polycarpa aurata, and related compounds
O. Radchenko (1997)
10.1016/S0040-4020(97)00213-5
A STRAIGHTFORWARD ROUTE TO HYDANTOCIDIN ANALOGUES WITH PYRANOSE RING STRUCTURE
E. Ősz (1997)
10.1002/HLCA.19970800108
Lanthanide Complexes of Polyacid Ligands derived from 2, 6‐bis(pyrazol‐1‐yl)pyridine, pyrazine, and 6, 6′‐bis(pyrazol‐1‐yl)‐2, 2′‐bipyridine: Synthesis and luminescence properties
J. C. Rodríguez-Ubis (1997)
10.1016/S0040-4020(96)00982-9
Efficient synthesis of peptaibol using a chloroimidazolidium coupling reagent, CIP
K. Akaji (1997)
10.1016/S0040-4039(98)00472-9
A general, [1+4] approach to the synthesis of 3(5)-substituted pyrazoles from aldehydes
N. Almirante (1998)
10.1016/S0040-4020(98)00579-1
Unambiguous synthesis of 1-methyl-3-hydroxypyrazoles
Diane Zimmermann (1998)
10.1021/CR941170V
Properties and Synthetic Utility of N-Substituted Benzotriazoles.
A. Katritzky (1998)
10.1039/A708872H
Rearrangement of substituted azido-1,2,3-triazolides to (α-diazoalkyl)tetrazolides
L. Preu (1998)
10.1016/S0040-4020(98)00947-8
New facile alkoxycarbonylating agent, alkyl pyrazole-1-carboxylates. The preparation and the utilities
C. Kashima (1998)
10.1021/JO980289R
Stereoselective Synthesis of Quaternary Benzylic Carbons Using C2 Symmetric Imidazolines and Tetrahydrofuran as Electrophile
P. Dalko (1998)
10.1016/S0040-4020(98)00832-1
Nucleosides and nucleotides 179. Ring-expanded purine nucleosides. The synthesis and cytotoxicity of imidazo[4,5-c]azepine nucleosides
N. Minakawa (1998)
10.1016/S0040-4039(98)02070-X
Novel organic ionic liquids (OILs) incorporating cations derived from the antifungal drug miconazole
J. Davis (1998)
10.1055/S-1998-2176
N, N'-BISACYLIMIDAZOLIDINES FROM 1,2-DIAMINES
I. Coldham (1998)
10.1002/JHET.5570340525
A selective synthesis of 2-arylamino-4H-1,3,4-thiadiazino[5,6-b]-quinoxalines and mesoionic triazolo[4,3-a]quinoxaline
H. Kim (1997)
10.1016/S0957-4166(98)00113-X
(4R,5S)-1,5-Dimethyl-4-phenylimidazolidin-2-one as a chiral auxiliary for the diastereoselective alkylation of a new iminic glycine derivative: practical asymmetric synthesis of α-amino acids
G. Guillena (1998)
10.1002/(SICI)1099-0690(199811)1998:11<2667::AID-EJOC2667>3.0.CO;2-R
Synthesis of Chiral 4‐(ω‐Hydroxyalkyl)pyrazolidin‐3‐ones by Ring‐Chain Transformation of α‐Alkylidenelactones with Hydrazines
Andreas Otto (1998)
10.1002/JHET.5570350133
(E)-1-benzotriazolyl-3-(phenylsulphonyl)-1-propene and its alkylation reactions
A. Katritzky (1998)
10.1021/JA971708P
Asymmetric Dipolar Cycloadditions of Me3SiCHN2. Synthesis of a Novel Class of Amino Acids: Azaprolines
M. Mish (1997)
10.3987/COM-97-7856
SYNTHESES OF 5-ARYLPYRAZOLE DERIVATIVES VIA PALLADIUM-CATALYZED CROSS-COUPLING REACTIONS
K. Arai (1997)
10.1021/JO962247D
N -(a-Aminoalkyl)benzotriazoles: Novel Nonstabilized a-Aminocarbanion Synthons
A. Katritzky (1997)
10.1021/JO970197M
Synthesis of 2-Amino-1,2,3-triazole Derivatives from Vicinal Diazides
Duoli Sun (1997)
10.1016/S0040-4020(97)00005-7
The synthesis of imidazoline analogs of the kainoid family
H. Baumgartner (1997)
10.1039/A803999B
Room temperature ionic liquids as novel media for ‘clean’ liquid–liquid extraction
J. Huddleston (1998)
10.1016/S0040-4039(97)10052-1
Oxidative radical cyclisations onto imidazoles and pyrroles using Bu3SnH
F. Aldabbagh (1997)
10.1246/CL.1998.887
Synthesis, Structure, Tautomerism, and 1,4-Dipolar Cycloaddition of Thermally Stable, Crystalline 1,4-Dipoles
J. Nakayama (1998)
10.1016/S0957-4166(98)00275-4
An efficient and general enantioselective synthesis of some isoxazole-containing analogues of the neuroexcitant glutamic acid
Hassan Pajouhesh (1998)
10.1080/00304949809355292
BORANE-(N-SUBSTITUTED)BENZOTRIAZOLE COMPLEXES AND THEIR ALKYLATION REACTIONS
A. R. Katritzky (1998)
10.1016/S0040-4039(98)00175-0
Rationalising diastereoselection in the dynamic kinetic resolution of α-haloacyl imidazolidinones
S. Caddick (1998)
10.1002/HLCA.19980810520
Synthesis of 1‐(1H‐Imidazol‐2‐yl)ethane‐1,2‐diol Derivatives: A novel class of protein kinase C inhibitors
A. Röhrle (1998)
10.1039/A807067I
Solution and soluble polymer syntheses of 3-aminoimidazoline-2,4-diones
Juyoung Yoon (1998)
10.1070/RC1998V067N08ABEH000392
RADIOLYSIS OF SOLUTIONS OF TETRAZOLIUM SALTS
A. K. Pikaev (1998)
10.1021/JO9718298
Synthesis of Marine Sponge Alkaloids Oroidin, Clathrodin, and Dispacamides. Preparation and Transformation of 2-Amino-4,5-dialkoxy-4,5-dihydroimidazolines from 2-Aminoimidazoles
Anne Olofson (1998)
10.1016/S0040-4039(98)00631-5
A new and efficient route to the synthesis of pyrazole and pyrimidine C-nucleoside derivatives
A. C. Veronese (1998)
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A Facile and Convenient Synthesis of 9-Methyl-3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-one Potassium
A. Sano (1998)
10.1016/S0040-4039(97)10436-1
SOLID PHASE SYNTHESIS OF 5-AMINOPYRAZOLES AND DERIVATIVES
S. Watson (1997)
10.1080/00397919708003333
Gallium Mediated Allylation and Propargylation of 1-(α-Aminoalkyl)benzotriazole: An Alternative Route to Homoallylic and Homopropargyl Amines
W. Bao (1997)
10.1002/(SICI)1521-3773(19981002)37:18<2490::AID-ANIE2490>3.0.CO;2-X
A Novel Class of Ruthenium Catalysts for Olefin Metathesis.
Thomas Weskamp (1998)
10.1016/S0040-4039(98)01494-4
A mild and effective iodination method using iodine in the presence of bis-(trifluoroacetoxy)iodobenzene
R. Benhida (1998)
10.1039/A705654K
Photochemical synthesis of 4(5)-nitro-2-arylimidazoles
M. D'auria (1998)
10.1021/JO962245T
A General Synthesis of Unsymmetrical Tetrasubstituted Ureas
A. R. Katritzky (1997)
10.1021/JO9619746
Synthesis of C(11)N(5) Marine Sponge Alkaloids: (+/-)-Hymenin, Stevensine, Hymenialdisine, and Debromohymenialdisine.
Ying-zi Xu Yz (1997)
10.1021/JO971389K
SYNTHESES OF DIALKYL AND FUNCTIONALIZED KETONES VIA 1-(BENZOTRIAZOL-1-YL)ALKYL METHYL THIOETHERS
A. R. Katritzky (1998)
10.1016/S0040-4039(98)00283-4
SYNTHESIS OF RIGID HYDROPHOBIC TETRAZOLES USING AN UGI MULTI-COMPONENT HETEROCYCLIC CONDENSATION
H. Bienaymé (1998)
10.1016/S0040-4020(97)00887-9
Synthesis of silicon-containing α-amino acids and hydantoins
R. Smith (1997)
10.1016/S0022-328X(98)00522-1
Formation of isocyanide complexes via acylation of diaminocarbene complexes
†. J. Cho (1998)
10.1021/JO980248V
A One-Pot Synthesis of 1-(2,2,6,6-tetramethyl-4-piperidinyl)-4- (4-fluorophenyl)-5-(2-amino-4-pyrimidinyl)- imidazole: A Potent Inhibitor of P38 MAP Kinase
J. Sisko (1998)
10.1016/S0040-4039(98)00886-7
First highly regio- and diastereoselective synthesis of Δ2-pyrazolines by [3+2] cycloaddition of chiral non-racemic Fischer carbene complexes with nitrilimines
J. Barluenga (1998)
10.3987/REV-97-SR(N)2
Intramolecular Reactions of Nitrilimines as a Fruitful Source of Heterocycles
G. Zecchi (1998)
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A New Synthesis of Carmethizole and Related Nitrogen Analogues.
M. Hay (1997)
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Structure and molecular interactions of anti-thyroid drugs. Part 2. Electron donor properties of carbimazole1
C. Laurence (1998)
10.1016/S0040-4039(97)01469-X
An unexpected reaction: [2 +1] cycloaddition of [60]fullerene with 4, 4, 5, 5-tetramethylimidazolidine-2-thione and DL-valine
J. Xu (1997)
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SOLID-SUPPORTED SYNTHESIS OF IMIDAZOLES : A STRATEGY FOR DIRECT RESIN-ATTACHMENT TO THE IMIDAZOLE CORE
M. Bilodeau (1998)
10.1002/JHET.5570350120
Formation and Structure of 1-Amino-4-Methyl-4-(4-methyl-5-phenyl-1H-pyrazol-3-ylamino)-3-phenyl-4,5-dihydro-1H-pyrazol-5-one
D. Donati (1998)
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Transition Metal Complexes with Organoazide Ligands: Synthesis, Structural Chemistry, and Reactivity.
M. Barz (1998)
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Studies on the reactions of HOBt, HOOBt, HOSu with dichloroalkane solvents
J. Ji (1998)
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Trans-Selective Olefination of Carbonyl Compounds by Low-Valent Titanium-Mediated Dehydroxybenzotriazolylation
A. R. Katritzky (1998)
10.1016/S0040-4039(98)00222-6
Hydroxy-directed diastereoselective ene reaction of triazolinediones with chiral allylic alcohols
W. Adam (1998)
10.1016/S0022-328X(97)00736-5
Chelating N-heterocyclic carbene ligands in palladium-catalyzed heck-type reactions 1 N-Heterocyclic
W. Herrmann (1998)
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Ligands with Cycloalkane Backbones Part 6; A Series of Chiral 2-Pyrazolylcyclohexan-1-ols: Synthesis, Spectroscopic Features and Kinetic Resolution
M. Barz (1998)
10.1055/S-1998-2131
Palladium-Catalyzed Arylation and Acylation of 1-Benzyloxy-1,2,3-triazole Through a Directed Ortho Lithiation-Transmetalation Strategy
J. Felding (1998)
10.1016/S0040-4039(96)02423-9
Zoamides A-D: New marine zoanthoxanthin class alkaloids from an encrusting Philippine Parazoanthus sp.
M. D'ambrosio (1997)
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HYPERVALENT IODINE OXIDATION OF 1,3,5-TRISUBSTITUTED PYRAZOLINES : A FACILE SYNTHESIS OF 1,3,5-TRISUBSTITUTED PYRAZOLES
S. Singh (1997)
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Synthesis of 2-Alkylbenzimidazoles via TiO2-Mediated Photocatalysis
H. Wang (1997)
10.1016/S0040-4020(97)00402-X
Reactivity of lithium trimethylsilyldiazomethane and diazomethane toward the 5,6-double bond of uracil and uridine derivatives
R. Saladino (1997)
10.1021/JA963881B
ASYMMETRIC EXO-SELECTIVE DIELS-ALDER REACTIONS BY STERIC ATTENUATION OF SECONDARY ORBITAL INTERACTIONS
T. S. Powers (1997)
10.1016/S0040-4039(97)00159-7
CHEMOSELECTIVE ADDITION OF GRIGNARD REAGENTS TO ALKOXYCARBONYLALKYL-N-IMIDAZOLIUM-N-METHYL AMIDES : SYNTHESIS OF 4-OXO AND HOMOLOGOUS ESTERS
M. A. Heras (1997)
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Gas phase thermolysis of pyrazolines. 5. Electronic structure and gas phase thermolysis of tetrazole derivatives studied by photoelectron spectroscopy
A. M. Awadallah (1997)
10.3987/COM-96-7731
Remarkable Fast N-Alkylation of Azaheterocycles under Microwave Irradiation in Dry Media
D. Bogdał (1997)
10.1016/S0040-4020(96)01009-5
The para-toluenesulfonic acid-promoted synthesis of 2-substituted benzoxazoles and benzimidazoles from diacylated precursors
M. Deluca (1997)
10.1016/S0040-4039(98)00257-3
Solid phase synthesis of 5-aminopyrazoles and derivatives part II
R. Wilson (1998)
10.1021/JA9717828
Eleutherobin, a New Cytotoxin that Mimics Paclitaxel (Taxol) by Stabilizing Microtubules
T. Lindel (1997)
10.1016/S0040-4039(97)10207-6
Reductive cyclization of o-nitrophenylazobenzenes to 2-aryl-2H-benzotriazoles by SmI2
B. H. Kim (1997)
10.1021/JO981650C
The Reactions of Hydrazines with α-Lactams. Regiochemistry of Hydrazine Addition and Subsequent Ring Closure to N-Aminohydantoins or 1,2,4-Triazine-3,6-diones
R. V. Hoffman (1998)
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Chiral synthesis of tri-O-methylimbricatine, an etherified derivative of the starfish alkaloid imbricatine
M. Ohba (1998)
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Key Intermediates in Combinatorial Chemistry: Access to Various Heterocycles from alpha,beta-Unsaturated Ketones on the Solid Phase.
A. Marzinzik (1998)
10.1021/JO9621480
Structural Characterization of 4-Cyanoimidazolium-5-olate, 4,4-Diphenyl-5-imidazolinone, and 4,5-Dicyanoimidazole. A Novel Mesoionic Compound and Decoding of Intermolecular Hydrogen Bonds
Ermanno Barni (1997)
10.1016/S0040-4039(98)01493-2
Pd-catalyzed aminations of aryl triazolones: Effective synthesis of hydroxyitraconazole enantiomers
G. J. Tanoury (1998)
10.1016/S0022-328X(98)00824-9
Pyrazole complexes of acyloxydialkylboranes
M. Dabrowski (1998)
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Synthesis of α-Benzotriazole Sulfides Promoted by Samarium Diiodide
G. Lu (1998)
10.1021/JO9709110
Preparations of Trisubstituted Hydrazines and Pyrazolidines from N-(1-Benzotriazolylalkyl)hydrazines.
A. Katritzky (1997)
10.1016/S0040-4039(98)00492-4
Synthesis of tetrazole analogs of α-amino acids by alkylation of a Schiff base of α-aminomethyltetrazole
Y. Satoh (1998)
10.1002/(SICI)1521-3773(19980803)37:13/14<1963::AID-ANIE1963>3.0.CO;2-M
1,3,4,5-TETRAPHENYLIMIDAZOL-2-YLIDENE THE REALIZATION OF WANZLICK'S DREAM
A. J. Arduengo (1998)
10.1080/00397919808005963
A CONVENIENT SYNTHESIS OF 5-SUBSTITUTED 1-1-(DIETHOXYPHOSPHORYL)ALKYL-1H-1,2,3-TRIAZOLES
D. Sikora (1998)
10.1021/JO9623191
General and Efficient Approaches to Fused [1,2-a]Pyrroles and [1,2-a]Indoles
A. R. Katritzky (1997)
10.1016/S0040-4039(97)01137-4
A new and efficient procedure for preparing 1,2,3-triazoles
G. Romeiro (1997)
10.1080/00397919708006101
Synthesis of 1-(T-Butoxycarbonyl)benzotriazole and 1-(p-Methoxybenzyloxycarbonyl)benzotriazole and Their Use in the Protection of Amino Acids
A. R. Katritzky (1997)
10.1016/S0040-4020(97)00427-4
Preparation and reactions of new zincated nitrogen-containing heterocycles
A. S. B. Prasad (1997)
10.1021/JO970011J
A New Synthesis of Diazenes (Azoalkanes) Using 4-(S,S-Dimethylsulfoximino)- 1,2,4-triazoline-3,5-dione. The Construction of Diazenes from Amino Nitrenes via Base-Induced Sulfoximine Cleavage
Scott Meehan and (1997)
10.1246/BCSJ.71.467
Palladium-Catalyzed Arylation of Azole Compounds with Aryl Halides in the Presence of Alkali Metal Carbonates and the Use of Copper Iodide in the Reaction
S. Pivsa-Art (1998)
10.1016/S0040-4039(98)00341-4
The alkyne pathway to keramadine from the marine sponge Agelas sp.
T. Lindel (1998)
10.1016/S0040-4020(97)00940-X
A facile synthesis of pyrazole, isoxazole and pyrimidine ortho-dicarboxylic acid derivatives via β-enaminoketoesters
A. C. Veronese (1997)
10.1016/S0040-4020(98)00353-6
The preparation of functionalized amines and amides using benzotriazole derivatives and organozinc reagents
A. Katritzky (1998)
10.1080/00397919808004905
Preparation of 5-Alkylthio and 5-Arylthiotetrazoles from Thiocyanates Using Phase Transfer Catalysis
Blaise Leblanc (1998)
10.1002/CHIN.199805043
Functionalized Naphthalenes by Benzotriazole-Mediated Annulation.
A. Katritzky (1997)
10.1055/S-1998-2069
Synthesis of 4-Substituted Imidazoles via Palladium-Catalyzed Cross-Coupling Reactions
M. Jetter (1998)
10.1080/00304949709355203
SYNTHESIS OF UNSYMMETRICAL α-(N-ARYLCARBONYL)AMINO DIORGANYL SELENIDES via BENZOTRIAZOLE INTERMEDIATES PROMOTED BY SmI2
W. Bao (1997)
10.1039/A803139H
Consecutive Pschorr–Sandmeyer reactions in a pyrazole series. Part 2.1 Access to the [2]benzopyrano[4,3-c]pyrazole system of pharmaceutical interest
G. Daidone (1998)
10.1016/S0040-4020(98)00955-7
A FACILE ROUTE TO NEW POTENTIAL HELICATING LIGANDS
B. Abarca (1998)
10.3987/COM-97-S(N)109
On the reactivity of hydroximoyl chlorides preparation of 2-arylimidazolines
H. Salgado-Zamora, (1998)
10.1016/S0040-4039(98)01814-0
A SHORT SYNTHESIS OF THE MARINE BIOACTIVE METABOLITE (+/-) GIROLLINE
S. Marchais (1998)
10.1080/00304949809355320
RECENT PROGRESS IN SOLID PHASE HETEROCYCLE SYNTHESES. A REVIEW
J. W. Corbett (1998)
10.1021/JO972156W
Functionalized (Benzotriazol-1-yl)methanes as 1,1-Dipole Synthon Equivalents in Diverse Annulations to Aromatic and Heteroaromatic Rings
A. R. Katritzky (1998)
10.1021/JO980200H
Palladium-Catalyzed Reaction of N-Allylbenzotriazoles with Amines: A Novel Method for the Preparation of Allylamines
A. R. Katritzky (1998)
10.1002/JHET.5570340513
Reactivity of p‐phenyl substituted β‐enamino compounds using K‐10/ultrasound. I. Synthesis of pyrazoles and pyrazolinones
C. J. Valduga (1997)
10.3987/COM-97-7997
Cycloaddition reactions of azidomethyl phosphonate with acetylenes and enamines. Synthesis of triazoles
Frédéric Louërat (1998)
10.3987/COM-96-S(N)1
BASE-CATALYZED REARRANGEMENT OF ALPHA -BENZOTRIAZOLYL ALKOXIDE ANIONS : SYNTHESIS OF ONE-CARBON HOMOLOGATED ALPHA -SUBSTITUTED ALKYL KETONES
A. R. Katritzky (1998)
10.1071/C97077
Synthesis, Structure and Reactivity of a Novel Series of Diastereomeric Dirhodium(II) Tetracarboxamidates. Catalysts for Asymmetric Diazoacetate Transformations
G. Roos (1998)
10.1016/S0040-4039(98)01222-2
Novel synthesis of heterocyclic aryl amidines
R. Tommasi (1998)
10.1080/00397919708004211
Benzotriazole-Assisted Synthesis of N-(α-Cyanoalkyl)sulfonamides
A. R. Katritzky (1997)
10.1016/S0957-4166(98)00356-5
Cycloaddition reactions of carbohydrate derivatives. Part 7: [3+2] cycloadditions of chiral nitrilimines
Attila Agócs (1998)
10.1002/JHET.5570350418
PYROLYSIS AND PHOTOLYSIS OF 1-AROYLAMINO-4,5-DIARYL-1,2,3-TRIAZOLES : GENERATION AND THERMAL TRANSFORMATIONS OF 4,5-DIARYL-1,2,3-TRIAZOLYL RADICALS
C. Hadjiantoniou-Maroulis (1998)
10.1021/JO9807161
Diastereoselective Solid-Phase Synthesis of Novel Hydantoin- and Isoxazoline-Containing Heterocycles
K. Park (1998)
10.1016/S0040-4039(97)10418-X
[3+2]-Cycloaddition reactions of alkynyl(phenyl)iodonium triflates with ethyl diazoacetate, N-t-butyl-α-phenyl nitrone and t-butylnitrileoxide as 1,3-dipoles
P. Stang (1997)
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Synthesis of 2-Substituted 1-Hydroxyimidazoles through Directed Lithiation.
B. L. Eriksen (1998)
10.1021/JA982794B
Ru3(CO)12-Catalyzed Site-Selective Carbonylation Reactions at a C−H Bond in Aza-Heterocycles
T. Fukuyama (1998)
10.1139/V97-169
2-Trichloromethylimidazole. Condensation reactions with anions stabilized by carbonyl groups
J. Gonzalez (1997)
10.1039/A802020E
Convenient protection of amines as carbamates using polymer-bound HOBT as catalyst
K. Dendrinos (1998)
10.1016/S0040-4039(98)01097-1
Diene tricarbonyl iron complexes bearing a free diazo group. III.1 Synthesis of pyrazoles and chiral complexes with α-aminoacid or dienylcyclopropane substructures by 1,3-dipolar cycloaddition reactions
M. Franck-Neumann (1998)
10.1016/S0040-4039(98)01203-9
First total synthesis of fungerin an antifungal alkaloid from Fusarium sp.
R. Benhida (1998)
10.3987/COM-98-8115
Synthesis of Pyrazolo[4,3-c]quinoline-5-oxide by Reductive Cyclization of 4-Acetyl-5-(2-nitrophenyl)pyrazole: Revision of the Reported Structures
G. Kalayanov (1998)
10.3987/REV-97-490
Synthesis of Pyrazolo[1,5-a]quinolines and Related Reduced Derivatives
D. Barrett (1997)
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CONDENSATION REACTION OF ACYLOINS WITH UREA WITHOUT SOLVENT UNDER MICROWAVE IRRADIATION
J. Feng (1997)
10.3987/COM-96-7715
Direct Synthetic Approach to N-Substituted 1-Amino-2,3-dihydro-1H-imidazole-2-thiones
J. Schantl (1997)
10.1071/C97058
Mediated Oxidative Cyclization of Derivatives of 2-(Phenylmethylidene)hydrazinecarboximidothioic Acid ⁄
Abdelselam Ali (1997)
10.3987/COM-96-7648
SELECTIVE SYNTHESIS OF 2-SUBSTITUTED INDAZOLIN-3-ONES WITHOUT N-1 PROTECTION
E. Díez-Barra (1997)
10.1021/OM961038G
Nickel(II) Complexes of N-Heterocyclic Carbenes†
W. Herrmann (1997)
10.1016/S0040-4020(97)00394-3
AMBIDENT HETEROCYCLIC REACTIVITY : INTRAMOLECULAR ALKYLATIONS OF 2,4-DISUBSTITUTED BENZIMIDAZOLES
M. R. Haque (1997)
10.1016/S0040-4020(97)00637-6
Why α-azido five-membered heterocycles decompose so fast? An ab initio molecular orbital study
D. Sengupta (1997)
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Solid-Supported tert-Alkoxycarbonylation Reagents for Anchoring of Amines during Solid Phase Organic Synthesis.
A. S. Hernández (1997)
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An Unusual Trifluoromethyl Elimination Reaction from the 4,4-Bis(trifluoromethyl)-5-hydroxyimidazoline Ring System.
Hui-Yin Li (1997)
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1,2,4‐Triazoles. Improved synthesis of 5‐substituted 4‐amino‐3‐mer‐cato‐(4H)‐1,2,4‐triazoles and a facile route to 3,6‐disubstituted 1,2,4‐triazolo[3,4‐b][1,3,4]thiadiazoles
F. Invidiata (1997)
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(Trifluoroacetyl)benzotriazole: A Convenient Trifluoroacetylating Reagent.
A. Katritzky (1997)
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Preparation of resin-bound ketimines via transimination and its application in the synthesis of hydantoin libraries
Sang-Hyeup Lee (1998)
10.1055/S-1998-2175
An Efficient Approach to Novel 5,5-Disubstituted Dithiohydantoins via α-Cyano-α-(dihalogenomethyleneamino)alkanoic Acid Esters
M. Bergemann (1998)
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A MULTINUCLEAR NMR STUDY (1H, 13C, 15N) OF 1-MONOSUBSTITUTED PYRAZOLES
J. Elguero (1998)
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AN EFFECTIVE SYNTHETIC ROUTE TO EF5
I. R. Baird (1998)
10.1016/S0040-4039(98)00134-8
A short asymmetric synthesis of 2,5-disubstituted pyrrolidines
A. Katritzky (1998)
10.1039/A803609H
Clean three-step synthesis of 4,5-dihydro-1H-pyrazoles starting from alcohols using polymer supported reagents
F. Haunert (1998)
10.1016/S0040-4039(98)00249-4
Synthesis of heterocyclic aza-phosphinate ligands based on the benzimidazole skeleton
Chris D. Edlin (1998)
10.3987/COM-97-7772
Novel double tripodal pyrazolyl macrocycles. Synthesis and X-ray structure of hexa-azole ligands
Johan E. Bol (1997)
10.1021/JO9811221
NOVEL AND EFFICIENT ENTRY TO GAMMA -ARYL-SUBSTITUTED GAMMA , DELTA -UNSATURATED KETONES, AMIDES, NITRILES, AND SULFONES BY CONJUGATE ADDITIONS OF 2-BE NZOTRIAZOLYLETHYLSILANES
A. R. Katritzky (1998)
10.1039/A807441K
Dipolarophilic behaviour of the thiophene ring in intramolecular nitrile imine cycloadditions
G. Broggini (1998)
10.1016/S0040-4039(98)00448-1
New salt binders whose ligands were composed of four aromatic sp2 nitrogens and purely based on a cavitand
Jaehyung Yoon (1998)
10.3987/COM-98-8162
ACYLATION OF GUANYLHYDRAZONES DERIVED FROM CYCLIC KETONES: SYNTHESIS OF 3-ACYLAMINO-1-CYCLOALKENYL-5-METHYL-1H-1,2,4-TRIAZOLES
Z. Gyoergydeak (1998)
10.1016/S0040-4020(97)00727-8
Regioselective lipase catalyzed synthesis of diester crowns. New asymmetric macrocycles containing a 1,3-bis(1H-pyrazol-1-yl)propane unit
S. Conde (1997)
10.1016/S0040-4039(97)10776-6
Short enantioselective approach to substituted triazolopyridazines from [(S)R]-1-(1E, 3E)-1-p-tolylsulfinyl-1,3-pentadiene
M. Carreño (1998)
10.1016/S0022-328X(97)00680-3
Tin(IV) and organotin(IV) derivatives of novel β-diketones. III Diorgano- and dihalotin(IV) complexes of 1,3-dimethyl-4-R(CO)-pyrazol-5-one (R=CH3, C6H5) and the crystal structure of trans-dicyclohexylbis(1,3-dimethyl-4-acetylpyrazolon-5-ato)tin(IV)
C. Pettinari (1998)
10.1016/S0040-4039(98)01472-5
DIPOLAR CYCLOADDITION REACTIONS ON A SOLUBLE POLYMER-SUPPORTED DIPOLAROPHILE : SYNTHESIS OF SUGAR-DERIVED TRIAZOLES
M. Moore (1998)
10.1016/S0040-4039(98)01672-4
Solid-phase synthesis of substituted 1-phenyl-2-aminomethyl-benzimidazoles and 1-phenyl-2-thiomethyl-benzimidazoles
D. Tumelty (1998)
10.1016/S0040-4039(97)00286-4
Ring-closing olefin metathesis for the synthesis of 1,8-diazabicyclo[4.3.0]non-3-ene-7,9-diones
A. B. Dyatkin (1997)
10.1135/CCCC19980534
Novel Amphiphilic Cyclodextrins: Per[6-deoxy-6-(4,5-dicarboxy-1,2,3-triazol-1-yl)-2,3-di-O-methyl] Derivatives
T. Kraus (1998)
10.1080/00397919708007088
APPLICATION OF CARBODIIMIDE IN HETEROCYCLIC SYNTHESIS : NEW FACILE SYNTHESIS OF 2-AMINOIMIDAZOLINONE DERIVATIVES
M. Ding (1997)
10.1021/JO980717T
A Practical and Efficient Large-Scale Preparation of (4R,5S)-N-Propenoyl-1,5- dimethyl-4-phenylimidazolidin-2-one. A Simple Procedure for the Preparation of N-Acylimidazolidin-2-ones and N-Acylbornane 2,10-Sultams
W. Clark (1998)
10.1021/JA980520I
Chiral Lewis Acid Catalysis in Conjugate Additions of O-Benzylhydroxylamine to Unsaturated Amides. Enantioselective Synthesis of β-Amino Acid Precursors
M. P. Sibi (1998)
10.1016/S0957-4166(98)00070-6
Enhanced reactivity of tuned imidazolidin-2-one chiral auxiliaries in Diels–Alder reactions
G. Roos (1998)
10.1039/A801250D
Kinetics and mechanism of tetrazole-catalyzed phosphoramidite alcoholysis
Erkki J. Nurminen (1998)
10.1021/JO971152O
Synthesis of 2,6,7-Trichloro-1-(β-d-ribofuranosyl)naphtho[2,3-d]imidazole: A Linear Dimensional Analogue of the Antiviral Agent TCRB
Z. Zhu (1998)
10.1080/00397919808005973
Synthesis of New Benzylic Ethers of Oximes Derived from 1-Phenyl-pyrazole Compounds
E. Muri (1998)
10.1246/BCSJ.70.2209
A Convenient Synthesis of 1,2-Dihydro-1,2,4-triazolo(3,2-b)quinazolin-9(1H)-ones and Their 1,2,4-Triazolo Derivatives.
G. A. El-Hiti (1997)
10.3891/ACTA.CHEM.SCAND.52-0218
COCRYSTALLIZING AGENTS FOR AMINO ACIDS. II. THE CRYSTAL STRUCTURES OF L-HISTIDINE . 4,5-IMIDAZOLEDICARBOXYLIC ACID (1:1) AND L.LYSINE.4,5-IMIDAZOLEDIC ARBOXYLIC ACID (1:1)
C. Görbitz (1998)
10.1016/S0040-4039(98)01487-7
The synthesis of 3,5-di- and 3,5,5-trisubstituted-1,3-oxazolidines from primary amines and carbonyl compounds
A. Katritzky (1998)
10.1139/CJC-76-2-221
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