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Chemistry And Biology Of Pteridines And Folates

S. Milstien, G. Kapatos, R. Levine, B. Shane
Published 2002 · Chemistry

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Catalytic reduction of pterin in alkaline solution and subsequent air oxidation produces a series of so-called dimeric pteridines. Structure elucidations of dimer A and B revealed that the expected dipterinyl derivatives are degraded more severely under ring contraction of the pyrimidine moiety to form imidazo(4,5-b)pyrazine derivatives. New structures are proposed for dimer A (19), dimer B (20) and dimer D (3) based upon mass spectral studies and analogies to lumazine dimerisations.
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