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Catalytic Enantioselective Reactions. Part 16. Oxazaborolidine-catalyzed Asymmetric Borane Reduction Of α-keto Acetals

Byung Tae Cho, Y. Chun
Published 1999 · Chemistry

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Asymmetric reductions of α-keto acetals using various oxazaborolidines and borane reagents as catalyst and the hydride source, respectively, were compared. The reduction catalyzed by Corey’s CBS reagents with N-phenylamine–borane reagents provided α-hydroxy acetals with very high enantioselectivities for most aromatic analogues.
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