Abstract
Stereoselective reduction of α-keto ester derived from exo-10,10-diphenyl-2,10-camphanediol with various hydrides proceeded with high diastereoselectivities (≥ 96% de) to afford the corresponding α-hydroxy ester with excellent yields. Change of reducing reagents and molar ratio modifications leading to dramatic changes in diastereofacial selectivity were examined. The auxiliary can be recovered from the asymmetric reaction products without loss of chirality.
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