The borane modified by chiral oxazoborolidines enantioselectively reduced aliphatic and aromatic ketones to yield sec-alcohols with 100% yield and medium to high optical yields.

• 硼烷-手性(口恶)唑硼烷-还原体系能将脂肪酮和芳香酮还原为仲醇,化学还原收率町达100%25,光学收率也比较高。