Synthesis of optically-active benzylic amines; asymmetric reduction of ketoxime ethers with chiral oxazaborolidines
作者:Evelyne Fontaine、Claudie Namane、Jérôme Meneyrol、Michel Geslin、Laurence Serva、Eliane Roussey、Stéphanie Tissandié、Mohamed Maftouh、Pierre Roger
DOI:10.1016/s0957-4166(01)00358-5
日期:2001.8
The preparation of novel optically active benzylic amines by the enantioselective reduction of phenone oximes using chiral oxazaborolidine is described. The choice of the chiral 1,2-amino alcohol (S)-diphenylvalinol as chiral inducer and that of the benzyl group for the O-oxime substituent is explained. 23 primary amines are obtained, with high enantioselectivity (e.e.=98%), good yield (74%) on preparative
描述了通过使用手性恶唑硼烷环烷对映异构体还原苯肟肟制备新型旋光苄胺的方法。解释了手性1,2-氨基醇(S)-二苯基戊醇作为手性诱导剂的选择以及O-肟取代基的苄基的选择。获得了23种伯胺,在制备规模上具有高对映选择性(ee = 98%),良好的收率(74%)。提出了机械的解释。