Enantioselective Protonation of Lithium Enolates with Chiral Imides Possessing a Chiral Amide
作者:Akira Yanagisawa、Tetsuo Kikuchi、Tsuyoshi Watanabe、Hisashi Yamamoto
DOI:10.1246/bcsj.72.2337
日期:1999.10
New chiral imides possessing a chiral amide can be prepared from 1,3,5-trimethyl-r-1,c-3,c-5-cyclohexanetricarboxylic acid or related triacids and optically active amines. These imides are superior to 1,3,5-trimethyl-c-5-[(4S,5S)-4,5-diphenyl-2-oxazolin-2-yl]-r-1,c-3-cyclohexanedicarboximide reported previously as a chiral proton source for enantioselective protonation of lithium enolates of 2-alkylcycloalkanones
具有手性酰胺的新型手性酰亚胺可由1,3,5-三甲基-r-1,c-3,c-5-环己烷三羧酸或相关的三酸和旋光胺制备。这些酰亚胺优于先前报道的 1,3,5-三甲基-c-5-[(4S,5S)-4,5-二苯基-2-恶唑啉-2-基]-r-1,c-3-环己烷二甲酰亚胺作为手性质子源,用于 2-烷基环烷酮的锂烯醇化物的对映选择性质子化。