Several chiral diamines, (S)-1-alkyl-2-(arylamino)methylpyrrolidine, were used as chiral catalysts for the enantioselective addition of diethylzinc to aldehydes. The best results were obtained by employing 0.15 equiv of (S)-2-anilinomethyl-1-benzylpyrrolidine, and chiral secondary alcohols were obtained with high enantiomeric excesses (up to 94% ee).
几种手性二胺,(S)-1-烷基-2-(芳基
氨基)甲基
吡咯烷,在
二乙基锌对醛的对映选择性加成反应中作为手性催化剂。使用0.15当量的(S)-2-
氨基甲基-
1-苄基吡咯烷可以获得最佳结果,手性二级醇以高对映体过量(最高可达94% ee)获得。