Enantioselective Synthesis of α-Substituted Ketones by Asymmetric Addition of Chiral Zinc Enamides to 1-Alkenes
作者:Masaharu Nakamura、Takuji Hatakeyama、Kenji Hara、Eiichi Nakamura
DOI:10.1021/ja035091p
日期:2003.5.1
enamide of a chiral imine derived from a ketone and (S)-valinol or (S)-t-leucinol undergoes addition to 1-alkene to generate a gamma-zincioimine intermediate, which reacts with a carbon electrophile to give upon hydrolysis an optically active alpha-substituted ketone in good yield. The stereoselectivity of the addition reaction may reach 99% for the reaction of a cyclohexanone imine with ethylene.
衍生自酮和 (S)-缬氨醇或 (S)-t-亮氨酸的手性亚胺的锌烯酰胺与 1-烯烃加成生成 γ-锌亚胺中间体,该中间体与碳亲电试剂反应,水解后生成光学活性的 α 取代酮,收率良好。环己酮亚胺与乙烯反应的加成反应立体选择性可达99%。