Asymmetric synthesis of α-amino acids and α-N-hydroxyamino acids via electrophilic amination of bornanesultam-derived enolates with 1-chloro-1-nitrosocyclohexane.
作者:Wolfgang Oppolzer、Osamu Tamura
DOI:10.1016/s0040-4039(00)94411-3
日期:1990.1
Successive treatment of N-acylsultams with NaN(TMS)2, l-chloro-1-nitrosocyclohexane () and 1 aq. HCl gave diastereomerically pure, crystalline Nhydroxyamino acid derivatives . Products were converted to various amino acids , an NBOC-amino acid and to N-hydroxyamino acids . (S,S)-Isoleucine () was obtained from N-crotonoylsultam via an organomagnesium- 1,4-addition/enolate trapping process generating
的连续处理Ñ -acylsultams用的NaN(TMS)2,1-氯-1- nitrosocyclohexane( )和1水溶液。HCl得到非对映体纯的结晶N-羟基氨基酸衍生物。将产物转化为各种氨基酸,N BOC-氨基酸和N-羟基氨基酸。(S,S)-异亮氨酸()是通过有机镁-1,4-加成/烯醇化物捕获过程从N-巴豆酰基舒马坦中获得的,产生了两个立体异构中心。