Stereoselective synthesis of 1,2-Amino alcohols by addition of organocuprate·BF3 complexes and organolithium reagents to an α-silyloxyaldimine derived from (S)-ethyl lactate
作者:Kaori Ishimaru、Kazutaka Tsuru、Katsunori Yabuta、Makoto Wada、Yohsuke Yamamoto、Kin-ya Akiba
DOI:10.1016/0040-4020(96)00776-4
日期:1996.10
1,2-Amino alcohols were synthesized by addition of organocuprate·BF32 (R=n-Bu, n-octyl, Me, phenethyl, Ph), organocopper·BF33 (R=Me, n-Bu), and organolithiums (R=n-Bu, n-octyl, Me, phenethyl, Ph) to an α-silyloxyaldimine 1 derived from commercially available (S)-ethyl lactate. The reactions with organocuprate·BF32 and organocopper·BF33 led to the anti isomers almost exclusively (anti:syn=>98:<2 for
通过添加有机铜·BF 3 2(R = n -Bu,n-辛基,Me,苯乙基,Ph),有机铜·BF 3 3(R = Me,n -Bu),合成1,2-氨基醇有机锂(R =n- Bu,n-辛基,Me,苯乙基,Ph)形成衍生自可商购的(S)-乳酸乙酯的α-甲硅烷氧基醛亚胺1。与有机铜·BF 3 2和有机铜·BF 3 3的反应几乎完全导致了反异构体(R = n时,anti:syn => 98:<2-Bu,n-辛基,Me,苯乙基和anti:syn = 95:5(对于R = Ph,分离产率为52-93%),并且可以通过使用有机锂以高立体选择性获得顺式异构体(anti:syn = 10: 90〜20:80,孤立产率为41-71%)。