Total Synthesis of (+)-Hygrine via Asymmetric Phase-Transfer Catalytic Alkylation
作者:Jeong-Hee Lee、Byeong-Seon Jeong、Jin-Mo Ku、Sang-sup Jew、Hyeung-geun Park
DOI:10.1021/jo061108l
日期:2006.8.1
The first enantioselective synthesis of (+)-hygrine (1) is reported. 1 was obtained in 12 steps with 29% overall yield and 97% ee via asymmetric phase-transfer catalytic alkylation and ring-closing metathesis as key steps. The absolute configuration of (+)-hygrine could be directly confirmed as R.
报道了(+)-香氨酸(1)的第一对映选择性合成。通过关键步骤,通过不对称相转移催化烷基化和闭环复分解反应,分12步获得1的化合物,总收率为29%,ee为97%。(+)的绝对构型- hygrine可直接确认为[R 。