Method of making asymmetric de ring intermediates for the synthesis of
申请人:North Carolina State University
公开号:US05395939A1
公开(公告)日:1995-03-07
Methods of making asymmetric DE ring intermediates for the synthesis of camptothecin and camptothecin analogs employ a dioxane intermediate as the immediate precursor to the DE ring intermediate. Novel intermediates are also disclosed.
Method of making asymmetric DE ring intermediates for the synthesis of
申请人:North Carolina State University
公开号:US05486615A1
公开(公告)日:1996-01-23
Methods of making asymmetric DE ring intermediates for the synthesis of camptothecin and camptothecin analogs employ a dioxane intermediate as the immediate precursor to the DE ring intermediate. Novel intermediates are also disclosed.
Asymmetric synthesis of camptothecin alkaloids: A nine-step synthesis of (S)-camptothecin
作者:Daniel L. Comins、Hao Hong、Gao Jianhua
DOI:10.1016/s0040-4039(00)73492-7
日期:1994.7
DE Ring camptothecin intermediate II was prepared enantioselectively from 2-chloro-6-hydroxypyridine in six steps and used in a nine-step synthesis of (S)-camptothecin.