Two-Component Method to Enantiopure Quinolizidinones and Indolizidinones. Total Synthesis of (−)-Lasubine II
作者:Dawei Ma、Wei Zhu
DOI:10.1021/ol016802w
日期:2001.11.1
together with piperidines or pyrrolidines 4. Hydrolysis of 4 to the corresponding carboxylic acids followed by treatment of acetic anhydride/triethylamine gives 3 in high yields. Using 3a as a key intermediate, (-)-lasubine II is synthesized in four steps. [reaction: see text]
碳酸钾在65°C下乙腈中的碳酸钾介导的碘化物1和对映体纯的β-氨基酯2的反应提供了喹喔啉酮或吲哚并二酮3以及哌啶或吡咯烷4。4水解为相应的羧酸,然后处理乙酸酐/三乙胺高收率得到3。使用3a作为关键中间体,可通过四个步骤合成(-)-lasubine II。[反应:看文字]