A sequential reaction process to assemble polysubstituted indolizidines, quinolizidines and quinolizidine analogues
作者:Guorong Cai、Wei Zhu、Dawei Ma
DOI:10.1016/j.tet.2006.03.068
日期:2006.6
The omega-iodo-alpha,beta-alkynoates and their ketone, sulfone or phosphonate analogues react with delta-chloropropylamines in MeCN assisted with K2CO3 to undergo a sequential S(N)2/Michael addition/S(N)2/S(N)2 reaction process, giving polysubstituted indolizidines or quinolizidines in good to excellent yields. This sequential reaction process is also compatible with three other substituted alpha,beta-alkynoates, affording quinolizidine analogues in moderate to good yields. (c) 2006 Elsevier Ltd. All rights reserved.
A Formal [3+2] Cycloaddition Process with Nonactivated Aziridines to Polysubstituted Indolizidines
作者:Wei Zhu、Guorong Cai、Dawei Ma
DOI:10.1021/ol0513692
日期:2005.12.1
[chemical reaction: see text]. Heating a mixture of ethyl 7-iodo-2-heptynoate (or its analogues), 2-aryl aziridines, and K2CO3 in dry CH(3)CN delivers polysubstituted indolizidines. This reaction goes through an S(N)2/formal [3+2] cycloaddition process and represents the first synthetically useful example of the formal [3+2] cycloaddition process through a C-N bond cleavage of nonactivated aziridines.