作者:R. Karl Dieter、Ningyi Chen、Rhett T. Watson
DOI:10.1016/j.tet.2005.01.094
日期:2005.3
with THF soluble CuCN·2LiCl react with ω-functionalized vinyl halides to afford 2-alkenyl-N-Boc-pyrrolidines. N-Boc deprotection and cyclization via intramolecular N-alkylation generates the pyrrolizidine or indolizidine skeletons. Subsequent functional group manipulation affords enantioenriched (+)-heliotridane, (+)-isoretronecanol, a formal synthesis of (+)-laburnine, (+)-(R)-2,3,5,7a-tetrahydro-1H-pyrrolizine
通过N - Boc-吡咯烷的不对称去质子化,然后用可溶于THF的CuCN·2LiCl处理,生成ω-官能化的乙烯基卤化物,生成2-甲基吡咯烷基铜酸酯,得到2-烯基-N - Boc-吡咯烷。N- Boc脱保护和通过分子内N-烷基化的环化反应生成吡咯并立定或吲哚并立定骨架。随后的官能团操作提供了对映体富集的(+)-三碘三环乙烷,(+)-异戊烯醇,(+)-金丝氨酸,(+)-(R)-2,3,5,7a-四氢-1 H-吡咯嗪的正式合成物,(R)-1,2,3,5,6,8a-六氢吲哚嗪,(+)- ent -δ-可耐碱,(+)-tashiromine和(+)-5-epitashiromine。