N-Alkenyl nitrone dipolar cycloaddition routes to piperidines and indolizidines. Part 8. The scope of tandem reactions involving hydroxylamine-alkyne cyclisations
作者:Edwin C Davison、Ian T Forbes、Andrew B Holmes、Jacqueline A Warner
DOI:10.1016/0040-4020(96)00643-6
日期:1996.8
A tandem sequence of hydroxylamine-alkyne cyclisation/1,3-dipolar cycloaddition, provides useful entry into tricyclic systems of type 4. The scope of such reactions is explored in this paper. A novel cascade cyclisation of N-hydroxypyrrolidines of type 26 and 28 involving hydroxylamine-alkyne cyclisation, Cope elimination and 1,3-dipolar cycloaddition is also reported.
羟胺-炔环化/ 1,3-偶极环加成的串联序列,为进入4型三环系统提供了有用的入口。本文探讨了此类反应的范围。还报道了26和28型N-羟基吡咯烷的新型级联环化,包括羟胺-炔环化,Cope消除和1,3-偶极环加成。