Enantioselective total synthesis of (−)-indolizidines 209B and 209D via a highly efficient aza-[2,3]-wittig rearrangement of vinylaziridines
作者:Jens Ahman、Peter Somfai
DOI:10.1016/0040-4020(95)00558-p
日期:1995.8
A novel protocol for the enantioselective synthesis of (−)-indolizidines 209B (2) and 209D (1) is described, in which the key step is the highly efficient aza-[2,3]-Wittig rearrangement of vinylaziridines 11a,b into tetrahydropyridines 12a,b. Functional group manipulation and chain elongation then gave esters 16a,b which were converted to the target alkaloids via lactams 17a,b.
一种新颖的协议的对映选择性合成( - ) - indolizidines 209B(2)和209D(1)中描述,其中,所述关键步骤是高效氮杂[2,3] -Wittig vinylaziridines的重排11A,B成四氢吡啶12a,b。然后通过官能团操纵和链延长得到酯16a,b,其通过内酰胺17a,b转化为目标生物碱。