Enantioselective synthesis of hydroxylated pyrrolidines via Sharpless epoxidation and olefin metathesis
作者:Caterina Murruzzu、Antoni Riera
DOI:10.1016/j.tetasy.2006.12.023
日期:2007.1
The enantioselective synthesis of polyhydroxylated pyrrolidines from enantiomerically pure 2,3-epoxy-pent-4-en-1-ol 5 is described herein. The epoxy alcohol, readily available in any configuration by Sharpless epoxidation, was submitted to regioselective C-3 ring-opening with allyl amine, Boc-protection and ring-closing metathesis to yield dehydropyrrole derivative 7. From this key intermediate, 1
本文描述了由对映体纯的2,3-环氧-戊-4-烯-1-醇5对映体选择性合成多羟基化的吡咯烷。可以通过Sharpless环氧化容易地以任何构型获得的环氧醇,经过烯丙基胺的区域选择性C-3开环,Boc保护和开环易位,得到脱氢吡咯衍生物7。从该关键中间体中,高浓度地制备了1,4-二脱氧-1,4-亚氨基-d-核糖醇(+)- 3和1,4-二脱氧-1,4-亚氨基-d-烯丙醇(+)- 4。产量。这些化合物的对映异构体可以从具有相反构型的环氧醇开始以相同的顺序获得。