作者:Shunya Takahashi、Nobuyuki Hishinuma、Hiroyuki Koshino、Tadashi Nakata
DOI:10.1021/jo051686m
日期:2005.11.1
A new synthesis of epoxyketone 22 is described that is a key intermediate in Barton's synthesis of ovalicin (2), a powerful anti-angiogenetic inhibitor. The key process for the construction of 22 was ring-closing metathesis of olefins 11 and 12 obtained from 2,3:5,6-di-O-isopropylidene-α-d-mannofuranose (4) and regioselective desilylation of tri-TES ether 19. Furthermore, an alternative stereoselective
描述了环氧酮22的新合成方法,它是Barton合成卵磷脂(2)(一种强大的抗血管生成抑制剂)的关键中间体。构造22的关键过程是从2,3:5,6-二-O-异亚丙基-α - d-甘露呋喃糖(4)获得的烯烃11和12的闭环复分解和tri-TES醚的区域选择性脱甲硅烷基化19。此外,从一个替代立体选择性路线22到2也已开发,和的总产率2从4为10.0%。