Mitsunobu reaction of 1,5-anhydro-3,4,6-tri-O-benzyl-2-deoxy-2-hydroxymethyl-hex-1-enitols and 1,5-anhydro-2-deoxy-4,6-O-protected-hex-1-enitols. A novel method for the synthesis of 2-C-methylene glycosides and an useful alternative to Ferrier rearrangement
作者:Namakkal G. Ramesh、Kalpattu K. Balasubramanian
DOI:10.1016/0040-4020(94)00939-r
日期:1995.1
A simple and convenient method for the synthesis of aryl-3,4,6-tri-O-benzyl-2-deoxy-2-methylene-hexopyranosides 5,6 and 7, glycosides which are not accessible by the conventional Ferrier rearrangement, has been described based on the Mitsunobu reaction of alcohols 3 and 4 with substituted phenols. The anomeric configurations of glycosides 5 and 6 were established by detailed NOE studies. The reaction
一种简单而方便的合成芳基-3,4,6-三-O-苄基-2-脱氧-2-亚甲基-己吡喃糖苷5,6和7的方法,这些糖苷是常规Ferrier重排无法达到的基于醇3和4与取代的酚的Mitsunobu反应描述了上述方法。通过详细的NOE研究确定了糖苷5和6的端基异构体构型。该反应也成功地扩展到邻苯二甲酰基衍生物10的合成。还已经用多种亲核试剂证明了温和的,中性的和非酸性的Feer重排的替代物,用于合成2,3-二脱氧-己二-2-烯吡喃糖苷。