Stereoselective synthesis of substituted exo-glycals from 1-exo-methylene pyranoses
作者:Ana M. Gómez、Ana Pedregosa、Serafı́n Valverde、J.Cristóbal López
DOI:10.1016/s0040-4039(03)01455-2
日期:2003.8.4
Halo-exo-glycals of the gluco-, manno- and galacto- series, readily prepared by reaction of 1-exo-methylene pyranoses with iodonium dicollidinium triflate (IDCT), undergo Suzuki or B-alkyl Suzuki cross-coupling reactions with boronic acids or alkyl boranes to yield, in a stereoselective manner, functionalized exo-glycals.
卤代外切所述的-glycals葡糖- ,甘露-和半乳-系列,容易地由1-反应制备外-亚甲基吡喃糖与碘鎓三氟甲磺酸酯dicollidinium(IDCT),经历Suzuki或B-烷基Suzuki交叉偶联反应与硼酸或烷基硼烷以立体选择性的方式产生官能化的外糖。