The oxirane ring opening of 2,3-anhydro-pentopyranosides and 2,3-anhydro-hexopyranosides with organoaluminate reagents is described. By the use of trialkylalkynylaluminates, deoxy-alkynyl sugars are obtained in good yields. Trialkylalkenylaluminates are less efficient and react only with the pentosides. Vinylmagnesium bromide is used as an alternative reagent for the introduction of a vinyl group.
介绍了使用
有机铝酸盐试剂对 2,3-anhydro-pentopyranosides 和 2,3-anhydro-hexopyranosides 进行环
氧化开环的过程。通过使用三烷基炔基
铝酸盐,可以获得产率良好的
脱氧炔基糖。三烷基炔基
铝酸盐的效率较低,只能与戊苷类发生反应。
溴化
乙烯基镁可作为引入
乙烯基的替代试剂。