The ZnCl2-mediated glycosidation of an α-1,2-epoxide, prepared by epoxidation of a glycal with 3,3-dimethyldioxirane, with an incoming glycal acceptor is not a priori, as advocated by Danishefski et al, a stereospecific process.
如Danishefski等人所提倡的,立体定向过程不是先验的,ZnCl 2介导的α-1,2-
环氧化物的糖基化是通过先验的,该3-3-
二甲基二环氧乙烷与引入的糖基受体进行环氧化。