methyl (4R,5R)-2,2-dimethyl-5-(oxiran-2-yl)-1,3-dioxolane-4-carboxylate 、
碘甲烷 在
lithium diisopropyl amide 作用下,
生成 (4S,5R)-2,2,4-Trimethyl-5-<(2R)-2-oxiranyl>-1,3-dioxolan-4-carbonsaeure-methylester 、
(4S,5R)-2,2,4-Trimethyl-5-<(2R)-2-oxiranyl>-1,3-dioxolan-4-carbonsaeure-methylester