2-[(S)-1-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-2-methyl-2-nitro-propyl]-malonic acid dimethyl ester 在
caesium carbonate 作用下,
以
二甲基亚砜 为溶剂,
生成 (R)-3-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-cyclopropane-1,1-dicarboxylic acid dimethyl ester 、 (S)-3-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-cyclopropane-1,1-dicarboxylic acid dimethyl ester