(3-Methoxy-phenyl)-methanesulfonic acid (3aR,5R,6R,6aR)-5-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl ester 、
溴乙酸甲酯 在
正丁基锂 作用下,
以
四氢呋喃 、
正己烷 为溶剂,
反应 17.75h,
生成 (R)-3-[(3aR,5R,6R,6aR)-5-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yloxysulfonyl]-3-(3-methoxy-phenyl)-propionic acid methyl ester 、 (S)-3-[(3aR,5R,6R,6aR)-5-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yloxysulfonyl]-3-(3-methoxy-phenyl)-propionic acid methyl ester