3-(3-Chloro-phenyl)-3-methanesulfonyloxy-2-[(3aR,6R,6aR)-6-methoxy-2,2-dimethyl-dihydro-furo[2,3-d][1,3]dioxol-(5Z)-ylidenemethyl]-propionic acid ethyl ester 在
1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下,
以
甲苯 为溶剂,
反应 3.0h,
生成 (4Z,6E) 6-carbethoxy-5,6,7-trideoxy-1,2-O-isopropylidene-3-O-methyl-7-(3-chlorophenyl)-β-L-threo-hept-4,6-dienofuranose 、 (4Z,6Z) 6-carbethoxy-5,6,7-trideoxy-1,2-O-isopropylidene-3-O-methyl-7-(3-chlorophenyl)-β-L-threo-hept-4,6-dienofuranose