(3R,4S)-3-(allyloxy)-3-(buta-1,3-dien-2-yl)-4-((S)-2,2-dimethyl-1,3-dioxolan-4-yl)-1-(4-methoxyphenyl)azetidin-2-one 在
Grubbs catalyst first generation 作用下,
以
甲苯 为溶剂,
反应 12.0h,
以53%的产率得到(1S,4R)-1-[(4S)-2,2-dimethyl-1,3-dioxolan-4-yl]-2-(4-methoxyphenyl)-9-methylidene-5-oxa-2-azaspiro[3.5]non-7-en-3-one