2,5-降冰片二烯 、
(1R,5S,7S)-1-(10,10-dimethyl-3,3-dioxo-3-thia-4-azatricyclo[5.2.1.01,5]decan-4-yl)-2-butyn-1-one 、 alkaline earth salt of/the/ methylsulfuric acid 以
甲苯 为溶剂,
反应 12.0h,
以55%的产率得到(1R,2R,6S,7S)-5-[(1R,5S,7S)-10,10-dimethyl-3,3-dioxo-3lambda6-thia-4-azatricyclo[5.2.1.01,5]decane-4-carbonyl]-4-methyltricyclo[5.2.1.02,6]deca-4,8-dien-3-one