三甲基硅烷化重氮甲烷 、 (E)-4-((1R,5S,7S)-10,10-Dimethyl-3,3-dioxo-3λ
6-thia-4-aza-tricyclo[5.2.1.0
1,5]dec-4-yl)-4-oxo-but-2-enoic acid ethyl ester 以
正己烷 、
甲苯 为溶剂,
生成
(4R,5S)-5-((1R,5S,7S)-10,10-Dimethyl-3,3-dioxo-3λ6-thia-4-aza-tricyclo[5.2.1.01,5]decane-4-carbonyl)-4,5-dihydro-1H-pyrazole-4-carboxylic acid ethyl ester 、 (4S,5R)-5-((1R,5S,7S)-10,10-Dimethyl-3,3-dioxo-3λ
6-thia-4-aza-tricyclo[5.2.1.0
1,5]decane-4-carbonyl)-4,5-dihydro-1H-pyrazole-4-carboxylic acid ethyl ester