r-3,c-7-dibenzoyloxy-c-5-(tert-butyldimethylsilyl)oxycycloheptene 、
丙二酸二甲酯 在
palladium diacetate 、 sodium hydride 、
2,2'-双(二苯基氧膦)-1,1'-联萘 作用下,
以
四氢呋喃 为溶剂,
反应 12.0h,
生成 2-[(1R,4S,6S)-4-Benzoyloxy-6-(tert-butyl-dimethyl-silanyloxy)-cyclohept-2-enyl]-malonic acid dimethyl ester 、 2-[(1S,4R,6R)-4-Benzoyloxy-6-(tert-butyl-dimethyl-silanyloxy)-cyclohept-2-enyl]-malonic acid dimethyl ester 、 2-[(1R,5R,7R)-7-Benzoyloxy-5-(tert-butyl-dimethyl-silanyloxy)-cyclohept-2-enyl]-malonic acid dimethyl ester 、 2-[(1S,5S,7S)-7-Benzoyloxy-5-(tert-butyl-dimethyl-silanyloxy)-cyclohept-2-enyl]-malonic acid dimethyl ester