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