2-{3-[2-(2-ethoxycarbonyl-3-oxobutyl)phenyl]prop-2-ynyl}-2-(2-methylallyl)malonic acid dimethyl ester                                                                                                                                                              在
                                                                                                                                                                                 
(S)-(-)-5,5-双(二苯膦基)-4,4-双-1,3-苯并间二氧杂环戊烯   、                                                                                                  bis(1,5-cyclooctadiene)rhodium(I) tetrafluoroborate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 16.0h,
                                                                                                                生成                                                 (-)-3a,5a-dimethyl-1,3a,4,5a,6,7-hexahydro-3H-5-oxacyclopenta[c]phenanthrene-2,2,6-tricarboxylic acid 6-ethyl ester 2,2-dimethyl ester   、                                                                                             (-)-3a,5a-dimethyl-1,3a,4,5a,6,7-hexahydro-3H-5-oxacyclopenta[c]phenanthrene-2,2,6-tricarboxylic acid 6-ethyl ester 2,2-dimethyl ester