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