Buta-2,3-dienoic acid (1R,2S,5R)-2-[1-(3,4-dimethyl-phenyl)-1-methyl-ethyl]-5-methyl-cyclohexyl ester 、
环戊二烯 在
二异丙氧基二氯化钛 作用下,
以
二氯甲烷 为溶剂,
反应 168.0h,
以85%的产率得到(1R,2S,4S)-3-Methylene-bicyclo[2.2.1]hept-5-ene-2-carboxylic acid (1R,2S,5S)-2-[1-(3,4-dimethyl-phenyl)-1-methyl-ethyl]-5-methyl-cyclohexyl ester