Acrylic acid (1S,2R,3S,4R)-3-benzhydryloxy-4,7,7-trimethyl-bicyclo[2.2.1]hept-2-yl ester 、
环戊二烯 在
二异丙氧基二氯化钛 作用下,
生成 (1S,2S,4S)-Bicyclo[2.2.1]hept-5-ene-2-carboxylic acid (1S,2R,3S,4R)-3-benzhydryloxy-4,7,7-trimethyl-bicyclo[2.2.1]hept-2-yl ester 、
(1S,2S,4S)-Bicyclo[2.2.1]hept-5-ene-2-carboxylic acid (1S,2R,3S,4R)-3-benzhydryloxy-4,7,7-trimethyl-bicyclo[2.2.1]hept-2-yl ester 、 (1S,2S,4S)-Bicyclo[2.2.1]hept-5-ene-2-carboxylic acid (1S,2R,3S,4R)-3-benzhydryloxy-4,7,7-trimethyl-bicyclo[2.2.1]hept-2-yl ester