Acrylic acid (1S,2R,4R)-7,7-dimethyl-1-(naphthalene-1-sulfonylmethyl)-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 (1R,2S,4R)-Bicyclo[2.2.1]hept-5-ene-2-carboxylic acid (1S,2R,4R)-7,7-dimethyl-1-(naphthalene-1-sulfonylmethyl)-bicyclo[2.2.1]hept-2-yl ester 、 (1R,2S,4R)-Bicyclo[2.2.1]hept-5-ene-2-carboxylic acid (1S,2R,4R)-7,7-dimethyl-1-(naphthalene-1-sulfonylmethyl)-bicyclo[2.2.1]hept-2-yl ester 、
(1R,2S,4R)-Bicyclo[2.2.1]hept-5-ene-2-carboxylic acid (1S,2R,4R)-7,7-dimethyl-1-(naphthalene-1-sulfonylmethyl)-bicyclo[2.2.1]hept-2-yl ester 、 (1R,2S,4R)-Bicyclo[2.2.1]hept-5-ene-2-carboxylic acid (1S,2R,4R)-7,7-dimethyl-1-(naphthalene-1-sulfonylmethyl)-bicyclo[2.2.1]hept-2-yl ester