(-)-(1R,2S,5R)-2-cyano-2-(2-ethynylbenzyl)pent-4-enoic acid 2-isopropyl-5-methyl-cyclohexyl ester 在
Grubbs catalyst first generation 作用下,
以
二氯甲烷 为溶剂,
生成 (6R)-6-cyano-9-vinyl-6,7-dihydro-5H-benzocycloheptene-6-carboxylic acid (1R,2S,5R)-2-isopropyl-5-methyl-cyclohexyl ester 、 (6S)-6-cyano-9-vinyl-6,7-dihydro-5H-benzocycloheptene-6-carboxylic acid (1R,2S,5R)-2-isopropyl-5-methyl-cyclohexyl ester