<1-(2,3-dihydro-3,3-dimethylbenzo
thien-5-yl)ethyl>triphenylphosphonium bromide 、 对甲酰基苯甲酸甲酯 在
正丁基锂 作用下,
生成 methyl (Z)-4-<2-(2,3-dihydro-3,3-dimethylbenzothien-5-yl)-1-propenyl>benzoate 、 methyl (E)-4-<2-(2,3-dihydro-3,3-dimethylbenzothien-5-yl)-1-propenyl>benzoate