反应详情

3-Ethyl-6-(3,4-dimethoxyphenyl)-3-hexenyl bromide [V; Ar is 3,4-(CH3O)2C6H3, R is C2H5 ] was prepared from 16 g. of 2-(3,4-dimethoxyphenyl)ethyl 1-ethylcyclopropyl carbinol (Preparation B4), 16.8 g. of phosphorus tribromide, 16.8 g. of lithium bromide and 17.6 g. of zinc bromide according to the procedure given above in Preparation C1. The product was used directly in the succeeding step (Preparation D4) without isolation.