A highly regio- and stereo-selective method for the introduction of a bromo- (or chloro-) difluoromethylene group into various unsaturated systems is described. The key step is the treatment of 1,1-difluoro-1-alken-3-ols with thionyl bromide (or chloride).
描述了用于将
溴(或
氯)二
氟亚甲基引入各种不饱和体系中的高度区域选择性和立体选择性的方法。关键步骤是用亚
硫酰
溴(或
氯化物)处理1,1-二
氟-1-链烯-3-醇。