2,2-Difluorovinylzinc chloride–TMEDA complex, readily prepared from 1,1-difluoroethylene, undergoes the palladium-catalyzed coupling reaction with aryl halides to afford β,β-difluorostyrenes in high yield. This reaction not only proceeds smoothly with sterically hindered triflates and halides including chlorides, but also exhibits excellent chemoselectivities for multi-halogenated substrates. The intermediary TMEDA complex was found to be thermally stable and storable.
2,2-二
氟乙烯锌氯–TME
DA复合物可通过1,1-二
氟乙烯方便制备,能够与芳基卤化物进行
钯催化的偶联反应,生成β,β-二
氟苯乙烯,并具有高产率。该反应不仅能够顺利进行,适用于空间位阻较大的三
氟甲基和卤化物(包括
氯化物),而且对多卤素化底物表现出优异的
化学选择性。中间体TME
DA复合物被发现具有热稳定性和可储存性。