A versatile difluorovinylation method: Cross-coupling reactions of the 2,2-difluorovinylzinc–TMEDA complex with alkenyl, alkynyl, allyl, and benzyl halides
作者:Tomohiro Ichitsuka、Tsuyoshi Takanohashi、Takeshi Fujita、Junji Ichikawa
DOI:10.1016/j.jfluchem.2014.12.003
日期:2015.2
2-difluorovinylzinc–TMEDA complex was prepared via a deprotonation–transmetallation sequence starting from commercially available 1,1-difluoroethylene. The complex thus formed was successfully applied to transition metal-catalyzed cross-coupling reactions with a wide range of organic halides, which led to the syntheses of 2,2-difluorovinyl compounds. On treatment with the difluorovinylzinc–TMEDA complex in the presence
通过去质子化-金属间转移序列,从可商购的1,1-二氟乙烯开始制备热稳定的2,2-二氟乙烯基锌-TMEDA复合物。如此形成的配合物已成功地用于过渡金属催化的与多种有机卤化物的交叉偶联反应,从而导致了2,2-二氟乙烯基化合物的合成。在适当的钯或铜催化剂存在下用二氟乙烯基锌-TMEDA复合物处理时,烯基,炔基,烯丙基和苄基卤化物会有效地进行二氟乙烯基化,从而得到1,1-二氟-1,3-二烯,1,1-二氟-1,3-烯炔,1,1-二氟-1,4-二烯和(3,3-二氟烯丙基)芳烃。