A palladium-catalyzed defluorinative coupling reaction of gem-difluoroalkenes and aryl boronic acids affords ketones with an α-all-carbon quaternary center. The vinyl difluoromethylene motif serves as an in situ carbonyl precursor that is unprecedented in transition-metal-catalyzed coupling reactions. The key difluoroalkyl palladium(II) RCF2−PdII intermediate and related organometallic species were
钯催化的偕二
氟烯烃和芳基
硼酸的脱
氟偶联反应提供了具有 α-全碳季中心的酮。
乙烯基二
氟亚甲基基序用作原位羰基前体,这在过渡
金属催化的偶联反应中是前所未有的。关键的二氟烷基
钯 (II) RCF 2 -Pd II中间体和相关的有机
金属物种得到了充分表征。