Construction of challenging and important all-carbon quaternary centers has received growing attention. Herein, with oxalates as activating groups for tertiary alcohols, we report photoredox-catalyzed gem-difluoroallylation to construct all-carbon quaternary centers enabled by efficient tertiary radical addition to α-trifluoromethyl alkenes. This transformation shows good functional group tolerance
建设具有挑战性和重要意义的全碳第四元中心越来越受到关注。在此,我们以
草酸盐作为叔醇的活化基团,报道了光氧化还原催化的偕二
氟烯丙基化,通过对 α-三
氟甲基烯烃的高效叔自由基加成来构建全碳季中心。这种转变对 α-三
氟甲基烯烃和
草酸盐都显示出良好的官能团耐受性。此外,该策略还成功地应用于在改良条件下由相应的富电子偕二
氟烯烃和
草酸叔烷基
铯合成单
氟烯烃。