作者:Santana, Catherine G.、Teoh, Yhin Sarah、Evarts, Madeline M.、Shezaf, Jonathan Z.、Krische, Michael J.
DOI:10.1021/acs.orglett.4c02642
日期:——
Formate-mediated reductive cross-couplings of vinyl halides with aryl iodides via palladium(I) catalysis occur with highly uncommon cine-substitution. The active dianionic palladium(I) catalyst, [Pd2I4][NBu4]2, is generated in situ from Pd(OAc)2, Bu4NI, and formate. Oxidative addition of aryl iodide followed by dissociation of the dimer provides the monomeric anionic T-shaped arylpalladium(II) species
甲酸盐介导的乙烯基卤化物与芳基碘化物通过钯 (I) 催化的还原叉偶联以非常罕见的 cine 取代发生。活性二离子钯 (I) 催化剂 [Pd2I4][NBu4]2 由 Pd(OAc)2、Bu4NI 和甲酸盐原位生成。芳基碘化物的氧化加成,然后二聚体解离,产生了单体阴离子 T 形芳钞 (II) 物种 [Pd(Ar)(I)2(NBu4)],它在乙烯基卤化物碳钯化后通过钯 (IV) 卡宾形成电影取代产物,氘标记实验证实了这一点。