indoles and allyl acetates/alcohols. The reaction tolerates many functional groups and selectively affords the branched C3-allylated products from both α- and γ-substituted allyl substrates. It takes the advantage of the hemilabile character of the P∧N ligand. The C(sp2)–C(sp3) coupling operates via a Au(I)/Au(III) redox cycle and involves a dicationic π-allyl Au(III) complex as a key intermediate. In this
发现 (MeDalphos)AuCl 复合物可有效催化
吲哚和
乙酸烯丙酯/醇的交叉偶联。该反应耐受许多官能团,并选择性地从 α- 和 γ- 取代的烯丙基底物提供支链 C3 烯丙基化产物。它利用了 P ∧ N
配体的半相容性。C(sp 2 )–C(sp 3 ) 偶联通过 Au(I)/Au(III) 氧化还原循环进行,并涉及作为关键中间体的双阳离子 π-烯丙基 Au(III) 配合物。在这种情况下,烯丙基部分采用不对称的 σ + π-配位模式,如 NMR 光谱和密度泛函理论 (DFT) 计算所证实的那样。