Catalytic Carbon–Carbon Bond Activation of Saturated and Unsaturated Carbonyl Compounds via Chelate-Assisted Coupling Reaction with Indoles
作者:Nuwan Pannilawithana、Chae S. Yi
DOI:10.1021/acscatal.0c01245
日期:2020.5.15
promote a highly regioselective catalytic C–C bond activation reaction of saturated and unsaturated carbonyl compounds. The cationic Ru–H complex 1 was found to be an effective catalyst for mediating the coupling reaction of 1,2-disubstituted indoles with α,β-unsaturated aldehydes and ketones, in which the regioselective Cα–Cβ activation of the carbonyl substrates has been achieved in forming the 3-alkylindole
设计了螯合辅助策略,以促进饱和和不饱和羰基化合物的高度区域选择性催化C–C键活化反应。阳离子的Ru-H络合物1被认为是介导的1,2-二取代的具有α,β不饱和醛和酮的吲哚偶联反应,其中区域选择性C中的,有效的催化剂α -C β活化的羰基片在形成3-烷基吲哚产物中已经实现。用饱和醛和酮的吲哚的类似偶联反应直接导致在C α -C β羰基底物的裂解在形成3-alkylindole产品。1,2-二甲基吲哚与(E的偶联反应)-3-壬烯-2-酮和2-丙醇- d 8显示氘掺入的20-22%至两个α-和β-CH 2 3-alkylindole产物。1,2- dimethylinole与(的偶联反应ë)-3-壬烯-2-酮表现出对产品的α -碳(C最显著碳动力学同位素效应α = 1.046)。由1,2-二甲基吲哚与一系列对位取代的烯酮p -XC 6 H 4 CH = CHCOCH 3(X = OMe,Me,H,Cl,CF