“Base Effect” in the Auto-Tandem Palladium-Catalyzed Synthesis of Amino-Substituted 1-Methyl-1<i>H</i>-α-carbolines
作者:Ashok K. Yadav、Stefan Verbeeck、Steven Hostyn、Philippe Franck、Sergey Sergeyev、Bert U. W. Maes
DOI:10.1021/ol400064r
日期:2013.3.1
An auto-tandem Pd-catalyzed process consisting of an intramolecular direct arylation and an intermolecular Buchwald–Hartwig reaction for C-ring amino-substituted 1-methyl-1H-α-carboline synthesis has been developed. A mechanistic study of the direct arylation reaction revealed a rate effect of the inorganic base on the C–H activation step (“base effect”). The amines, reagents in the tandem protocol
已经开发了一种自动串联的Pd催化方法,该方法由分子内直接芳基化和分子间Buchwald-Hartwig反应组成,用于C环氨基取代的1-甲基-1 H -α-咔啉合成。直接芳基化反应的机理研究揭示了无机碱对CH活化步骤的速率影响(“碱效应”)。串联协议中的胺,试剂似乎对直接芳基化有相似的作用。