Palladium catalyzed reaction of 2-alkynylanilines with allyl chlorides. Formation of 3-allylindoles
作者:Koji Iritani、Seijiro Matsubara、Kiitiro Utimoto
DOI:10.1016/s0040-4039(00)82047-x
日期:1988.1
Pd(II) catalyzed reaction of N-carbomethoxy-2-alkynylanilines with allylchlorides produces 2-alkyl-3-allyl-N-carbomethoxyindoles in the presence of oxirances; Aminopalladation of a N-carbomethoxy-2-alkynylaniline gives 3-(N-carbomethoxyindolyl)palladium intermediate, which regioselectively attacks on the γ position of chlorides to give 3-allyl-2-alkylindoles with concurrent regeneration of Pd(II)
Selectivity control in hydroarylation‐based C−H alkylation has been dominated by steric interactions. A conceptually distinct strategy that exploits the programmed switch in the C−H activation mechanism by means of cobalt catalysis is presented, which sets the stage for convenient C−H alkylations with unactivated alkenes. Detailed mechanistic studies provide compelling evidence for a programmable switch