Abstract The directC-3 alkynylation of indolizines with (2,2-dibromovinyl)arenes in the presence of palladium catalyst has been developed. This novel protocol showed wide substrate scope with respect to both indolizines and dibromoalkenes. Also this method was characterized with high efficiency and good functional group tolerance. GRAPHICAL ABSTRACT
Direct Palladium-Catalyzed Alkynylation of N-Fused Heterocycles
作者:Ilya V. Seregin、Victoria Ryabova、Vladimir Gevorgyan
DOI:10.1021/ja072718l
日期:2007.6.1
The first example of direct C−H alkynylation of electron-rich heteroaromatics has been demonstrated. This mild, simple, and general method allows for the efficient synthesis of diverse alkynyl heterocycles. Kinetic isotope effect studies support an electrophilic substitution pathway for this transformation.