Dehydrogenative and decarboxylative C–H alkynylation of heteroarenes catalyzed by Pd(II)–carbene complex
作者:Thupakula Parsharamulu、Police Vishnuvardhan Reddy、Pravin R. Likhar、Mannepalli Lakshmi Kantam
DOI:10.1016/j.tet.2015.02.020
日期:2015.4
The direct alkynylation of heteroarenes was accomplished with easily prepared Pd(II) carbene complex (Pd Cat.) by two complementary strategies. Pd Cat. catalysed cross-dehydrogenative coupling of terminal alkynes with heteroarenes was achieved in the first method and decarboxylative coupling of aryl propiolic acids with heteroarenes was investigated in the second method. Both the methodologies tolerate a broad variety of heteroarenes that include benzoxazoles, benzothiazoles, imidazole and benzimidazoles. (C) 2015 Elsevier Ltd. All rights reserved.