Rhodium-Catalyzed C3-Selective Alkenylation of Substituted Thiophene-2-carboxylic Acids and Related Compounds
作者:Tomonori Iitsuka、Petra Schaal、Koji Hirano、Tetsuya Satoh、Carsten Bolm、Masahiro Miura
DOI:10.1021/jo4011969
日期:2013.7.19
thiophene-2-carboxylic acids can be achieved effectively via rhodium/silver-catalyzed oxidative coupling with alkenes, unaccompanied by decarboxylation. A wide range of substrates including brominated thiophenecarboxylic acids and furan-2-carboxylic acids can be employed together with styrenes as well as acrylates. The present catalyst system is also applicable to ortho-alkenylation of benzoic acids.
噻吩-2-羧酸的区域选择性C3-烯基化反应可通过铑/银催化的与烯烃的氧化偶联而有效地实现,而脱羧反应则不伴随而来。包括溴化噻吩羧酸和呋喃-2-羧酸在内的多种底物可以与苯乙烯以及丙烯酸酯一起使用。本催化剂体系也可用于苯甲酸的正链烯基化。