Anti-Markovnikov Hydroarylation of Unactivated Olefins via Pyridyl Radical Intermediates
作者:Allyson J. Boyington、Martin-Louis Y. Riu、Nathan T. Jui
DOI:10.1021/jacs.7b03262
日期:2017.5.17
The intermolecular alkylation of pyridine units with simple alkenes has been achieved via a photoredox radical mechanism. This process occurs with complete regiocontrol, where single-electron reduction of halogenated pyridines regiospecifically yields the corresponding radicals in a programmed fashion, and radical addition to alkene substrates occurs with exclusive anti-Markovnikov selectivity. This
Cross-couplings of alkyl halides with heteroaromatic halides, in water at room temperature
作者:Arkady Krasovskiy、Isabelle Thomé、Julien Graff、Valeria Krasovskaya、Paul Konopelski、Christophe Duplais、Bruce H. Lipshutz
DOI:10.1016/j.tetlet.2010.11.160
日期:2011.4
Zn-mediated, Pd-catalyzed cross-coupling reactions between heteroaromatic and alkyl halides can be done at room temperature in pure water using a commercially available Pd catalyst and PTS, a nanomicelle-forming amphiphile. Notably, zinc metal inserts selectively into a carbon sp(3)-halide bond, while palladium adds oxidatively to a carbon sp(2)-bond. (C) 2010 Elsevier Ltd. All rights reserved.