Direct ortho-Arylation of N-Phenacylpyridinium Bromide by Palladium-Catalyzed C-H-Bond Activation

作者:Xu Jimin; Cheng Guolin; Su Deyong; Liu Yantao; Wang Xinyan*; Hu Yuefei
来源:Chemistry - A European Journal, 2009, 15(47): 13105-13110.
DOI:10.1002/chem.200901399

摘要

A novel palladium catalyzed direct ortho-arylation of N-phenacylpyridinium bromide was developed. The amazing N-phenacyl group regioselectively activates the C-H bond of pyridine and automatically departs from the arylated products. A kinetic isotope effect Study proved that the reaction went through a C-H-bond activation pathway and 2,6-diphenylpyridine was produced stepwise from 2-phenylpyridine.