Substitution of the Nitro Group with Grignard Reagents: Facile Arylation and Alkenylation of Pyridine <i>N</i>-Oxides
作者:Fang Zhang、Song Zhang、Xin-Fang Duan
DOI:10.1021/ol3026632
日期:2012.11.2
unprecedented substitution of a nitro group with aryl or alkenyl groups of Grignard reagents affords 2-aryl or alkenylpyridine N-oxides in modest to high yields with high chemoselectivity. This protocol allows a simple and clean synthesis of various 2-substituted pyridineN-oxides and the corresponding pyridine derivatives. Furthermore, straightforward one-pot iterative functionality of pyridineN-oxides could