metal-free approach for the synthesis of 3-aryl-2-substituted quinolines and 4-arylacridines has been developed via the 1,3-dipolar cycloaddition reactions of arynes with N-oxides. Reactions of various 2-substitued quinolineN-oxides with ortho-(trimethylsilyl)aryltriflates in the presence of KF gave 3-(2-hydroxyaryl)quinoline derivatives in good yields. Acridine N-oxides also reacted with arynes to
Facile One-Pot Direct Arylation and Alkylation of Nitropyridine <i>N</i>-Oxides with Grignard Reagents
作者:Fang Zhang、Xin-Fang Duan
DOI:10.1021/ol202597b
日期:2011.11.18
Facile arylation and alkylation of nitropyridine N-oxides were developed through the reactions of Grignardreagents with nitropyridine N-oxides. For the same 4-nitropyridine N-oxide, arylation occurred at the 2- (or 6-) position, whereas alkylation occurred at the 3-position in an adjustably site-selective manner. The cooperative action of the two groups was discovered in the reactions of 3-nitropyridine