N-Aryl-2-nitrosoanilines as intermediates in the synthesis of substituted phenazines from nitroarenes
作者:Andrzej Kwast、Karolina Stachowska、Adam Trawczyński、Zbigniew Wróbel
DOI:10.1016/j.tetlet.2011.09.113
日期:2011.11
N-Aryl-2-nitrosoanilines, available from the reaction of nitroarenes with anilide anions, undergo cyclization to furnish substituted phenazines. The reaction is promoted by potassium carbonate in methanol, N,O-bis(trimethylsilyl)acetamide (BSA) in aprotic solvents, and by acetic acid. The method is illustrated by the synthesis of 1-methoxyphenazine, a precursor of pyocyanine, starting from the appropriate
可从硝基芳烃与苯胺阴离子上反应得到的N-芳基-2-亚硝基苯胺经过环化以提供取代的吩嗪。该反应通过在甲醇中的碳酸钾,在非质子溶剂中的N,O-双(三甲基甲硅烷基)乙酰胺(BSA)和乙酸来促进。从合适的硝基芳烃-苯胺对开始,合成1-花青素的前体1-甲氧基吩嗪就说明了该方法。