Rearrangement of quaternary 6-aryl-2-methyl-3(5)-nitropyridinium salts was used for the synthesis of unsymmetrical nitrobiaryls. The starting nitropyridines were obtained by a three-component one-pot synthesis, two-step Hantzsch synthesis using nitro ketones, and by cyclocondensation of acylpyruvates with enamines derived from nitroacetone and nitroacetophenones.
6-芳基-2-甲基-3(5)-
硝基吡啶季
铵盐的重排用于合成不对称的硝基联芳基。起始的
硝基吡啶是通过三组分一锅合成,使用硝基酮的两步Hantzsch合成以及酰基
丙酮酸酯与衍生自硝基
丙酮和硝基
苯乙酮的烯胺的环缩合反应而获得的。