When α-ketothioanilide reacts with o-phenylenediamine,there are two competing reactions.One is condensation which forms substituted quinoxaline and the other is substitution which forms substituted quinoxaline-2-thio...When α-ketothioanilide reacts with o-phenylenediamine,there are two competing reactions.One is condensation which forms substituted quinoxaline and the other is substitution which forms substituted quinoxaline-2-thione·By controlling the reaction condition,we can obtain either quinoxaline or quinoxaline-2-thione as the main product.展开更多
文摘When α-ketothioanilide reacts with o-phenylenediamine,there are two competing reactions.One is condensation which forms substituted quinoxaline and the other is substitution which forms substituted quinoxaline-2-thione·By controlling the reaction condition,we can obtain either quinoxaline or quinoxaline-2-thione as the main product.
