An iron-catalyzed intermolecular [4 + 2] cyclization of arylnitrones with geminal-substituted vinyl acetates was developed for the synthesis of 2,4-disubstituted quinolines in moderate to good yields with good functional group compatibilities. Preliminary mechanistic studies suggest a plausible iron-catalyzed C–H activation process under external-oxidant-free conditions.
已开发了
铁的芳基硝基酮与双取代的
乙酸乙烯酯的
铁催化的分子间[4 + 2]环化反应,用于合成2,4-二取代的
喹啉,产率中等至良好,且具有良好的官能团相容性。初步的机理研究表明,在无外部氧化剂的条件下,
铁催化的CH活化过程似乎是合理的。