(±)-2-Aryl-2,3-dihydro-4(1H)-quinolinones by a tandem reduction-Michael addition reaction
作者:Richard A. Bunce、Baskar Nammalwar
DOI:10.1002/jhet.624
日期:2011.5
(±)‐2‐aryl‐2,3‐dihydro‐4(1H)‐quinolinones has been developed from chalcones prepared from 2′‐nitroacetophenone and a series of substituted benzaldehydes. The cyclization sequence is initiated by reduction of the nitro group under dissolving metal conditions using iron powder in concentrated hydrochloric acid. Milder conditions, using acetic acid or acetic acid–phosphoric acid as the reaction medium, were less
由2'-硝基苯乙酮和一系列取代的苯甲醛制备的查耳酮已开发出(±)-2-芳基-2,3-二氢-4(1 H)-喹啉酮的有效合成方法。环化顺序是通过使用铁粉在浓盐酸中溶解金属条件下的硝基还原而引发的。使用乙酸或乙酸-磷酸作为反应介质的较温和条件不太令人满意。介绍了程序细节以及机理讨论和反应优化研究。J.杂环化学。(2011)。