The reaction of (chlorocarbonyl)phenyl ketene with enaminones: A novel synthesis of some 5-acyl-4-hydroxy-2-(1<i>H</i>)-pyridinones and 7-hydroxy-5-oxo-1,4-diazepin derivative
作者:Mehdi Abaszadeh、Hassan Sheibani、Kazem Saidi
DOI:10.1002/jhet.14
日期:2009.1
A series of substituted 5-acyl-4-hydroxy-2-(1H)-pyridinone derivatives has been prepared in a one-step procedure from condensation of (chlorocarbonyl)phenyl ketene with some enaminones which were prepared from 1,3-diketones, such as 2,4-pentanedione, 1-phenyl-1,3-butanedione, and ethyl acetoacetate in boiling toluene as a solvent. A mechanism is presented to account for the formation of the products
从(氯羰基)苯基乙烯酮与一些由1,3-二酮制得的烯胺缩合的一步法制得了一系列取代的5-酰基-4-羟基-2-(1 H)-吡啶酮衍生物, 如2,4-戊二酮,1-苯基-1,3-丁二酮和在沸腾的甲苯中作为溶剂的乙酰乙酸乙酯。提出了一种机制来说明产品的形成。整个序列提供了制备3,4,5,6-四取代的简单有效途径2-(1 H)-吡啶酮产率高至优异,且实验时间短。J.杂环化学,(2009)。