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