Synthesis of 4-hydroxyquinolin-2(1<i>H</i>)-one analogues and 2-substituted quinolone derivatives
作者:Jae-Chul Jung、Young-Jo Jung、Oee-Sook Park
DOI:10.1002/jhet.5570380109
日期:2001.1
4-hydroxyquinolone and 2-substituted quinolone compounds from simple benzoic acid derivatives was demonstrated. The synthetic strategies involve the use of well known ethyl acetoacetate synthesis, malonic ester synthesis and reductive cyclization. The key intermediates were keto esters 4a-e, which could be transformed to 4-hydroxyquinolones 5a,b or 2-substituted quinolone ethyl esters 6a-c depending on the