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
证明了一种由简单的
苯甲酸衍
生物制备
4-羟基
喹诺酮和2-取代的
喹诺酮化合物的通用合成方法。合成策略涉及使用众所周知的
乙酰乙酸乙酯合成,
丙二酸酯合成和还原环化。关键的中间体是
酮酯4a-e,根据反应条件的不同,可以将其转化为
4-羟基
喹诺酮5a,b或2-取代的
喹诺酮乙酯6a-c。制备了
4-羟基喹诺
酮类似物,并研究了
N-甲基-D-天冬氨酸(N
MDA)的体外活性。在这些衍
生物中,6,7-二
氟-
3-硝基-4-羟基喹啉-2(1 H)-一(9)表现出中等活动性。