A general method for the preparation of 2-substituted-4-oxo-3-quinolinecarboxylic acids
作者:John S. Kiely、Suchin Huang、Lawrence E. Lesheski
DOI:10.1002/jhet.5570260630
日期:1989.11
A general method for preparing 2-substituted-4-oxo-3-quinolinecarboxylic acids and 2-substituted-4-oxo-1,8-naphthyridine-3-carboxylic acids as new analogs in the quinolone class of antiinfectives has been developed. The reaction of a Grignard reagent in the presence of copper(I) iodide with the 4-oxo-3-quinolinecar-boxylic acid esters and 4-oxo-1,8-naphthyridine-3-carboxylic acid esters yields the
已经开发了制备2-取代的4-氧代-3-氧代喹啉羧酸和2-取代的4-氧代-1,8-萘啶-3-羧酸作为抗感染剂喹诺酮类的新类似物的一般方法。格氏试剂在碘化亚铜(I)存在下与4-氧代-3-喹啉car-羧酸酯和4-氧代-1,8-萘啶-3-羧酸酯的反应产生所需的2-取代基。2,3-双键的重新引入是通过3位苯硒化,氧化成亚硒氧化物和原位顺电离而实现的。根据2-取代基和3-羧酸基团之间的空间拥挤程度,可以在酸性或碱性条件下将酯水解为羧酸。