Synthesis of 4-oxo-4<i>H</i>-quino[2,3,4-<i>i,j</i>][1,4]-benoxazine-5-carboxylic acid derivatives
作者:Daniel T. W. Chu、Robert E. Maleczka
DOI:10.1002/jhet.5570240228
日期:1987.3
The synthesis and antibacterial activity of 1-substituted amino-2-fluoro-4-oxo-4H-quino[2,3,4-i,j][1,4]benox-azine-5-carboxylic acid derivatives is described. Key steps in the synthesis include carbon homologation and two intramolecular nucleophilic displacement cyclization reactions to generate the 4-oxo-4H-quino[2,3,4-i,j]-[1,4]benoxazine-5-carboxylic acid nucleus.
描述了1-取代的氨基-2-氟-4-氧代-4H-喹[2,3,4-i,j] [1,4]苯氧-嗪-5-羧酸衍生物的合成和抗菌活性。合成的关键步骤包括碳同源性和两个分子内亲核取代环化反应,以生成4-oxo-4H-喹啉[2,3,4-i,j]-[1,4]苯恶嗪-5-羧酸核。