Synthesis, antibacterial, and DNA-PK evaluation of some novel 6-fluoro-7-(cyclic amino)-2-(thioxo or oxo)-3-substituted quinazolin-4-ones as structural analogues of quinolone and quinazolin-2,4-dione antibiotics
作者:Jacob T. Heppell、Jasim M. A. Al-Rawi
DOI:10.1007/s00044-015-1336-6
日期:2015.6
Quinolones, isothiazoloquinolone, and quinazolin-2,4-diones represent a series of potent antibacterial agents. In this investigation, a series of novel 6-fluoro-7-(cyclic amino)-1-ethyl-2-(thioxo or oxo)-3-substituted quinazolin-4-ones were synthesized from a 6,7-difluoro-1-ethyl-2-(thioxo or oxo) quinazolin-4-one parent by esterification or amidification of the 3-NH followed by nucleophilic aromatic substitution of the 7-fluoro atom with cyclic secondary amines. The resulting compounds were subsequently evaluated for antibacterial activity but were inactive against the tested bacterial strains. Nevertheless, moderate activity against DNA-PK was observed at 10 A mu M for a selection of compounds.