Synthesis and antibacterial activity of isomeric 6- and 7-acetyl-3-methyl-2-quinoxalinecarboxamide 1,4-dioxides
作者:John P. Dirlam、Joseph E. Presslitz
DOI:10.1021/jm00203a017
日期:1978.5
7-acetyl--3-methyl-2-quinoxalinecarboxamide 1,4-dioxides are reported together with a comparison of their antibacterial activity. The structural assignment of these 6- and7-acetyl isomers was based on NMR analysis of related mono-N-oxide derivatives, which were obtained by treatment of the quinoxaline 1,4-dioxides with acetic anhydride--acetic acid or trimethyl phosphite. The compounds were screened for in
报道了6-和7-乙酰基-3--3-甲基-2-喹喔啉羧酰胺1,4-二氧化物的合成,分离和结构测定,并比较了它们的抗菌活性。这些6-和7-乙酰基异构体的结构分配基于相关单-N-氧化物衍生物的NMR分析,该单N-氧化物衍生物是通过用乙酸酐-乙酸或亚磷酸三甲酯处理喹喔啉1,4-二氧化物获得的。筛选化合物针对大肠杆菌,霍乱沙门氏菌,多杀性巴斯德氏菌和化脓性链球菌的体外和体内活性。尽管发现这些异构体具有相似的活性,但在胃肠外给药时,7-乙酰基异构体在治疗上比6-乙酰基异构体更具活性。