Synthesis of New 2-Thio-[1,2,4]triazolo[1,5-c]quinazoline Derivatives and Its Antimicrobial Activity
作者:Lyudmila Antipenko、Alexander Karpenko、Sergey Kovalenko、Andrew Katsev、Elena Komarovska-Porokhnyavets、Vladimir Novikov、Aleksey Chekotilo
DOI:10.1248/cpb.57.580
日期:——
A series of novel ([1,2,4]triazolo[1,5-c]quinazolin-2-ylthio)carboxylic acids 2a-d and esters 3a-l were synthesized and evaluated for antimicrobial activity. Alkylation of potassium 2-thio-[1,2,4]triazolo[1,5-c]quinazoline 1 with halogenocarboxylic acids and its esters proceeded S-regioselectively. During acid catalyzed esterification of 2a-c, degradation of the pyrimidine ring was observed. The structures
合成了一系列新颖的([1,2,4]三唑并[1,5-c]喹唑啉-2-基硫基)羧酸2a-d和酯3a-1,并评估了其抗菌活性。2-硫代-[1,2,4]三唑并[1,5-c]喹唑啉1与卤代羧酸及其酯的烷基化反应在S-区域选择性进行。在酸催化的2a-c酯化过程中,观察到嘧啶环的降解。通过FT-IR,(1)H-和(13)C-NMR,电子冲击质谱(EI-MS)和LC-MS光谱数据阐明了化合物的结构。测试了合成化合物对大肠杆菌,铜绿假单胞菌,黑曲霉,黄杆菌分枝杆菌,白色念珠菌和Tenduis的抗菌和抗真菌活性。酸2a和2c对白色念珠菌具有显着活性,