Synthesis and antimicrobial activity of some novel substituted pyridazin-3(2H)-ones containing 1,3,4-thiadiazole moiety
作者:Mohammed S. Sallam、Maher A. El-Hashash、Dalal B. Guirguis
DOI:10.1007/s00044-015-1492-8
日期:2016.2
novel 1,3,4-thiadiazol-4,5-dihydropyridazin-3(2H)-ones with expected antimicrobial activity have been synthesized. The synthetic protocol of the target compounds was accomplished by condensing β-aroylacrylic acid 1 with 2,5-diamino-1,3,4-thiadiazole 2 to afford the aza-Michael adduct 3. Subsequently, the obtained adduct 3 was cyclized to 4,5-dihydropyridazin-3(2H)-ones (4a–e) by reaction with selected
合成了一系列具有预期抗菌活性的新型1,3,4-噻二唑-4,5-二氢哒嗪-3(2 H)-。通过将β-芳酰基丙烯酸1与2,5-二氨基-1,3,4-噻二唑2缩合以提供氮杂-迈克尔加合物3来完成目标化合物的合成方案。随后,通过与选定的肼反应,将获得的加合物3环化为4,5-二氢哒嗪-3(2 H)-ones(4a – e)。此外,加合物3也用丙二酸二乙酯和乙酰乙酸乙酯处理,得到1,3,4-噻二唑并丁酰胺5和6,分别。后来的化合物进一步与(2 mol)的肼衍生物反应,生成取代的噻二唑并吡嗪3-3(2H)-(7a - c),(9a - c)和(10a - b)。