NOVEL THREE COMPONENT SYNTHESIS OF 1,2,4-TRIAZOLO[3,4-b]THIAZOLES AND THEIR ANTIMICROBIAL ACTIVITY
作者:K. Subrahmanya Bhat、B. Shivarama Holla
DOI:10.1080/10426500490459641
日期:2004.6
4-Triazolo[3,4-b]thiazole derivatives 5a–j have been synthesized by novel multi-component reaction of 2,4-dichloro-5-fluorophenacyl bromide (1), thiosemicarbazide (2), and aromatic carboxylic acids (4) using phosphorous oxychloride as the cyclizing agent. This reaction protocol is simple, efficient, and requires shorter reaction times in comparison to the conventional multi-step synthesis. The products
1,2,4-三唑并 [3,4-b] 噻唑衍生物 5a-j 已通过 2,4-二氯-5-氟苯甲酰溴 (1)、氨基硫脲 (2) 和芳香族化合物的新型多组分反应合成羧酸 (4) 使用三氯氧化磷作为环化剂。与传统的多步合成相比,该反应方案简单、高效,并且需要更短的反应时间。通过替代合成确定产物相同。筛选了所有化合物对一些细菌和真菌菌株的抗微生物活性。