Synthesis of Novel 1‐(5‐(Benzylsulfinyl)‐3‐methyl‐1,3,4‐thiadiazol‐2(3
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)‐ylidene)‐thiourea/urea Derivatives and Evaluation of Their Antimicrobial Activities
作者:Madhava Rao Mannam、Srimurugan S.、Pramod Kumar、R. S. Prasad K
DOI:10.1002/jhet.3611
日期:2019.8
A new series of 1‐(5‐(benzylsulfinyl)‐3‐methyl‐1,3,4‐thiadiazol‐2(3H)‐ylidene)‐thiourea/urea derivatives (1a–j) were designed and synthesized. For the first time, (i) a new process was developed for N‐methylation of 1,3,4‐thiadiazole moiety using dimethyl carbonate an environmentally benign reagent in presence of N,N,N′,N′‐tetramethylethylenediamine and (ii) the sulfide was selectively oxidized to
设计并合成了一系列新的1-(5-(苄基亚硫酰基)-3-甲基-1,3,4-噻二唑-2(3 H)-亚烷基)-硫脲/脲衍生物(1a – j)。首次中,(i)一个新的过程是为开发Ñ 1,3,4-噻二唑部分的-methylation使用碳酸二甲酯的对环境无害的试剂中的存在Ñ,Ñ,N' ,N '四甲基乙二胺和(ii )在温和的反应条件下,通过在乙酸水溶液中使用氯(g),将硫化物以较高的产率选择性地氧化为亚砜。合成的化合物(1a – j)对其抗菌活性进行了研究。被测化合物(1a – j)对革兰氏阳性和革兰氏阴性细菌均表现出中度至优异的抗菌活性。相同的化合物对选定的真菌菌株显示出良好的抗真菌活性。特别是化合物1b,1d,1h和1i与标准药物环丙沙星和氟康唑相比,已被证明具有抗菌和抗真菌活性的有前途的引线。1,3,4-噻二唑部分的存在对抗菌活性的显示具有重要作用。另外,根据获得的抗微生物活性数据,亚磺酰基和硫脲或脲官能团的存在均增强了活性。