Thiazole and imidazole derivatives have attracted medicinal chemists owing to their extensive biological activities. Present paper describes the synthesis of some new thiazolo imidazole derivatives. 4-Substituted phenacyl bromides were prepared from substituted acetophenones. The products were condensed with thiourea to obtain 2-amino-4-(4-substituted phenyl)thiazoles which on further reaction with 4-substituted phenacyl bromides resulted in 3,6-di(substituted phenyl)imidazo[2,1-b] thiazoles (3a-3i). The formation of all the compounds was established by spectral techniques like IR, 1H NMR and Mass spectral data. The title compounds were screened for their antimicrobial activity against Gram-positive bacteria S. aureus and B. subtilis, Gram-negative bacteria E. coli and K. pneumoniae and the fungal strains like A. niger, C. albicans and C. neoformans. The results indicated that the compounds coded 3a, 3c, 3g and 3i showed significant activity than the remaining compounds.
                                    噻唑和
咪唑衍
生物因其广泛的
生物活性而受到药物
化学家的关注。本文描述了一些新型
噻唑并
咪唑衍
生物的合成。从取代的
苯乙酮制备了4-取代的苯
乙酰溴。将产物与
硫脲缩合得到2-
氨基-4-(4-取代苯基)
噻唑,该化合物进一步与4-取代的苯
乙酰溴反应得到3,6-二(取代苯基)
咪唑并[2,1-b]
噻唑(3a-3i)。所有化合物的形成均通过IR、1H NMR和质谱数据等光谱技术确定。合成的化合物进行了抗菌活性筛选,包括对革兰氏阳性菌
金黄色葡萄球菌和大肠杆菌、革兰氏阴性菌
枯草芽孢杆菌和肺炎克雷伯菌以及真菌如黑曲霉、白色念珠菌和新形隐球菌的活性评价。结果表明,编码为3a、3c、3g和3i的化合物相对于其他化合物表现出更显著的活性。