Rational design and synthesis of novel dibenzo[b,d]furan-1,2,3-triazole conjugates as potent inhibitors of Mycobacterium tuberculosis
作者:Thirumal Yempala、Jonnalagadda Padma Sridevi、Perumal Yogeeswari、Dharmarajan Sriram、Srinivas Kantevari
DOI:10.1016/j.ejmech.2013.10.082
日期:2014.1
A series of novel dibenzo[b,d]furan-1,2,3-triazole conjugates, rationally designed by reorientation of dibenzo[b,d]furan pharmacophore and alkyl/aryl groups appended on 1,2,3-triazole core, were synthesized using click chemistry. The required key intermediate, 2-ethynyl dibenzo[b,d]furan 3 was prepared from dibenzofuran-2-carboxaldehyde using Corey–Fuchs reaction. Further reaction of 3 with various
通过重新定向二苯并[ b,d ]呋喃药效团和附加在1,2,3-三唑核上的烷基/芳基进行合理设计的一系列新颖的二苯并[ b,d ]呋喃-1,2,3-三唑共轭物,使用点击化学合成。所需的关键中间体2-乙炔基二苯并[ b,d ]呋喃3是使用Corey-Fuchs反应由二苯并呋喃-2-羧醛制备的。在铜催化剂的存在下,3与各种烷基/芳基叠氮化物的进一步反应以优异的产率产生了1,2,3-三唑共轭物。评价所有新化合物的体外抗分枝杆菌活性结核分枝杆菌H37Rv(ATCC27294)产生5a(MIC:1.56μg / mL),5d(MIC:0.78μg/ mL)和5f(MIC:0.78μg/ mL)作为有希望的铅类似物。在这三种化合物中,1-(4-溴苄基)-4-(二苯并[ b,d ]呋喃-2-基)-1 H -1,2,3-三唑(5f)成为最有前途的抗结核药物对HEK-293T细胞系的细胞毒性最低(选择性指数:≫25)。