Structure-activity relationship studies of antiplasmodial cyclometallated ruthenium(II), rhodium(III) and iridium(III) complexes of 2-phenylbenzimidazoles
作者:Laa-iqa Rylands、Athi Welsh、Keletso Maepa、Tameryn Stringer、Dale Taylor、Kelly Chibale、Gregory S. Smith
DOI:10.1016/j.ejmech.2018.10.019
日期:2019.1
structure-activity relationships, a series of 2-phenylbenzimidazoles and their corresponding Ru(II), Ir(III) and Rh(III) cyclometallated complexes were synthesised and evaluated for antiplasmodial activity against the chloroquine-sensitive (NF54) strain of the human malaria parasite Plasmodium falciparum. Selected metal complexes were further screened against the multidrug-resistant (K1) strain. In general, the
苯并咪唑,如阿苯达唑,噻苯达唑和奥美拉唑对恶性疟原虫具有抗疟原虫活性,被广泛用作金属基药物研究的支架。与各种亲脂性和电子性能结合的取代基可以影响反-membrane相互作用并同时提高了生物活性。为了研究构效关系,合成了一系列的2-苯基苯并咪唑及其相应的Ru(II),Ir(III)和Rh(III)环金属化的配合物,并评估了其对氯喹敏感(NF54)菌株的抗疟原虫活性。人类疟原虫恶性疟原虫。进一步针对多药耐药性(K1)菌株筛选了选定的金属配合物。通常,2-苯基苯并咪唑配体显示出弱抗疟原虫活性(IC 50〜17.66-22.32μM),而在与任一钌,铱或铑的配位体的配位,观察到抗疟原虫活性的增强。发现新的环金属化复合物对两种寄生虫菌株均具有活性,IC 50值在低至亚微摩尔范围内(0.12-5.17μM)。另外,金属配合物对哺乳动物中国仓鼠卵巢(CHO)细胞具有相对较低的细胞毒性。