Design and synthesis of enantiomeric (R)- and (S)-copper(II) and diorganotin(IV)-based antitumor agents: Their in vitro DNA binding profile, cleavage efficiency and cytotoxicity studies
作者:Farukh Arjmand、Mohd. Muddassir、Imtiyaz Yousuf
DOI:10.1016/j.jphotobiol.2014.04.024
日期:2014.7
New chiral reduced Schiff base ligands (R)/(S)-2-(2-hydroxy-1-phenylethylaminomethyl)phenol (L), (R)/(S)-2-(benzylamino)-2-phenylethanol (L') and their Cu(II)/organotin(IV) complexes (1-4) were synthesized and thoroughly characterized. Preliminary in vitro DNA binding studies of (R)- and (S)-enantiomeric pairs of ligands L, L' and complexes 1-4 were carried out employing UV-vis, fluorescence and circular
新的手性还原席夫碱配体(R)/(S)-2-(2-羟基-1-苯基乙基氨基甲基)苯酚(L),(R)/(S)-2-(苄氨基)-2-苯基乙醇(L' )及其Cu(II)/ organotin(IV)配合物(1-4)进行了合成并进行了全面表征。对配体L,L'和(1-4)对映体对(R)和(S)对映体对进行了初步的体外DNA结合研究,采用紫外可见,荧光和圆二向色技术评估了它们的对映选择性DNA结合潜力,从而起到抗肿瘤化学治疗药物的作用。观察结果表明,与R-对映异构体形式和有机锡(IV)络合物2相比,Cu(II)配合物1的S-对映体与DNA的结合更亲和。这通过配体L和L的Kb和Ksv值进一步确定和(S)-/(R)-1-4配合物,与铜的R-对映异构体形式相比,它证明了铜配合物1的S-对映异构体呈倍数增加。这清楚地证明了S-对映异构体相对于R-对映异构体的手性偏好及其作为化学治疗剂的效力。进行了用pBR322质