The Role of Fluorine Substitution in Biphenyl Methylene Imidazole-Type CYP17 Inhibitors for the Treatment of Prostate Carcinoma
作者:Qingzhong Hu、Matthias Negri、Sureyya Olgen、Rolf W. Hartmann
DOI:10.1002/cmdc.201000065
日期:2010.6.7
previously identified lead compound Ref 1, a series of fluorine‐substituted biphenyl methylene imidazoles were designed, synthesized, and evaluated as CYP17 inhibitors to elucidate the influence of fluorine on in vitro and in vivo activity. It was found that meta‐fluoro substitution at the C ring improved activity, whereas ortho substitution decreased potency. Docking studies performed with our human CYP17
已经确定大多数前列腺癌的生长取决于雄激素刺激。因此,抑制细胞色素P450-17(CYP17)阻断雄激素的生物合成被认为是一种有前途的治疗方法。根据我们先前确定的先导化合物Ref 1,设计,合成和评估了一系列氟取代的联苯亚甲基咪唑,作为CYP17抑制剂,以阐明氟对体外和体内活性的影响。结果发现,在C环上的间氟取代提高了活性,而邻位取代则提高了活性。替代降低效力。用我们的人类CYP17同源性模型进行的对接研究表明,氟与Arg109,Lys231,His235和Glu305之间存在多极相互作用。不出所料,氟的引入也延长了血浆的半衰期。得到的SAR证实了蛋白质模型的可靠性。化合物9(IC 50 = 131 n M)被确定为一种强CYP17抑制剂,在大鼠中显示强效活性,高生物利用度和长血浆半衰期:12.8 h。