Novel Steroidal Inhibitors of Human Cytochrome P45017.alpha.-Hydroxylase-C17,20-lyase): Potential Agents for the Treatment of Prostatic Cancer
作者:Gerard A. Potter、S. Elaine Barrie、Michael Jarman、Martin G. Rowlands
DOI:10.1021/jm00013a022
日期:1995.6
Steroidal compounds having a 17-(3-pyridyl) substituent together with a 16,17-double bond have been synthesized, using a palladium-catalyzed cross-coupling reaction of a 17-enol triflate with diethyl(3-pyridyl)borane, which are potent inhibitors of human testicular 17 alpha-hydroxylase-C17,20-lyase. The requirement for these structural features is stringent: compounds having 2-pyridyl (9), 4-pyridyl
使用17-烯丙基三氟甲磺酸酯与二乙基(3-吡啶基)硼烷的钯催化交叉偶联反应,合成了具有17-(3-吡啶基)取代基和16,17-双键的甾族化合物。是人睾丸17α-羟化酶-C17,20-裂解酶的有效抑制剂。这些结构特征的要求是严格的:具有2-吡啶基(9),4-吡啶基(10)或2-吡啶基甲基(11)取代基而不是3-吡啶基取代基的化合物是弱抑制剂或非抑制剂。还原16,17-双键可得到17个β-吡啶基衍生物,减弱了3-吡啶基取代的效价(3-> 27;裂解酶的IC50,2.9-> 23 nM),但被4-吡啶基取代基提高了目前(10-> 28; IC50 1 microM-> 53 nM)。相反,甾体骨架的AC环上的多种取代方式可提供具有与天然底物孕烯醇酮和孕酮在结构上最密切相关的抑制剂,分别具有17-(3-吡啶基)androsta-5,16-dien-3 beta- ol(3,Kiapp <1 nM;裂解酶的IC50,2