A- or B-Ring-substituted derivatives of androst-4-ene-3,6,17-trione as aromatase inhibitors. Structure-activity relationships
作者:Mitsuteru Numazawa、Mii Tachibana
DOI:10.1016/0039-128x(94)90051-5
日期:1994.10
alpha-Acetoxy-4-ene-3,6-dione steroid 2 was also prepared by the improved method involving the lead tetraacetate oxidation of androst-4-ene-3,6,17-trione (1). These steroids along with the 2-acetoxy-(11 and 12), 2-substituted 1-ene- (9 and 10), and 4-substituted (13-15) derivatives of compound 1 were evaluated as inhibitors of human placental aromatase. All the steroids, except the 2-acetoxy-1-ene 10
合成了2,2-二甲基雄烷-4-烯-3,6,17-三酮(5)及其4-甲氧基-(7)和4-羟基-(8)衍生物。还通过改进的方法制备了7α-乙酰氧基-4-烯-3,6-二酮类固醇2,该方法涉及将雄烷-4-烯-3,6,17-三酮(1)的四乙酸铅氧化。这些类固醇与化合物1的2-乙酰氧基-(11和12),2-取代的1-ene-(9和10)和4-取代的(13-15)衍生物一起被评估为人类胎盘芳香酶的抑制剂。除了2-乙酰氧基-1-烯10和2-β-乙酸酯11(由于其抑制活性差而无法确定其Ki值)外,所有类固醇均以竞争性方式阻断了芳香化酶。化合物5和8以及4-羟基类固醇15是有效的抑制剂(Ki:25-42 nM),而类固醇2、7、9、13和14的抑制活性相当好,分别为(Ki:160-810 nM)。在NADPH存在下,抑制剂2和15以时间依赖性方式使酶失活,而2,3-二甲基衍生物5和8则没有。雄烯二酮阻止了灭活