A series of 5alpha-androst-3-enes and 3alpha,4alpha-epoxy-5alpha-androstanes were synthesized and tested for their abilities to inhibit aromatase in human placental microsomes. In these series the original C-17 carbonyl group was replaced by hydroxyl, acetyl and hydroxyimine groups. Inhibition kinetic analysis on the most potent steroid of these series revealed that it inhibits the enzyme in a competitive
合成了一系列的5α-雄烯-3-烯和3α,4α-环氧-
5α-雄烷酮,并测试了它们在人胎盘微粒体中抑制芳香化酶的能力。在这些系列中,原始的C-17羰基被羟基,乙酰基和羟基
亚胺基取代。对这些系列中最有效的类
固醇的抑制动力学分析表明,它以竞争性方式抑制酶(IC(50)= 6.5 microM)。获得的数据指出了研究类
固醇的D环中C-17羰基的重要性,这是达到最大芳香化酶抑制活性所需的结构特征。此外,似乎至少一个羰基(C-3或C-17)对于有效抑制芳香化酶是必不可少的。