4-(1-Benzoylindol-3-yl)butyric Acids and FK143: Novel Nonsteroidal Inhibitors of Steroid 5.ALPHA.-Reductase. (II).
作者:Kozo SAWADA、Satoshi OKADA、Patrick GOLDEN、Natsuko KAYAKIRI、Yuki SAWADA、Masashi HASHIMOTO、Hirokazu TANAKA
DOI:10.1248/cpb.47.481
日期:——
A novel series of indolebutyric acids with varying benzoyl substituents were synthesized to develop nonsteroidal inhibitors of steroid 5α-reductase. We previously reported the discovery of a novel nonsteroidal 5α-reductase inhibitor, FR119680, which had an IC50 value of 5.0 nM against the rat prostatic enzyme. However, this compound was not strongly active against the human prostatic enzyme. By further study of the structure-activity relationships we succeeded in producing the strongly active compound, FK143, 4-[3-[3-[bis(4-isobutylphenyl)-methylamino]benzoyl]-1H-indol-1-yl]butyric acid, with an IC50 value of 1.9 nM against the human enzyme. FK143 also has in vivo inhibitory activity against the castrated young rat model and it should therefore be an extremely useful agent for the treatment of benign prostatic hyperplasia.
合成了一系列新的吲哚丁酸,其苯甲酰取代基各不相同,以开发非甾体类的类固醇5α-还原酶抑制剂。我们之前报道了一种新型非甾体5α-还原酶抑制剂FR119680,其在大鼠前列腺酶上的IC50值为5.0 nM。然而,该化合物对人前列腺酶的活性并不强。通过进一步研究结构-活性关系,我们成功合成了强效化合物FK143,4-[3-[3-[双(4-异丁基苯)-甲胺]苯甲酰]-1H-吲哚-1-基]丁酸,其对人酶的IC50值为1.9 nM。FK143在去势年轻大鼠模型中也表现出体内抑制活性,因此它应该是治疗良性前列腺增生的极为有用的药物。