4-(Benzoylindolizinyl)butyric Acids; Novel Nonsteroidal Inhibitors of Steroid 5.ALPHA.-Reductase. III.
作者:Kozo SAWADA、Satoshi OKADA、Akio KURODA、Shinya WATANABE、Yuki SAWADA、Hirokazu TANAKA
DOI:10.1248/cpb.49.799
日期:——
A novel series of indolizinebutyric acids with various benzoyl substituents was synthesized to develop nonsteroidal inhibitors of steroid 5α-reductase, and the structure-activity relationships in this series were studied. We previously reported the structure-activity relationships in a series of indolebutyric acids as well as the discovery of the novel nonsteroidal 5α-reductase inhibitor, FK143. We have now made other modifications to this compound to improve in vivo inhibitory activity. By altering the heterocyclic nucleus and changing the benzoyl substituent we have succeeded in identifying the strongly active compound, FK687, (S)-4-[1-[4-[[1-(4-isobutylphenyl)butyl]oxy]benzoyl]indolizin-3-yl]butyric acid, which displays strong in vitro inhibitory activity against the human enzyme and in vivo inhibitory activity against the castrated young rat model. This compound should be a useful agent for the treatment of benign prostatic hyperplasia.
合成了一系列具有不同苯甲酰取代基的吲唑啉丁酸,以开发非类固醇的类固醇5α-还原酶抑制剂,并研究了该系列的结构-活性关系。我们之前报道了吲哚丁酸系列的结构-活性关系以及新型非类固醇5α-还原酶抑制剂FK143的发现。现在,我们对该化合物进行了其他改进,以提高其体内抑制活性。通过改变杂环核和更改苯甲酰取代基,我们成功鉴定出了强活性化合物FK687,(S)-4-[1-[4-[[1-(4-异丁基苯)丁基]氧]苯甲酰]吲唑啉-3-基]丁酸,该化合物在体外表现出对人类酶的强抑制活性,并在去势幼鼠模型中显示出体内抑制活性。该化合物为治疗良性前列腺增生提供了有用的帮助。