[EN] INDOLE DERIVATIVES AS 5-ALPHA-REDUCTASE INHIBITOR
申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:WO1993005019A1
公开(公告)日:1993-03-18
(EN) Indole derivatives of formula (I), or a salt thereof, which are useful as a testosteron 5$g(a)-reductase inhibitor.(FR) L'invention se rapporte à des dérivés d'indole représentés par la formule suivante (I), ou à un sel de ces dérivés, qui sont utiles comme inhibiteur de la testostérone 5$g(a)-réductase.
4-(Benzoylindolizinyl)butyric Acids; Novel Nonsteroidal Inhibitors of Steroid 5.ALPHA.-Reductase. III.
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.