Scaffold hopping of fused piperidine-type NK3 receptor Title antagonists to reduce environmental impact Yamamoto, Koki; Inuki, Shinsuke; Ohno, Hiroaki; Oishi, Author(s) Shinya Citation Bioorganic & medicinal chemistry (2019), 27(10): 2019-2026 Issue Date 2019-05-15 URL http://hdl.handle.net/2433/241057 © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.; The full- text file will be made open to the public on 15 May 2021 in Right accordance with publisher's 'Terms and Conditions for Self- Archiving'.; この論文は出版社版でありません。引用の際 には出版社版をご確認ご利用ください。; This is not the published version. Please cite only the published version. Type Journal Article Textversion author Kyoto University Scaffold hopping of fused piperidine-type NK3 receptor antagonists to reduce environmental impact Koki Yamamoto, Shinsuke Inuki, Hiroaki Ohno, Shinya Oishi* Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan *Corresponding Author: Shinya Oishi, Ph.D. Graduate School of Pharmaceutical Sciences Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan Tel.: +81-75-753-4561; Fax: +81-75-753-4570, E-mail:
[email protected] ABSTRACT Neurokinin-3 receptor (NK3R) plays a pivotal role in the release of gonadotropin-releasing hormone in the hypothalamus–pituitary–gonadal (HPG) axis. To develop novel NK3R antagonists with less environmental toxicity, a series of heterocyclic scaffolds for the triazolopiperazine substructure in an NK3R antagonist fezolinetant were designed and synthesized. An isoxazolo[3,4-c]piperidine derivative exhibited moderate NK3R antagonistic activity and favorable properties that were decomposable under environmental conditions.