Discovery and Optimization of Novel Antagonists to the Human Neurokinin-3 Receptor for the Treatment of Sex-Hormone Disorders (Part I)
摘要:
Neurokinin-3 receptor (NK3R) has recently emerged as important in modulating the tonic pulsatile gonadotropin-releasing hormone (GnRH) release. We therefore decided to explore NK3R antagonists as therapeutics for sex-hormone disorders that can potentially benefit from lowering GnRH pulsatility with consequent diminished levels of plasma luteinizing hormone (LH) and correspondingly attenuated levels of circulating androgens and estrogens. The discovery and lead optimization of a novel N-acyl-triazolopiperazine NK3R antagonist chemotype achieved through bioisosteric lead change from the high-throughput screening (HTS) hit is described. A concomitant improvement in the antagonist bioactivity and ligand lipophilic efficiency (LLE) parameter were the principal guidelines in the lead optimization efforts. Examples of advanced lead analogues to demonstrate the amenability of this chemotype to achieving a suitable pharmacokinetic (PK) profile are provided as well as pharmacokinetic-pharmacodynamic (PKPD) correlations to analyze the trends observed for LH inhibition in castrated rats and monkeys that served as preliminary in vivo efficacy models.
[EN] NOVEL N-ACYL-(3-SUBSTITUTED)-(8-SUBSTITUTED)-5,6-DIHYDRO- [1,2,4]TRIAZOLO[4,3-a]PYRAZINES AS SELECTIVE NK-3 RECEPTOR ANTAGONISTS, PHARMACEUTICAL COMPOSITION, METHODS FOR USE IN NK-3 RECEPTOR-MEDIATED DISORDERS<br/>[FR] NOUVELLES N-ACYL-(3-SUBSTITUÉES)-(8-SUBSTITUÉES)-5,6-DIHYDRO- [1,2,4]TRIAZOLO[4,3-A]PYRAZINES UTILISÉES EN TANT QU'ANTAGONISTES SÉLECTIFS DES RÉCEPTEURS NK-3, COMPOSITION PHARMACEUTIQUE, MÉTHODES D'UTILISATION DANS LE TRAITEMENT DE TROUBLES MÉDIÉS PAR LES RÉCEPTEURS NK-3
申请人:EUROSCREEN SA
公开号:WO2014154895A1
公开(公告)日:2014-10-02
The present invention relates to novel compounds of Formula (I), and their use in therapeutic treatments.
本发明涉及公式(I)的新化合物,以及它们在治疗治疗中的应用。
[EN] SYNTHESIS OF 3-METHYL-1,2,4-THIADIAZOLE-5-CARBOHYDRAZIDE OR OF THE METHYL-d3 DEUTERATED FORM THEREOF<br/>[FR] SYNTHÈSE DE 3-MÉTHYL-1,2,4-THIADIAZOLE-5-CARBOHYDRAZIDE OU DE SA FORME DEUTÉRÉE MÉTHYL-D3
申请人:OGEDA SA
公开号:WO2020128003A1
公开(公告)日:2020-06-25
The present invention relates to a method of synthesis of compound (I), wherein R1 represents methyl or methyl-d3, thus corresponding to 3-methyl-1,2,4-thiadiazole-5-carbohydrazide or to the methyl-d3 deuterated form thereof. These compounds are useful as key intermediates in the synthesis of pharmaceutical compounds, especially fezolinetant and deuterated fezolinetant.
target compound exhibited promising inhibitory activity against NK3R (IC = 430.60 nM) with excellent membrane permeability (Papp, A-B = 37.6 × 10 cm/s, ER < 1) and oral bioavailability (F% = 93.6%). Our in vivo studies demonstrated that was orally active, efficacious, and well-tolerated in ovariectomy (OVX) model to suppress blood luteinizing hormone levels, which suggests that 16x is a viable lead compound