Discovery and SAR studies of 2-alkyl-3-phenyl-2,4,5,6,7,8-hexahydropyrazolo[3,4-d]azepines as 5-HT7/2 inhibitors leading to the identification of a clinical candidate
作者:Curt A. Dvorak、Dale A. Rudolph、Diane Nepomuceno、Lisa Dvorak、Brian Lord、Ian Fraser、Pascal Bonaventure、Timothy Lovenberg、Nicholas I. Carruthers
DOI:10.1016/j.bmcl.2020.127669
日期:2021.1
report here the synthesis and characterization of a dual 5-HT7 5-HT2 receptor antagonist 3-(4-Fluoro-phenyl)-2-isopropyl-2,4,5,6,7,8-hexahydro-1,2,6-triaza-azulene (4j). 4j is a high affinity 5-HT7 and 5-HT2A receptor ligand having a pKi = 8.1 at both receptors. It behaves as an antagonist in an in vitro functional assay for 5-HT2A and as an inverse agonist in an in vitro functional assay for 5-HT7. In
我们在这里报告了双重5-HT 7 5-HT 2受体拮抗剂3-(4-氟-苯基)-2-异丙基-2,4,5,6,7,8-hexahydro-1的合成和表征2,6-三氮杂氮烯(4j)。4j是在两个受体上均具有pK i= 8.1的高亲和力5-HT 7和5-HT 2A受体配体。它在5-HT 2A的体外功能测定中起拮抗剂作用,在5-HT 7的体外功能测定中起反向激动剂作用。在经过验证的中心5-HT 7体内模型中大鼠体内的活性,阻断5-羧酰胺基色胺(5-CT)引起的体温过低,4j显示了低剂量(ED 50 = 0.05 mg / kg,po,1 h)的功效,观察到最大剂量为0.3 mg / kg po的功效。相应的血浆浓度约为27 ng / ml。在经过验证的体内中心5-HT 2A活性模型中,2,5-二甲氧基-4-碘安非他明(DOI)引起的小鼠头部抽搐的阻滞,4j显示了低剂量的ED 50 = 0.3 mg /