Partial GABAA Receptor Agonists. Synthesis and in Vitro Pharmacology of a Series of Nonannulated Analogs of 4,5,6,7-Tetrahydroisoxazolo[4,5-c]pyridin-3-ol
作者:Bente Frolund、Uffe Kristiansen、Lotte Brehm、Annette B. Hansen、Povl Krogsgaard-Larsen、Erik Falch
DOI:10.1021/jm00017a014
日期:1995.8
5-(4-Piperidyl)isoxazol-3-ol (4-PIOL, 10), a structural analog of 4-aminobutanoic acid (GABA, 1) and the GABAA agonist 4,5,6,7-tetrahydroisoxazolo[5,4-c]pyridin-3-ol (THIP, 5), is a low-efficacy partial GABAA agonist. A number of compounds bioisosterically derived from 10, including 5-(4-piperidyl)isothiazol-3-ol (11), 3-(4-piperidyl)isoxazol-5-ol (12), 5-(1,2,3,6-tetrahydropyrid-4-yl)isoxazol-3-ol
5-(4-哌啶基)异恶唑-3-醇(4-PIOL,10),4-氨基丁酸(GABA,1)和GABAA激动剂4,5,6,7-四氢异恶唑的结构类似物[5,4 -c] pyridin-3-ol(THIP,5)是低效的部分GABAA激动剂。从10种生物立体异构体衍生的许多化合物,包括5-(4-哌啶基)异噻唑-3-醇(11),3-(4-哌啶基)异噻唑-5-醇(12),5-(1,2,3合成了1,6-四氢吡啶-4-基)异噻唑-3-醇(13)和5-(1,2,3,6-四氢吡啶-4-基)异噻唑-3-醇(14) GABAA受体配体。尽管这些化合物均未显着影响GABAB受体的结合或GABA的吸收,但它们在低微摩尔范围内显示出对GABAA受体位点的亲和力。使用培养的大脑皮层神经元和全细胞膜片钳技术,这些化合物相对于完整GABAA激动剂的功效,测定了异胍卡因(8)(20 microM)。11的相对功效比10(IC50 =