(−)-5-Methyl-8-hydroxy-(di-n-propylamino)tetralin: A new 5-HT1A receptor antagonist
作者:Anne-Cécile Trillat、Monique Mathé-Allainmat、Béatrice Brémont、Isabelle Malagié、Christian Jacquot、Alain M. Gardier、Michel Langlois
DOI:10.1016/s0223-5234(98)80044-5
日期:1998.6
(+/-)-5-Me-8-OH-DPAT 4 was synthesized by a new synthetic pathway recently described by us. The (+)- and (-)-enantiomers 4 were prepared from the primary amine 8 by crystallisation of the (+)- and (-)-mandelic acid salts. The enantiomers reacted with propyl iodide and were demethylated by 48% HBr to the (+)- and (-)-4 compounds. These compounds had good affinity for 5-HT1A receptors (K-i = 32.9 +/- 0.8 and 45.6 +/- 2 nM, respectively) but lacked enantioselectivity. In contrast to 8-OH-DPAT, but similar to WAY 100635 and (+)-WAY 100135, the addition of GTP-gamma S did not decrease the affinity of these compounds for 5-HT1A receptors, suggesting a partial agonist or antagonist profile. Adenylyl cyclase assays with rat hippocampal membranes showed that (-)-4 was totally inactive as an agonist over a wide concentration range in contrast to (+)-4 which was a partial agonist. (-)-4 (1 and 10 mu M) shifted the concentration-effect curve for the inhibition by 8-OH-DPAT of forskolin-stimulated cyclic AMP production to the right (pA(2) = 7.6), demonstrating a competitive interaction between the two drugs. (C) Elsevier, Paris.
(+/-)-5-Me-8-OH-DPAT 4 是通过我们 recently described by us 的新合成途径合成的。分别由 (+)- 和 (-)-扁桃酸盐从初级胺 8 中析晶得到 (+)- 和 (-)-对映体4。它们与丙基碘反应,并通过48% HBr 脱甲基为 (+)- 和 (-)-4 化合物。这些化合物对 5-HT1A 受体表现出良好的亲和力(K-i分别为32.9 ± 0.8 nM 和45.6 ± 2 nM),但缺乏对映选择性。与 8-OH-DPAT 不同,但与 WAY 100635 和 (+)-WAY 100135 相似,添加 GTP-γ-S 并未降低这些化合物对 5-HT1A 受体的亲和力,表明其部分激动剂或拮抗剂特性。使用大鼠海马膜的腺苷酸环化酶测定显示,(-)-4 在广泛的浓度范围内完全不作为激动剂起作用,而 (+)-4 为部分激动剂。(-)-4 (1 和 10 μM) 将 8-OH-DPAT 抑制 forskolin 刺激的 cAMP 生成的浓度-效应曲线向右移动(pA(2) = 7.6),表明两种药物之间的竞争性相互作用。