Synthesis of derivatives of (1S,2R)-1-phenyl-2-[(S)-1-aminopropyl]-N,N-diethylcyclopropanecarboxamide (PPDC) modified at the 1-aromatic moiety as novel NMDA receptor antagonists: the aromatic group is essential for the activity
作者:Yuji Kazuta、Ryuichi Tsujita、Kanako Yamashita、Shigeo Uchino、Shinichi Kohsaka、Akira Matsuda、Satoshi Shuto
DOI:10.1016/s0968-0896(02)00346-2
日期:2002.12
(1S,2R)-1-Phenyl-2-[(S)-1-aminopropyl]-N,N-diethylcyclopropanecarboxamide (PPDC. 4a). which is a conformationally restricted analogue of antidepressant milnacipran [(+/-)-1]. is a new class of potent noncompetitive NMDA receptor antagonists. A series of PPDC analogues modified at the 1-phenyl moiety. that is, the analogue 6 lacking 1-phenyl group, the 1-(fluorophenyl) analogues 4b,c.d. the 1-(methylphenyl) analogues 4e-g and the 1-(naphthyl) analogues 4h.i were synthesized. Analogue 6. lacking the 1-phenyl group. was completely inactive showing that the aromatic moiety is essential for the NMDA receptor binding. Among the analogues synthesized, the 1-o-fluorophenyl and 1-m-fluorophenyl analogues 4b and 4c showed potent affinities for the NMDA receptor [IC50=0.16+/-0.001 muM (4b), 0.15+/-0.02 muM (4c)]. which were improved to some extent compared to those of the parent compound PPDC (IC50=0.20+/-0.02 muM). On the other hand, compounds 4b and 4c showed none of the 5-HT-uptake inhibitors effect, while PPDC turned out to be a weak 5-HT-uptake inhibitor. (C) 2002 Elsevier Science Ltd. All rights reserved.
(1S,2R)-1-苯基-2-[(S)-1-氨基丙基]-N,N-二乙基环丙烷甲酰胺(PPDC. 4a),作为一种结构受限的抗抑郁药米那西普兰[(+/-)-1]类似物,是一种新型的强效非竞争性NMDA受体拮抗剂。在1-苯基部分进行了修饰的PPDC类似物系列被合成,即缺乏1-苯基基团的类似物6,1-(氟代苯基)类似物4b、c、d,1-(甲基苯基)类似物4e-g,以及1-(萘基)类似物4h、i。类似物6,缺乏1-苯基基团,完全表现出无活性,表明芳香基团对于NMDA受体的结合是必需的。在合成的类似物中,1-o-氟代苯基和1-m-氟代苯基类似物4b和4c显示了对NMDA受体的显著亲和力[IC50=0.16+/-0.001 μM(4b),0.15+/-0.02 μM(4c)],相较于母体化合物PPDC(IC50=0.20+/-0.02 μM)有所提高。另一方面,化合物4b和4c未显示出5-HT摄取抑制效应,而PPDC则表现出较弱的5-HT摄取抑制作用。(C)2002 Elsevier Science Ltd. 保留所有权利。