Novel adenosine A 1 receptor antagonists. Synthesis and structure–activity relationships of a novel series of 3-(2-cyclohexenyl-3-oxo-2,3-dihydropyridazin-6-yl)-2-phenylpyrazolo[1,5- a ]pyridines
作者:Satoru Kuroda、Atsushi Akahane、Hiromichi Itani、Shintaro Nishimura、Kieran Durkin、Yoshiyuki Tenda、Kazuo Sakane
DOI:10.1016/s0968-0896(99)00258-8
日期:2000.1
synthesized and evaluated for in vitro adenosine A1 and A2A receptor binding activities. Most of the cyclohexenyl derivatives (7a-e, 8a-s) were found to be potent adenosine A1 receptor antagonists. In a series of analogues of FR166124 (3a), alcohol 7c, nitrile 7e and amide derivatives (7d, 8c, 8r) were found to be more potent A1 antagonists with higher A2A/A1 selectivity than FR166124. Amongst them, 8r showed
合成了一系列新型的3-(2-环己烯基-3-氧代-2,3-二氢哒嗪-6-基)-2-苯基吡唑邻[1,5-a]吡啶,并对其体外腺苷A1和A2A受体进行了评估绑定活动。发现大多数环己烯基衍生物(7a-e,8a-s)是有效的腺苷A1受体拮抗剂。在FR166124(3a)的一系列类似物中,发现醇7c,腈7e和酰胺衍生物(7d,8c,8r)比FR166124更有效,具有更高的A2A / A1选择性。其中8r表现出相当高的水溶性(33.3 mg / mL),但低于FR166124的钠盐(> 200 mg / mL)。另外,FR166124在大鼠中通过口服和静脉给药都具有很强的利尿活性(最小有效剂量分别为0.1和0.032 mg / kg)。