A series of 4-aryl-4, 7-dihydropyrazolo [3, 4-b] pyridine-5-carboxylate derivatives (72-149) was prepared and the compounds were tested for Ca-blocking activity in isolated guinea pig portal vein, antihypertensive activity in spontaneously hypertensive rats, and coronary vasodilating effect in isolated guinea pig heart. A number of derivatives had potent antihypertensive and coronary vasodilating activities. The structure-activity relationships of the series indicated that a 3-cyclopentyl or 3-cyclohexyl substituent and a hydrophobic 5-ester moiety with moderate bulkiness were effective for increasing the pharmacological potencies.
合成了一系列4-芳基-4, 7-
二氢吡唑[3, 4-b]
吡啶-5-
羧酸酯衍
生物(72-149),并对这些化合物进行了在分离的豚鼠门静脉中的
钙通道阻滞活性、自发性高血压大鼠中的抗高血压活性以及在分离的豚鼠心脏中的冠状血管扩张作用的测试。多种衍
生物具有强效的抗高血压和冠状血管扩张活性。该系列的结构-活性关系表明,3-环戊基或3-环己基取代基以及具有适度体积的疏
水性5-酯基团对于提高药理活性是有效的。