2-methylimidazo[4,5-c]pyridine group has led to the identification of a new series of 1-[(1-acyl-4- piperidyl)methyl]-1H-2-methylimidazo[4,5-c]pyridine derivatives as potent, orally active platelet-activating factor (PAF) antagonists. On the basis of the general structure--activity relationship trends found for the acyl substituent in our earlier series, five groups of compounds were tested, diaryl-
用
2-甲基咪唑并[4,5-c]
吡啶基取代以前的1-酰基-4-[(2-甲基-3-
吡啶基)-
氰基甲基]
哌嗪系列的极性头已导致鉴定出一系列新的1-[(1-酰基-4-
哌啶基)甲基] -1H-
2-甲基咪唑并[4,5-c]
吡啶衍生物作为有效的口服活性血小板活化因子(PAF)拮抗剂。根据我们先前系列中酰基取代基的一般结构-活性关系趋势,测试了五组化合物,二芳基或烷基芳基丙酰基衍
生物,其3-羟基取代的类似物以及
尿素,
氨基甲酸酯和
氨基酸衍生品。带有3,3-二苯基丙酰基部分的最佳化合物19 UR-12670)对于体外PAF诱导的血小板凝集测定,ID50 = 0表现出非常高的体外和体内效能IC50 = 0.0076 microM。在正常血压大鼠体内进行PAF诱导的低血压测试时为0086 mg / kg,对于小鼠中PAF诱导的死亡率测试,ID50 = 0.092 mg / kg po,静脉注射ID50 = 0.0008