Dialkyl bicyclic heterocycles with a bridgehead nitrogen as purine analogs possessing significant cardiac inotropic activity
作者:Takayuki Okabe、Bharat Bhooshan、Thomas Novinson、Ira W. Hillyard、Garland E. Garner、Roland K. Robins
DOI:10.1002/jhet.5570200345
日期:1983.5
7-dialkyl-s-triazolo[1,5-a]pyrimidines and 5,7-dialkylpyrazolo[1,5-a]pyrimidines and related heterocycles containing a bridgehead nitrogen have been prepared and studied as cardiovascular agents in the anesthetized dog. A number of these compounds have exhibited significant inotropic activity with little effect on heart rate. Especially active were 5,7-dialkyl-2-amino or 2-alkylthio-s-triazolo[1,5-a]pyrimidines. In
一些5,7-二烷基小号-三唑并[1,5-一个]嘧啶和5,7- dialkylpyrazolo [1,5-一个]嘧啶类和含有桥头氮相关杂环已经制备和研究作为在心血管药剂麻醉的狗。这些化合物中的许多已显示出显着的正性肌力活性,而对心率的影响很小。尤其是活性5,7-二烷基-2-氨基或2-烷硫基小号-三唑并[1,5-一个]嘧啶。相反,这些环系化合物中的高极性嘌呤类似物,例如5,7-二-正丙基-2-苄硫基-1,3,4-噻二唑并[3,2- a ]嘧啶溴化物45桥头上含氮的电荷不活泼。讨论了相关环系统的二烷基衍生物的详细的结构活性关系。某些环氮原子的存在对于有效的体内活性至关重要,大概是由于这些位点上的特定酶结合所致。研究的几种化合物具有口服活性,是优良的候选食品,可进一步在人体中进行评估。