Studies on cardiotonic agents. V. Synthesis of 1-(6,7-dimethoxy-4-quinazolinyl)piperidine derivatives carrying various 5-membered heterocyclic rings at the 4-position.
作者:Yuji NOMOTO、Haruki TAKAI、Tadashi HIRATA、Masayuki TERANISHI、Tetsuji OHNO、Kazuhiro KUBO
DOI:10.1248/cpb.39.86
日期:——
A series of 1-(6, 7-dimethoxy-4-quinazolinyl)piperidines carrying various 5-membered heterocycles at the 4-position was synthesized and examined for cardiotonic activity in anesthesized dogs. The (4-oxo-2-thioxo-3-imidazolidinyl)amino derivatives showed the most potent inotropic activity. Marked loss of activity was observed in the 2, 4-dihydro-3-thioxo-3H-1, 2, 4-triazolyl, the 2, 4-dihydro-3-oxo-3H-pyrazolyl and the (2, 3-dihydro-2-thioxo-3H-1, 3, 4-thiadiazol-5-yl)amino derivatives. The synthesis and structure-activity relationships are discussed.
一系列在4位携带不同5元杂环的1-(6,7-二甲氧基-4-喹唑啉基)哌啶被合成并在麻醉犬中进行了强心活性测试。(4-氧代-2-硫酮-3-咪唑烷基)氨基衍生物显示出最强的正性肌力活性。在2,4-二氢-3-硫酮-3H-1,2,4-三唑基、2,4-二氢-3-氧代-3H-吡唑基以及(2,3-二氢-2-硫酮-3H-1,3,4-噻二唑-5-基)氨基衍生物中观察到了显著的活性损失。合成方法和结构-活性关系在文中进行了讨论。