The carba (2) and oxa analogues (3) of 2- (phenylpiperazinylalkoxyphenyl) thiazolidine-3-carboxamide (1, Y=O) and-thiocarboxamide (1, Y=S) were synthesized and tested for cardiotonic activity. These analogues (2 and 3) were prepared from the aldehydes (4) through several intermediates (7, 10, and 13). In a series of the N-methylcarboxamides, positive inotropic activity in anesthetized dogs decreased in the following order : the thiazolidine (1a) >>oxazolidine (3a) >pyrrolidine (2a). In the corresponding thiocarboxamide series, however, the oxazolidine (3b) was the most potent, followed by the thiazolidine (1b) and the pyrrolidine (2c).
合成了 2-(苯基
哌嗪基烷氧基苯基)
噻唑烷-3-甲酰胺(1,Y=O)和-
硫代甲酰胺(1,Y=S)的卡巴类似物(2)和奥卡类似物(3),并进行了强心活性测试。这些类似物(2 和 3)由醛类化合物(4)通过几个中间体(7、10 和 13)制备而成。在一系列 N-甲基甲酰胺中,麻醉犬的正性肌力活性按以下顺序下降:
噻唑烷(1a)>>
恶唑烷(3a)>>
吡咯烷(2a)。然而,在相应的
硫代甲酰胺系列中,
恶唑烷(3b)的效力最强,其次是
噻唑烷(1b)和
吡咯烷(2c)。