A series of (2S,4S)-4-amino-N-arylpyroglutamic acids was first obtained by the nucleophilic substitution of bromine atom in dimethyl (2S,4RS)-4-bromo-N-phthaloylglutamate under the action of primary arylamines, followed by the separation of diastereomers and removal of protecting groups by acidic hydrolysis. These compounds were studied for anti-platelet and antithrombotic activity in experiments in vitro and in vivo. Some compounds were identified as exhibiting a significant effect on platelet function, which was manifested in slowing down the process of thrombus formation in the model of arterial and deep vein thrombosis. It was established that the most efficient compound is (2S,4S)-4-amino-N-(4-fluoro-phenyl)pyroglutamic acid, with its effect being comparable to that of acetylsalicylic acid.
首先,在伯芳胺的作用下,对二甲基(2S,4RS)-4-
溴-N-邻苯二甲酰谷
氨酸中的
溴原子进行亲核取代,得到一系列(2S,4S)-4-
氨基-N-芳基焦谷
氨酸,然后分离非对映异构体,并通过酸性
水解去除保护基团。在体外和体内实验中,对这些化合物的抗血小板和抗血栓活性进行了研究。一些化合物被证实对血小板功能有显著影响,在动脉和深静脉血栓形成模型中,这种影响表现为减缓血栓形成过程。研究证实,最有效的化合物是(2S,4S)-4-
氨基-N-(4-
氟苯基)焦谷
氨酸,其效果与乙酰
水杨酸相当。