作者:Bernd Schäfer、Harald Bernard、Gerd Bülow、Udo E. Lange、Helmut Mack、Thomas Pfeiffer、Werner Seitz、Thomas Zierke
DOI:10.1055/s-2004-831200
日期:——
In this account, we describe the development of an efficient and convergent process for the peptidomimetic thrombin inhibitor 1 on production plant scale. Starting from nicotinonitrile (13), (2S,4R)-1-(tert-butoxycarbonyl)-4-hydroxy-2-pyrrolidinecarboxylic acid (5) and (2R)-2-amino-3-cyclohexylpropanoic acid (29) compound 1 was obtained in 16 chemical steps. New methods had been developed for the preparation of the key intermediate dehydroproline 22 and the transformation of nitriles into amidines. The thrombin inhibitor 1 was isolated by special techniques (nanofiltration and spray drying). Almost all salts of 1 are amorphous, however, a crystalline complex was obtained with 1,2-benzisothiazol-3(2H)-one 1,1-dioxide (Saccharin®).
在本报告中,我们描述了在生产工厂规模上开发一种高效且收敛的肽类模仿物 thrombin 抑制剂 1 的过程。以尼古丁腈(13)、(2S,4R)-1-(叔丁氧基碳酰基)-4-羟基-2-吡咯烷羧酸(5)和 (2R)-2-氨基-3-环己基丙酸(29)为起始材料,通过16个化学步骤合成出了化合物 1。我们开发了新方法以制备关键中间体去氢脯氨酸 22,并将腈转化为酰胺。通过特殊技术(纳滤和喷雾干燥)分离得到了 thrombin 抑制剂 1。几乎所有的 1 的盐都是无定形的,然而,我们得到了一种与 1,2-苯异噻唑-3(2H)-酮 1,1-二氧化物(糖精®)的结晶复合物。