The present invention relates to a process for the preparation of acetyl-amidiniophenylalanyl-cyclohexylglycyl-pyridinioalaninamides of the formula I,
1
in which the anions X are physiologically acceptable anions, and their analogs, which are effective inhibitors of the blood coagulation factor Xa and which can be used, for example, for preventing thromboses. The process according to the invention comprises the coupling of 2-[2-acetylamino-3-(4-amidinophenyl)propionylamino]-2-cyclohexylacetic acid, which is obtained from 2-[2-acetylamino-3-(4-cyanophenyl)acryloylamino]-2-cyclohexylacetic acid by asymmetric hydrogenation and conversion of the cyano group into the amidine, or a salt thereof, with a 3-(2-amino-2-carbamoylethyl)-1-methylpyridinium salt or a salt thereof. The invention furthermore provides starting materials and intermediates for this process, processes for their preparation and acetyl-(S)-4-amidiniophenylalanyl-(S)-cyclohexylglycyl-(S)-(1-methyl-3-pyridinio)alaninamide as ditosylate salt.
本发明涉及一种制备乙酰-
氨基苯丙
氨基环己基甘
氨酸基
吡啶基丙
氨酰胺的方法,其
化学式为I,其中阴离子X是生理上可接受的阴离子及其类似物。这些类似物是有效的
凝血因子Xa的
抑制剂,可以用于预防血栓形成。根据本发明的方法包括2-[2-乙酰
氨基-3-(4-
氨基苯基)丙酰
氨基]-2-
环己基乙酸的偶联,该化合物是通过不对称氢化和将
氰基转化为胺基得到的,或其盐,与3-(2-
氨基-2-羰基乙基)-1-
甲基吡啶盐或其盐进行偶联。此外,该发明还提供了此过程的起始物质和中间体,以及用于其制备的方法和乙酰-(S)-4-
氨基苯丙基-(S)-环己基甘
氨酰-(S)-(1-甲基-3-
吡啶基)丙
氨酰胺作为重
苯磺酸盐。