872728-84-2Relevant articles and documents
METHOD FOR PRODUCING AN INTERMEDIATE PRODUCT OF DABIGATRAN ETEXILATE
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Page/Page column 4, (2011/06/10)
The invention relates to a process for preparing the compound of formula 1 a valuable intermediate product in the synthesis of the pharmaceutical active substance dabigatran etexilate.
IMPROVED PROCESS FOR THE PREPARATION OF 4-(BENZIMIDAZOLYLMETHYLAMINO)-BENZAMIDES AND THE SALTS THEREOF
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Page/Page column 23-24, (2010/11/27)
The invention relates to a process for preparing an optionally substituted 4-benzimidazol- 2-ylmethylamino)-benzamidine, characterised in that (a) an optionally correspondingly substituted diaminobenzene is condensed with 2 [4- (1,2,4-oxadiazol-5-on-3-yl)-phenylamino]-acetic acid, (b) i) the product thus obtained is hydrogenated and ii) optionally the amidino group is carbonylated, without isolating the intermediate product of the hydrogenation beforehand; as well as a process for preparing a salt of an optionally substituted 4(benzimidazol-2-ylmethylamino)-benzamidine, wherein (a) an optionally correspondingly substituted diaminobenzene is condensed with 2-[4-(1,2,4-oxadiazol-5-on-3-yl)-phenylamino]-acetic acid, (b) the product thus obtained is hydrogenated, and (c) i) optionally the amidino group is carbonylated and ii) without prior isolation of the intermediate product of the carbonylation the desired salt is isolated.
IMPROVED PROCESS FOR THE PREPARATION OF THE SALTS OF 4-(BENZIMIDAZOLYLMETHYLAMINO)-BENZAMIDES
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Page/Page column 19, (2010/11/27)
The invention relates to a process for preparing a salt of an optionally substituted 4-benzimidazol-2-ylmethylamino)-benzamidine, characterised in that (a) an optionally correspondingly substituted diaminobenzene is condensed with 2-[4-(1,2,4-oxadiazol-5-on-3-yl)-phenylamino]-acetic acid, b) i) the product thus obtained is hydrogenated, ii) optionally the amidino group is carbonylated, without isolating the intermediate product of the hydrogenation beforehand and iii) without prior isolation of the intermediate product of the carbonylation the desired salt is isolated.