1354727-65-3Relevant articles and documents
Improved method for preparing dabigatran etexilate intermediate
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Paragraph 0017; 0040-0049, (2020/10/30)
The invention belongs to the field of medical intermediate synthetic methods, and relates to an improved method for preparing a dabigatran etexilate intermediate, in particular, a synthetic method of3-[[[2-[[(4-amidinophenyl)amino]methyl]-1H-benzimidazole-5-yl]carbonyl](pyridine-2-yl)amino] ethyl propionate p-toluene sulfonate 1. According to the method, use of a large amount of solvents and hydrogen chloride is avoided, the reaction process is stable, the dosage of reactants is easy to control, on one hand, impurities generated by side reactions are reduced, and subsequent synthesized dabigatran etexilate is easier to purify; on the other hand, wastes caused by release of saturated hydrogen chloride gas are greatly reduced, the environmental pollution is reduced, meanwhile the steps aresimple and easy to control, and the method is suitable for large-scale production.
Preparation method of alkaline liquor of high concentration and application thereof
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Paragraph 0008; 0019; 0020; 0021; 0022; 0023; 0024-0029, (2017/04/29)
The invention relates to a preparation method of alkaline liquor of high concentration. The preparation method concretely comprises the following steps: a proper amount of a solubilizer and a phase-transfer catalyst are added into an organic phase; a modi
SYNTHESIS PROCESS OF DABIGATRAN ETEXILATE MESYLATE, INTERMEDIATES OF THE PROCESS AND NOVEL POLYMORPH OF DABIGATRAN ETEXILATE
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Page/Page column 15, (2015/09/23)
12956PTWO_eng 23 "SYNTHESIS PROCESS OF DABIGATRAN ETEXILATE MESYLATE, INTERMEDIATES OF THE PROCESS AND NOVEL POLYMORPH OF DABIGATRAN ETEXILATE" Abstract A novel process is described for the production of Dabigatran etexilate mesylate, a 5 compound having the following structural formula: and two novel intermediates of said process.