This invention relates to a procedure for obtaining a thiophene-2-carboxamide compound, specifically rivaroxaban, which comprises the (i) fragmentation of the N=C bond of a compound of formula 23 where R1 is selected among hydrogen, halogen, and (C1-C6)alkyl; and (ii) acylation of the resulting intermediate with 5-chloro-tiofen-2-carbonyl chloride in a solvent medium, in the presence of a base. The invention also relates to the compounds of formula 23 and their use in the obtention of rivaroxaban.
这项发明涉及一种用于获得一种
噻吩-2-甲酰胺化合物的方法,具体为利伐罗班,该方法包括:(i)将具有
化学式23的化合物的N=C键断裂,其中R1在氢、卤素和(C1-C6)烷基中选择;以及(ii)在溶剂介质中,在碱的存在下,用5-
氯噻吩-2-羰基
氯化物对所得中间体进行酰化。该发明还涉及
化学式23的化合物及其在获得利伐罗班中的用途。