- Method for preparing prucalopride
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The invention provides a method for preparing prucalopride. The method comprises the following steps: taking 3-chloro-4-methylaniline as an initial raw material, performing amino protection, nucleophilic substitution, hydroxy protection, aromatic hydrocarbon chlorination, free radical bromination, hydrolysis, molecular Friedel-Crafts alkylation reaction ring closure, amino deprotection and oxidative amidation, thereby obtaining the prucalopride. According to the scheme, a dangerous process is not adopted, any highly toxic reagent is not used, the method is safe, green and environmental-friendly, the amount of by-products produced in the reaction is small, and the yield is improved.
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- Preparation method of prucalopride succinate
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The invention provides a preparation method of prucalopride succinate. The method comprises the steps that 4-nitrobenzaldehyde is taken as an initial raw material, and protected by formyl group, nitroreduction, amino protection, aromatic hydrocarbon chlor
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- PROCESSES FOR THE PREPARATION OF HIGHLY PURE PRUCALOPRIDE SUCCINATE AND ITS INTERMEDIATES
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Provided herein are purification processes for the preparation of highly pure prucalopride succinate salt. Provided also herein are improved, commercially viable and industrially advantageous processes for the preparation of Prucalopride and its intermediate compounds, for example, methyl 4-acetylamino-5-chloro-2,3-dihydrobenzo[b]furan-7-carboxylate and alkyl 4-[[(4-amino-5-chloro-2,3-dihydro-7-benzofuranyl)carbonyl]-amino]-1-piperidinecarboxylate.
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- A process for the preparation of intermediate the Pu card must benefit new process (by machine translation)
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The invention discloses a compound of formula (I) indicated by the 1 - (3 - a oxygen propyl) - 4 - amino piperdine preparation method, it includes such as the following steps: (1) a compound of formula (II) in the reaction in a solution of ammonia the system results in the type (III) compound; (2) the compound of formula (III) with 1, 3 - dibromo - 5, 5 - dimethyl hydantoin in the reaction under alkaline condition is the system results in the type (I) compound. This preparation method without special reaction equipment requirements, the operation is simple, and is suitable for industrial production; high yield, three wastes, low cost; high purity, heavy metal residue problem. (by machine translation)
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