- Choleretic drug alibendol preparation method
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The invention belongs to the field of drug synthesis, and provides an alibendol preparation method, which comprises: selecting 2-hydroxy-3-methoxybenzaldehyde as a raw material, selecting an efficientoxidative esterification catalyst, carrying out one-step oxidative esterification to obtain methyl 2-hydroxy-3-methoxybenzoate, carrying out a reaction on the methyl 2-hydroxy-3-methoxybenzoate and allyl bromide under the action of an alkali to generate methyl 2-allyloxy-3-methoxybenzoate, carrying out a para Claisen rearrangement reaction on the methyl 2-allyloxy-3-methoxybenzoate at a high temperature to obtain methyl 2-hydroxy-3-methoxy-5-allylbenzoate, and carrying out an aminolysis reaction in ethanolamine to generate alibendol. Compared with the traditional synthetic process, the new process of the present invention has characteristics of simple synthesis steps, convenient post-treatment and good product quality, and is suitable for industrial production.
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Paragraph 0017; 0019-0020; 0022
(2019/06/30)
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