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publicationDate 2019-04-02-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber CN-109553531-A
titleOfInvention A kind of preparation method of brufen methyl esters
abstract The present invention provides a kind of preparation methods of brufen methyl esters, comprise the following steps: 1) brufen being added in methanol, and thionyl chloride reaction is added dropwise；2) washed reaction liquid, organic layer vacuum distillation, obtains brufen methyl esters；The purpose of the present invention is to provide a kind of process stabilizing, easy to operate, strong operability, the preparation methods for being suitble to industrialized brufen methyl esters；97% or more yield of the present invention, product quality is high, and HPLC content is up to 99% or more.
priorityDate 2019-01-21-04:00^^<http://www.w3.org/2001/XMLSchema#date>
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Total number of triples: 31.