Method for producing 2,5-dimethylphenyl acetic acid

Method for producing 2,5-dimethylphenyl acetic acid

  • CN 1,918,103 B
  • Filed: 01/22/2005
  • Issued: 08/08/2012
  • Est. Priority Date: 02/04/2004
  • Status: Active Grant
First Claim
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1. prepare 2;

  • The method of 5-dimethyl phenyl acetic acid is characterized in that, uses chloroacetyl chloride to carry out Friedel-Crafts reaction and is converted into 2-chloro-1-(2 to p-Xylol;

    The 5-xylyl) ethyl ketone makes the reaction of said ketone and formula (II) compound obtain formula (III) compound;

    Then through in a kind of polar aprotic solvent in the presence of weakly alkaline heating formula (III) compound is reset obtain formula (IV) and mixture (V), make said mixture hydrolysis obtain 2 then, the 5-dimethyl phenyl acetic acid,HO-CH 2-X-CH 2-OH (II) Wherein,X is direct singly-bound, CH 2, CHCH 3, CHC 2H 5, C (CH 3) 2Or C (C 2H 5) 2,

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