Method for producing chroman-carboxylic acid

Details Method for producing chroman-carboxylic acid Method for producing chroman-carboxylic acid

C - Chemistry, Metallurgy

07

D

C07D 311/66 (2006.01) C07D 311/74 (2006.01)

Patent

CA 2356059

A method for producing a chroman-carboxylic acid is provided, which method includes reacting a dialkylphenol compound, a formaldehyde and an alcohol in the presence of a secondary amine and an acid to give an alkoxymethylated phenol compound (Step 1); reacting the obtained alkoxymethylated phenol compound with an ester having a carbon-carbon double bond at a temperature of not less than 100ÀC to give a dialkylchroman carboxylic acid ester (Step 2); hydrolyzing the obtained dialkylchroman carboxylic acid ester to give a dialkylchroman-carboxylic acid (Step 3); and reacting the obtained dialkylchroman-carboxylic acid with an aromatic hydrocarbon in the presence of a Lewis acid (Step 4).

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