Process for the preparation of aromatic methyl...

Details Process for the preparation of aromatic methyl... Process for the preparation of aromatic methyl...

C - Chemistry, Metallurgy

07

C

C07C 69/76 (2006.01) C07C 65/05 (2006.01) C07C 65/11 (2006.01) C07C 67/11 (2006.01) C07C 67/31 (2006.01) C07C 201/12 (2006.01) C07C 205/59 (2006.01) C07C 253/30 (2006.01) C07C 255/57 (2006.01)

Patent

CA 2131113

ABSTRACT The invention relates to a process for the preparation of aromatic methyl methoxycarboxylates of the general formula (I) CH3O-Ar-COOCH (I) in which Ar is a phenylene or naphthylene radical, which radicals may be further substituted. The process comprises reacting a mixture of aromatic hydroxycarboxylic acids of the general formula II HO-Ar-COOH (II) with aromatic methoxycarboxylic acids of the general formula III CH3O-Ar-COOH (III) with dimethyl sulphate, in the presence of a base. The process is simple, does not involve organic solvents and avoids the uneconomically high excesses of methylating agent used in known methylation processes of aromatic hydroxycarboxylic acids.

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