Production method of aromatic carboxylic acid derivative

摘要

The present invention provides methods for producing a highly pure aromatic bromocarboxylic acid derivative and an aromatic acylthiocarboxylic acid derivative in high yields. The methods of the present invention include reacting an aromatic amino acid in an aqueous solvent in the presence of sodium nitrite, hydrogen bromide and at least one member selected from the group consisting of an aliphatic carboxylic acid and an alcohol, to give an aromatic bromocarboxylic acid derivative, and reacting the aromatic bromocarboxylic acid derivative and an organic thio acid in the presence of an amine to give an aromatic acylthiocarboxylic acid derivative.