| abstract |
(57) [Summary] (Corrected) [Purpose] 3-Used as a developer for pressure-sensitive paper and thermal paper An inexpensive method for producing an alkyl-5-benzylsalicylic acid derivative is provided. A 3-alkyl-5-benzylsalicylic acid derivative of the formula (I) is prepared by reacting 3-alkylsalicylic acid with benzyl alcohol, benzylalkyl ethers or dibenzyl ethers in the presence of an aluminum chloride catalyst. .. (In the formula, R 1 represents an alkyl group or a cycloalkyl group having 1 to 12 carbon atoms, and R 2 and R 3 represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 12 carbon atoms, an aralkyl group, an aryl group or a cyclo group. Indicates an alkyl group) |