Patent ID: 8455519

Claim:
A process for preparing a compound of formula (I): wherein: R is a linear or branched alkyl group containing 1 to 3 carbon atoms, Y is CH or N, and p is an integer of 0 to 3, or a salt thereof, wherein said process comprises: (1) reacting a compound of formula A: in which A represents an anionic residue of a mineral or organic acid, with a compound of formula B: in which R 1 represents a linear or branched alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group containing 1 to 10 carbon atoms, and X represents a halogen atom, to obtain an ester of the compound of formula (I); and (2) hydrolyzing said ester of the compound of formula (I) to produce said compound of formula (I) or a salt thereof.