Patent ID: 7176323

Claim:
A process for the production of a compound of a formula (1) which process comprises (a) reacting a compound of a formula (2) wherein Ar represents an unsubstituted C 6 –C 10 aryl group or a C 6 –C 10 aryl group substituted with at least one substituent independently selected from Substituent group α; Substituent group α is selected from the group consisting of a halogen atom, an unsubstituted C 1 –C 6 alkyl group, a halogenated C 1 –C 6 alkyl group, a hydroxyl group, a C 1 –C 6 alkoxy group, a C 1 –C 6 alkylthio group, a mercapto group, a C 1 –C 6 alkylsulfonyl group and a sulfamoyl group; and X represents a halogen atom, with a compound of a formula (3) wherein R a and R b are the same or different and each represents independently an unsubstituted C 1 –C 6 alkyl group; a C 1 –C 6 alkyl group substituted with at least one C 1 –C 6 alkoxy group; or a C 3 –C 6 cycloalkyl group; or R a and R b taken together represent a C 4 –C 8 alkylene group, in an inert solvent and hydrolyzing the resultant reaction product with an acid to afford a compound of a formula (4) wherein Ar has the same meaning as that indicated above; and (b) reacting the compound of the formula (4) with a compound of a formula (5) HO—W—OH (5) wherein W represents a C 1 –C 6 alkylene group, in the presence of an acid to afford the compound of the formula (1) wherein Ar and W have the same meanings as those indicated above.