Patent ID: 8586762

Claim:
A process for producing a compound represented by the Formula (I): wherein R is an ester residue, R a is a hydrogen atom or a substituent, Ar is an aromatic hydrocarbon group which may have a substituent, Y 1 and Y 2 are, the same or different and independently, a hydrogen atom or a substituent, a ring B is a nitrogen-containing ring which may have a substituent, n is an integer of 1 to 3 or a salt thereof, which comprises obtaining a compound represented by the Formula (II): wherein each symbol is defined above or a salt thereof by reducing a compound represented by the Formula (III): wherein each symbol is defined above or a salt thereof in the presence of a metal hydride complex and a metal halide compound, and then subjecting the compound represented by the Formula (II) to a ring-closing reaction.