Patent ID: 8138352

Claim:
A method for producing a compound of formula (2): wherein n is an integer of 2 to 5; R 1 is a C1 to C4 alkyl group which may have a substituent or an aryl group which may have a substituent; and R 2 is an alkoxycarbonyl group which may have a substituent, an aralkyloxycarbonyl group which may have a substituent, an aliphatic acyl group which may have a substituent, or an aromatic acyl group which may have a substituent, said method comprising treating a compound of formula (1): wherein n, R 1 , and R 2 are the same as defined above; and R 3 is a C1 to C4 alkyl group which may have a substituent, an aralkyl group which may have a substituent, or a hydrogen atom under a hydrogen gas atmosphere in the presence of a metallic catalyst.