<；P>；PROBLEM TO BE SOLVED: To provide a method for producing a compound (V) useful as a COMT inhibiting agent, and a new intermediate for use in producing the compound (V). <；P>；SOLUTION: There are disclosed a method for producing a compound (V) from a compound (I), and a new intermediate for use in producing the compound (V) (in the formulae, R<；SP>；1<；/SP>；represents a lower alkyl group, an aryl group that may be substituted, a heteroaryl group, a lower alkoxy group or the like； R<；SP>；2<；/SP>；represents a lower alkyl group, a cycloalkyl group, a lower alkoxy lower alkyl group, or a lower alkoxycarbonyl lower alkyl group； P<；SP>；1<；/SP>；represents a lower alkyl group； and P<；SP>；2<；/SP>；represents an unsubstituted or substituted benzyl group). <；P>；COPYRIGHT: (C)2011,JPO&INPIT
