Patent ID: 6376678
Filing Date: 2002-04-23
Classification: C07D

Abstract:
A method of producing a hydrazine derivative of the formula (IIa) wherein R is hydrogen atom, halogen atom, alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms, optionally substituted aryl or optionally substituted aromatic heterocyclic group, Râ€² is hydrogen atom, acyl, alkoxycarbonyl, alkyl or optionally substituted phenyl and Râ€³ is acyl, alkoxycarbonyl, alkyl or optionally substituted phenyl, which comprises subjecting a hydrazone derivative of the formula (Ia) wherein R, Râ€² and Râ€³ are as defined above, to catalytic reduction and deactivating the reduction catalyst contained in the reaction mixture thereof, so as to produce a hydrazine derivative.