Patent ID: 8586753
Filing Date: 2013-11-19
Classification: C07D

Abstract:
1. A process for the preparation of a compound of formula (I) in which R R A is alkyl or is in which R Z is CH or N, comprising, reacting a compound of formula (II) in which R R R n is 0 or 1, with an alkyl- or arylhydrazine of formula (III) in which A is alkyl or is in which R Z is CH or N, in the presence of a solvent to obtain a compound of formula (IV), in which R wherein said compound of formula (IV) is optionally further reacted without prior isolation with elimination of water, in the presence of a solvent, to obtain a compound of formula (V) in which R of formula (V) is reacted in the presence of a solvent to obtain a compound of formula (I), in which R