1H-pyrazolo[4,3-c]isoquinoline and process for preparation thereof

Abstract

The invention relates to a compound of formula (I): H. in which: R1 represents a phenyl group which is optionally substituted by one or more halogen atoms; R2 represents: - a hydrogen or halogen atom or a cyano group; - a group C(=0)Y in which Y represents a hydrogen atom or a group –NH2 or -0Ra; - a group C(=S)NH2; a group -C(=NH)NH-OH; -a group -CH2OH or –CH2F; -a group -CH=N-OH; -a group -CH=CH2 or -CΞC-Ra; a group where Ra, represents a hydrogen atom or a (C1 C4)alkyl group; R3 represents a hydrogen atom or a (C1-C4)alkyl group; R4 repres ents an –NH2, (C1-C4)alkyl, (C1 C4)fluoroalkyl or (C3-C7)cycloalkyl group.