Process for preparing anthranylaldehyde derivatives

Abstract From the Canadian patent

The present invention is concerned with a process for preparing an anthranylaldehyde derivative of formula:, (wherein Z1 and Z2 are same or different each other and each represent a hydrogen atom, a halogen atom a methyl, group or a trifluoromethyl group; Z1 is attached to ortho position to the amino group and Z2 may be positioned at any of 3-, 4-, 5- and 6-positions.), which comprises steps of (1) reacting a o-halogenobenzaldehyde of formula: (wherein X represents a halogen atom.) with an alkylamine derivative of formula:, (wherein R and R1 each represents a lower alkyl group; Y represents a nitrogen, oxygen or sulfur atom; m represents an integer of 2 or 3; n represents 0 or 1 provided …