Azomethine compounds

Abstract

Abstract An azomethine compound of the general formula ##STR1## wherein A and B, independently of the other, represent naphthylene or phenylene which are unsubstituted or substituted by halogen, cyano, nitro, lower alkyl, lower alkoxy, benzyloxy or phenoxy, X represents a group of the formula ##STR2## R 1 and Y 1 each represents alkyl of at most 12 carbon atoms which is unsubstituted or substituted by halogen, hydroxyl, cyano, lower alkoxy or lower alkyl-carbonyloxy; cycloalkyl, phenyl, benzyl or phenyl or benzyl which are substituted by halogen, nitro, lower alkyl or lower alkoxy, R 2 and Y 2 each represents hydrogen, alkyl of at most 12 carbon atoms which is unsubstituted or substituted by halogen, hydroxyl, cyano, lower alkoxy or lower alkyl-carbonyloxy; cycloalkyl, benzyl or benzyl which is substituted by halogen, nitro, lower alkyl or lower alkoxy or each pair of substituents R 1 and R 2 or Y 1 and Y 2 , together with the nitrogen atom to which they are attached, independently represents a 5- or 6-membered heterocyclic radical, Q represents --CO-- or --SO 2 -- and the benzene ring D is unsubstituted or substituted by halogen, nitro, lower alkyl or lower alkoxy; these compounds are particularly useful as color formers which give intense yellow or orange shades of excellent light fastness when they are brought into contact with an electron-accepting coreactant.

Inventors

• 👤 Robert Garner

Bibliographic Details