Indolinospiropyrane compounds

Abstract

Abstract An indolinospiropyrane compound of the formula ##STR1## wherein R 1 represents alkyl which has at most 12 carbon atoms and is unsubstituted or substituted by halogen, hydroxyl, cyano, lower alkoxy or lower alkyl-carbonyloxy, or cycloalkyl, phenyl or benzyl or phenyl or benzyl which are substituted by halogen, nitro, lower alkyl or lower alkoxy, R 2 represents hydrogen, alkyl which has at most 12 carbon atoms and is unsubstituted or substituted by halogen, hydroxyl, cyano, lower alkoxy or lower alkyl-carbonyloxy, or cycloalkyl or benzyl which is unsubstituted or substituted by halogen, nitro, lower alkyl or lower alkoxy, or R 1 and R 2 , together with the nitrogen atom which links them, represent a 5-membered or 6-membered heterocyclic radical, X represents alkyl which has at most 12 carbon atoms and is unsubstituted or substituted by halogen, unsubstituted or substituted benzyl or phenyl or an unsubstituted or substituted heterocyclic radical, Y represents alkyl which has at most 12 carbon atoms and is unsubstituted or substituted by halogen, cyano or lower alkoxy, or benzyl which is unsubstituted or substituted by halogen, nitro, lower alkyl or lower alkoxy, Z represents hydrogen, halogen or lower alkyl and V 1 and V 2 each represent lower alkyl, cycloalkyl or benzyl, or conjointly represent alkylene, and the ring A is unsubstituted or substituted by halogen, nitro, cyano, trifluoromethyl, lower alkyl, lower alkoxy, lower alkoxy-carbonyl, phenoxy, amino, lower alkylamino or N-lower alkyl-carbonylamino; these compounds are distinguished by an outstanding storage stability and are particularly useful as color formers which give intense orange, red or violet color shades of excellent light fastness when they are brought into contact with an electron-accepting co-reactant.

Inventors

• 👤 Peter Burri

Bibliographic Details