perinonfarbstoffe and methods for their manufacture

摘要

Dyestuffs consisting of the mixture of isomers of the formulae WHEREIN R1 is hydrogen, alkyl with 1 to 20 carbon atoms, alkoxyalkyl or alkoxycarbonyl each with up to 4 carbon atoms, benzyl, alkoxycarbonyl with up to 20 carbon atoms or phenyl, R2 is alkoxycarbonyl with up to 20 carbon atoms, cyano, alcanoyl, alkoxyalkoxycarbonyl each with up to 4 carbon atoms, carbonamido, phenylcarbonamido, mono- or dialkylcarbonamido with up to 8 carbon atoms or cyclohexylcarbonamido, R3 and R4 are identical and are hydrogen or alkoxy with 1 to 4 carbon atom atoms or R3 is alkoxy with 1 to 4 carbon atoms and R4 is hydrogen and R is phenylthio which may be substituted by one or two chlorine or bromine atoms, alkyl, alkoxy, carbalkoxy, alkylsulfonyl groups and with up to 4 carbon atoms or a cyano, trifluoromethyl or nitro group; naphthylthio, pyridinethio, benzimidazolyl-2-thio, benzoxazolyl-2-thio, benzthiazolyl-2-thio or an amino group of the formula R5 -N ANGLE R6 wherein R5 and R6 are hydrogen, alkyl or hydroxyalkyl with 1 to 4 carbon atoms or phenyl, or together are piperidine, morpholine or piperazine.