Azo dyes derived from 3-amino-2,1-benzisothiazoles and aromatic amine couplers containing sulfo groups, or salts thereof

Claim 1

A dye of the formula: ##STR19## wherein the Coupler is of the formulae ##STR20## wherein R may be hydrogen or one to three substituents selected from lower alkyl, lower alkoxy, chlorine, bromine, iodine, lower alkylsulfonyl, sulfamoyl, and sulfamoyl substituted with lower alkyl; R 1 is selected from hydrogen, lower alkyl, aryl, alkylamino, 2-furyl, halogen, lower alkoxy, aryloxy, --NHCO--R 5 and --NHSO 2 --R 5 wherein R 5 is selected from lower alkyl which may be substituted with hydroxy, lower alkoxy, cyano, aryloxy, aryl, halogen, cycloalkyl, lower alkylcarbonyloxy, or carbamoyl; R 2 is selected from hydrogen, aryl, cycloalkyl, and lower alkyl which may be substituted with alkoxy, alkoxyalkoxy, aryl, cycloalkyl, lower alkylcycloalkyl, 2-furyl, NHCOR 5 , NHSO 2 R 5 , aryloxy, alkylcarbonyl, carbamoyl, lower alkyl substituted carbamoyl, cyano, alkanoyloxy, halogen, alkoxycarbonyl, succinimido, glutarimido, phthalimido, 2-pyrrolidono, sulfamoyl, lower alkyl substituted sulfamoyl, lower alkylsulfonamido, NHSO 2 -aryl, NHCOO-alkyl, NHCONH-alkyl, formamido, alkylsulfonyl, arylsulfonyl, alkylthio, arylthio or SO 3 M; R 2 may in conjunction with R 1 form a 1,2,3,4-tetrahydroquinoline or benzomorpholine derivative; n is 0, 1 or 2; M is Na + , K + , NH 4 + , or H + ; R 3 and R 4 are each selected from hydrogen or lower alkyl; Z is selected from straight or branched chain lower alkylene, lower alkylene substituted with aryl, aryloxy, alkoxy, halogen, aryloxy or SO 3 M, --CH 2 (CH 2 ) m --X--CH 2 (CH 2 ) p , where m is 1, 2, or 3, p is 0, 1, 2, or 3, and X is O, S, SO 2 , ##STR21## and the various aryl groups may be substituted with lower alkyl, lower alkoxy, or halogen.