Benzisothiazole and indazole azo compounds

Claim 1

An azo compound free of sulfonic acid groups, of the formula ##SPC21## wherein X 1 and X 2 are independently selected from the group consisting of hydrogen, nitro, chloro, bromo and methyl; R is hydrogen, c and d each are hydrogen, methyl, ethyl, methoxy, ethoxy, phenylthio or phenoxy and c additionally denotes chlorine, bromine, trifluoromethyl, acetylamino, propionylamino, methylsulfonylamino, ethylsulfonylamino, p-toluenesulfonylamino, methoxycarbonyl, phenoxycarbonyl, aminocarbonyl, benzyl, --NH--CO--(CH 2 ) n --COOH, where n=0, 1, 2, or 3, or --NH--CO--CH=CH--COOH; and R 1 and R 2 are each hydrogen, lower alkyl, benzyl, β-phenylethyl, β-chloroethyl, β,β,β-trifluoroethyl, β,γ-dichloropropyl, β-cyanoethyl, β-ethoxyethyl, δ-methoxybutyl, glycidyl, β-hydroxyethyl, β,γ-hydroxypropyl, β-nitroethyl, β-carbo-(methoxy-, ethoxy- or propoxy-) ethyl, β- or γ-carbo-(methoxy- or ethoxy-) propyl, β-(acetyl- or formyl-) aminoethyl, β-acetoxyethyl, β,γ-diacetoxypropyl, γ-butyryloxypropyl, β-phenylsulphonylethyl, β-toluenesulphonylethyl, β-(p-chlorobenzenesulfonyl)ethyl, β-methylcarbamyloxyethyl, β-phenylcarbamyloxyethyl, β-(methoxy-, ethoxy or isopropoxy-)carbonyloxyethyl, γ-acetamidopropyl, β-(p-nitrophenoxy)ethyl, β-(p-hydroxyphenoxy)ethyl, β(β'-acetylethoxycarbonyl)ethyl, β-[(β'-cyano-, hydroxy-, methoxy- or acetoxy-) ethoxycarbonyl] ethyl, cyanoethoxyethyl, --C 2 --C 3 -alkylene--COOH, β-acetylethyl, γ-aminopropyl, β-diethylaminoethyl, β-cyanoacetoxyethyl, carboxyphenyl or --C 2 H 4 --O--CO--CH=CH--COOH with the proviso that one of c, R 1 and R 2 is substituted by a carboxy group, or both R 1 and R 2 are substituted by a carboxy group.