Monoazo compounds

Claim 1

A dyestuff of the formula ##SPC62## wherein D is selected from the group consisting of thiazole-(2)-, 5-nitrothiazole-(2)-, 5-methylsulphonylthiazole-(2)-, 5-cyanothiazole-(2)-, 4-methyl-5-nitrothiazole-(2)-, 4-methylthiazole-(2)-, 4-phenylthiazole-(2)-, 4-(4'-chloro)- phenylthiazole-(2)-, 4-(4'-nitro)- phenylthiazole-(2)-, pyridine-(3)-, quinoline-(3)-, pyrazole-(3)-, 1-phenylpyrazole-(3)-, indazole-(3)-, 1,2,4-thiazole-(3)-, 5-(methyl, ethyl, phenyl or benzyl)-1,2,4-triazole-(3)-, 1-(4'-methoxyphenyl)-pyrazole-(3)-, benzthiazole-(2)-, 6-methylbenzthiazole-(2)-, 6-methoxybenzthiazole-(2)-, 6-chlorobenzthiazole-(2)-, 6-cyanobenzthiazole-(2)-, 6-thiocyanatobenzthiazole-(2)-, 6-nitrobenzthiazole-(2)-, 6-carbethoxybenzthiazole-(2)-, 4- or 6-methylsulphonylbenzthiazole-(2)-, 1,3,4-thiadiazole-(2)-, 1,3,5-thiadiazole-(2)-, 4-(phenyl or methyl)-1,3,5-thiadiazole-(2)-, 5-phenyl-1,3,4-thiadiazole-(2)-, 3-nitro-5-methylsulphothiophene-(2)-, 3,5-bis(methylsulpho)-thiophene-(2)-, 3-methylisothiazole-(5)-, 4-cyanopyrazole-(2)-, 2-(4'-nitrophenyl)-4-cyanopyrazole-(3)-, phthalimide-(3)-, or ##SPC63## R 1 ' and R 2 ' are each hydrogen, alkyl of 1 to 4 carbon atoms, benzyl, β-phenylethyl; β-chloroethyl, β,β,β-trifluoroethyl, β,γ-dichloropropyl, β-cyanoethyl, β-ethoxyethyl, δ-methoxybutyl, β-hydroxyethyl, β,γ-dihydroxypropyl, β-nitroethyl, (β-carbomethoxy)-ethyl, (β-carboethoxy)-ethyl, (β-carbopropoxy)-ethyl, (β-carbomethoxy)-propyl, (γ-carbomethoxy)-propyl, (β-carboethoxy)-propyl, (γ-carboethoxy)-propyl, (β-acetyl)-aminoethyl, (β-formyl)-aminoethyl, β-acetoxyethyl, β,γ-diacetoxypropyl, β-methanesulfonylethyl, β-ethanesulfonylethyl, β-(p-chlorobenzenesulfonyl)-ethyl, β-methylcarbamyloxyethyl, β-phenyl-carbamyloxyethyl, (β-methoxy)-carbonyloxyethyl, (β-ethoxy)-carbonyloxyethyl, (β-isopropoxy)-carbonyloxyethyl, γ-acetamidopropyl, β-(p-nitrophenoxy)-ethyl, β-(p-hydroxyphenoxy)-ethyl, β-(β'-acetylethoxycarbonyl)-ethyl, β-[(β'-cyano)ethoxycarbonyl]-ethyl, β-[(β'-hydroxy) ethoxycarbonyl]-ethyl, β-[(β'-methoxy)ethoxycarbonyl]-ethyl, β-carboxyethyl, β-acetylethyl, γ-aminopropyl, β-diethylaminoethyl, or β-cyanoacetoxyethyl, d is hydrogen, methyl, ethyl, methoxy, ethoxy, phenylthio or phenoxy, c is hydrogen, methyl, ethyl, methoxy, ethoxy, phenylthio, phenoxy, chloro, bromo, CF 3 --, methylsulfonyl, methylsulfonylamino, ethanesulfonylamino, p-toluenesulfonylamino, phenoxycarbonylamino, methoxycarbonylamino, or aminocarbonylamino, and in which one or two of c, d, R 1 ', or R 2 ' is substituted by a group of the formula --X--CO--N(R)--SO.sub.2 --R.sub.2 wherein R 2 is alkyl of 1 to 4 carbon atoms, cyclohexyl, p-tolyl, 2,5-dimethylphenyl, phenyl, 4-chloro, bromo or fluorophenyl, X is --O--, --S-- or --NR--, and R is hydrogen, alkyl of 1 to 3 carbon atoms, or cyclohexyl.