Monoazo compounds

A compound of the formula ##SPC12##

• wherein
• a is hydrogen, halogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, nitro, cyano, carbalkoxy wherein the alkoxy group thereof has 1 to 4 carbon atoms, or alkylsulfonyl of 1 to 4 carbon atoms,
• b is hydrogen, halogen, alkyl of 1 to 4 carbon atoms, cyano or trifluoromethyl,
• e is nitro, cyano, carbalkoxy wherein the alkoxy group thereof has 1 to 4 carbon atoms, sulfonamido, N-C.sub.1 -C.sub.4 -alkylated sulfonamido, or alkylsulfonyl of 1 to 4 carbon atoms,
• f is hydrogen, halogen, carbalkoxy wherein the alkoxy group thereof has 1 to 4 carbon atoms, or aminocarbonyl,
• c and d independently are hydrogen, C.sub.1 -C.sub.2 -alkyl, C.sub.1 -C.sub.2 -alkoxy, phenyl, phenoxy, benzyl, phenylethyl or phenylthio, and
• c additionally represents bromo, trifluoromethyl, C.sub.1 -C.sub.6 -alkylcarbonylamino, C.sub.6 -C.sub.7 -arylcarbonylamino, C.sub.1 -C.sub.6 -alkoxycarbonylamino, C.sub.6 -C.sub.7 -aryloxycarbonylamino, C.sub.1 -C.sub.6 -alkylsulfonylamino, C.sub.6 -C.sub.7 -arylsulfonylamino, C.sub.1 -C.sub.6 -alkylaminocarbonylamino, C.sub.6 -C.sub.7 -arylaminocarbonylamino, formylamino, ureyl or chloroacetylamino,
• R.sub.1 is C.sub.1 -C.sub.9 -alkyl or C.sub.1 -C.sub.9 alkyl substituted by phenyl, chloro, fluoro, hydroxy, cyano, cyanoethoxy, phenyloxy, phenylmercapto, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxy, formyloxy, C.sub.1 -C.sub.18 -alkylcarbonyloxy, C.sub.6 -C.sub.7 -arylcarbonyloxy, formylamido, C.sub.1 -C.sub.6 -alkylcarbonylamino, C.sub.6 -C.sub.7 -arylcarbonylamino, C.sub.1 -C.sub.6 -alkylsulfonyloxy, C.sub.6 -C.sub.7 -arylsulfonyloxy, C.sub.1 -C.sub.6 -alkylsulfonylamino, C.sub.6 -C.sub.7 -arylsulfonylamino, vinylsulfonyl, C.sub.1 -C.sub.18 -alkoxycarbonylox C.sub.6 -C.sub.7 -aryloxycarbonyloxy, C.sub.1 -C.sub.18 -alkylaminocarbonyloxy, C.sub.6 -C.sub.7 -arylaminocarbonyloxy, phenylacetyloxy, cinnamoyloxy, oleyloxycarbonyloxy, oleylaminocarbonyloxy, cyclohexylcarbonyloxy, or benzyloxycarbonyloxy,
• R.sub.2 is C.sub.1 -C.sub.4 -alkylene which is unsubstituted or substituted by chloro, bromo or hydroxy,
• Y is halo, phenoxy, C.sub.1 -C.sub.4 -alkoxy, formyloxy, C.sub.1 -C.sub.4 -alkylcarbonyloxy, C.sub.1 -C.sub.4 -alkoxycarbonyloxy or C.sub.1 -C.sub.4 -alkylaminocarbonyloxy, and
• R.sub.3 and ph are independently phenyl or phenyl substituted by nitro, chloro, bromo, C.sub.1 -C.sub.2 -alkoxy or C.sub.1 -C.sub.2 -alkyl, and
• R.sub.3 additionally represents hydrogen.