Process for preparing azo dyes

Claim 2

The process for coupling a disperse dye diazo component selected from substituted and unsubstituted phenyl, 2-thiazolyl, 2-benzothiazolyl, 1,3,4-thiadiazol-2-yl, 1,2,4-thiadiazol-5-yl, 2,1-benzisothiazol-3-yl, isothiazol-5-yl, 1,3,4-triazol-2-yl, pyrazol-5-yl, imidazol-2-yl, phthalimid-3 or 4-yl, 1-naphthyl, and 2-thienyl diazonium salts with disperse dye couplers comprising carrying out the coupling with a disperse dye coupler having in the coupling position on the ring a displaceable substituent other than hydrogen.

Claim 3

The process of claim 1 comprising carrying out the coupling with a disperse dye coupler having in the coupling position on the ring a displaceable substituent selected from --COOH, --CH 2 OH, --SO 3 H, ##STR15## wherein R is selected from --H, straight and branched alkyl of 1-6 carbons, phenyl and phenyl substituted with 1-3 alkyl groups of 1-6 carbons, --Cl, --Br, and --I, ##STR16## and Ar--R 17 -- where Ar is an aniline, tetrahydroquinoline, or benzomorpholine coupler which may be the same as the coupler to which this substituent is attached, or different therefrom, R 15 is a group selected from alkylene of 1-6 carbons, phenylene and cycloalkylene of 4-8 carbons, and R 17 is straight or branched alkylane of 1-6 carbons, and the groups ##STR17## wherein R 1 is hydrogen, lower alkyl, lower alkoxy, cyano, nitro, halogen, lower alkylsulfonyl, or lower alkoxycarbonyl; R 2 is hydrogen, lower alkyl, lower alkoxy, cyano, nitro, lower alkylsulfonyl, lower alkoxycarbonyl, trifluoromethyl, or thiocyanato; R 3 is lower alkyl, lower alkoxy, lower alkylthio, cyclohexylthio, phenylthio, lower alkylsulfonyl, or lower alkoxycarbonyl; R 4 is lower alkyl, lower alkoxy, lower alkylthio or lower alkylsulfonyl; R 5 is lower alkyl, lower alkoxy, nitro, lower alkanoyl, benzoyl, lower alkylbenzoyl, lower alkoxybenzoyl, halobenzoyl, or nitrobenzoyl; R 6 is hydrogen, lower alkyl, lower alkoxy, cyano, lower alkanoyl, aryl, substituted aryl, or alkyl; R 7 is hydrogen, lower alkyl, lower alkoxy, cyano, carbamoyl, substituted carbamoyl, or carboalkoxy; m is 1 or 2 and n is 1-3.

Claim 4

The process of claim 1 wherein said diazo component is selected from ##STR18## and the coupler is selected from ##STR19## wherein Z is selected from --CHO, --COOH, --CH 2 OH and --SO 3 H.

Claim 5

The process of claim 1 wherein the diazo component is the diazonium salt of 4-trifluoromethyl-2-aminobenzothiazole, the coupler is N,N-diethylaniline, and the displaceable substituent is a carboxyl or formyl group.

Claim 6

The process of claim 1 wherein the diazo component is the diazonium salt of 5-nitro-2-aminothiazole, the coupler is N,N-diethylaniline, and the displaceable substituent is a carboxyl or formyl group.

Claim 7

The process of claim 1 wherein the diazo component is the diazonium salt of 5-nitro-2-aminothiazole, the coupler is 3-methyl-N-ethyl-N-2,3-dihydroxypropylaniline, and the displaceable substituent is a carboxyl or formyl group.