Heterocyclic azo dyes

Abstract

Novel compounds of the general formula I ##STR1## where X is hydrogen, nitro or unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aryl or hetaryl, Y is cyano, nitro, alkanoyl, aroyl, alkylsulfonyl, arylsulfonyl, carboxyl, a carboxylic ester group or unsubstituted or substituted carbamyl, R is unsubstituted or substituted alkyl or aryl, R.sup.1 is hydrogen or R.sup.2, and R.sup.2 is unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aralkyl or aryl, are useful for dyeing textile fibers, in particular polyesters.

Description

The present invention relates to compounds of the general formula: ##STR2## where X is hydrogen, nitro or unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aryl or hetaryl, Y is cyano, nitro, alkanoyl, aroyl, alkylsulfonyl, arylsulfonyl, carboxyl, a carboxylic ester group or unsubstituted or substituted carbamyl, R is unsubstituted or substituted alkyl or aryl, R.sup.1 is hydrogen or R.sup.2, and R.sup.2 is unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aralkyl or aryl.

X is hydrogen or, for example, C.sub.1 -C.sub.8 -alkyl which may be substituted by chlorine, bromine or phenyl, or thienyl, furyl or phenyl which is unsubstituted or substituted by chlorine, bromine, methyl, ethyl, methoxy, ethoxy or nitro.

Specific examples of alkyl radicals are: CH.sub.3, C.sub.2 H.sub.5, C.sub.3 H.sub.7, C.sub.4 H.sub.9, C.sub.5 H.sub.11, C.sub.6 H.sub.13, C.sub.8 H.sub.17 and ##STR3## the abbreviated formula also embracing the n- and isoradicals. Specific examples of radicals Y in addition to those stated above are: CH.sub.3 CO, C.sub.2 H.sub.5 CO, C.sub.3 H.sub.7 CO, C.sub.4 H.sub.9 CO, C.sub.5 H.sub.11 CO, C.sub.7 H.sub.15 CO, ##STR4## C.sub.6 H.sub.5 CO, CH.sub.3 C.sub.6 H.sub.4 CO, ClC.sub.6 H.sub.4 CO, (CH.sub.3).sub.2 C.sub.6 H.sub.3 CO, H.sub.3 COC.sub.6 H.sub.4 CO, Cl.sub.2 C.sub.6 H.sub.3 CO, CH.sub.3 SO.sub.2, C.sub.2 H.sub.5 SO.sub.2, C.sub.4 H.sub.9 SO.sub.2, C.sub.6 H.sub.5 SO.sub.2, CH.sub.3 C.sub.6 H.sub.4 SO.sub.2, ClC.sub.6 H.sub.4 SO.sub.2, COOCH.sub.3, COOC.sub.2 H.sub.5, COOC.sub.3 H.sub.7, COOC.sub.4 H.sub.9, COOC.sub.6 H.sub.13, COOC.sub.8 H.sub.17, ##STR5## COOC.sub.2 H.sub.4 OCH.sub.3, COOC.sub.2 H.sub.4 OC.sub.2 H.sub.5, COOC.sub.2 H.sub.4 OC.sub.4 H.sub.9, COOC.sub.6 H.sub.5, COOC.sub.6 H.sub.4 CH.sub.3, CONH.sub.2, CONHCH.sub.3, CONHC.sub.2 H.sub.5, CONHC.sub.4 H.sub.9, CONHC.sub.6 H.sub.13, CONHC.sub.8 H.sub.17, CON(CH.sub.3).sub.2, CON(C.sub.2 H.sub.5).sub.2, CON(C.sub.4 H.sub.9).sub.2, ##STR6##

R is, for example, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxycarbonylmethyl, cyanomethyl, benzyl or phenyl which is mono-substituted or polysubstituted by C.sub.1 -C.sub.10 -alkyl, C.sub.1 -C.sub.10 -alkoxy, phenoxy, benzyloxy, phenyl, chlorine, bromine, nitro, C.sub.1 -C.sub.4 -alkoxycarbonyl, C.sub.1 -C.sub.4 -mono- or dialkylamino, C.sub.1 -C.sub.4 -alkoxyethoxy, C.sub.1 -C.sub.4 -alkylmercapto, phenylmercapto or C.sub.1 -C.sub.5 -alkanoylamino, such as acetylamino, propionylamino, butyrylamino or valerylamino.

In addition to the radicals stated above, R.sup.2 is, for example, C.sub.1 -C.sub.6 -alkyl which may be substituted by chlorine, bromine, hydroxyl, C.sub.1 -C.sub.8 -alkoxy, phenoxy, cyano, carboxyl, C.sub.1 -C.sub.8 -alkanoyloxy, C.sub.1 -C.sub.8 -alkoxy-C.sub.1 -C.sub.4 -alkoxy, benzoyloxy, o-, m- or p-methylbenzoyloxy, o-, m- or p-chlorobenzoyloxy, C.sub.1 -C.sub.8 -alkoxyalkanoyloxy, phenoxyalkanoyloxy, C.sub.1 -C.sub.8 -alkoxycarbonyloxy, C.sub.1 -C.sub.8 -alkoxyalkoxycarbonyloxy, benzyloxycarbonyloxy, phenethyloxycarbonyloxy, phenoxyethoxycarbonyloxy, C.sub.1 -C.sub.8 -alkylaminocarbonyloxy, cyclohexylaminocarbonyloxy, phenylaminocarbonyloxy, C.sub.1 -C.sub.8 -alkoxycarbonyl, C.sub.1 -C.sub.8 -alkoxyalkoxycarbonyl, phenoxycarbonyl, benzyloxycarbonyl, phenoxy-C.sub.1 -C.sub.4 -alkoxy or phenethyloxycarbonyl, or is phenyl, benzyl, phenethyl or cyclohexyl.

Specific examples of radicals R.sup.2 are methyl, ethyl, propyl, butyl, pentyl, hexyl, allyl, methallyl, 2-chloroethyl, 2-bromoethyl, 2-cyanoethyl, 2-hydroxyethyl, 2-phenyl-2-hydroxyethyl, 2,3-dihydroxypropyl, 2-hydroxyporpyl, 2-hydroxybutyl, 2-hydroxy-3-phenoxypropyl, 2-hydroxy-3-methoxypropyl, 2-hydroxy-3-butoxypropyl, 3-hydroxypropyl, 2-methoxyethyl, 2-ethoxyethyl, 2-propoxyethyl, 2-butoxyethyl, 2-phenoxyethyl, 2-phenoxypropyl, 2-acetoxyethyl, 2-propionyloxyethyl, 2-butyryloxyethyl, 2-isobutyryloxyethyl, 2-methoxymethylcarbonyloxyethyl, 2-ethoxymethylcarbonyloxyethyl, 2-phenoxymethylcarbonyloxyethyl, 2-methoxycarbonyloxyethyl, 2-ethoxycarbonyloxyethyl, 2-propoxycarbonyloxyethyl, 2-butoxycarbonyloxyethyl, 2-phenyloxycarbonyloxyethyl, 2-benzyloxycarbonyloxyethyl, 2-methoxyethoxycarbonyloxyethyl, 2-ethoxyethoxycarbonyloxyethyl, 2-propoxyethoxycarbonyloxyethyl, 2-butoxyethoxycarbonyloxyethyl, 2-methylaminocarbonyloxyethyl, 2-ethylaminocarbonyloxyethyl, 2-propylaminocarbonyloxyethyl, 2-butylaminocarbonyloxyethyl, 2-methoxycarbonylethyl, 2-ethoxycarbonylethyl, 2-propoxycarbonylethyl, 2-butoxycarbonylethyl, 2-phenoxycarbonylethyl, 2-benzyloxycarbonylethyl, 2- -phenylethoxycarbonylethyl, 2-methoxyethoxycarbonylethyl, 2-ethoxyethoxy-carbonylethyl, 2-propoxyethoxycarbonyleythyl, 2-butoxyethoxycarbonylethyl, 2-phenoxyethoxycarbonylethyl and 2-benzoylethyl.

Specific examples of radicals R in addition to those stated above are phenyl, o-, m- and p-methylphenyl, o-, m- and p-ethylphenyl, o-, m- and p-methoxyphenyl, o-, m- and p-ethoxyphenyl, o-, m- and p-chlorophenyl, o-, m- and p-acetylaminophenyl, o-, m- and p-bromophenyl, o-, m- and p-nitrophenyl, (CH.sub.3).sub.2)C.sub.6 H.sub.3, (C.sub.2 H.sub.5).sub.2 C.sub.6 H.sub.3, Cl.sub.2 C.sub.6 H.sub.3, o- m- and p-propionylaminophenyl, o-, m- and p-butyrylaminophenyl, o-, m- and p-.beta.-cyanoethoxyphenyl, methyl, ethyl, n- and isopropyl, n-, iso- and sec.-butyl, allyl, methallyl, furyl and thienyl.

The compounds of the formula I have red to blue hues and are particularly useful for dyeing polyesters, nylons, cellulose esters and blends of polyesters and cellulose fibers. As a rule, the dyeings obtained have good or very good fastness properties, particularly on polyesters.

The compounds of the formula I can be prepared by reacting a diazonium compound of an amine of the formula ##STR7## with a compound of the formula ##STR8## by a conventional method. The Examples which follow illustrate the preparation. Parts and percentages are by weight, unless stated otherwise.

Of particular importance are compounds of the formula Ia ##STR9##

where X.sup.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl, or is thienyl, furyl or phenyl which is unsubstituted or substituted by methyl, ethyl, methoxy, ethoxy, chlorine, bromine, nitro or acylamino, B is phenyl which is unsubstituted or substituted by chlorine, bromine, C.sub.1 -C.sub.4 -alkoxy, -cyanoethoxy, methyl, ethyl or C.sub.1 -C.sub.4 -alkanoylamino, and B.sup.1 and B.sup.2 independently of one another are each benzyl, phenylethyl, cyclohexyl, allyl, chloroallyl, phenyl or C.sub.1 -C.sub.4 -alkyl which is unsubstituted or substituted by hydroxyl, cyano, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.8 -alkoxycarbonyl, C.sub.1 -C.sub.8 -alkanoyloxy, C.sub.1 -C.sub.4 -alkoxycarbonyloxy or C.sub.1 -C.sub.4 -alkylaminocarbonyloxy, and one of the radicals B.sup.1 or B.sup.2 may furthermore be hydrogen.

EXAMPLE 1

21.6 parts of 2-amino-3-cyano-4-phenyl-5-formylthiophene were introduced into a mixture of 150 parts of 3:1 glacial acetic acid/propionic acid and 70 parts of 85% strength sulfuric acid. 32 parts of nitrosylsulfuric acid (11.5% of N.sub.2 O.sub.3) were added dropwise at 0.degree.-5.degree. C., after which the mixture was stirred for 4 hours at this temperature.

24.0 parts of 2-diethylamino-4-phenyl-thiazole were dissolved in 100 parts of dimethylformamide, and the solution was introduced into 400 parts of ice and 2 parts of amidosulfonic acid. The diazo solution obtained previously was added in the course of 2 hours with external cooling with ice/water, and the mixture was stirred overnight without further cooling. The product was filtered off under suction, washed neutral with water and dried at 80.degree. C. in a drying oven under reduced pressure to give 40 parts of a bluish black powder of the formula ##STR10## which dyes polyester fabric in fast royal blue hues.

If 23.9 parts of 2-diethylamino-4-(2'-thienyl)-thiazole are used instead of 24 parts of 2-diethylamino-4-phenylthiazole and the procedure described above is followed, 42 arts of a bluish black powder are obtained, this powder dyeing polyester fibers in fast greenish-blue hues.

The dyes defined in the Table below are also obtained in a similar manner.

__________________________________________________________________________DNNK Hue onExample D K polyester__________________________________________________________________________ ##STR11## ##STR12## blue3 ##STR13## ##STR14## greenish blue4 ##STR15## ##STR16## blue5 ##STR17## ##STR18## blue6 ##STR19## ##STR20## reddish blue7 ##STR21## ##STR22## greenish blue8 ##STR23## ##STR24## blue9 ##STR25## ##STR26## greenish blue10 ##STR27## ##STR28## greenish blue11 ##STR29## ##STR30## blue12 ##STR31## ##STR32## green13 ##STR33## ##STR34## greenish blue14 ##STR35## ##STR36## blue15 ##STR37## ##STR38## greenish blue16 ##STR39## ##STR40## greenish blue17 ##STR41## ##STR42## greenish blue18 ##STR43## ##STR44## greenish blue19 ##STR45## ##STR46## greenish blue20 ##STR47## ##STR48## greenish blue21 ##STR49## ##STR50## blue22 ##STR51## ##STR52## blue23 ##STR53## ##STR54## blue24 ##STR55## ##STR56## blue25 ##STR57## ##STR58## blue26 ##STR59## ##STR60## blue27 ##STR61## ##STR62## blue28 ##STR63## ##STR64## blue29 ##STR65## ##STR66## blue30 ##STR67## ##STR68## blue31 ##STR69## ##STR70## blue32 ##STR71## ##STR72## blue33 ##STR73## ##STR74## blue34 ##STR75## ##STR76## blue35 ##STR77## ##STR78## blue36 ##STR79## ##STR80## blue37 ##STR81## ##STR82## blue38 ##STR83## ##STR84## blue39 ##STR85## ##STR86## blue40 ##STR87## ##STR88## blue41 ##STR89## ##STR90## blue42 ##STR91## ##STR92## violet43 ##STR93## ##STR94## blue44 ##STR95## ##STR96## blue45 ##STR97## ##STR98## blue46 ##STR99## ##STR100## blue47 ##STR101## ##STR102## blue48 ##STR103## ##STR104## blue49 ##STR105## ##STR106## blue50 ##STR107## ##STR108## blue51 ##STR109## ##STR110## blue52 ##STR111## ##STR112## blue53 ##STR113## ##STR114## blue54 ##STR115## ##STR116## blue55 ##STR117## ##STR118## bluish violet56 ##STR119## ##STR120## blue57 ##STR121## ##STR122## blue58 ##STR123## ##STR124## blue59 ##STR125## ##STR126## blue60 ##STR127## ##STR128## greenish blue61 ##STR129## ##STR130## blue62 ##STR131## ##STR132## blue63 ##STR133## ##STR134## blue64 ##STR135## ##STR136## blue65 ##STR137## ##STR138## blue__________________________________________________________________________

Claims

1. A compound of the formula I ##STR139## where X is hydrogen, nitro or unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aryl or hetaryl, Y is cyano, nitro, alkanoyl, aroyl, alkylsulfonyl, arylsulfonyl, carboxyl, a carboxylic ester group or unsubstituted or substituted carbamyl, R is unsubstituted or substituted alkyl or aryl, R.sup.1 is hydrogen or R.sup.2, and R.sup.2 is unsubstituted or substituted alkyl, alkenyl, cycloalkyl, aralkyl or aryl.

2. A compound as claimed in claim 1, of the formula ##STR140## where X.sup.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl or is thienyl, furyl or phenyl which is unsubstituted or substituted by methyl, ethyl, methoxy, ethoxy, chlorine, bromine, nitro or acylamino, B is phenyl which is unsubstituted or substituted by chlorine, bromine, C.sub.1 -C.sub.4 -alkoxy, -cyanoethoxy, methyl, ethyl or C.sub.1 -C.sub.4 -alkanoylamino, and B.sup.1 and B.sup.2 independently of one another are each benzyl, phenylethyl, cyclohexyl, allyl, chloroallyl, phenyl or C.sub.1 -C.sub.4 -alkyl which is unsubstituted or substituted by hydroxyl, cyano, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.8 -alkoxycarbonyl, C.sub.1 -C.sub.8 -alkanoyloxy, C.sub.1 -C.sub.4 -alkoxycarbonyloxy or C.sub.1 -C.sub.4 -alkylaminocarbonyloxy, and one of the radicals B.sup.1 or B.sup.2 may furthermore be hydrogen.

3. The compound of claim 1 wherein X is hydrogen, nitro, C.sub.1 -C.sub.8 alkyl which may be substituted by chlorine, bromine, or phenyl; or phenyl which is unsubstituted or substituted by nitro chlorine, bromine, methyl, ethyl, methoxy or ethoxy.

4. The compound of claim 1 wherein Y is cyano, carboxyl, a carboxylic ester group, alkylsulfonyl, CON(CH.sub.3).sub.2, or COCH.sub.3.

5. The compound of claim 1, wherein R is a phenyl which is unsubstituted, mono-substituted or poly-substituted by chlorine, bromine, methyl, nitro, methoxy or NHCOCH.sub.3.

6. The compound of claim 1 wherein R.sub.1 is hydrogen, or a C.sub.1 -C.sub.4 alkyl which is unsubstituted or substituted by cyano.

7. The compound of claim 1 wherien X is methyl, Y is cyano, R is phenyl and R.sub.1 and R.sub.2 are each ethyl.

8. The compound of claim 1 wherein X is hydrogen, Y is cyano, R is phenyl and R.sub.1 and R.sub.2 are each ethyl.