摘要:
Anthraquinone dyestuffs of the formula ##STR1## in which R.sub.1 represents alkyl, aralkyl, --CO--X-alkyl, --CO-- X-aralkyl, --CO--X-aryl, --O-alkyl, --O-aralkyl, --O-- aryl, --CN, --NO.sub.2, --CF.sub.3, halogen or a heterocyclic radical andR.sub.2 represents H or R.sub.1,X representing O, S, NH or a direct bond andY.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 denoting hydrogen, --NH.sub.2, --OH, halogen, --NO.sub.2 or an arylmercapto group and at least one of the substituents Y.sub.1 -Y.sub.4 representing an arylmercapto group,it being also possible for the alkyl, aryl, aralkyl and heterocyclic radicals mentioned for R.sub.1 and Y.sub.1 -Y.sub.4 to be substituted, the preparation and use thereof, and dichroic material containing these anthraquinone dyestuffs.
摘要:
Dyestuffs of the formula ##STR1## in which Y.sub.1, Y.sub.2, Y.sub.3, Y.sub.4 designate hydrogen, halogen, nitro, amino, alkylamino, arylamino, cycloalkylamino, aralkylamino, alkylthio, arylthio, cycloalkylthio, aralkylthio or hydroxyl, it being possible for the hydrocarbon radicals to be sustituted, with the proviso that(a) at least one of the substituents Y.sub.1, Y.sub.2, Y.sub.3 or Y.sub.4 does not denote hydrogen,(b) a maximum of two of the substituents Y.sub.1, Y.sub.2, Y.sub.3 and Y.sub.4 designate halogen and either(c.sub.1) X.sub.1, X.sub.3 represent halogen, --R.sub.1, --OR.sub.1 or --SR.sub.1, R.sub.1 denoting optionally substituted alkyl, it being possible for the alkyl chain to be substituted by an oxygen atom or several non-adjacent oxygen atoms, optionally substituted aryl, optionally substituted cycloalkyl, optionally substituted aralkyl or an optionally substituted heterocyclic radical and X.sub.2 designating hydrogen, or(c.sub.2) X.sub.1, X.sub.2 denote halogen, ##STR2## m' designating 0, 1, 2, or 3, m designating 0, 2 or 3,R.sub.2 designating halogen, --CF.sub.3, --CN, --OR.sub.1, --SR.sub.1, --R.sub.1, ##STR3## R.sub.3 designating hydrogen or R.sub.2 and R.sub.4 designating hydrogen, alkyl, halogen, alkoxy or --CO.sub.2 R.sub.1 andX.sub.3 representing hydrogen, or(c.sub.3) X.sub.1 designates halogen,X.sub.2 designates --OR.sub.1 or --SR.sub.1 andX.sub.3 designates hydrogen,their preparation and use and dichroic material containing these anthraquinone dyestuffs.
摘要:
Anthraquinone dyestuffs of the formula ##STR1## in which R.sub.1 and R.sub.2 denote hydrogen, alkyl, cycloalkyl, aryl or aralkyl, and the said hydrocarbon radicals can be substituted, andQ denotes an aryl radical or heterocyclic radical or an --OR', --SR', --CH.dbd.N--R', ##STR2## --CHO or --SO.sub.2 --O--R' radical, whereinR' represents an aryl, aralkyl or heterocyclic radical, and the radicals mentioned for R' can be substituted,processes for their preparation, and liquid-crystalline materials containing anthraquinone dyestuffs.