Indolo:quinoxaline, benzothieno:quinoxaline and indeno:quinoxaline cpds. for use as disperse dyestuff - prepd. by heating 1-acyl-2-(4-amino:phenyl:imino)-3:di:cyano:vinyl-indoline cpd. to elevated temp. used esp. for polyester fibre dyeing

摘要

New dyestuffs (I) are 2-amino-6-acyl-6H-indolo(2,3-b) quinoxaline, 9-amino-(1)benzothieno (2,3-b)quinoxaline- 5,5-dioxide, 7-amino-11-dicyanovinyl-1-11H-indeno(1,2-b) quinoxaline or 7-amino-11H-indeno(1,2-b) quinoxalin-11-one cpds. of the formula (I) (where X = N-CO-R1, SO2, C=C(CN)2 or C=O; R1 = alkyl or aryl; R3 = H, alkoxy, aryloxy, alkylthio or arylthio; R4 and R5 = H, alkyl or aralkyl; and R6 = H; or R3 + R4 + N + the 2 adjacent C atoms = a 5-6-membered ring, opt. with a condensed benzene ring; or NR4R5 = a 5-6-membered ring; or R5 + R6 + N + the 2 adjacent C atoms = a 5-6-membered ring; R7 = H, alkyl, OH, alkoxy, halogen or NO2). (I) are prepd. (claimed) by heating a 1-acyl-2-(4-amino-phenylimino) -3-dicyanovinyl-indoline cpd. of the formula (IV) where (R2 = NH2, acylamino or arylamino; pref. 1-4 C alkylcarbonylamino or phenylcarbonylamino) to elevated temp. USE/ADVANTAGE - (I) are claimed for use as disperse dyestuffs for dyeing or printing (semi)synthetic hydrophobic fibre material, esp. textiles, partic. polyester fibres. Pref. polyesters are PET and those derived from terephthalic acid and 1,4-bis-(hydroxymethyl)-cyclohexane. (I) are also suitable for dyeing cellulose 21/2- and tri-acetate, polycarbonates, e.g. bisphenol A polycarbonate, PVC and polyamides and have a very good reserve for wool and cotton, making them suitable for dyeing polyester/wool and polyester/cellulose fabrics. (I) give level violet to yellow hues with good fastness and can be used with other dyestuffs. (I) are also suitable for thermal transfer printing.