New benzisothiazole azo dyestuff cpds. for dyeing polyamide and prepn. - with lilolidine, julolidine or tetra:hydro-pyrido:benzoxazine azoic coupler

摘要

New azo dyestuffs are 2,1-benzisothiazole (3-azo-8) liloidine, (3-azo-9) julolidine or (3-azo-9) 2,3,6,7-tetrahydro- 5H-pyrido-(1,2,3-de)-1,4-benzoxazine cpds. of formula (I): R1-2 independently = H, (substd.) 1-8C alkyl, (substd.) phenyl, halogen, -SO3H, 1-4C alkylsulphonyl, phenyl-sulphonyl, NO2 or CN; R3 = H, halogen, (substd.) 1-8C alkyl, 1-8C alkoxy, phenoxy or 2-4C alkanoylamino; R4 = H or (substd.) 1-8C alkyl; R5 = H, (substd.) 1-8C alkyl, OH, 1-8C alkoxy, SO3H, OSO3H or S2O3H; X = a direct bond, -O- or -CHR6-; and R6 = H or (substd.) 1-8C alkyl. (I) contains at least one sulpho or (thio)sulphato gp.. The prepn. of (I) is claimed. USE/ADVANTAGE - (I) are claimed for use in dyeing or printing esp. of natural or synthetic polyamide materials. They are suitable for dyeing and printing fibres contg. N or OH gps. including cellulose, esp. yarns and woven or knitted textiles, and give good general fastness.