Monoazo compounds from 3-aminobenzisothiazoles and substituted .alpha.-naphthylamine couplers

A compound having the formula ##SPC5##

• wherein
• R.sup.1 and R.sup.2 each is hydrogen, lower alkyl, lower alkoxy, chlorine or bromine;
• R.sup.3 is cyclohexyl;
• lower alkyl cyclohexyl;
• aryl;
• alkyl of one to about six carbon atoms substituted with hydroxy, lower alkoxy, lower cyanoalkoxy, lower hydroxyalkoxy, cyano, halogen, aryl, aryloxy, cyclohexyl, lower alkylcyclohexyl, hydroxymethylcyclohexyl, R.sup.6 --CONHCH.sub.2 -cyclohexyl, R.sup.7 OOCNHCH.sub.2 -cyclohexyl, R.sup.7 SO.sub.2 N(R.sup.8)CH.sub.2 -cyclohexyl, pyrrolidinono, lower alkylpyrrolidinono, phthalimidino, --N(R.sup.8)CO--R.sup.6, --NHCOO--R.sup.7, --N(R.sup.8)SO.sub.2 R.sup.7, --OOC--R.sup.6, --COO--R.sup.7, --CONR.sup.9 R.sup.10, ##EQU2## or --CH.sub.2 CH(R.sup.11)--[OCH.sub.2 CH(R.sup.11)].sub.n --R.sup.12 ;
• R.sup.4 is hydrogen, lower alkyl or lower alkoxy;
• and
• R.sup.5 is hydrogen, lower alkyl, lower alkoxy, hydroxy, --NHCO--R.sup.6, --NHCOO--R.sup.7 or --NHSO.sub.2 --R.sup.7, in which
• R.sup.6 is hydrogen;
• lower alkyl;
• lower alkyl substituted with halogen, hydroxy, lower alkoxy or aryl;
• aryl;
• lower alkylamino;
• or arylamino;
• R.sup.7 is lower alkyl;
• R.sup.8 is hydrogen or lower alkyl;
• R.sup.9 individually is hydrogen or lower alkyl;
• R.sup.10 individually is hydrogen or lower alkyl;
• R.sup.9 and R.sup.10 in combination are pentamethylene or ethyleneoxyethylene;
• R.sup.11 is hydrogen or methyl;
• n is 1, 2 or 3;
• and
• R.sup.12 is hydrogen or hydroxy;
• and
• each aryl as well as the aryl moiety of each aryloxy and arylamino is phenyl or phenyl substituted with lower alkyl, lower hydroxyalkyl, lower alkoxy, or chlorine.