Novel monoazo and disazo colorants
AssigneeSterling Drug Inc.
InventorNathan N. Crounse
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Abstract
This invention relates to novel (N-substituted sulfonamido) monoazo and disazo compounds, to acid-addition salts of said azo compounds which are useful as direct dyes particularly in the dyeing of cellulose, to novel (N-substituted sulfonamido) substituted nitrobenzene, aniline and acetanilide intermediates to said azo compounds and to methods of preparation of said azo compounds and said intermediates to said azo compounds.
Claims8
A (N-substituted sulfonamido) monoazo compound having the formula ##STR41## in which R.sup.1 represents alkylene-NH-alkylene-NH.sub.2 in which alkylene represents --CH.sub.2 CH.sub.2 -- and --CH.sub.2 CH.sub.2 CH.sub.2 --;
- R.sup.2 represents hydrogen, C.sub.1 to C.sub.3 alkyl or C.sub.1 to C.sub.3 alkoxy;
- R.sup.5 represents hydrogen, or ##STR42## in which R.sup.o represents hydrogen, C.sub.1 to C.sub.3 alkyl or C.sub.1 to C.sub.3 alkoxy;
- or
- the acid-addition salt forms of said monoazo compounds.
Dependencies are inferred from the claim text.