Monofunctional n--(2--cyanoethenyl)sulfonamides

A compound having the structure:

• ##STR12## wherein R.sup.1 represents hydrogen;
• alkyl containing from 1 to 20 carbons;
• cyano, cycloalkyl containing from 3 to 18 carbons, unsubstituted aromatic ring systems, aromatic ring systems substituted with alkyl, halo, nitro, cyano, hydroxy, alkoxy, carboxy, carboalkoxy, amino, dialkylamino, acyl, trihalomethyl or alkysulfonyl;
• heteroaromatic ring systems (a) having a solitary ring or 2 to 3 linked or fused rings, and (b) containing from 3 to 34 carbons;
• alkanoyl;
• alkoxycarbonyl;
• aminocarbonyl;
• alkylaminocarbonyl;
• aralkylaminocarbonyl;
• alkylsulfonyl;
• aroyl;
• aryloxycarbonyl;
• arylaminocarbonyl;
• aroyl, aryloxycarbonyl, arylaminocarbonyl, aralkylaminocarbonyl, arylsulfonyl, arylsulfonyl substituted with alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl;
• R.sup.2 represents alkyl containing from 1 to 20 carbons, cycloalkyl containing from 3 to 18 carbons;
• unsubstituted aromatic ring systems;
• aromatic ring systems substituted with alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl;
• heteroaromatic ring systems (a) having a solitary ring or 2 to 3 linked or fused rings and (b) containing from 3 to 34 carbons;
• and
• R.sup.3 represents alkyl containing from 1 to 20 carbons, cycloalkyl containing from 3 to 18 carbons;
• unsubstituted aromatic ring systems;
• aromatic ring systems substituted with alkyl, hydroxy, alkoxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl or alkylsulfonyl;
• heteroaromatic ring systems (a) having a solitary ring or 2 to 3 linked or fused rings and (b) containing from 3 to 34 carbons, unsubstituted ethenyl, ethenyl substituted with alkyl containing from 1 to 20 carbons, aryl containing from 5 to 10 carbons or aryl substituted with alkyl, hydroxy, carboxy, carboalkoxy, nitro, halo, cyano, amino, dialkylamino, acyl, trihalomethyl, or alkylsulfonyl.