Phenyl hydroxamic acids including a hetero-containing substituent

A compound of the formula ##STR63## wherein X and Y are each independently selected from NR, sulfur, S(O).sub.g or a single bond, where R can be hydrogen, substituted alkyl or lower alkyl, g can be 1 or 2 and with the proviso that at least one of X and Y is other than a single bond;

• Z is cycloalkyl, phenyl or naphthyl or substituted phenyl or substituted naphthyl wherein the substituents are selected from 1 or 2 halogens, 1 or 2 lower alkoxy groups, 1 or 2 hydroxyl groups, 1 or 2 alkylamine groups, 1 or 2 alkanoylamino groups, 1 or 2 amino groups, 1 or 2 nitro groups, 1 or 2 cyano groups, 1 or 2 thiol groups or 1 or 2 alkylthio groups;
• R.sub.1 is lower alkyl, substituted alkyl, cycloalkyl, lower alkenyl, phenyl or naphthyl or substituted phenyl or substituted naphthyl wherein the substituents are selected from 1 or 2 halogens, 1 or 2 lower alkoxy groups, 1 or 2 hydroxyl groups, 1 or 2 alkylamine groups, 1 or 2 alkanoylamino groups, 1 or 2 amino groups, 1 or 2 nitro groups, 1 or 2 cyano groups, 1 or 2 thiol groups or 1 or 2 alkylthio groups;
• R.sub.2 is hydrogen, lower alkyl, substituted alkyl, aroyl or acyl;
• m is an integer from 1 to 4;
• and,
• n is zero or an integer from 1 to 4.