Patent ID: 7384432

Claim:
A secondary para-phenylenediamine compound chosen from: tert-Butyl 3-(4-aminophenylamino)propionate; 3-[4-Amino-2-(2-hydroxyethoxy)phenylamino]propionic acid; Diethyl 2-(4-aminophenylamino)pentanedioate; Dimethyl 2-(4-aminophenylamino)succinate; Ethyl 3-(4-aminophenylamino)butyrate; Ethyl 4-(4-aminophenylamino)butyrate; Methyl 6-(4-aminophenylamino)hexanoate; Dimethyl 2-(4-aminophenylamino)pentanedioate; Methyl 4-(4-aminophenylamino)butyrate; di-tert-Butyl 2-(4-aminophenylamino)pentanedioate; Ethyl 3-(4-aminophenylamino)propionate; Methyl 3-(4-aminophenylamino)propionate; 6-(4-Amino-2-methylphenylamino)hexanoic acid; 3-(4-Amino-2-methylphenylamino)propionic acid; Diethyl 2-(4-amino-2-methylphenylamino)pentanedioate; Dimethyl 2-(4-amino-2-methylphenylamino)succinate; Ethyl 3-(4-amino-2-methylphenylamino)butyrate; Ethyl 4-(4-amino-2-methylphenylamino)butyrate; Methyl 6-(4-amino-2-methylphenylamino)hexanoate; Dimethyl 2-(4-amino-2-methylphenylamino)pentanedioate; Methyl 4-(4-amino-2-methylphenylamino)butyrate; di-tert-Butyl 2-(4-amino-2-methylphenylamino)pentanedioate; Ethyl 3-(4-amino-2-methylphenylamino)propionate; Methyl 3-(4-amino-2-methylphenylamino)propionate; tert-Butyl 3-(4-amino-2-methylphenylamino)propionate; Ethyl 2-(4-aminophenylamino)-3-methylbutyrate; 6-(4-Amino-3-methylphenylamino)hexanoic acid; Diethyl 2-(4-amino-3-methylphenylamino)pentanedioate; Dimethyl 2-(4-amino-3-methylphenylamino)succinate; Ethyl 3-(4-amino-3-methylphenylamino)butyrate; Ethyl 4-(4-amino-3-methylphenylamino)butyrate; Methyl 6-(4-amino-3-methylphenylamino)hexanoate; Dimethyl 2-(4-amino-3-methylphenylamino)pentanedioate; Methyl 4-(4-amino-3-methylphenylamino)butyrate; di-tert-Butyl 2-(4-amino-3-methylphenylamino)pentanedioate; Ethyl 3-(4-amino-3-methylphenylamino)propionate; Methyl 3-(4-amino-3-methylphenylamino)propionate; tert-Butyl 3-(4-amino-3-methylphenylamino)propionate; tert-Butyl 2-(4-aminophenylamino)propionate; and the addition salts thereof.