Certain 2-amino-nicotinonitrile derivatives

A compound of the formula ##SPC36##

• wherein X is alkyl having 1 to 6 carbon atoms, alkenyl having 2 to 6 carbon atoms, cycloalkyl having 3 to 8 carbon atoms, phenyl, benzyl, phenethyl, one of said radicals substituted as hereinafter defined or hydrogen;
• Z.sub.1 is ##EQU25## --NH--OR.sub.10 or ##EQU26## and Z.sub.2 is mercapto, --SR.sub.12 or --SO.sub.2 R.sub.12 ;
• R.sub.5 and R.sub.6, are alkyl having 1 to 6 carbon atoms, cycloalkyl having 3 to 8 carbon atoms, phenyl, benzyl, phenethyl, one of said radicals substituted as hereinafter defined or hydrogen;
• R.sub.10 is alkyl having 1 to 6 carbon atoms, benzyl, phenethyl, one of said groups substituted as hereinafter defined or hydrogen;
• R.sub.11 is alkyl having 1 to 6 carbon atoms or said alkyl substituted as hereinafter defined;
• R.sub.12 is alkyl having 1 to 6 carbon atoms, alkenyl having 2 to 6 carbon atoms, cycloalkyl having 3 to 8 carbon atoms, phenyl, benzyl, phenethyl or one of said radicals substituted as hereinafter defined, the substituents for the substituted alkyl or alkenyl radicals specified hereinabove being selected from the group consisting of cyano, hydroxy, acetoxy, alkoxy having 1 to 2 carbon atoms, phenoxy and phenoxyacetoxy and the substituents for the substituted cycloalkyl, phenyl, benzyl and phenethyl radicals specified hereinabove being selected from the group consisting of bromine, chlorine, cyano, alkyl having 1 to 3 carbon atoms and alkoxy having 1 to 2 carbon atoms.