Acyl and carbamimidoyl alkanediamines

Synthetically produced substantially pure biologically active compounds having the general formula wherein R1 is C1-C20 alkyl, alkenyl, aryl, aralkyl, cycloalkyl, alkylcycloalkyl, cycloalkylalkyl, cycloalkenyl, alkylcycloalkenyl, or cycloalkenylalkyl; R2 is hydrogen, C1-C10 alkyl or an amide-substituted alkyl having up to 10 carbon atoms; R3 is a cyclic, straight or branched chain hydrocarbon group having 2-12 carbon atoms, particularly -(CH2)n-, wherein n is 2-12; or R2 and R3 are linked together to form an alkylene chain; and R4 is selected from (substituted or unsubstituted carbamimidoyl), (dimethylpyrimidyl), or (carbamyl) wherein each of R5, R6, and R7 is hydrogen or the same or different C1-C8 alkyl group. The compounds are useful as bactericides for a wide variety of bacteria, including S.pyogenes, B.subtilis, K.pneumoniae, M.avium, B.fragilis, C.perfringens and C.albicans.