Patent ID: 7842832

Claim:
A β-amino-α-cyanoacrylate of formula I where the variables have the following meanings: R 1 is n-C 1 -C 6 -alkyl, n-C 3 -C 6 -alkenyl or C 1 -C 6 -alkoxy-C 1 -C 4 -alkyl; R 2 , R 3 are C 1 -C 6 -alkyl, which may be partially or fully halogenated and/or may carry a substituent from the group consisting of cyano, C 1 -C 6 -alkoxy, C 1 -C 6 -haloalkoxy, C 1 -C 6 -alkylthio, C 1 -C 6 -haloalkylthio, C 1 -C 6 -alkylsulfinyl, C 1 -C 6 -haloalkylsulfinyl, C 1 -C 6 -alkylsulfonyl and C 1 -C 6 -haloalkylsulfonyl, are C 2 -C 6 -alkenyl or C 2 -C 6 -alkynyl; R 4 is hydrogen, halogen, cyano or C 1 -C 6 -alkyl, where, if R 1 is n-C 1 -C 6 -alkyl, the substituents R 2 , R 3 and R 4 or two of the radicals R 2 , R 3 and R 4 are not simultaneously methyl, or an agriculturally useful salt thereof.