Patent ID: 6841696

Claim:
A process for preparing amidinium salts of the general formula (V), comprising (a) reacting carboxamides of the general formula (I) in which n is 1 or 2 and, depending on n, for n=1 R 1 is C 1 -C 12 -alkyl, C 2 -C 8 -alkenyl, C 1 -C 12 -haloalkyl or C 7 -C 12 -arylalkyl or substituents of the general formula (II) -A-B-D (II) in which, independently of one another, A is a C 1 -C 4 -alkylene radical and B is a carbonyl group and D is R 2 or OR 2 , where R 2 is C 1 -C 6 -alkyl, or B and D together are a cyano group, and for n=2 R 1 is C 1 -C 6 -alkylene or C 2 -C 6 -alkenylene, with a sulphuric diester of the general formula (III) in which the R 3 radicals are each, independently of one another, C 1 -C 6 -alkyl, to give imidic ester alkyl sulphates of the general formula (IV) in which n, R 1 and, in each case independently of one another, the R 3 radicals have the above-mentioned meaning, and b) reacting the imidic ester alkyl sulphates of the general formula (IV) with ammonia to give the amidinium alkyl sulphates of the general formula (V). in which n, R 1 and, in each case independently of one another, the R 3 radicals have the above-mentioned meaning.