Patent ID: 7439395

Claim:
A process for the preparation of guanidinium salts of the formula (1) in which the substituents R in each case, independently of one another, have the meaning of hydrogen, straight-chain or branched alkyl having 1-20 C atoms, saturated, partially or fully unsaturated cycloalkyl having 3-7 C atoms, which may be substituted by alkyl groups having 1-6 C atoms, where one or more substituents R may be partially or fully substituted by halogen or partially by CN or NO 2 and halogen denotes F, Cl, Br or I, where up to four substituents R may be bonded to one another in pairs by a single or double bond and where a carbon atom or two non-adjacent carbon atoms of one or more substituents R may be replaced by atoms and/or atom groups selected from the group —O—, —C(O)—, —C(O)O—, —S—, —S(O)—, —SO 2 —, —SO 3 —, —N=, —N=N—, —NH—, —NR′—, —PR′—, —P(O)R′—, —P(O)R′—O—, —O—P(O)R′—O—, and —P(R′) 2 ═N—, where R′ denotes non-fluorinated, partially or perfluorinated alkyl having 1-6 C atoms, saturated or partially unsaturated cycloalkyl having 3-7 C atoms, unsubstituted or substituted phenyl or an unsubstituted or substituted heterocycle and A − is a sulfonate, alkyl- or arylsulfate, hydrogensulfate, imide, methanide, carboxylate, phosphate, phosphinate, phosphonate, borate, thiocyanate, perchlorate, fluorosilicate or nitrate, by reaction of a compound of the formula (2) in which the substituents R have a meaning indicated for formula (1) and X denotes F, Cl or Br, with a compound of the formula (3) Kt + A − (3), in which A − has a meaning indicated for formula (1) and Kt + can be a proton, R″ 3 Si, an alkali or alkaline earth metal cation, an ammonium cation, a phosphonium cation or a cation from group 11 or 12, where R″ in each case, independently of one another, denotes phenyl or a linear or branched alkyl group having 1-6 C atoms, which maybe substituted by phenyl, and subsequent reaction of the resultant compound of the formula (4) where the substituents R, X and A − have a meaning indicated for formula (1) or (2), with compounds of the formula (5) where the substituents R have a meaning indicated for formula (1) and M denotes hydrogen, R″ 3 Si, an alkali or alkaline earth metal and R″ in each case, independently of one another, denotes phenyl or a linear or branched alkyl group having 1-6 C atoms, which may be substituted by phenyl.