| abstract |
The invention relates to a method for producing an intermediate product containing a heterocyclic quarternary ammonium and/or guanidium cation, for the synthesis of heterocyclic quaternary ammonium and/or guanidium compounds. According to said method, heterocyclic quaternary ammonium and/or guanidium carboxylates are oxidised with an oxidising agent in the presence of a metal from groups 8 to 10 of the periodical table, at a temperature of between 0 and 250 °C and a pressure of between 0.05 and 20 MPa abs. |