An essentially anhydrous agitated mixture of (i) finely-divided essentially anhydrous alkali metal fluoride (e.g., KF), (ii) haloaromatic compound having at least one halogen atom of atomic number greater than 9 on an aromatic ring (e.g., C
6
Cl
6
), and (iii) an organo guanidinium salt catalyst (e.g., [(Et
2
N)
2
CNEt
2
]Br), is heated at a temperature at which fluorine replaces one or more of the ring halogen atoms of the haloaromatic compound. A new synthetic route to hexahydrocarbyl guanidinium salts is also described.
Process for the preparation of organo guanidinium salts
申请人:Chordip Ltd.
公开号:EP1288196A1
公开(公告)日:2003-03-05
A process for the preparation of monovalent or divalent organo guanidinium salts is described. If the product is a monovalent organo guanidinium salt, the process comprises mixing together a halohydrocarbon, an inorganic base, and a salt of unsubstituted guanidine. If the product is a divalent organo guanidinium compound, the process comprises mixing together a first halohydrocarbon, an inorganic base, and a salt of unsubstituted guanidine, followed by mixing of a second halohydrocarbon with the mixture so formed; this is followed by the mixing of a third halohydrocarbon with the mixture formed from the mixing of the second halohydrocarbon. Both processes do not require the absence of water; the use of an organic solvent is optional.