Patent ID: 6274770
Filing Date: 2001-08-14
Classification: C07C

Abstract:
A process for the preparation of a compound of general formula ##STR4##wherein Y and Z each independently represent a fluorine atom or a hydroxy group, and a, b, c and d independently represent 0, 1, 2 or 3 provided that the sum of a, b, c and d is 1, 2, 3 or 4, the process comprising treating a compound of general formula ##STR5##wherein a, b, c and d are as described above and L.sup.1 and L.sup.2 each independently represent a leaving group or a group which is oxidisable to a leaving group provided that either Y and L.sup.1 are different or Z and L.sup.2 are different, with a fluorinating system in the presence of oxygen.