Patent ID: 7199246

Claim:
A process for the preparation of a compound of general formula (I) wherein R 1 is CN or CSNH 2 ; R 2 is hydrogen or chloro; X is N or CR 4 ; R 4 is hydrogen or chloro; n is 0, 1 or 2; and R 3 is halo, haloalkyl, haloalkoxy or SF 5 ; which process comprises: (i) reacting a compound of the formula (III) wherein R 1 is CN or CSNH 2 ; R 2 is hydrogen or chloro; X is N or CR 4 ; R 4 is hydrogen or chloro; n is 0, 1 or 2; and R 3 is halo, haloalkyl, haloalkoxy or SF 5 ; with a quaternary ammonium salt to form a compound of the formula (II): wherein R 1 , R 2 , X, n and R 3 are as defined above; and (ii) reacting a compound of the formula (II) with a proton source.