Patent ID: 6919462

Claim:
A process for the preparation of a compound having the formula: wherein: W is —CR 4 ; R 1 is halogen, haloalkyl, haloalkoxy, R 5 S(O) n — or —SF 5 ; R 2 is hydrogen or halogen; R 3 is hydrogen or R 6 S(O) m —; R 4 is halogen; each of R 5 and R 6 is alkyl or haloalkyl; and each of m and n is 0, 1 or 2; said process comprising reacting a compound having the formula: wherein R 1 , R 2 , R 3 and W are as defined above, R 7 is a leaving group and R 8 is chlorine or bromine, with a cyanide salt.