Patent ID: 7795442

Claim:
A process for the preparation of a compound of the formula wherein Q is CH or N; Y is NO 2 or CN; Z is CHR 6 , O, NR 6 or S, R 4 and R 5 are either each independently of the other hydrogen or unsubstituted or R 7 -substituted alkyl, or together form an alkylene bridge having two or three carbon atoms, and said alkylene bridge may additionally contain a hetero atom selected from the group consisting of NR 8 , O and S; R 6 is H or unsubstituted or R 7 -substituted alkyl, R 7 is unsubstituted or substituted aryl or heteroaryl, and R 8 is H or C 1 -C 12 alkyl; which comprises reacting a compound of formula (I) wherein X is a leaving group; R is unsubstituted or substituted C 1 -C 12 alkyl or unsubstituted or substituted aryl, with a compound of the formula wherein Q, Y, Z, R 4 and R 5 are as defined above for formula (A), to form a compound of the formula wherein R is as defined above for formula (I), and Q, Y, Z, R 4 and R 5 are as defined above for formula (A), and converting the compound of formula (C) by means of a halogenating agent into a compound of formula (A).