abstract |
The present invention relates to a process for the preparation of a compound of the formula: in which: - W represents a -COOR group or a -CN radical; - R1 represents a hydrogen or halogen atom, or a (C1-C4) alkyl group; - R2 R3, R4, R5, R6, R7 each independently represents a hydrogen or halogen atom, or a (C1-C4) alkyl, (C1-C4) alkoxy or trifluoromethyl group; - R represents a (C1-C4) alkyl or benzyl group. |