C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 255/32 (2006.01) C07C 253/30 (2006.01) C07C 255/35 (2006.01)
Patent
CA 2133374
Abstract 2,4,5-Trihalocinnamonitriles and process for their preparation 2,4,Trihalocinnamonitriles of the formula I Image (I) wherein R1 is hydrogen, straight-chain or branched C1-C12 alkyl, fluoro, chloro or phenyl, the phenyl radical being unsubstituted or substituted, if desired, with C1-C4 alkyl or C1-C2 alkoxy, and X, Y and Z are identical or different and are fluoro, chloro or bromo. Furthermore, a process for the preparation of the com- pounds of the formula I by reacting a compound of the formula (II) Image (II) in which R1 is as defined above with a compound of the formula III Image (III) in which X, Y and Z are as defined above and A is iodo, bromo or chloro, in the presence of a palladium catalyst, a base and, if desired, a solvent and/or stabilizing ligand and/or ammonium salts, at temperatures of 80-200°C.
Beller Matthias
Fischer Hartmut
Forstinger Klaus
Pfirmann Ralf
Strutz Heinz
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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