bis(benzonitrile)palladium(II) dichloride; benzoyl chloride; 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene in 1,3,5-trimethyl-benzene T=140°C; 20 h; Inert atmosphere; regioselective reaction;

1: N,N-dimethyl acetamide With hydrogenchloride in benzene 2: 4-chlorobenzaldehyde in benzene T=190 - 200°C; 8 h;