1: (p-chlorophenyl)acetonitrile With Sodium hydride in N,N-dimethyl-formamide 0.25 h; NaH in DMF was mixed with DMF-soln. of CN-compd. within 20 minStirring; 2: 2,3-dichloro-5-(trifluoromethyl)-pyridine 0.333333 h; CF3-compd. was added dropwise within 20 min;