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The bromopyridine (110 g, 0.51 mol) and freshly prepared copper cyanide (50 g, 0.56 mol) were heated in DMF (1 L) at 100° C. for 13 hours. The reaction mixture was allowed to cool to room temperature and poured into a mixture EtOAc/H2O (1.5 L: 3 L). Obtained triphasic mixture was filtered from inorganic solid material. Organic phase was separated, washed with water and dried over sodium sulfate. The solvent was evaporated to provide the title compound (yield 63.7%).

1. customObtained triphasic mixture
2. filtrationwas filtered from inorganic solid material
3. customOrganic phase was separated
4. washwashed with water
5. dry with materialdried over sodium sulfate
6. customThe solvent was evaporated