Dimethylformamide → 5-[(2,2,2-Trifluoroethoxy)methyl]pyridine-2-carbonitrile

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Reaction Steps

2-Chloro-5-[(2,2,2-trifluoroethoxy)methyl]pyridine (Intermediate 227, 0.537 g, 2.38 mmol) was dissolved in DMF (6 mL) and zinc cyanide (0.279 g, 2.38 mmol) was added. The mixture was degassed by stirring under a flow of nitrogen for 10 min. Tetrakis(triphenylphosphine)palladium(0) (0.275 g, 0.24 mmol) and further DMF (2 mL) were added and the mixture heated to 100 C in a sealed tube for 6 h. The mixture was partitioned between EtOAc (50 mL) and water (50 mL) and the organic layer washed with further water (2×50 mL). The organic layer was dried over sodium sulfate and concentrated to yield an orange oil. This was purified by FCC, eluting with a gradient of 0-30% EtOAc in heptane to afford the title compound as a colourless oil (0.255 g, 50%). 1H NMR (500 MHZ, CDCl3) δ ppm 8.62 (1H, d), 7.79 (1H, dd), 7.66 (1H, d), 4.72 (2H, s) and 3.89 (2H, q).

Provenance & Evidence