tert-Butyl 2,6-dichloroisonicotinate

Synthesis

To a solution of 2,6-dichloroisonicotinic acid (2 g, 10.4 mmol) in toluene (50 mL) N, N- dimethylformamide di-fert-butil acetal (15 mL, 62.5 mmol) was added under nitrogen atmosphere and mixture heated at 80°C overnight. Ethyl acetate was added, and the organic layer was washed with water and brine, dried (MgS04), filtered and concentrated to yield tert-Butyl 2,6-dichloroisonicotinate (2.34 g, 87 per cent) as a solid.