反应详情

A solution of methyl 3-hydroxy-5-[(3S)-tetrahydrofuran-3-yloxy]benzoate (2.5 g, 10.5 mmol), potassium carbonate (2.9 g, 21.0 mmol) and 5-(azetidin-1-ylcarbonyl)-2,3-dichloropyridine (2.9 g, 12.6 mmol) in DMA (25 mL) was heated at 120° C. for 5 hours. The solution was diluted with ethyl acetate (150 mL), washed with water (3×50 mL), brine (20 mL), dried (MgSO4), filtered and the solvent removed in vacuo. The residue was purified by chromatography on silica, eluting with 20-50% ethyl acetate in isohexane, to give the desired compound as a colourless oil (3.75 g). 1H NMR δ (CDCl3): 2.13-2.29 (m, 2H), 2.38 (quin, 2H), 3.85-4.04 (m, 4H), 3.90 (s, 3H), 4.19-4.37 (m, 4H), 4.96-5.00 (m, 1H), 6.91 (t, 1H), 7.42-7.45 (m, 2H), 8.14 (d, 1H), 8.25 (d, 1H); m/z 433 (M+H)+.

1. washwashed with water (3×50 mL), brine (20 mL)
2. dry with materialdried (MgSO4)
3. filtrationfiltered
4. customthe solvent removed in vacuo
5. customThe residue was purified by chromatography on silica
6. washeluting with 20-50% ethyl acetate in isohexane