反应详情

温度

80 °C

To a solution of methyl 2-amino-3-(tetrahydro-2H-pyran-4-yloxy)benzoate (18 g, 0.071 mol) in AcOH (180 mL) was added a solution of KOCN (11.47 g, 142 mmol) in water (22 mL) at 60° C. Then the mixture was heated at 80° C. for 40 h. TLC (petroleum ether:ethyl acetate=1:1) showed the reaction was complete. Then the mixture was concentrated in vacuo. The residue was diluted with water (200 mL). The precipitate was filtered to give the title compound (9 g, 42%) as a white solid. 1H NMR (400 MHz, DMSO): δ 11.354 (s, 1H), 10.491 (s, 1H), 7.539 (d, 1H), 7.455 (d, 1H), 7.191 (t, 1H), 4.732 (m, 1H), 4.006 (m, 2H), 3.535 (m, 3H), 2.023 (m, 2H), 1.842 (m, 2H)

1. concentrationThen the mixture was concentrated in vacuo
2. additionThe residue was diluted with water (200 mL)
3. filtrationThe precipitate was filtered