反应详情

To a solution of 2-(4-acetamidophenoxy)propionic acid (0.5 g, 2.2 mmol) in ethanol (10 mL) is added a drop of concentrated sulfuric acid and refluxed for 4 hours. The reaction is concentrated to dryness to give a residue. The residue is partitioned between water and ethyl acetate. The ethyl acetate layer is collected, dried (MgSO4), and concentrated to give ethyl 2-(4-acetamidophenoxy)propanoate (0.44 g) (yield 80%): 1H NMR (CDCl3) delta 1.27 (t, J=7.0 Hz, 3H), 1.60 (d, J=7.0 Hz, 3H), 4.25 (q, J=7.0 Hz, 2H), 4.76 (q, J=7.0 Hz, 1H), 6.84 and 7.46 (dd, J=9.0 Hz, 4H), and 8.02 (s, 1H).

1. temperaturerefluxed for 4 hours
2. concentrationThe reaction is concentrated to dryness
3. customto give a residue
4. customThe residue is partitioned between water and ethyl acetate
5. customThe ethyl acetate layer is collected
6. dry with materialdried (MgSO4)
7. concentrationconcentrated