反应详情

A −20° C. mixture of DIEA (552 mg, 4.27 mmol) and morpholine (242 mg, 2.78 mmol) in THF (5 mL) was treated drop-wise with a solution of 2-(bromomethyl)-1-fluoro-4-nitrobenzene (500 mg, 2.137 mmol) in THF (5 mL) and stirred overnight as the cooling bath expired. The mixture was treated with EtOAc, washed with water, then brine, dried over Na2SO4 and concentrated to dryness to afford 4-(2-fluoro-5-nitrobenzyl)morpholine (414 mg, 81% yield). 1H NMR (400 MHz, DMSO-d6): δ 8.30 (dd, J=6.2, 3.0 Hz, 1H), 8.21 (ddd, J=9.0, 4.4, 3.0 Hz, 1H), 7.48 (t, J=9.1 Hz, 1H), 3.61 (s, 2H), 3.56 (t, J=4.6 Hz, 4H), 2.40 (t, J=4.4 Hz, 4H); MS (ESI) m/z: 241.1 [M+H]+.

1. washwashed with water
2. dry with materialbrine, dried over Na2SO4
3. concentrationconcentrated to dryness