A
solution of 0.04 mol of the corresponding amine in 20 ml of anhydrous
methylene chloride was slowly added at 0-5??C to 0.02 mol of acryloyl
chloride in 20 ml of anhydrous methylene chloride. The mixture was
stirred for 3 h at room temperature in an inert atmosphere, and the
precipitate was filtered off and washed with methylene chloride (2 ?á 10
ml). The organic layer was washed in succession with 5 ml of water and 5
ml of a saturated solution of NaHCO3 and dried over Na2SO4, the solvent
was removed under reduced pressure, and the residue was purified by
column chromatography on silica gel using hexane-ethyl acetate (5 : 1 to
1 : 1) as eluent. 4-Acryloylmorpholine, Yield 1.78 g (63%).
IR spectrum, |í, cm-1: 2857, 1647, 1612, 1439, 1263, 1238, 1115, 1038,
953. 1H NMR spectrum, |?, ppm: 3.51-3.73 m (8H, NCH2CH2O),
5.72 d.d (1H, 3-Hcis, 3J = 10.6, 2J = 1.9 Hz), 6.29 d.d (1H, 3-Htrans,
3J = 16.7, 2J = 1.9 Hz), 6.57 d.d (1H, 2-H, J = 16.7, 10.6 Hz). 13C NMR
spectrum, |?C, ppm: 41.74 and 45.66 (CH2N), 66.22 (CH2O), 126.64 (C2),
127.69 (C3), 164.92 (C1). Mass spectrum, m/z (Irel, %): 141 (36) [M]+,
140 (12), 126 (58), 112 (22), 111 (15), 110 (15), 109 (12), 98 (10), 96
(26), 86 (72), 83 (13), 70 (14), 68 (14), 57 (17), 56 (86), 55 (100),
42 (23).
Fig. The synthetic method 2 of 4-Acryloylmorpholine
