1-Iodopropane → HCID 44549790、化合物
反応式
[Na].[CH3:2][C:3]1[NH:4][O:5][C:6](=[O:13])[C:7]=1[C:8]([O:10][CH2:11][CH3:12])=[O:9].I[CH2:15][CH2:16][CH3:17]>CN(C=O)C>[CH3:2][C:3]1[N:4]([CH2:15][CH2:16][CH3:17])[O:5][C:6](=[O:13])[C:7]=1[C:8]([O:10][CH2:11][CH3:12])=[O:9]参加物
4
反応条件
- 温度
- 120 °C
実験手順
To a stirred solution of ethyl 3-methyl-5-oxo-2,5-dihydroisoxazole-4-carboxylate sodium salt [prepared according G. Doleschall, Tetrahedron Lett. 1987, 28, 2993-2994] (3.5 g, 18.1 mmol) in DMF (20 mL) was added 1-iodopropane (1.70 g, 18.1 mmol). The resulting mixture was heated to 120° C. for 1 hr. When cooled down, it was poured into ice-water (30 mL), and extracted with dichloromethane (2×50 mL). The organic layer was washed with water (2×50 mL), dried over sodium sulfate, concentrated and purified by flash chromatography with ethyl acetate/hexanes (1/1) to provide a solid product (0.52 g, 13% yield). 1H NMR (CDCl3) δ ppm 4.33 (q, 2H, J=7.1 Hz), 3.86 (t, 2H, J=6.8 Hz), 2.57 (s, 3H), 1.81-1.88 (m, 2H), 1.37 (t, 3H, J=7.1 Hz), 0.98 (t, 3H, J=7.6 Hz). LCMS (APCI, M+H+): 214.1.