反应详情

A procedure similar to step 3 of Example 1 was used. 1-(4-methoxy-phenyl)-hexan-1-one prepared in the step 2 and bromide were used as starting materials, and anhydrous AlCl3 was used as catalyst. The crude product obtained was distilled under a reduced pressure and purified by a silica gel column chromatography eluted with petroleum ether and ethyl acetate (20:1) to give a product as a white solid in a yield of 93.4%, mp: 54-55 └. 1H-NMR (CDCl3, 400 MHz) δ: 0.92 (3H, t, J=7.2 Hz, CH3), 1.30˜1.60 (4H, m, CH2CH2), 2.05˜2.25 (2H, m, CH2CHBr), 3.89 (3H, s, OCH3), 5.11 (1H, t, J=7.2 Hz, CHBr), 6.96 (2H, d, J=8.80 Hz, ArH), 8.01 (2H, d, J=8.80 Hz, ArH); ESI-MS m/e (%): 286.1 (M+2, 2), 284.1 (M, 2), 230.0 (3), 228.0 (3), 205.1 (5), 135.1 (100).

1. customThe crude product obtained
2. distillationwas distilled under a reduced pressure
3. custompurified by a silica gel column chromatography
4. washeluted with petroleum ether and ethyl acetate (20:1)