反应详情

温度

15 °C

To a solution of 2.15 g (10.4 mmol) 3-cyclopentyloxy-4-methoxyaniline (J. Org. Chem. 2005,70, 1050) in 100 ml methanol were added 2.0 g (14.1 mmol) chloroacetaldehyde solution (55% in water), 3.9 g (62.6 mmol) NaBH3CN and 0.5 ml acetic acid. The reaction was stirred over night at 15° C. and the solvent was subsequently evaporated. The residue was taken up in 120 ml dichloromethane and the organic phase was washed with brine, dried over Na2SO4 and evaporated in vacuo. The crude product was purified by chromatography on silica gel (hexane:ethyl acetate 100:1 then 15:1) to give 1.78 g (63.5%) of the desired product as a yellow oil. 1H-NMR (DMSO): 6.70 (d, 1H), 6.28 (s, 1H), 6.06 (d, 1H), 5.43 (m, 1H), 4.69 (m, 1H), 3.68 (m, 2H), 3.60 (m, 3H), 3.32 (m, 2H), 1.83 (m, 2H), 1.69 (m, 4H), 1.55 (m, 2H).

1. customthe solvent was subsequently evaporated
2. washthe organic phase was washed with brine
3. dry with materialdried over Na2SO4
4. customevaporated in vacuo
5. customThe crude product was purified by chromatography on silica gel (hexane:ethyl acetate 100:1