反应详情

A mixture of (E)-ethyl 3-(4-fluoro-2-methylphenyl)acrylate (32.9 g, 0.16 mol) and platinum oxide hydrate (0.5 g, EM Scientific) in 95% ethanol (125 ml) was placed on a Parr apparatus. After the appropriate amount of hydrogen was taken up, the catalyst was filtered and the filtrate was concentrated in vacuo to give 33.7 g of ethyl 3-(4-fluoro-3-methylphenyl)propionate. A 1.0 g sample was purified by chromatography on silica gel with hexanes:dichloromethane as eluent to give 0.92 g of ethyl 3-(4-fluoro-3-methylphenyl) propionate as a colourless oil: NMR (CDCl3); δ6.78-7.26 (m, 3H, Ar), 4.13 (q, 2H, CH2), 2.90 (t, 2H, CH2), 2.54 (t, 2H, CH2), 2.31 (s, 3H, CH3), 1.24 (t, 3H CH3).

1. filtrationthe catalyst was filtered
2. concentrationthe filtrate was concentrated in vacuo