Acetic Acid → 4-(3,4-Dimethoxyphenyl)-4-oxobutanoic acid

関与物質

反応手順

A stirred solution of 4-(3',4'-dimethoxyphenyl)-4-oxobutyronitrile (111) (2.26 g, 0.01 mol) in acetic acid (15 ml) and hydrochloric acid (12N, 40 ml) was heated at reflux for 1.5 hours and cooled to room temperature. The solvent was removed under reduced pressure to give a brown solid. Recrystallization from water gave 112 as light tan crystals (1.57 g, 66%). 1H NMR (CDCl3) 2.80 (t, J=7.5 Hz, 2H), 3.30 (t, J=7.5 Hz, 2H), 3.94 (s, 3H), 3.96 (s, 3H), 6.89 (d, 1H, J=9 Hz), 7.55 (d, 1H, J=1 Hz) and 7.64 (dd, 1H, 1 and 9 Hz).

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