Dimethylformamide → 4-Amino-2-[1-(ethoxy-4-methoxyphenyl)-3-hydroxybutyl]isoindoline-1,3-dione

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-amino-4-(3-ethoxy-4-methoxyphenyl)butan-2-ol hydrochloride (1.0 g, 3.63 mmol), 3-amino-N-ethoxycarbonylphthalimide (0.85 g, 3.63 mmol) and triethylamine (2.37 g, 3.63 mmol) in dimethylformamide (15 mL) was heated at 80-90° C. for 16 hours. The mixture was concentrated in vacuo and the residue was stirred with methylene chloride (10 mL). The mixture was filtered and the filtrate was concentrated and purified by chromatography (silica gel, methylene chloride:ethyl acetate 8:2) to give 4-amino-2-[1-(ethoxy-4-methoxyphenyl)-3-hydroxybutyl]isoindoline-1,3-dione as a white solid (0.72 g, 52%); 1H NMR (CDCl3) δ 7.41-7.35 (m, 1H), 7.11-7.05 (m, 3H), 6.83-6.80 (m, 2H), 5.54-5.48 (dd, J=4.1 and 11.8 Hz, 1H), 5.22 (s, 2H), 4.10 (q, 2H), 3.85 (s, 3H), 3.77 (m, 1H), 2.88-2.77 (m, 1H), 2.07-1.00 (m, 1H), 1.67 (s, 1H), 1.45 (t, 3H), 1.27 (d, 3H).

Provenance & Evidence