Triethylamine → {4-[4-(Carbamoylmethylamino)phenyl]butyl}carbamic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

A mixture of [4-(4-aminophenyl)butyl]carbamic acid tert-butyl ester (0.8 g, 3.03 mmol), 2-bromoacetamide (0.46 g, 3.33 mmol), triethylamine (0.2 mL, 3.33 mmol), and DMF (30 mL) was stirred at 80° C. for 20 hours. TLC indicated that the reaction was not complete. Silver carbonate (0.92 g, 3.33 mmol) was thus added. The reaction was further stirred at 80° C. for 24 hours. The reaction mixture was passed through a silica plug. The solvent was evaporated in vacuo. The residue was purified by flash chromatography (silica gel, 3:1 ethyl acetate/dichloromethane, v/v) to provide 390 (0.20 g, 22%) as a white solid. 1H NMR (300 MHz, CD3OD) δ 1.42 (s, 9H), 1.55 (m, 4H), 2.50 (t, 2H), 3.03 (t, 2H), 3.70 (s, 2H), 6.52 (d, 211), 7.00 (d, 2H).

Provenance & Evidence