Benzylamine → 2-Benzoylaminothiazole-5-carboxylic Acid Benzylamide

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-benzoylaminothiazole-5-carboxylic acid methyl ester (0.40 g, 1.52 mmol), sodium cyanide (0.19 g, 3.79 mmol) and benzylamine (4 mL) was stirred at 80° C. for 70 h. The mixture was filtered, washed with ethyl ether, and the filtrate was concentrated in vacuo. The residue was dissolved in a mixture of methanol and tetrahydrofuran and aqueous lithium hydroxide solution (0.24 g in 6 mL water) was added. The mixture was stirred at 50° C. for 4 d. The organic solvents were removed in vacuo. The solid obtained was collected by filtration, washed with water, methanol and dried. The title compound was obtained as a white solid in 5% yield (0.005 g); 1H NMR (DMSO-d6, 300 MHz) δ 8.93 (s, 1H), 8.20-8.03 (m, 3H), 7.62-7.41 (m, 3H), 7.39-7.14 (m, 6H), 4.43 (d, J=3.9 Hz, 2H); MS (ES+) m/z 338.5 (M+1).

Provenance & Evidence