Benzyl Alcohol → Benzyl 6-oxopyran-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

A solution of coumalic acid (1.2 g, 8.57 mmol) in DCM (20 mL) and THF (20 mL) was treated with 4-dimethylaminopyridine (0.105 g, 0.857 mmol). The reaction was stirred under nitrogen at 23° C. After 15 min, benzyl alcohol (0.886 mL, 8.57 mmol) and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (1.642 g, 8.57 mmol) were added, and the stirring was continued. After 5 h, the solution was diluted with DCM (200 mL) and the mixture was washed with water (150 mL), dried over MgSO4, concentrated in vacuo and purified by silica gel chromatography (eluent: 5-25% EtOAc/hexane), affording the title compound as a white solid. 1H NMR (400 MHz, CDCl3) δ ppm 8.32 (s, 1H), 7.80 (dd, J=9.78, 2.15 Hz, 1H), 7.33-7.48 (m, 5H), 6.33 (d, J=9.78 Hz, 1H), 5.31 (s, 2H). MS (ESI, positive ion) m/z: 231.1 (M+H).

Provenance & Evidence