2-(Isocyanatomethyl)thiophene → HCID 44128465, compound

Participants

Reaction Steps

Thiophen-2-ylmethyl isocyanate (0.350 g, 2.5 mmol) was added drop wise to a suspension of 5-diazoimidazole-4-carboxamide (0.314 g, 2.3 mmol) in dry dimethylsulfoxide (2.5 mL) at room temperature under nitrogen. The resulting mixture was stirred at room temperature overnight. The reaction was quenched by the addition of ice and the solid product (off-white) was removed by filtration, washed with water and ethyl acetate and air dried to give the title compound. Yield: 0.405 g, 64%. IR vmax/cm−1 3094, 1732, 1690, 1607. 1H NMR δH (DMSO-d6) 5.68 (2H, s, CH2Ar), 7.03 (1H, dd, J=5.1, 3.5, ArH), 7.25 (1H, dd, J=3.5, 1.0, ArH), 7.55 (1H, dd, J=5.1, 1.0, ArH), 7.71 (1H, br s, NH), 7.83 (1H, br s, NH), 8.85 (1H, s, 6-H).

Provenance & Evidence