Potassium Carbonate → 2-(1,1-dimethylethyl)-1,5,6,7-tetrahydro-4H-benzimidazol-4-one

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 2-bromo-3-(methyloxy)-2-cyclohexen-1-one (0.957 g) in anhydrous N,N-dimethylformamide (20 mL) at ambient temperature was added solid tert-butylcarbamidine hydrochloride (0.638 g) and potassium carbonate (1.613 g, 11.67 mmol). The reaction was then heated to 100° C. under an atmosphere of nitrogen for 2.5 h. The reaction was diluted with dichloromethane (50 mL) the resultant solid was removed by filtration. The filtrate was concentrated in vacuo. The sample was loaded in dichloromethane and purified on silica using a 0-25% methanol-dichloromethane gradient. The appropriate fractions were combined and evaporated in vacuo to give the required product (330 mg).

Provenance & Evidence