Pyridine → HCID 66817658, compound

Participants

Reaction Steps

Trifluoroacetic anhydride (0.287 ml, 2.07 mmol) was added to a solution of 2-(4-carbamoyl-phenyl)-4-oxo-1,3,8-triaza-spiro[4.5]dec-1-ene-8-carboxylic acid tert-butyl ester (350 mg, 0.94 mmol) and pyridine (0.303 ml) in dioxane (1.1 ml) at 0° C. The mixture was stirred for 30 minutes and then stirred at room temperature for one hour. An aqueous NaHCO3 solution was added to the reaction mixture, followed by extraction with dichloromethane. The organic layer was concentrated under reduced pressure, and the resulting residue was purified by silica gel column chromatography (dichloromethane-ethyl acetate) to give 2-(4-cyano-phenyl)-4-oxo-1,3,8-triaza-spiro[4.5]dec-1-ene-8-carboxylic acid tert-butyl ester as a white powder (235 mg, 71%).

Provenance & Evidence