Pyridine → HCID 3573095, compound

Participants

Reaction Conditions

Reaction Steps

To a flame dried flask equipped with stir bar was added methyl 3-aminothiophene-2-carboxylate (2.06 g, 13.1 mmol) and anhydrous methylene chloride (10.0 mL). The resulting solution was cooled to 0° C., and treated successively with pyridine (1.11 mL, 13.7 mmol) and butyryl chloride (1.44 mL, 13.7 mmol) while stirring under N2. The ice bath was removed, and the reaction warmed to 25° C. and stirred 3 h. The reaction was then poured into 1N HCl and extracted with methylene chloride. The combined organics were dried over magnesium sulfate, filtered and concentrated to provide methyl 3-(butyrylamino)thiophene-2-carboxylate (1-2). MS 228 found, 227.3 required.

Provenance & Evidence