Acetic Anhydride → 5-Acetylamino-2-amino-4-picoline

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Reaction Steps

To a solution of 2,5-diamino-4-picoline, prepared as shown in Example 30, (50 mg, 0.41 mmol) in methylene chloride (1.0 mL) were added triethylamine (70 uL, 0.49 mmol) and acetic anhydride (43 uL, 0.45 mmol). After stirring 0.5 h at room temperature, the reaction mixture 25 was evaporated to dryness and purified by silica gel chromatography using 40:10:1 chloroform-methanol-water as eluant to give the title compound.

Provenance & Evidence