Hydrochloric Acid → 6-Fluoropyridine-2-carbohydrazide

Beteiligte Stoffe

Reaktionsschritte

1,1-Dimethylethyl 2-[(6-fluoro-2-pyridinyl)carbonyl]hydrazinecarboxylate (510 mg, 2 mmol) was dissolved in 1,4-dioxane (5 mL) and treated with 4M HCl in 1,4 dioxane (5.00 mL, 20.00 mmol) at 0° C. The mixture was stirred to room temperature over 24 hr and was concentrated in vacuo, azeotroping with diethyl ether (3×50 ml) to afford a white solid. The solid was dissolved in methanol and loaded on to an SCX cartridge (Varian, 10 g), washing with methanol, and then eluting the product in free base form using 2M ammonia/methanol. The ammoniacal fractions were concentrated in vacuo to afford the product, 6-fluoro-2-pyridinecarbohydrazide (251 mg, 1.618 mmol).

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