1,4-Dioxane hydrochloride → HCID 86650024, compound

Participants

Reaction Steps

To a suspension of tert-butyl 2-[(4-{2-[2-(acetylamino)-1,3-thiazol-4-yl]ethyl}-2-fluorobenzyl)carbamoyl]hydrazinecarboxylate (141.6 mg, 0.314 mmol) in anhydrous dichloromethane (2 ml) was added 4M hydrogen chloride dioxane solution (2 ml). The mixture was stirred at room temperature for 2 hr, and concentrated under reduced pressure. Ethyl acetate (10 ml) was added to the residue, and the mixture was concentrated again under reduced pressure. This operation was repeated 3 times to remove hydrogen chloride gas azeotropically. The residue was suspended in a mixture of ethanol (2 ml) and ethyl acetate (4 ml), filtered, washed twice with ethyl acetate, and dried under reduced pressure to give N-(4-{2-[2-(acetylamino)-1,3-thiazol-4-yl]ethyl}-2-fluorobenzyl)hydrazinecarboxamide hydrochloride (123.6 mg, 0.319 mmol, quantitative) as a white solid.

Provenance & Evidence