Hydrochloric Acid → 1-Cyclopropylpiperazine dihydrochloride

Participants

Reaction Steps

4.0M HCl in dioxane (42.7 mL, 170.78 mmol) was added to a stirred solution of tert-butyl 4-cyclopropylpiperazine-1-carboxylate (7.73 g, 34.16 mmol) in a mixture of methanol (50.0 mL) and ethyl acetate (200 mL). The resulting suspension was stirred at room temperature for 24 h under nitrogen. The white solid filtered off to give 1-cyclopropylpiperazine dihydrochloride (6.30 g, 93%).

Provenance & Evidence