反应详情

To a solution of tert-butyl 8-ethyl-9-phenyl-11-oxa-3,8-diazaspiro[5.5]undecane-3-carboxylate (295 mg, 0.82 mmol) in DCM (3 mL) was added hydrogen chloride (2 mL of 4 M dioxane, 8.18 mmol). The reaction mixture was stirred for 1 hour. The solvent was decanted and the residue was triturated with methanol and hexanes. The solvent was concentrated in vacuo to obtain 8-ethyl-9-phenyl-11-oxa-3,8-diazaspiro[5.5]undecane hydrochloride salt (230 mg, 95%) as a fluffy solid. ESI-MS m/z calc. 260.2. found 261.1 (M+1)+; Retention time: 0.2 minutes (3 min run).

1. customThe solvent was decanted
2. customthe residue was triturated with methanol and hexanes
3. concentrationThe solvent was concentrated in vacuo