Hydrochloric Acid → 4-(2,2-Difluoropropyl)-2-(methoxymethyl)-1-oxa-4,9-diazaspiro[5.5]undecane hydrochloride

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Reaction Steps

Tert-butyl 8-(2,2-difluoropropyl)-10-(methoxymethyl)-11-oxa-3,8-diazaspiro[5.5]undecane-3-carboxylate (77.0 mg, 0.204 mmol) was treated with HCl in dioxane (509 μL of 4 M, 2.04 mmol) and stirred for 2 h. The solvent was evaporated to provide 4-(2,2-difluoropropyl)-2-(methoxymethyl)-1-oxa-4,9-diazaspiro[5.5]undecane hydrochloride as yellow solid (64 mg, 0.20 mmol, 99%). ESI-MS m/z calc. 278.2. found 279.3 (M+1)+; Retention time: 0.79 minutes (3 min run).

Provenance & Evidence