Ethanol → tert-butyl 2,4-dioxo-1,3,7-triazaspiro[4.5]decane-7-carboxylate

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Reaction Conditions

Reaction Steps

A mixture of tert-butyl 3-oxopiperidine-1-carboxylate (0.20 g, 0.0010 mol), potassium cyanide (0.13 g, 0.0020 mol) and ammonium carbonate (0.77 g, 0.0080 mol) in ethanol (4.0 mL, 0.068 mol) and water (2.0 mL) was stirred at 70° C. for 4 h. The mixture was then diluted with ethyl acetate and washed with water, brine, dried and concentrated to give the desired product. LC-MS: 292.0 (M+Na)+.

Provenance & Evidence