Diisopropylethylamine → tert-Butyl 2-(5-oxo-2,5-dihydrofuran-3-yl)-2,9-diazaspiro[5.5]undecane-9-carboxylate

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Reaction Conditions

Reaction Steps

To commercially available 4-bromofuran-2(5H)-one (128 mg, 0.786 mmol) in THF (4 mL) was added Hunig's Base (275 μL, 1.57 mmol) and tert-butyl 3,8-diazaspiro[5,5]undecane-3-carboxylate (200 mg, 0.786 mmol). The reaction mixture was stirred at 76° C. overnight, concentrated and purified by column chromatography (0-10% MeOH in DCM) to afford the title compound. LCMS: [(M+1)]+=337

Provenance & Evidence