N-Benzyl-2-methylprop-2-en-1-amine → Tert-butyl 4-[[benzyl(2-methylallyl)amino]methyl]-4-hydroxy-piperidine-1-carboxylate

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A mixture of N-benzyl-2-methyl-prop-2-en-1-amine (0.57 g, 3.52 mmol) and tert-butyl 1-oxa-6-azaspiro[2.5]octane-6-carboxylate (0.75 g, 3.52 mmol) in ethanol (4 mL) was heated at 80° C. in a sealed vial for 16 hours. The reaction mixture was cooled and concentrated in vacuo to give tert-butyl 4-[[benzyl(2-methylallyl)amino]methyl]-4-hydroxy-piperidine-1-carboxylate (1.32 g, 100%) as a colorless oil. ESI-MS m/z calc. 374.5. found 375.7 (M+1)+; Retention time: 1.24 minutes (3 min run).

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