Triethylamine → Ethyl 1-(aminomethyl)spiro[2.5]octane-1-carboxylate

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Reaction Steps

To a solution of 1-cyano-spiro[2.5]octane-1-carboxylic acid ethyl ester (7.1 g, 34.2 mmol) in 95 mL ethanol (EtOH) was added triethylamine (5.0 mL) and Raney nickel (4.0 g). The mixture was hydrogenated in a Parr shaker at 48 psi for 70 hours, filtered, and concentrated. Flash chromatography of the residue (5→10→15% MeOH/methylene chloride (CH2Cl2)) provided 5.0 g (69%) of 1-aminomethyl-spiro[2.5]octane-1-carboxylic acid ethyl ester as a colorless oil. 1H NMR δ 4.15 (q, J=7.1 Hz, 2H), 3.23 (d, J=13.9 Hz, 1H), 2.65 (d, J=13.9 Hz, 1H), 1.41–1.57 (m, 10H), 1.24 (m, 4H), 0.53 (d, J=4.9 Hz, 1H).

Provenance & Evidence