Lithium hydroxide, monohydrate → HCID 68311093, compound

Participants

Reaction Steps

Lithium hydroxide monohydrate (61 mg, 1.46 mmol, 2.0 eq) is added at room temperature to a stirred solution of (2S,5R)-(5-tert-butoxycarbonylamino-tetrahydro-pyran-2-yl)-acetic acid methyl ester (200 mg, 0.73 mmol, 1.0 eq) in methanol (10 mL) and water (5 mL) and the resulting mixture is stirred at room temperature for 2 hours. Then solvents are evaporated, the residue is acidified to pH 2 with 2.0 M hydrochloric acid aqueous solution and the resulting aqueous layer is extracted with ethyl acetate (3×20 mL). The combined organic layers are dried over sodium sulfate, filtered and concentrated to afford (2S,5R)-(5-tert-butoxycarbonylamino-tetrahydro-pyran-2-yl)-acetic acid as a colorless oil (150 mg, 79% yield).

Provenance & Evidence