68327-11-7

672310-36-0

68327-11-7

To a 100 mL autoclave was added 15 g (70.7 mmol) of (R,R)-2-benzyloxycarbonylaminocyclopentanol and 0.3 g of 5% palladium-carbon catalyst, and 45 mL of degassed methanol under nitrogen protection. The reaction mixture was stirred under 2 MPa hydrogen pressure at 50 °C for 3 hours. Upon completion of the reaction, the palladium-carbon catalyst was removed by diatomaceous earth filtration. Concentrated hydrochloric acid was slowly added to the filtrate to adjust the pH to 3. Subsequently, the aqueous phase was concentrated to afford 7.9 g of trans-(-)-2-aminocyclopentanol hydrochloride in 79.2% yield.