Acetic Acid → HCID 69972127, compound

Participants

Reaction Steps

A solution of (3S)-4-benzyloxy-3-tert-butoxycarbonylamino-2-butanone (4.3 g) in dry MeOH (20 ml) was added to a solution of 2-aminoethanol (2.0 g) and AcOH (1.8 g) in dry MeOH (20 ml). NaBH3CN (1.4 g) was added and the mixture was stirred at ambient temperature overnight. The mixture was concentrated in vacuo and the residue was partitioned between AcOEt and aqueous NaHCO3 solution. The organic layer was washed with saturated aqueous NaHCO3 solution and saturated aqueous NaCl solution. The organic layer was mixed with 1N HCl (50 ml) and the mixture was stirred vigorously for 1 hour. The organic layer was separated, washed with saturated aqueous NaHCO3 solution and saturated aqueous NaCl solution, dried over MgSO4 and concentrated in vacuo to give 4.1 g of (2R, 3RS)-O-benzyl-2-tert-butoxycarbonylamino-3-(2-hydroxyethylamino)butanol as an oil.

Provenance & Evidence