Water → (3R,4R)-3-benzyloxycarbonylamino-4-(2-oxoethyl)azetidin-2-one

Participants

Reaction Conditions

Reaction Steps

To a solution of (3R,4R)-3-benzyloxycarbonylamino-4-(2,2-dimethoxyethyl)azetidin-2-one (2.15 g) in acetic acid (35.2 ml) were added dimethylsulfide (2 ml) and water (8.8 ml) at ambient temperature and the mixture was heated at 50° C. for 4.5 hours. The reaction mixture was evaporated in vacuo and the residue was dissolved in xylene (40 ml). The mixture was evaporated in vacuo and the residue was chromatographed on silica gel (10 g) eluting with a mixture of methylene chloride and acetone (5:1-2:1) to give a crystalline solid. This crude crystals were washed with ether and dried over phosphorous pentoxide to give (3R,4R)-3-benzyloxycarbonylamino-4-(2-oxoethyl)azetidin-2-one (863 mg).

Provenance & Evidence