(6R, 7R)-2,2-dimethyl-7-(1-methoxy-1-methylethyl)-1-aza-3-oxabicyclo[4.2.0]octan-8-one → (3R, 4R)-4-(2-hydroxyethyl)-3-(1-methoxy-1-methylethyl)azetidin-2-one

Participants

Reaction Conditions

Reaction Steps

A solution of (6R, 7R)-2,2-dimethyl-7-(1-methoxy-1-methylethyl)-1-aza-3-oxabicylco[4.2.0]octan-8-one (345 mg) in a mixture of acetic acid (5.52 ml) and water (1.38 ml) was heated at 65° C. for 30 minutes. The mixture was cooled to ambient temperature and evaporated in vacuo. Xylene was added to the residue and the resultant suspension was evaporated in vacuo. The crystalline residue was dissolved in a mixture of methanol and xylene and the resultant solution was evaporated in vacuo. This operation was repeated once, and the crystalline residue was washed with hexane to give (3R, 4R)-4-(2-hydroxyethyl)-3-(1-methoxy-1-methylethyl)azetidin-2-one (275 mg).

Provenance & Evidence