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

Participants

Reaction Conditions

Reaction Steps

A solution of (6R,7R)-2,2-dimethyl-7-[1-methyl-1-(4-nitrobenzyloxycarbonyloxy)ethyl]-1-aza-3-oxabicyclo[4.2.0]octan-8-one (200 mg) in a mixture of acetic acid (3.2 ml) and water (0.8 ml) was heated at 65° C. for 1 hour. The mixture was cooled to room temperature and evaporated in vacuo. The crystalline residue was washed with ether to give (3R,4R)-4-(2-hydroxyethyl)-3-[1-methyl-1-(4-nitrobenzyloxycarbonyloxy)ethyl]azetidin-2-one (151 mg).

Provenance & Evidence