反应详情

A mixture of 2.7 g (5 mmoles) of 1-(1-n-butyloxycarbonyl-2-methylprop-2-enyl)-3-phenoxyacetamido-4-phthalimidothio-azetidin-2-one, 200 ml of 1,2-dichloroethane, 1,4 g (5 mmoles ) of 1,3-dibromo-5,5-dimethylhydantoin and 3 ml of propylene oxide was irradiated under nitrogen for 3 hours at 14° C with a Hanovia TQ 150 mercury high pressure lamp using a Pyrex filter. After concentrating the reaction mixture, the residue was chromatographed over silica gel [toluene -ethyl acetate 5:1 (v/v)] to obtain 300 mg (0.5 mmole) of 1-(1-n-butyloxycarbonyl-2-bromomethylprop-2-enyl)-3-phenoxyacetamido-4-phthalimidothio-azetidin-2-one.

1. filtrationfilter
2. concentrationAfter concentrating the reaction mixture
3. customthe residue was chromatographed over silica gel [toluene -ethyl acetate 5:1 (v/v)]