反应详情

A mixture of methyl 2-[(4R)-4-allyl-3-chloro-2-oxoazetidin-1-yl]-3-methylbut-2-enoate (600 mg), tributyltinhydride (0.97 ml) and 2,2'-azobis-(2-methylpropionitrile) (40 mg) in benzene (6 ml) was refluxed for 1.5 hours. The reaction mixture was poured into a mixture of ethyl acetate (30 ml) and dilute aqueous sodium bicarbonate. The organic layer was separated, and washed with brine, dried over magnesium sulfate and evaporated in vacuo. The oily residue was chromatographed on silica gel (10 g) eluting with a mixture of hexane and ethyl acetate (10:1-10:3) to give methyl 2-[(4R)-4-allyl-2-oxoazetidin-1-yl]-3-methylbut-2-enoate (452 mg) as an oil.

1. temperaturewas refluxed for 1.5 hours
2. customThe organic layer was separated
3. washwashed with brine
4. dry with materialdried over magnesium sulfate
5. customevaporated in vacuo
6. customThe oily residue was chromatographed on silica gel (10 g)
7. washeluting with a mixture of hexane and ethyl acetate (10:1-10:3)