反应详情

To a solution of p-nitrobenzyl α-[4-cyclopropylmethoxycarbonylthio-3-phenoxyacetamido-2-oxoazetidin-1-yl]-α-(1-methanesulfonyloxyethylidene)acetate (1.12 g) in benzene (11 ml) is added morpholine (0.26 ml) under ice cooling, and the mixture is kept at 10° C. overnight. The reaction mixture is washed with water, dried, and evaporated under reduced pressure. Purification of the obtained residue (1 g) by chromatography over silica gel (10 g) using a mixture of benzene and ethyl acetate (1:2) gives p-nitrobenzyl α-[4-cyclopropylmethoxycarbonylthio-3-phenoxyacetamido- 2-oxoazetidin-1-yl]-α-(1-morpholinoethylidene)acetate (602 mg). Foam.

1. washThe reaction mixture is washed with water
2. customdried
3. customevaporated under reduced pressure
4. customPurification of the obtained residue (1 g) by chromatography over silica gel (10 g)
5. additiona mixture of benzene and ethyl acetate (1:2)