Water → HCID 56636309, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 480 mg (1 mmole) of tertbutyl (1S,6R,7R)-3-bromomethyl-1-oxo-7-phenylacetamido-3-cephem-4-carboxylate in 12.5 ml of dimethylformamide was added 2.5 ml of water, 1 g of ammonium chloride and 500 mg of magnesium powder at 0° C. After stirring for 2 hours at 0° C. 100 ml of ethyl acetate was added. After filtration the diluted reaction mixture was subsequently washed with water, 1N hydrochloric acid, brine, and dried with magnesium sulfate. After treating the dried solution with diethylether and n-hexane the title product was filtered off, washed with n-hexane and dried, yielding 382 mg of tert-butyl (1S,4R,6R,7R)-3-methylene-1-oxo-7-phenylacetamido-cepham-4-carboxylate.

Provenance & Evidence