Hydrochloric Acid → p-Nitrobenzyl 3-oxo-7-phenoxyacetamidocepham-4-carboxylate

Participants

Reaction Steps

A solution of p-nitrobenzyl α-[4-mercapto-3-phenoxyacetamido-2-oxoazetidin-1-yl]-α-(2-bromo-1-hydroxyethylidene)acetate prepared by the method of Example 4.--III(2) (70 mg) in a mixture of methylene chloride (2 ml), methanol (2ml), and 10% hydrochloric acid (0.3 ml) is stirred at room temperature for 2 hours. The reaction mixture is poured into ice water, and is extracted with methylene chloride. The extract solution is washed with water, dried over magnesium sulfate, and evaporated to give p-nitrobenzyl 3-oxo-7-phenoxyacetamidocepham- 4-carboxylate (44.5 mg), identical with the product of Example 4.--III(3). Yield: 74%.

Provenance & Evidence