Phosphoric Acid → Sodium 3-phenylacetamido-2-oxoazetidine-1-sulfonate

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Reaction Steps

In 1 ml of water is dissolved 50 mg of the above 3-amino 2-oxoazetidine-1-sulfonic acid, followed by addition of a solution of 69 mg of phenylacetyl chloride in 1 ml tetrahydrofuran and 101 mg of sodium hydrogen carbonate in alternate portions with ice-cooling and stirring. After stirring at room temperature for 30 minutes, the mixture is adjusted to pH 5.8 with phosphoric acid. The tetrahydrofuran is then distilled off under reduced pressure. The water layer is washed with ethyl acetate and purified by XAD-II chromatography, whereby 42 mg of sodium 3-phenylactamido-2-oxoazetidine-1-sulfonate is obtained.

Provenance & Evidence