(2R,3S,5R,6R) 2-(N-Acetyl)carbamoyloxymethyl-6-[(R)-2-Amino-2-phenylacetamido]-2-methylpenam-3-carboxylic Acid p-Nitrobenzyl Ester → (2R,3S,5R,6R) 2-(N-Acetyl)carbamoyloxymethyl-6-[(R)-2-amino-2-phenylacetamido]-2-methylpenam-3-carboxylic Acid

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Reaction Steps

To a prehydrogenated suspension of 10% palladium on carbon (0.59 gm), water-washed ethyl acetate (6.0 ml) and water (3.0 ml) was added (2R,3S,5R,6R)2-(N-acetyl)carbamoyloxymethyl-6-[(R)-2-amino-2-phenylacetamido]-2-methylpenam-3-carboxylic acid p-nitrobenzyl ester (0.59 gm. 1.06 mmol). The mixture was shaken at 50 psi hydrogen pressure for 3 hours at 25° and then filtered through Dicalite-coated paper. The aqueous phase was separated, concentrated at reduced pressure to remove volatile solvent and gases, frozen and lyophilized. There was obtained 0.30 gm of the title compound as an amorphous solid. The purity was estimated from its nmr spectrum to be 60-70%.

Provenance & Evidence