Acetic Acid → 6-(2-Phenoxyacetamido)-2,2-dimethylpenam-3-carboxylic acid-1-oxide

関与物質

反応手順

Acetic acid (10 cc) was added to 6-(2-phenoxyacetamido)-2,2-dimethylpenam-3-carboxylic acid (1.75 g.), and sodium percarbonate (1.89 g.) was added thereto at 10° - 15° C. To the mixture were added water (2 cc) and sodium tungstate dihydrate (120 mg.), and the mixture was stirred for 2 hours. The mixture was acidified to a pH 3 with water (50 cc) and 10% hydrochloric acid. The precipitate was collected by filtration, washed with water and dried to yield crude crystals (1.31 g.) of 6-(2-phenoxyacetamido)-2,2-dimethylpenam-3-carboxylic acid-1-oxide, m.p. 160° - 161° C.

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