Sulfuric Acid → HCID 131717693, compound

Participants

Reaction Steps

To a suspension of 7β-(2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(1-carboxy-1-methylethoxyimino)acetamido]-3-(4,5,6,7-tetrahydro-1-pyrazolo[1,5-a]pyrimidinio)methyl-3-cephem-4-carboxylate (syn isomer)(0.5 g) in acetonitrile (1 ml) was added 2M sulfuric acid (0.5 ml) at ambient temperature. The mixture was stirred for 30 minutes. The resulting precipitate was collected by filtration to give 7β-[2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(1-carboxy-1-methylethoxyimino)acetamido]-3-(4,5,6,7-tetrahydro-1-pyrazolo[1,5-a]-pyrimidinio)methyl-3-cephem-4-carboxylate sulfate (syn isomer) as crystals (380 mg).

Provenance & Evidence