反应详情

To 1N hydrochloric acid was added 7β-[2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(1-carboxy-1-methylethoxyimino)acetamido]-3-[N,N-dimethyl-N-((5-hydroxy-4-oxo-1,4-dihydropyridin-2-yl)methyl}ammonio]methyl-3-cephem-4-carboxylate (syn isomer) (2.2 g). The mixture was stirred under ice-cooling for 3 hours. The resulting precipitate was collected by filtration, washed with a small amount of cold water and dried under reduced pressure to give 7β-[2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(1-carboxy-1-methylethoxyimino)acetamido]-3-{N,N-dimethyl-N-{(5-hydroxy-4-oxo-1,4-dihydropyridin-2-yl)methyl}ammonio]methyl-3-cephem-4-carboxylate hydrochloride (syn isomer) (1.1 g).

1. temperaturecooling for 3 hours
2. filtrationThe resulting precipitate was collected by filtration
3. washwashed with a small amount of cold water
4. customdried under reduced pressure