反应详情

To a mixture of benzhydryl 7-[2-(2-tritylaminothiazol-4-yl)-2-difluoromethoxyiminoacetamido]-3-chloromethyl-3-cephem-4-carboxylate (syn isomer) (1.5 g) and sodium iodide (769 mg) in N,N-dimethylformamide was added 3-mercapto-4-methyl-5-oxo-6-hydroxy-4,5-dihydro-1,2,4-triazine (816 mg). After being stirred for 45 minutes at room temperature, the reaction mixture was poured into water. The resulting precipitates were collected by filtration and dissolved in ethyl acetate. The solution was washed with water, an aqueous solution of sodium bicarbonate and a saturated aqueous solution of sodium chloride successively, dried and evaporated under reduced pressure. The residue was triturated in diisopropyl ether and collected by filtration to give benzhydryl 7-[2-(2-tritylaminothiazol-4-yl)-2-difluoromethoxyiminoacetamido]-3-(4-methyl-5-oxo-6-hydroxy-4,5-dihydro-1,2,4-triazin-3-yl)thiomethyl-3-cephem-4-carboxylate (syn isomer) (1.25 g).

1. customThe resulting precipitates
2. filtrationwere collected by filtration
3. dissolutiondissolved in ethyl acetate
4. washThe solution was washed with water
5. dry with materialan aqueous solution of sodium bicarbonate and a saturated aqueous solution of sodium chloride successively, dried
6. customevaporated under reduced pressure
7. customThe residue was triturated in diisopropyl ether
8. filtrationcollected by filtration