Diisopropyl Ether → Benzhydryl 7-[2-(2-tritylaminothiazol-4-yl)-2-difluoromethoxyiminoacetamido]-3-(1-methyl-1-pyrrolidiniomethyl)-3-cephem-4-carboxylate-1-oxide iodide

Beteiligte Stoffe

Reaktionsschritte

A solution of benzhydryl 7-[2-(2-tritylaminothiazol-4-yl)-2-difluoromethoxyiminoacetamido]-3-iodomethyl-3-cephem-4-carboxylate-1-oxide (syn isomer) (1.97 g) and N-methylpyrrolidine (204 mg) in tetrahydrofuran (10 ml) was stirred for 40 minutes at 0°-5° C. and then diisopropyl ether was added thereto. The resultant precipitates were collected by filtration, washed with diisopropyl ether and air-dried to give benzhydryl 7-[2-(2-tritylaminothiazol-4-yl)-2-difluoromethoxyiminoacetamido]-3-(1-methyl-1-pyrrolidiniomethyl)-3-cephem-4-carboxylate-1-oxide iodide (syn isomer) (2.12 g).

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