Phosphorus oxychloride → HCID 131712785, compound

Participants

Reaction Steps

2-(2-Formamidothiazol-4-yl)-2-(2-tert-butoxycarbonylaminoethoxyimino)acetic acid (syn isomer, 2 g.), N,N-dimethylformamide (0.45 g.), phosphoryl chloride (1.0 g.), 7-amino-3-[1-(2-hydroxyethyl)-1H-tetrazol-5-yl]thiomethyl-3-cephem-4-carboxylic acid (2 g.), trimethylsilylacetamide (5.9 g.) and ethyl acetate (50 ml.) were treated in a similar manner to that of Example 6-(1) to give 7-[2-(2-formamidothiazol-4-yl)-2-(2-tert-butoxycarbonylaminoethoxyimino)acetamido]-3-[1-(2-hydroxyethyl)-1H-tetrazol-5-yl]thiomethyl-3-cephem-4-carboxylic acid (syn isomer, 2.7 g.).

Provenance & Evidence