A series of novel 7-(D.alpha.-aminophenylacetamido)- and 7-(D-.alpha.-hydroxyphenylacetamido)- .DELTA..sup.3 -cephem derivatives have been prepared wherein a heterocyclic thiomethyl moiety is located at the 3-position of the molecule. These compounds are useful as antibacterial agents for the treatment of diseases caused by Gram-positive and Gram-negative bacteria. Preferred members include 7-(D-.alpha.-hydroxyphenylacetamido)-3-(3-carbamoyl-1,2,4-triazol-5-yl)thi omethylceph-3-em-4-carboxylic acid and 7-(D-.alpha.-hydroxyphenylacetamido)-3-(2-carboxymethoxy-methyl-1,3,4-thia diazol-5-yl)thiomethylceph-3-em-4-carboxylic acid. Alternative methods of preparation are provided for these compounds, including various synthetic routes leading to the required novel heterocyclic thiol intermediates.
Carbamoyl heterocyclicthio cephalosporins and pharmaceutical
申请人:Beecham Group Limited
公开号:US04198406A1
公开(公告)日:1980-04-15
Novel cephalosporin compounds, process of preparation thereof, intermediates useful in the preparation of the cephalosporins, pharmaceutical compositions formulated therefrom for administration and combinations of the cephalosporins in pharmaceutical composition form with clavulanic acid. The cephalosporin compounds are characterized by a 5-membered nitrogen-containing ring in the group in the 3-position of the sulphur-containing ring.