摘要:
A novel cephalosporin derivative having at the 3-position of the cephem ring a heterocyclic thiomethyl group having a carboxy group or a sulfo group and at the 7-position of the cephem ring, an .alpha.-heterocyclic acylaminophenylacetamide group. The compounds of this invention have excellent antibacterial activity against Pseudomonas and Proteus strains of bacteria.
摘要:
Novel 7-(.alpha.-hydroxy-substituted pyridylcarboxamido-.alpha.-phenylacetamido)-3-substituted thiomethyl-.DELTA..sup.3 -cephem-4-carboxylic acid derivatives are disclosed. The compounds of this invention have high water solubility and show excellent antibacterial activities against various strains of Pseudomonas and Proteus.
摘要:
Substituted 1,3-dithietane-2-carboxylic acid derivatives useful as intermediates for the preparation of highly effective penicillin and cephalosporin derivatives and the preparation thereof.
摘要:
Substituted 1,3-dithietane-2-carboxylic acid derivatives useful as intermediates for the preparation of highly effective penicillin and cephalosporin derivatives and the preparation thereof.
摘要:
Substituted 1,3-dithietane-2-carboxylic acid derivatives useful as intermediates for the preparation of highly effective penicillin and cephalosporin derivatives and the preparation thereof.
摘要:
Novel 7.alpha.-methoxy-7.beta.-heterocyclic thioacetamido-3-heterocyclic thiomethyl-.DELTA..sup.3 -cephem-4-carboxylic acid derivatives and pharmaceutically acceptable salts thereof. These compounds show high antibiotic activities against various microorganisms including gram positive and negative bacteria.
摘要:
The invention relates to novel 7.alpha.-methoxycephalosporin derivatives having at the 7.beta.-position an amido group acylated by a 1,3-dithietane carboxylic acid residue and to 7.beta.-isothiazolylthioacetamido-7.alpha.-methoxycephalosporins having antibacterial activity by themselves and, as the case may be, capable of being converted into the aforesaid 7.alpha.-methoxycephalosporin derivatives. The compounds of this invention exhibit excellent antibacterial activity and are particularly effective against gram negative bacteria.
摘要:
The invention relates to novel 7.alpha.-methoxycephalosporin derivatives having at the 7.beta.-position an amido group acylated by a 1,3-dithietane carboxylic acid residue and to 7.beta.-isothiazolylthioacetamido-7.alpha.-methoxycephalosporins having antibacterial activity by themselves and, as the case may be, capable of being converted into the aforesaid 7.alpha.-methoxycephalosporin derivatives. The compounds of this invention exhibit excellent antibacterial activity and are particularly effective against gram negative bacteria.
摘要:
The invention relates to novel 7.alpha.-methoxycephalosporin derivatives having at the 7.beta.-position an amido group acylated by a 1,3-dithietane carboxylic acid residue and to 7.beta.-isothiazolylthioacetamido-7.alpha.-methoxycephalosporins having antibacterial activity by themselves and, as the case may be, capable of being converted into the aforesaid 7.alpha.-methoxycaphalosporin derivatives. The compounds of this invention exhibit excellent antibacterial activity and are particularly effective against gram negative bacteria.
摘要:
A 7-[2-(2-amino-4-thiazolyl)-2-(hydroxyimino)-acetamido]-3-(1,3-dithiolan-2-yl)-3-cephem-4-carboxylic acid derivative is provided which can be represented by the general formula: ##STR1## wherein A represents a hydrogen atom, a 1-acetoxyethyl group, a 1-cyclohexylacetoxyethyl group or a pivaloyloxy-methyl group.