摘要:
This invention concerns 2-amido-6-aminopenicillanic acids, 2amido-6-haloimidopenicillins, 2-amido-6-alkoxyimidopenicillins, 2-amido-7-aminocephalosporanic acids, 2-amido-7haloimidocephalosporins and 2-amido-7-alkoxyimidocephalosporins which are useful as intermediates in the preparation of synthetic penicillins and cephalosporins having potent antibiotic activity. Further, it relates to a process for the preparation of these intermediates from penicillins and cephalosporins. Still further, it concerns the preparation of 6-aminopenicillanic acid and 7aminocephalosporanic acid by the respective hydrolysis of 2amido-6-aminopenicillanic acids and 2-amido-7aminocephalosporanic acids.
摘要:
AND THE NON-TOXIC CATIONIC SALTS THEREOF WHEREIN R1 is hydrogen, lower alkyl, phenyl and substituted phenyl wherein the substituent is lower alkyl, lower alkoxy, chloro, bromo, fluoro and trifluoromethyl; R2 is hydrogen; R1 and R2 together with the carbon atom to which they are attached represent cycloalkyl of from three to seven carbon atoms; R3 is hydrogen and acyloxy lower alkyl wherein the acyloxy moiety is lower alkanoyloxy, benzoyloxy and substituted benzoyloxy wherein the substituent is chloro, bromo, fluoro, lower alkyl, lower alkoxy and trifluoromethyl; EACH OF R4 and R5 is hydrogen, lower alkyl, substituted lower alkyl wherein the substituent is lower alkoxy and fluoro; phenyl and substituted phenyl wherein the substituent is chloro, bromo, fluoro, lower alkyl, lower alkoxy and trifluoromethyl; R6 is hydrogen, hydroxy, acetoxy and tertiary amino; AND N IS 0 OR AN INTEGER FROM 1 TO 8, AND INTERMEDIATES THEREFOR.
Broad spectrum antibacterial agents; namely, Alpha (phosphonoalkyl)- and Alpha -( omega phosphonoalkyl)cycloalkylcephalosporins of the formula
摘要:
New 2-(thiocarbonylamino)acetamidocephalosporanic acid compounds of the following general formula, and their salts,
WHEREIN R is hydrogen, lower alkyl, aralkyl, a salt forming ion or the group
R1 is hydrogen, lower alkyl, lower alkenyl, cyclo-lower alkyl, unsaturated cyclo-lower alkyl, aryl, aralkyl or a heterocyclic group; R2 is lower alkyl, lower alkoxy-lower alkyl, lower alkylthio-lower alkyl, aryl, aralkyl or a heterocyclic group, R3 is lower alkyl, aryl or aralkyl and X is hydrogen, hydroxy, lower alkanoyloxy, aroyloxy, aralkanoyloxy, the radical of a nitrogen base, a quaternary ammonium radical or together X and R represent a bond linking carbon and oxygen in a lactone ring; are useful as antibacterial agents.
摘要:
Compounds containing a cephem nucleus are prepared by heating a 1-oxide of a Schiff base of 6-aminopenicillanic acid. These cephem compounds are useful as intermediates in the preparation of physiologically active cephalosporins.
摘要:
Cephalosporin compounds substituted at the 7-position with free or substituted Alpha -amino or hydroxy phenylacetamido and at the 3-position with a heterocyclic thiomethyl group are prepared by displacement of a 3-acetoxy-methyl compound with a mercaptoheterocycle or by 7-acylation. The products are antibacterial agents.
摘要:
N-(4-chlorobenzoyl)- and N-(2,4-dichlorobenzoyl)-cephalosporin C values are useful in processes for separating the cephalosporin C values for polysaccharide and proteinaceous impurities present in fermentation liquors. These new intermediates can be used as starting materials in cleavage processes for forming 7-aminocephalosporin values, and the 7-amino cephalosporin values can be used form cephalosporin antibiotics such as cephalothin, cephaloridine, and cephalexin.
摘要:
A new group of cephalosporin compounds characterized by possessing as 3-position substituent a phosphoranylidene ethyl group. The new compounds can be used as intermediates in the production of cephalosporin antibiotics characterized by possessing an ethyl or substituted ethyl group as 3-position substituent.