Abstract:
Useful antibacterial agents in which a penicillin and/or a beta-lactamase inhibitor are linked via 1,1-alkanediol dicarboxylates are of the formula ##STR1## where A is the residue of certain dicarboxyic acids, R.sup.3 is H or (C.sub.1 -C.sub.3), n is zero or 1 such that when n is zero R is P or B and R.sup.1 is the residue of certain esters, H or a salt thereof; and when n is 1, one of R and R.sup.1 is P and the other is B, and P is ##STR2## where R.sup.2 is H or certain acyl groups, and B is the residue of a beta-lactamase inhibiting carboxylic acid; a method for their use, pharmaceutical compositions thereof and intermediates useful in their production.
Abstract:
6.beta.-Hydroxyalkylpenicillanic acids and derivatives thereof as useful enhancers of the effectiveness of several .beta.-lactam antibiotics against many .beta.-lactamase producing bacteria, and 6.beta.-substituted penicillanic acid benzyl ester derivatives as useful intermediates leading to said agents which enhance the effectiveness of .beta.-lactam antibiotics.
Abstract:
6-Acylamino-penam-3-carboxylic acids and 7-acylamino-3-cephem-4-carboxylic acids in which the acyl group has the formula ##STR1## in which R.sub.1 is hydrogen, R.sub.2 is optionally substituted phenyl, thienyl or furyl or R.sub.1 and R.sub.2 together are optionally substituted cycloalkyl, n and m independently of one another represent 0 or 1 and B represents an optionally substituted 2,6-dioxo- or 2,6-dithioxo-1,2,3,6-tetrahydro-pyrimidyl, 2-thioxo-6-oxo-1,2,3,6-tetrahydropyrimidyl, 2,6-dihydroxy- or 2,6-dimercapto-pyrimidyl, 2-mercapto-6-hydroxy-pyrimidyl, 2,6-diaminopyrimidyl, 2-amino-6-hydroxy-pyrimidyl or 2,6-dihalogenopyrimidyl radical, these radicals being bonded in the 4- or 5-position.
Abstract:
6-Alkoxylated-6-acylamidopenicillanic acids and 7-alkoxylated-7-acylamidocephalosporin acids and esters thereof, are provided by reacting a 6-acylamidopenicillanic acid ester or a 7-acylamidocephalosporin ester under anhydrous conditions at -90.degree. C. to -15.degree. C. with an alkali metal salt of a lower alkyl alcohol in the presence of an excess of the corresponding alcohol to produce, in situ, the anionic form of the antibiotic which on halogenation with a positive halogen compound, e.g. t-butyl hypochlorite, yields the compound of the invention. Compounds of the invention, e.g. 6-methoxy-6-phenoxyacetamidopenicillanic acid and 7-methoxy-7-[2-(2-thienyl)acetamido]cephalosporanic acid are useful antibiotics.
Abstract:
6-( Alpha -( omega GUANIDINOALKANOYLAMIDO)ACYLAMIDO)PENICILLANIC ACIDS, THE NONTOXIC SALTS AND ESTERS THEREOF ARE USEFUL AS ANTIBACTERIAL AGENTS, THERAPEUTIC AGENTS IN ANIMALS, INCLUDING MAN, OF PARTICULAR VALUE AGAINST GRAM-NEGATIVE BACTERIA, AND AS ANIMAL FEED NUTRITIONAL SUPPLEMENTS.