摘要:
Antibacterial compounds of the formula ##STR1## (where COB is carboxy or protected carboxy;Hal is halogen;R is amino or protected amino;R' is mercapto-protecting group; andX is nucleophilic group)Are prepared from penicillin 1-oxides having X on its 2-methyl group, and found to be used as starting materials for preparing cephalosporins.
摘要:
Novel penicillins of the formula ##STR1## wherein R is a branched chain alkyl group of from 3 to 14 carbon atoms, and their pharmaceutically acceptable salts, are easily absorbed in the blood and tissues through oral administration and show excellent antimicrobial activity against Gram-positive and Gram-negative bacteria, particularly against microorganisms of the genus Pseudomonas, such as Pseudomonas aeruginosa.
摘要:
Penicillin and cephalosporin derivatives characterized by the presence of a nitroalkyl, nitrocycloalkyl, nitrophenylalkyl or nitroanilinoalkyl group in the side chain are antibacterial agents. The compounds, of which 6-(2-nitro-3,3-dimethylbutyrylamido)-penicillanic acid, 7-nitroacetamido-3-methyl-ceph-3-em-4-carboxylic acid, and 6-[D-.alpha.-(2-nitro-2-methylpropionylamido)phenylacetamido] pencillanic acid are typical embodiments, are prepared by reacting 6-amino-penicillanic acid, 7-amino-cephalosporanic acid (or derivative thereof) or an .alpha.-substituted-.alpha.-amino-acetamido-penicillanic acid with an appropriate nitrated carboxylic acid or an equivalent nitrated acylating agent.
摘要:
Arylmethyl- and cyclohexenylmethyl- penicillins, substituted on the .alpha.-carbon atom of the side chain by a 2,3-disubstituted imidazolidinylcarbamide or a 2,3-disubstituted imidazolidinylthiocarbamido group, or by the corresponding 2,3-disubstituted 1,3-diazacyclohexylcarbamido or thiocarbamido groups are anti-bacterial agents.
摘要:
This invention relates to a novel class of esters of penicillins and cephalosporins which, upon oral administration are absorbed into the bloodstream where they are split by enzymic action to release the antibacterially active parent penicillin or cephalosporin.
摘要:
Novel [substituted(2,4-dioxo-1-pyrimidinyl)acetylamino]penicillin and cephalosporin derivatives are prepared which are useful antibacterial agents.
摘要:
The antibacterial agents of this invention present the following structural formula: ##SPC1##In whichA is a member selected from the group consisting of ##EQU1## M is a member selected from the group consisting of --H, an alkali metal and --NH.sub.4 ; andY is a member selected from the group consisting of ##EQU2## wherein R is --H, alkanoyloxy of 2 to 6 carbon atoms, ##SPC2##Or,When taken with the 3-carboxy group, ##SPC3##.
摘要:
The invention presents gram-positive and gram-negative antibacterial agents of the structural formula
IN WHICH R1 and R2 are independently -H or alkyl of 1 to 6 carbon atoms, and when taken together, R1 and R2 are trimethylene; R3 is -H, alkyl of 1 to 6 carbon atoms or methylthioethyl; N IS 0 OR 1, WITH THE PROVISO THAT WHEN N IS 1, R3 is -H; and A is a 7-amino-cephalosporin or 6-amino-penicillin moiety.
摘要:
Carbenicillin analogues, non-toxic salts and hydrolyzable monoand di-esters useful in treating infectious diseases caused by Gram-positive and Gram-negative bacteria. The terminal side chain group R is a fully saturated heterocyclic or cycloalkyl radical. The heterocyclic radical has 5, 6 or 7 ring atoms and one or more heteroatoms including oxygen, sulphur, >SO2 or >NR'' wherein R'' is hydrogen, lower alkyl, aryl, aralkyl or aryloxycarbonyl. Cycloalkyl is exemplified by cyclopropyl, cyclopentyl, cyclohexyl or cycloheptyl. Representative penicillins are Alpha carboxycyclopropyl methyl penicillin, Alpha -carboxycyclohexyl methyl penicillin, Alpha -carboxy-2-tetrahydropyranyl methyl penicillin and Alpha -carboxytetrahydrothiophen-1,1-dioxide-3-yl methyl penicillin.
摘要翻译:碳青霉素类似物,无毒盐和可水解的单酯和二酯可用于治疗由革兰氏阳性和革兰氏阴性菌引起的感染性疾病。 末端侧链基团R是完全饱和的杂环或环烷基。 杂环基具有5,6或7个环原子和一个或多个包括氧,硫,> SO 2或> NR'的杂原子,其中R'是氢,低级烷基,芳基,芳烷基或芳氧基羰基。 环烷基的实例是环丙基,环戊基,环己基或环庚基。 代表性的青霉素是α-羧基环丙基甲基青霉素,α-羧基环己基甲基青霉素,α-羧基-2-四氢吡喃基甲基青霉素和α-羧基四氢噻吩-1,1-二氧化物-3-基甲基青霉素。