摘要:
A 3-.beta.-(vic-dihydroxyphenylmethyleneamino-2-oxo-imidazolidine)- or 3-.beta.-(vic-dihydroxyphenyl-methyleneamino-2,3-dioxo-piperazine)-1-carbonylamino-acetamidoazetidin-2-one having an acidic grouping on .sub.1 N, e.g. of the formula ##STR1## The compounds are antibiotically active, especially against Pseudomonas bacteria and can be used in combating bacterial infection, as a preservative and as a growth promoting agent in animal feeds.
摘要:
Antibacterially active and animal feedstuff supplement .beta.-lactam antibiotics of the formula ##STR1## in which R is H or --UR',U is O or S,R' is optionally substituted alkyl, alkenyl, alkinyl, aralkyl, aryl or cycloalkyl, ##STR2## R.sup.1 and R.sup.2 individually are hydrogen or, individually or together with the carbon atom to which they are bonded, are any of various radicals,A is --CH.sub.2 --CH.sub.2 --, --CH.sub.2 --CH.sub.2 --CH.sub.2 -- or ##STR3## B is optionally substituted phenyl or is cyclohexenyl or cyclohexadienyl; X is S, O, SO, SO.sub.2 or --CH.sub.2 --; andY is a group of the formula ##STR4## T is hydrogen, alkyl-CO-O-, pyridinium, aminopyridinium, carbamoyloxy, azido, cyano, hydroxyl or optionally substituted -S-phenyl, or is -S-Het,in whichHet is an optionally substituted heterocyclic 5-membered or 6-membered ring;and whereinE is hydrogen, a radical forming, with the carboxyl group to which it is attached, a carboxy ester group, a cation of a salt, or a protective group,or a hydrate thereof. A process is also given for converting R directly from H to UR' employing a base, a halogenating agent and R'UH.
摘要:
Penicillins of the formula ##STR1## wherein X is O or S; Y is H or alkyl; Z is ##STR2## R.sub.1 is H or OH; and R.sub.2 and R.sub.3 each are H or wherein X is O or S; Y is H or alkyl; R.sub.2 and R.sub.3 each are H or taken together with the carbons to which they are attached form an aromatic six-membered carbocyclic or N-heterocyclic ring and alkyl, alkoxy, dialkylamino or halogen derivatives thereof are active against Gram-positive and Gram-negative bacteria.
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:
Penicillins of the formula: ##SPC1##And their pharmaceutically acceptable nontoxic salts whereinR.sub.1 is hydrogen, halogen, lower alkyl, hydroxy, nitro or A--NH;A is ##EQU1## wherein R.sub.3 is hydrogen; lower alkyl; halo-(lower alkyl); cycloalkyl of 3 to 11 carbon atoms, unsubstituted or substituted by hydroxy or alkyl of 1 or 2 carbon atoms; cycloalkenyl of 3 to 11 carbon atoms; bicycloalkyl of up to 8 carbon atoms; bicycloalkenyl of up to 8 carbon atoms; aryl of 6 to 10 carbon atoms, unsubstituted or substituted by 1 to 3 substituents selected from the group consisting of alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, halogen, trifluoromethyl, nitro, amino, alkylsulphonyl of 1 to 4 carbon atoms, and methylenedioxy; azidoaryl of 6 to 10 carbon atoms, azido-(lower alkyl); amino; or thienyl;R.sub.4 is lower alkylamino or arylamino of 6 to 10 carbon atoms;B is a direct bond; CH.sub.2 ; S--CH.sub.2 ; CH=CH; or CO--NH--CH.sub.2 ;E is phenyl or phenyl or thenyl, substituted by hydroxy, azido, lower alkyl, lower alkoxy, lower alkylthio or chlorine; andC* is an asymmetric carbon atom,Are useful for their antibacterial activity against both Gram-positive and Gram-negative bacteria.
摘要:
A PROCESS FOR PREPARING AMINOPENICILLINS IN HIGH YIELD WHEREIN 6-AMINOPENICILLANIC ACID IS SILYLATED WITH THE USE OF HEXAMETHYLDISILAZANE IN METHYLENE CHLORIDE AT REFLUX TEMPERATURE TO GIVE MONOSILYLATED 6-AMINOPENICILLANIC ACID. THE REACTION MIXTURE IS THEN TREATED WITH A WEAK AMINE FOLLOWED BY REACTION WITH A SUITABLE ORGANIC ACID HALIDE HYDROHALIDE. SOLVOLYSIS WITH WATER OR AN ALCOHOL IS THEN EMPLOYED TO REMOVE THE SILYL GROUP THEREBY TO AFFORD A SOLUTION OF THE AMINOPENICILLIN HYDROHALIDE, WHICH IS THEN ISOLATED AS THE AMINOPENICILLIN.
摘要:
Penicillins and cephalosporins of the formula ##STR1## wherein A is phenyl, 4-hydroxyphenyl, cyclohexyl, cyclohene-1-yl, cyclohexa-1,4-diene-1-yl, 2-thienyl, 3-thienyl, 2-furyl, 3-furyl or 3,4-disubstituted phenyl, where the substituents, which may be identical to or different from each other, are each chlorine, hydroxyl or methoxy;R.sub.1 is an unsubstituted or substituted 5- or 6-membered heterocycle comprising carbon atoms and 1 to 4, preferably 1 to 2, identical or different heteroatoms such as oxygen, sulfur or nitrogen;n is 0 or 1;X is ##STR2## D is hydrogen, hydroxyl, acetoxy, aminocarbonyloxy, pyridinium, aminocarbonyl-pyridinium or S-Het, where Het is 1-methyl-tetrazol-5-yl, tetrazol-5-yl, 3-methyl-1,2,4-thiadiazol-5-yl, 1,2,4-triadiazol-5-yl, 1,3,4-thiadiazol-5-yl, 2-methyl-1,3,4-thiadiazol-5-yl, 2-methylamino-1,3,4-thiadiazol-5-yl, 2-dimethylamino-1,3,4-thiadiazol-5-yl, 2-formylamino-1,2,4-thiadiazol-5-yl, 2-acetylamino-1,3,4-thiadiazol-5-yl, 2-methyl-1,3,4-oxadiazol-5-yl, 1,2,3-triazol-4-yl or 1,2,4-triazol-3-yl; andE is hydrogen or a protective group which is easily removable in nitro or in vivo, especially an ester-forming group which can be removed under mild conditions by hydrogenation or hydrolysis or other treatments, or an ester-forming group which can easily be split off in the living organism;and, when E is hydrogen, their non-toxic, pharmacologically acceptable salts thereof, such as their alkali metal or alkaline earth metal salts, especially the sodium, potassium, magnesium or calcium salts; their ammonium salts; or their organic amine salts, especially the triethylamine or dicyclohexylamine salts. The compounds are useful as antibiotics.
摘要:
Compounds of the formula ##STR1## wherein A is phenyl; 4-hydroxy-phenyl; 2- or 3-thienyl; cyclohexyl; cyclohexen-1-yl; cyclohexa-1, 4-dien-1-yl; or 3,4-disubstituted phenyl, where the substituents may be identical to or different from each other and are selected from the group consisting of chlorine, hydroxyl or methoxy; andR is an aliphatic, cycloaliphatic; aromatic or heterocyclic group of diverse types;and non-toxic, pharmacologically acceptable salts thereof formed with inorganic or organic bases. The compounds as well as their salts are useful as antibiotics.
摘要:
New .beta.-lactam antibiotics of the formula ##STR1## in which A is hydrogen or methoxy,B is phenyl optionally substituted by hydroxyl, halogen, methoxy, --CN and/or CH.sub.3 --SO.sub.2 --; thienyl; cyclohexenyl; 1,4-cyclohexadien-1-yl; or furyl,E is oxygen or sulphur,n is an integer having a value of 1 or 2,Y is a group of the formula ##STR2## T is hydrogen, alkyl--CO--O--, hydroxyl, pyridinium, aminopyridinium, carbamoyloxy, azido, cyano, optionally N-substituted thiocarbamoylthio, optionally substituted-S-phenyl, or a --S--Het group in which Het represents an optionally substituted heterocyclic 5-membered or 6-membered ring,U is oxygen, sulphur or --CH.sub.2 --,Z is a group of the formula ##STR3## R.sup.1, R.sup.2 and R.sup.3 each is hydrogen or various organic radicals, i.e. compounds wherein Z is an olefinic or hydrated olefinic radical directly connected to the ring nitrogen, or salts thereof, are antibacterially active and useful as antibiotics in pharmacy, as animal feed supplements for promoting growth, and as preservatives.