摘要:
The invention relates to novel cephem compounds, of antimicrobial activity, of the formula ##STR1## wherein R.sup.1 is amino or protected amino,R.sup.2 is carboxy(lower)alkyl or protected carboxy(lower)alkyl,R.sup.3 is lower alkoxy, andR.sup.4 is carboxy or protected carboxy,and a pharmaceutically acceptable salt thereof.
摘要:
There are disclosed compounds of the formula: ##STR1## in which R is lower alkoxycarbonyloxy(lower)alkyl or 1-propionyloxyethyl, or a salt thereof, pharmaceutical compositions containing the same and their use to treat infectious diseases.
摘要:
A cephalosporin derivative having an antibacterial activity similar to a cephalosporin antibiotic in living bodies without affecting the intestinal bacterial colonies, a method for preparing the derivative and a pharmaceutical composition in a dosage unit form containing the derivative as an active ingredient are disclosed.
摘要:
This invention relates to novel 7-acylamino-3-vinylcephalosporanic acid derivatives of high antimicrobial activity, to processes for preparation thereof from novel intermediates, and to said intermediates of the formula: ##STR1## in which R.sub.A is a group of the formula: ##STR2## wherein R.sup.1 is amino-substituted-heterocyclic group which may have halogen, protected amino-substituted-heterocyclic group which may have halogen, or a group of the formula: ##STR3## wherein R.sup.3 is lower alkyl,R.sup.8 is aryl,A is lower alkylene which may have a substituent selected from the group consisting of amino, a protected amino group, hydroxy, oxo and a group of the formula:.dbd.N.about.OR.sup.4,whereinR.sup.4 is hydrogen, cyclo(lower)alkenyl, lower alkynyl, lower alkenyl, lower alkenyl substituted by carboxy or a protected carboxy group, lower alkyl, or lower alkyl substituted by one or more substituent(s) selected from carboxy, a protected carboxy group, amino, a protected amino group, cyano, phosphono, a protected phosphono group and a heterocyclic group which may have suitable substituent(s),R.sup.a is a protected amino group,R.sup.b is a protected carboxy group,R.sub.B is a group of the formula:--CH.sub.2 --X.sup.2, --CH.sub.2 P.sup..sym. (R.sup.7).sub.3 .multidot.X.sup.3.crclbar. or --CH.dbd.P(R.sup.7).sub.3whereinR.sup.7 is aryl, and X.sup.2 and X.sup.3 are each halogen, andR.sup.2 is carboxy or a protected carboxy group, provided that, when R.sub.A is a group of the formula:R.sup.8 --CH.dbd.N--, wherein R.sup.8 is as defined above, then R.sub.B is a group of the formula:--CH.sub.2 P.sup..sym. (R.sup.7).sub.3 .multidot.X.sup.3.crclbar. or --CH.dbd.P(R.sup.7).sub.3,whereinR.sup.7 and X.sup.3 are each as defined above, or a salt thereof.
摘要:
Novel compounds of formula I, ##STR1## in which R.sub.1 is hydrogen, alkyl, phenylalkyl, carbalkoxyalkyl, acyl, carboxyalkyl, alkoxyalkyl, hydroxyalkyl, cyanoalkyl, or carbamoylalkyl,R.sub.2 is hydrogen, pivaloyloxymethyl or the residue of an easily splittable ester grouping,R.sub.3 is a pyrazolyl radical, unsubstituted or mono- or di-substituted by alkyl, phenyl, alkoxy, alkylthio, carboxy, carboxyalkyl, carbamoyl, carbamoylalkyl, alkylsulphonyl, azido, acylamino, hydrazino, acylhydrazino alkylidenehydrazino, phenylidenehydrazino, in which the phenyl nucleus is unsubstituted or substituted by NH.sub.2, lower alkoxy or lower alkyl, furylidenehydrazino, carbalkoxy or a group R.sub.5 R.sub.6 N--, in which R.sub.5 and R.sub.6 are the same or different and are hydrogen or alkyl, provided that the nitrogen atoms and the 4-position of the pyrazole nucleus are either unsubstituted or substituted by alkyl, phenyl, or carbalkoxy, andR.sub.4 is hydrogen, acetoxy, carbamoyloxy or --S--Rh, in which Rh is a heterocyclic radical.
摘要:
This invention relates to novel 7-acylaminocephalosporanic acid derivatives of high antimicrobial activity, to processes for their preparation, and to pharmaceutical compositions comprising said derivatives, said derivatives being of the formula: ##STR1## wherein R.sup.1 is amino or protected amino,R.sup.2 is dialkanoyloxy(lower)alkyl; alkyl having one or more substituents selected from the group consisting of hydroxy, protected hydroxy, alkoxy, carboxy, protected carboxy, cycloalkylcarbonyloxy and heterocyclic group; lower alkoxycarbonyloxy(lower)alkyl; azido(lower)alkoxycarbonyloxy(lower)alkyl; aroyloxy(lower)alkyl; higher alkanoyloxy(lower)alkyl; phthalidyl; or phthalidylidene(lower)alkyl,R.sup.3 is lower alkyl,Y is thio (--S--) or sulfinyl (--S--), and the dotted line represents 2- or 3-cephem nuclei.
摘要:
The present invention relates to derivatives of the family of cephalosporins, of formula: ##STR1## in which ##STR2## is an acid, a salt or an ester of this acid, R.sub.1 is a group of form ##STR3## in which R.sub.A and R.sub.B are H or alkyl or form a saturated cyclobutyl or cyclopentyl ring and R.sub.C is H or COOH, R.sub.2 is a thiazolium salt or a OCOCH.sub.2 R.sub.D group in which R.sub.D is a 1,3-thiazol-4-yl group.The invention also relates to a process for preparing the products of formula (I) and to drugs containing said products.
摘要:
Novel alkyloximes of 7-amino-thiazolyl-acetamido-cephalosporanic acids of the formula ##STR1## wherein R is selected from the group consisting of alkyl of 1 to 5 carbon atoms, cycloalkyl of 3 to 5 carbon atoms and --CH.sub.2 --SR', R' is selected from the group consisting of acyl of an alkanoic acid of 2 to 4 carbon atoms, 1-methyl-tetrazolyl and 2-methyl-1,3,4-thiadiazolyl, R.sub.1 is selected from the group consisting of hydrogen and a group easily removeable by acid hydrolysis or hydrogenolysis, R.sub.2 is selected from the group consisting of alkyl of 1 to 4 carbon atoms and alkenyl and alkynyl of 2 to 4 carbon atoms, A is selected from the group consisting of hydrogen, an alkali metal cation, an equivalent of an alkaline earth metal or magnesium, or organic amine base cation and an ester group easily removeable by acid hydrolysis or hydrogenolysis with the proviso that when R.sub.1 is hydrogen, A is not an ester group easily removeable by hydrogenolysis or acid hydrolysis and the wavy line means that OR.sub.2 is in one or the other of the two possible syn or anti isomeric positions having a very good antibiotic activity and novel processes and intermediates for their preparation.
摘要:
Cephalosporin compounds represented by the general formula ##STR1## wherein R represents a group shown by formula ##STR2## wherein R.sup.1 represents a hydrogen atom or a lower alkyl group of 1-3 carbon atoms and R.sup.2 represents a hydrogen atom, a lower alkyl group of 1-3 carbon atoms, a phenyl group which may be substituted by an amino or hydroxy group, a cyano group, a carboxy group, or a carboxymethyl group; said R.sup.1 and R.sup.2 may form a cycloalkylidene group of 4-6 carbon atoms together with the carbon atom to which they are bonded) or a group shown by formula --CH.sub.2 --R.sup.3 (wherein R.sup.3 represents a hydrogen atom, a halogenomethyl group, a carbamoyl group, a carboxymethyl group, .alpha.4-carboxy-3-hydroxyisothiazol-5-yl-thiomethyl group, or .alpha.2-carboxyphenylthiomethyl group); R' represents a group shown by formula ##STR3## (wherein R.sub.a represents a carboxy group, a cyano group, or a carbamoyl group which may be substituted by a lower alkyl group of 1-3 carbon atoms and R.sub.b represents a hydrogen atom or an amino group) or a group shown by formula ##STR4## (wherein R.sub.a and R.sub.b have the same significance as above); and the waveline .about. shows an anti-form or syn-form bond and the salts thereof. They possess excellent antibacterial activities against gram positive bacteria and gram negative bacteria, in particular, pseudomonas aeruginosa and are useful as anti-bacterial agents.
摘要:
The invention relates particularly to syn compounds of the formula: ##STR1## wherein R.sup.2 is hydrogen or an aliphatic hydrocarbon residue which may be substituted with halogen, carboxy or esterified carboxy,R.sup.5 is carboxy or functionally modified carboxy and R.sup.6 is amino or protected amino, and pharmaceutically acceptable salt thereof, their preparation and their pharmaceutical uses.