摘要:
New cephalosporin derivatives of the formula: ##STR1## in which R is an amino-protecting radical, R' is a protected carboxyl radical, Hal is a halogen atom, R.sub.a, R.sub.b and R.sub.c are hydrogen atoms, or R.sub.a is a protected carboxyl radical and R.sub.b and R.sub.c, which are identical or different, are hydrogen atoms, or C.sub.1 -C.sub.4 alkyl radicals, or together form a C.sub.2 -C.sub.5 alkylene radical, and n=0 or 1, their isomeric forms and mixtures thereof, are useful for the preparation of cephalosporins which have antibacterial properties.
摘要:
Cephalosporin derivatives of the formula: ##STR1## in which A is a single bond or a radical --CH.sub.2 --, --NH-- or --NHCO--, attached to the 3-position or 4-position of the pyridinio radical, R is a methyl, carboxymethyl, carbamoylmethyl, benzyl or allyl radical, R.sub.a, R.sub.b and R.sub.c are hydrogen atoms, or alternatively R.sub.a is carboxyl and R.sub.b and R.sub.c, which are identical or different, are hydrogen atoms or alkyl radicals, or together form an alkylene radical, and n equals 0 or 1, in their syn form, and also their addition salts with acids, metal salts and addition salts with nitrogen-containing bases are antibacterial agents having a broad spectrum of activity.
摘要:
The invention provides new cephalosporins of the general formula: ##STR1## in which n=0 or 1, R.sub.4 is an amine-protecting radical, R.sup.a.sub.5 and R.sup.b.sub.5, which are identical or different, are hydrogen atoms or alkyl radicals, or form an alkylene radical of 2 or 3 carbon atoms, R.sup.c.sub.5 is a hydrogen atom or an acid-protecting radical and R.sub.2 is an acid-protecting radical or a radical which can easily be removed by an enzymatic method. The compounds of formula (I) are in the form of a 3-oxoethyl-bicyclooct-2-ene or -bicyclooct-3-ene or a 3-oxoethylidenebicyclooctane if n=0, and in the form of a 3-oxoethylbicyclooct-2-ene or a 3-oxoethylidenebicyclooctane if n=1. They are useful as intermediates for the preparation of pharmaceutically active cephalosporins.
摘要:
New oxacephalosporins of the general formula (I), in which R is optionally N-oxidised pyridyl, pyrimidin-2-yl, substituted pyridazin-3-yl, 5,6-dioxo-1,4,5,6-tetrahydro-1,2,4-triazin-3-yl substituted in the 4-position, substituted 1-alkyl-1,3,4-triazol-5-yl or 1,2,4-triazol-5-yl, 5,6-dioxo-1,4,5,6-tetrahydro-1,2,4-triazin-3-yl substituted in the 1-position, 5,6-dioxo-1,4,5,6-tetrahydro-1,2,4-triazin-3-yl substituted in the 2-position, substituted or unsubstituted 2-alkyl-2,5-dihydro-5-oxo-1,2,4-triazin-3-yl, 1-amino-1,2-dihydro-2-oxo-pyrimidin-4-yl, substituted 1,3,4-thiadiazol-5-yl or tetrazol-5-yl substituted in the 1-position, R' is a substituted 2-(2-aminothiazol-4-yl)-acetyl radical or an .alpha.-carboxyarylacetyl radical and R" is a hydrogen atom or a methoxy radical in the 7.alpha.-position, and also their salts, their preparation and the medicaments in which they are present. ##STR1##
摘要:
New oxacephalosporins of the general formula ##STR1## in which R.sub.1 is a protective radical and (a) R.sub.4 is a substituted 2-(2-aminothiazol-4-yl)-acetyl radical of which the amine group is protected, or an .alpha.-carboxyarylacetyl radical, and R" is hydrogen or methoxy in the 7.alpha.-position, or alternatively(b) R.sub.4 is a protective radical and R" is hydrogen or methoxy in the 7.alpha.-position or hydrogen in the 7.beta.-position, in the form of a bicyclooct-2-ene or bicyclooct-3-ene or a 3-oxoethylidenebicyclooctane, are useful as intermediates for the preparation of pharmaceutically active oxacephalosporins.
摘要:
The present invention is related to a compound of formula (I) wherein R1, R2, R3, R4 and X are as defined herein, or an acid-addition salt thereof, its preparation and therapeutic use in the treatment or prevention of diseases involving the Nurr-1 nuclear receptors, also known as NR4A2, NOT, TINUR, RNR-1 and HZF3.
摘要:
New cephalosporin derivatives of the formula: ##STR1## in which R' represents a protected carboxyl radical, Hal represents a halogen atom, X.sub.1 represents a sulphur or oxygen atom or a sulphinyl radical and R represents an acyl radical or an amine-protecting radical, are useful as intermediates for the preparation of cephalosporins having antibacterial activity.
摘要:
New 3-vinylcephalosporin derivatives of the general formula: ##STR1## in the form of a bicyclooct-2-ene or bicyclooct-3-ene, in which formula R.sub.5.sup.a and R.sub.5.sup.b are hydrogen atoms or alkyl radicals, or together form an alkyl radical containing 2 or 3 carbon atoms, R.sub.5.sup.c is an acid-protecting radical, R.sub.1 is an amino-protecting radical, R.sub.2 is an acid-protecting radical or a radical which can be removed by an enzymatic method, and R.sub.3 and R.sub.4, which are identical or different, represent alkyl (optionally substituted by hydroxyl, alkoxy, amino, alkylamino or dialkylamino) or phenyl, or together form, with the nitrogen atom, a saturated heterocyclic ring of 5 or 6 members, optionally containing another hetero-atom, their E and Z forms, and their syn and anti forms, and mixtures thereof, and also their preparation. These new compounds are useful as intermediates for the preparation of biologically active cephalosporins.
摘要翻译:新的3-乙烯基头孢菌素衍生物,其通式为:双环-2-烯或双环-3-烯的形式,其中式R5a和R5b为氢原子或烷基,或 一起形成含有2或3个碳原子的烷基,R5c是酸保护基,R1是氨基保护基,R2是可以通过酶法除去的酸保护基或基团,R3和 R 4相同或不同,表示烷基(任选被羟基,烷氧基,氨基,烷基氨基或二烷基氨基)或苯基取代,或与氮原子一起形成5或6个成员的饱和杂环,任选地含有另外的杂原子 原子,它们的E和Z形式,以及它们的顺式和反型形式及其混合物,以及它们的制备方法。 这些新化合物可用作制备生物活性头孢菌素的中间体。
摘要:
New cephalosporins of the formula: ##STR1## in which n=0 or 1, R.sub.1 is a radical of the formula: ##STR2## [in which R.sub.4 is a protective radical and R.sub.5 is hydrogen, alkyl, vinyl, cyanomethyl or a protective radical], or R.sub.1 is a protective radical and R.sub.2 is a protective radical or an enzymatically removable radical, or R.sub.1 is an acyl radical which may be substituted in various ways and R.sub.2 is a protective radical, in the 3-oxoethyl-bicyclooct-2-ene or -bicyclooct-3-ene or 3-oxoethylidene-bicyclooctane form if n=0, and in the 3-oxoethyl-bicyclooct-2-ene or 3-oxoethylidene-bicyclooctane form if n=1, are useful as intermediates for the preparation of 3-thiovinyl-cephalosporins useful as antibacterial agents.
摘要:
Novel 3-vinyl-cephalosporin derivates of the general formula ##STR1## in the bicyclooct-2-ene or bicyclooct-3-ene form, in which R.sub.1 is a protective radical or is a radical of the general formula ##STR2## in which R.sub.5 is hydrogen, alkyl, vinyl or cyanomethyl, or a protective radical, and R.sub.6 is hydrogen or a protective radical, and R.sub.2 is a protective radical or an enzymatically removable radical, or R.sub.1 is an acyl radical, which may carry various substituents, and R.sub.2 represents a protective radical, and R.sub.3 and R.sub.4, which are identical or different, represent alkyl (optionally substituted by hydroxyl, alkoxy, amino, alkylamino or dialkylamino) or phenyl, or form, together with the nitrogen atom, a saturated 5-membered or 6-membered heterocyclic ring optionally containing another hetero-atom, their E- and Z-forms and their mixtures, are useful as intermediates for the preparation of 3-thiovinyl cephalosporins useful as antibacterial agents.