摘要:
New cephalosporins of the general formula: ##STR1## in which R is alkyl, L-2-amino-2-carboxyethyl, phenyl or various heterocyclic rings, R' is a hydrogen atom or a radical of the general formula: ##STR2## and R.degree. is hydrogen, alkyl, vinyl, cyanomethyl or a carboxyalkyl radical of the general formula: ##STR3## and also their salts, their preparation and the pharmaceutical compositions in which they are present.
摘要:
3-Vinylcephalosporin derivatives of the formula: ##STR1## in which the symbols R.sub.1 are phenyl radicals or radicals --OZ.sub.1 (it being possible for Z.sub.1 to be alkyl, 2,2,2-trichloroethyl or optionally substituted phenyl or benzyl, or for the radicals Z.sub.1 to form an alkylene radical), R.sub.2 is a radical which can be removed by an enzymatic method, or a protecting radical, and R.sub.3 and R.sub.4 are optionally substituted alkyl, or phenyl, or together form a saturated 5-membered or 6-membered heterocyclic ring optionally containing another hetero-atom, are new, crystallizable intermediates useful for the preparation of anti-bacterial cephalosporins.
摘要:
New oxacephalosporins of the general formula: ##STR1## in which either R.sub.1 is hydrogen or a protective radical, R.sub.4 is hydrogen or substituted 2-(2-aminothiazol-4-yl)-acetyl or .alpha.-carboxyarylacetyl, of which the amine and acid groups are free or protected, and R" is hydrogen or methoxy in the 7.alpha.-position, or R.sub.1 is a protective radical, R.sub.4 is a radical which can easily be removed and R" is hydrogen or methoxy in the 7.alpha.-position or hydrogen in the 7.beta.-position, and R.sub.2 is a radical --O SO.sub.2 --R.sub.3 or --O CO--R'.sub.3 (R.sub.3 and R'.sub.3 being substituted or unsubstituted alkyl radicals, or phenyl radicals) or a halogen atom, are useful as intermediates for the preparation of antimicrobial oxacephalosporins.
摘要:
New oxacephalosporin derivative of the general formula: ##STR1## in which R.sub.1 is a protective radical, R.sub.2 is either a radical of the general formula: ##STR2## [in which R.sub.5 is hydrogen, alkyl, vinyl, protected carboxyalkyl or a protective radical and R.sub.6 is a protective radical] or an .alpha.-carboxyarylacetyl radical and R" is hydrogen or methoxy in the 7.alpha.-position, or alternatively R.sub.2 is a protective radical and R" is either hydrogen or methoxy in the 7.alpha.-position or hydrogen in the 7.beta.-position, and R.sub.3 and R.sub.4 are optionally substituted alkyl, or phenyl, or form a heterocyclic ring with the nitrogen atom, their E and Z forms and mixtures thereof and also their preparation.These new products are useful as intermediates for the preparation of biologically active oxacephalosporins.
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 thioloesters of the formula: ##STR1## wherein R.degree. represents hydrogen, alkyl, vinyl, cyanomethyl or a protecting radical, R' represents hydrogen or a protecting radical, R represents alkyl, L-2-amino-2-carboxyethyl, phenyl or various heterocyclic radicals, and their syn and anti isomers and mixtures thereof, and metal salts thereof and addition salts thereof with tertiary nitrogen-containing bases, are intermediates useful in the preparation of cephalosporins having anti-bacterial properties.
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 oxathiino- and dithiino-aminoacetic acids of the formula: ##STR1## in which A represents oxygen or sulphur, together with their racemic forms, their optically active forms and mixtures thereof, their reactive derivatives and their acid addition salts, are valuable intermediates for the preparation of therapeutically active derivatives, in particular cephalosporin derivatives of the formula: ##STR2## where R is hydrogen or acetoxy.