Abstract: Tetrapeptides of general formula (I) deriving from dalbaheptide antibiotics ##STR1## wherein: W and Z represent the relative portions of the aglycon of an antibiotic of the dalbaheptide group (aglucodalbaheptides);Y represents a carboxylic group or a functional derivative of said carboxylic group;R and R.sub.0 each independently represent amino or a protected amino group;R.sub.1 represents hydrogen or a protecting group of the carboxylic function;and its salts with acids and bases as well as its inner salts.A process for producing the tetrapeptides of formula (I) from the corresponding dalbaheptides and aglucodalbaheptides.

Abstract: Pentapeptide antibiotics of the formula ##STR1## wherein W, Z, X.sub.1, X.sub.2 and T represent the relative portions of an antibiotic of the dalbaheptide group (glycopeptide antibiotics), Y represents a carboxyacid group, a functional derivative of a carboxyacid group or a hydroxymethyl group. The invention includes the salts of the above represented pentapeptide antibiotics with acids or bases as well as their inner salts.

Abstract: The present invention is directed to an amide derivative of the glycopeptide, teicoplanin. This compound is an antibiotic that is active against gram positive bacteria. This compound is produced by subjecting teicoplanin to an amidation reaction.

Abstract: The present invention is directed to new C.sup.63 amide derivatives of teicoplanin wherein the amide moiety is derived from a di- or poly-alkylamine, and to a process for preparing them. The derivatives are prepared by reacting a teicoplanin-like product with an active ester forming reagent such as chloroacetonitrile and then contacting said active ester with the appropriate di- or poly-alkylamine. The amide derivatives of the invention are active against gram positive and gram negative bacteria.

Abstract: Hexapeptides of formula (I) deriving from aglucoteicoplanin and their salts with acids and bases as well as their inner salts wherein R is hydrogen or a protecting ##STR1## group of the amino function. The products of formula (I), wherein R is hydrogen, possess antimicrobial activity in particular against coagulase-negative strains and some S. aureus and S. epidermidis strains which have low sensitivity toward teicoplanin. The hexapeptides are produced by reductive cleavage of aglucoteicoplanin with alkali metal borohydrides in the presence of a hydroalcoholic mixture as solvent.

Abstract: The present invention is directed to teicoplanin derivatives in which position 63 of the glycopeptide core is substituted with a substituted alkylamide.

Abstract: C.sup.63 -Amide derivatives of 34-de(acetylglucosaminyl)-34-deoxy-teicoplanin wherein the amide moiety is derived from a di- or poly-amine. The derivatives are prepared by reacting 34-de(acetylglucosaminyl)- 34-deoxy-teicoplanins with an active esters forming reagent such as chloroacetonitrile and then contacting the resulting active esters with the appropriate di- or poly-amine. The amide derivatives which are active against Gram-positive microorganisms, in particular against Group A Streptococci were found to be active also against bacteria which are resistant to glycopeptide antibiotics.

Abstract: The present invention is directed to new de-(acetylglucosaminyl)-di(dehydro)deoxy teicoplanin derivatives which possess antibiotic activity mainly against gram positive bacteria.The new compounds are obtained by chemical modification of a teicoplanin antibiotic substance.

Abstract: The present invention is directed to the essentially pure preparation of an antibiotic substance arbitrarily designated antibiotic L 17054. This antibiotic substance is obtained from the known antibiotic substance named teicoplanin (formerly teichomycin) by chemical treatment. The new compound and the pharmaceutically acceptable salts possess antimicrobial activity.

Abstract: The present invention is directed to the essentially pure preparation of an antibiotic substance arbitrarily designated antibiotic L 17054. This antibiotic substance is obtained from the known antibiotic substance named teicoplanin (formerly teichomycin) by chemical treatment. The new compound and the pharmaceutically acceptable salts possess antimicrobial activity.

Abstract: The present invention is directed to carboxylic acid esters of deglucoteicoplanin, i.e. of the aglycon moiety of the antibiotic teicoplanin. The compounds of the invention are conveniently prepared either by deglucoteicoplanin or by any of the glycopeptides of the teicoplanin group, such as teicoplanin itself, one of its components, antibiotic L 17054 and antibiotic L 17046.

Abstract: The present invention is directed to ester derivatives at the carboxylic function of the glycopeptidic antibiotic substance called antibiotic L 17046 with antimicrobial activity mainly against gram-positive bacteria.

Abstract: Process for preparing antibiotic L, 17392 by catalytically hydrogenating a deglucoteicoplanin ester of formula ##STR1## wherein A, B and Z represent hydrogen atoms, R represents benzyl or substituted benzyl, wherein the phenyl group is substituted with at least a substituent selected from chloro, bromo, fluoro, nitro, (C.sub.1 -C.sub.3)alkyl, (C.sub.1 -C.sub.3)alkoxy and the like, with the exclusion of the tri-nitro phenyl group, or acid addition salts thereof, to catalytic hydrogenolysis in the presence of a poisoned hydrogenation catalyst at a temperature from 10.degree. C. to 40.degree. C. and a pressure between ambient pressure and 5 atm, in an inert organic solvent preferably in the presence of a mineral acid.

Abstract: The present invention is directed to new de-(acetylglucosaminyl-di(dehydro)deoxy teicoplanin derivatives which possess antibiotic activity mainly against gram positive bacteria.The new compounds are obtained by chemical modification of a teicoplanin antibiotic substance.

Abstract: The present invention is directed to a new antibiotic substance arbitrarily denominated antibiotic L 17046. This antibiotic substance is obtained from the known antibiotic substance called teicoplanin (formerly teichomycin) by chemical treatment. The new compound possesses antimicrobial activity expecially against gram-positive bacteria.

Abstract: This invention relates to a process for converting a teicoplanin-like compound into antibiotic L 17046 characterized in that a teicoplanin-like compound selected from teicoplanin complex, any further purified preparation thereof, teicoplanin factor A.sub.2, teicoplanin factor A.sub.3, each of the main components of teicoplanin factor A.sub.2, antibiotic L 17054 and a mixture of two or more of the above substances in any proportion is submitted to hydrolysis with a strong acid in the presence of a polar aprotic organic solvent selected from ethers, ketones and mixtures thereof that a room temperature are liquid.

Abstract: The present invention is directed to a class of basic monocarboxyamide derivatives of actagardine. Actagardine (INN) is an antibiotic substance produced by actinoplanes strains such as Actinoplanes Sp. ATCC 31048 and Actinoplanes Sp. ATCC 31049 which are described in U.S. Pat. No. 4,022,884. Actagardine shows antimicrobial in vitro and in vivo activity against gram-positive organisms. Its complete chemical structure is not yet known but there is only information on its chemical functions and main fragments. In particular, it has been found that actagardine has two carboxylic functions and a primary amino function and can therefore be represented as follows: ##STR1## The compounds of the invention are monoamide derivatives at one of the carboxy functions of actagardine.

Abstract: The present invention is directed to ester derivatives at the carboxylic function of the glycopeptidic antibiotic substance called antibiotic L 17046 with antimicrobial activity mainly against gram-positive bacteria.

Abstract: The present invention is directed to a new antibiotic substance arbitrarily denominated antibiotic L 17046. This antibiotic substance is obtained from the known antibiotic substance called teicoplanin (formerly teichomycin) by chemical treatment. The new compound possesses antimicrobial activity especially against gram-positive bacteria.

Abstract: The present invention is directed to the essentially pure preparation of an antibiotic substance arbitrarily designated antibiotic L 17054. This antibiotic substance is obtained from the known antibiotic substance named teicoplanin (formerly teichomycin) by chemical treatment. The new compound and the pharmaceutically acceptable salts possess antimicrobial activity.