Abstract: Method for purifying at least one lipoglycopeptide antibiotic comprising the steps of: i) dissolving said at least one lipoglycopeptide antibiotic in an aqueous solution to form a mixture, ii) loading said mixture into a chromatographic column comprising a stationary phase, wherein said stationary phase comprises silica functionalized with organic pendants, iii) eluting the mixture loaded in step ii) using an eluent composition comprising a water-soluble organic solvent obtaining eluate fractions, iv) selecting the eluate fractions containing the at least one purified lipoglycopeptide antibiotic.

Abstract: N-(2-hydroxyalkanoyl)-N,N?-dialkylureas of general formula (1) are described A-X-(A)m??(1) where A: m=0 or m=1; when m=0, X=R??, where R?? is an aliphatic, cycloaliphatic, arylaliphatic radical, C1-C18; when m=1, X=—(CH2)n—, where n is an integer from 1 and 20, preferably from 2 to 6; R is chosen among H, and alkyl radicals C1-C8, possibly substituted with halogen atoms; R? is an aliphatic, cycloaliphatic, arylaliphatic radical, C1-C18; R? is chosen among H, aliphatic, cycloaliphatic, arylaliphatic radical, C1-C18. The preparation of said compounds is described, as well as the preparation of corresponding polymers.

Abstract: N-(2-hydroxyalkanoyl)-N,N?-dialkylureas of general formula (1) are described A-X-(A)m??(1) where A: m=0 or m=1; when m=0, X=R??, where R?? is an aliphatic, cycloaliphatic, arylaliphatic radical, C1-C18; when m=1, X=—(CH2)n—, where n is an integer from 1 and 20, preferably from 2 to 6; R is chosen among H, and alkyl radicals C1-C8, possibly substituted with halogen atoms; R? is an aliphatic, cycloaliphatic, arylaliphatic radical, C1-C18; R? is chosen among H, aliphatic, cycloaliphatic, arylaliphatic radical, C1-C18. The preparation of said compounds is described, as well as the preparation of corresponding polymers.