MODIFICATION OF GLYCOPEPTIDE ANTIBIOTIC EREMOMYCIN BY THE ACTION OF ALKYL HALIDES AND STUDY ON ANTIBACTERIAL ACTIVITY OF THE COMPOUNDS OBTAINED

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Alkylation of glycopeptide antibiotic eremomycin by the action of different alkyl halides leads, depending on the structure of alkyl halides used, to eremomycin derivatives of six types; alkylated at the N-terminus, quaternary compounds at the N-terminus, eremomycin esters, esters of eremocycin alkylated at the N-terminus, esters of eremomycin quaternised at the N-terminus, esters of eremomycin alkylated both at the N-terminus and at the aminogroup of disaccharide branch. Five compounds demonstrated high antibacterial activity in vitro, N-allyleremomycin and methyl ester of N, N-dimethyleremomycin being at least as good as the parent eremomycin.