CARBAMATES AND UREAS OF N-(2-AMINOACYLAMIDO-2-DESOXY-HEXOSYL) AMIDE, METHOD FOR THEIR PREPARATION AND THEIR PHARMACEUTICAL USE

Compounds of the formula in which R1 denotes hydrogen or a saturated or singly or multiply unsaturated alkyl radical having up to 50 carbon atoms, X represents -CH2-, -O-or -NH-, R2 denotes hydrogen or a saturated or singly or multiply unsaturated alkyl radical having up to 50 carbon atoms, R3, R4 and R5, independently of one another, denotes hydrogen or acyl-CO-R6, R6 being an alkyl radical having up to 10 carbon atoms, R7 denotes hydrogen, C1-C7-alkyl-, hydroxymethyl, 1-hydroxyethyl, mercaptomethyl, 2-(methylthio)-ethyl, 3-aminopropyl, 3-ureidopropyl, 3-quanidyl-propyl, 4-aminobutyl, carboxymethyl, carbamylmethyl, 2-carboxyethyl, 2-carbamoylethyl, benzyl, 4-hydroxybenzyl, 3-indolylmethyl or 4-imidazolylmethyl, and R8 represents hydrogen or methyl, and R9 represents hydrogen, acetyl, benzoyl, trichloroacetyl, trifluoroacetyl, methoxycarbonyl, t-butyloxycarbonyl or benzyloxycarbonyl and R7 and R8 together can denote -CH2-CH2-CH2, and pharmaceutically acceptable salts thereof stimulate the immune system and can be used in conjuction with antibiotics and vaccines. New intermediates are also shown.