P 1 -(11-phenoxyundecyl)- P 2 -(α-D-galactopyranosyl) diphosphate and P 1 -(11-phenoxyundecyl)- P 2 -(α-D-glucopyranosyl) diphosphate have been synthesized for the first time, and their ability to serve as a mannosyl residue substrate-acceptors in the enzymatic reaction, catalyzed by mannosyltransferase membrane preparation from Salmonella newport cells, was investigated. It was demonstrated that the derivative containing galactopyranose residue is able to accept the mannosyl residue from GDP-Man, while the derivative containing glucopyranose residue does not have such an ability.

A simple method of the synthesis of P 1 -(11-phenoxyundecyl)- P 2 -(2-acetamido-2-deoxy-α- D -galactopyranosyl) diphosphate, which is a synthetic lipid acceptor for glycosyl transferases participating in the biosynthesis of O-antigenic polysaccharides of Gram-negative bacteria, is suggested.