SYNTHESIS OF 2-(PARA-TRIFLUOROACETAMIDOPHENYL)ETHYL O-BETA-D-MANNOPYRANOSYL-(1-]2)-O-ALPHA-D-MANNOPYRANOSYL-(1-]2)-O-[ALPHA-D-GLUCOPYRANOSYL-(1-]3]-O-ALPHA-D-MANNOPYRANOSYL-(1-]2)-O-BETA-D-MANNOPYRANOSYL-(1-]3)-2-ACETAMIDO-2-DEOXY-BETA-D-GLUCOPYRANOSIDE, CORRESPONDING TO THE REPEATING UNIT OF THE SALMONELLA-THOMPSON, SEROGROUP-C1 O-ANTIGEN LIPOPOLYSACCHARIDE, AND OF A PENTASACCHARIDE FRAGMENT

2-(p-Trifluoroacetamidophenyl)ethyl O-beta-D-mannopyranosyl-(1 --> 2)-O-alpha-D-mannopyranosyl-(1 --> 2)-O-[alpha-D-glucopyranosyl-(1 --> 3)]-O-alpha-D-manno-pyranosyl-(1 --> 2)-O-beta-D-mannopyranosyl-(1 --> 3)-2-acetamido-2-deoxy-beta-D-glucopyranoside was synthesized. The main glycosylation method used was activation of thioglycosides with either dimethyl(methylthio)sulfonium triflate (DMTST), N-iodosuccinimide (NIS)/silver triflate or iodonium dicollidine perchlorate (IDCP).