A new set of orthogonal-protecting groups for oligosaccharide synthesis on a polymeric support

The hydroxyl-protecting groups, levulinoyl (Lev) and 9-fluorenylmethoxycarbonyl (Fmoc), and the amino-protecting group 2,2,2-trichloroethoxycarbonyl (Troc), offer an ideal set of orthogonal-protecting groups which are compatible with oligosaccharide synthesis on a methylpolyethyleneglycol (MPEG) support using a p-alkyloxybenzyl-type linker. (C) 2000 Elsevier Science Ltd. All rights reserved.