Recyclable anomeric heavy-fluorous dendrimeric amide tags for reducing-to-non-reducing oligosaccharide synthesis.^40,41  Part A: Reagents and conditions (a) PrBOP, DMAP, DCM, rt, 20 h; (b) HF-Pyr, THF, rt, 20 h; (c) TMSOTf, MS 4 Å, Ether-EtOC₄F₉, 0 °C, 20 h; (d) HF-Pyr, THF, rt, 22 h; (e) TMSOTf, MS 4 Å, ether-EtOC₄F₉, 0 °C, 2 min; (f) NaOMe, MeOH-EtOC₄F₉, rt, 14 h; (g) H₂, Pd/C, AcOH, EtOH, rt, 21 h, quant. Part B: Reagents and conditions Mpt = P(S)Me₂ (a) 11, Fmoc-Gly-OH, DIC, DMAP, DCM,-EtOC₄F₉, rt, 2 h, FC72, 10% piperidine, DMF, rt, 30 min. (b) 12, DIEA, DCM, NMP, EtOC₄F₉, rt, 2 h, 82% (c) NIS, TfOH, MS 4 Å, DCM-EtOC₄F₉, 0 °C, 3 h (d) Piperidine, FC72-DMF, rt, 20 min (e) NIS, TfOH, MS 4 Å, DCM, EtOC₄F₉, 0 °C, 5 h (f) NaOMe, MeOH, EtOC₄F₉, rt, 2.5 h (g) Pd/C, H₂ gas, AcOH, EtOH, THF, rt, overnight, quant.