Fig. 3: The reaction scope of various glycosyl donors.

^aTemperature: 0 °C, 30 min then 60 °C, 2 h. ^bTemperature: 0 °C, 30 min, then 20 °C, 2 h. ^cTemperature: 0 °C, 30 min, then 100 °C, 2 h. ^dgalactosyl trichloroacetimidate was used as donor in the presence of TMSOTf (0.1 equiv.) at 0 °C in 30 min. ^eOn 1.2 g scale with 0.5 mol% Ph₃PAuNTf₂. ^f0.2 equiv. of i-Pr₂NEt was used as additive. ^gYields of α/β mixtures (α/β mixtures were not separable, except 3e and 3i), and ratios were determined by crude ³¹P NMR. Bn: benzyl. Bz: benzoyl. Ph: phenyl. Ac: acetyl. Tf: trifluoromethanesulfonyl. In red are the formed glycosidic bonds. In blue are the acceptors of phosphoric acids and the phosphate moieties in the products.