syntheses of 1-and ~-acetamido-2-deoxy-C-glucosides: M. Hoffmann. H. Kessler, Tetruhedron Lett. 1994, 35, 6067 -6070. 1101 A notable exception, which constitutes a precedent to this work. was recently provided by Sinay et al. who showed that reductive samariation of 2.3,4,6tetra-O-benzyl-8-D-glucopyranosyl phenyl sulfone by the Sm12-HMPA system in the presence of simple carbonyl compounds provided the corresponding p-C-glucosides in low yields (18-24%): P. de Pouilly, A. Chenede. J.-M. Mallet, P. Sinay. All a-C-mannosides 6 to 11 described in this study adopt a conformation close to that of ' S , , e.g., J,,,=7.4-7.8. J2,,=3.1-3.9, J,,,=5.3-5.7, and J4.5 = 3.2-4.1 Hz. That these products are indeed the a-anomers was confirmed by a nuclear Overhauser effect between the C-I and C-6 hydrogens in 6. The 2-deoxy-C-glycosides display the following coupling constants: banomers, J,,* = 9.6-12.0, J1,*. =2.1-2.2, J3,4 = 8.2-9.3 Hz; a-anomers.