2, 3, 5-Tri-O-benzyl-D-arabinofuranosyl halides (chloride, bromide) were reacted with AllMgBr, MeMgBr, and VinMgBr to furnish anomeric mixtures of the C-glycosyl products. The factors that influenced the β/α ratio are discussed. The α, β-C-vinyl derivative was transformed into 1-deoxy-1-C-hydroxymethyl-β-and-α-D-arabinofuranoses (2, 5-anhydro-D- glucitol and-mannitol, respectively), separable after isopropylidenation step. 2, 5-Anhydro- ...