1: methyl 4-O-benzoyl-2,3,6-trideoxy-α,β-L-threo-hex-2-enopyranoside With lithium aluminium tetrahydride in 1,4-dioxane 120 h; Inert atmosphereReflux; 2: tert-butyldimethylsilyl chloride With 1H-imidazole in N,N-dimethyl-formamide; toluene Inert atmosphere; Overall yield = 91 percent; Overall yield = 29.51 g;

lithium aluminium tetrahydride in 1,4-dioxane 120 h; Inert atmosphereReflux;