obtained in 11 steps and 4.8 % overall yield with recovery of the chiral auxiliary ((1S)-camphanic acid) at an early stage of the synthesis. The method implies bromination of(-)-2-(tert-butyl) dimethylsilyl]oxy-5-exo6-exo-(isopropylidenedioxy)-7-oxabicyclo[2.2.1]hept-2-ene(-)-12) and its highly stereoselective transformation into (-)-benzyl (l23-O-triacetyl-5-azido-5-deoxy-ga- and β-D-allofuranosid)-uronate