Reactions of 2-Hydroxy-6,8-dioxabicyclo[3.2.1]oct-3-ene with Diethylaminosulfur Trifluoride and with Halogens. Facile Synthesis of 1,6-Anhydrohalohexopyranoses - Oberdorfer, Franz; Haeckel, Roland; Lauer, Gilbert (Synthesis, 1998)