Novel Glycosidations of Glycals Using BCl3 or BBr3 as a Promoter for Catalytic and Stereoselective Syntheses of 2-Deoxy-α-glycosides - Toshima, Kazunobu; Nagai, Hideyuki; Ushiki, Yasunobu; Matsumura, Shuichi (Synlett, 1998)