Regioselective Reductive Opening of 4,6-O-Benzylidene Acetals of Glucose or Glucosamine Derivatives by BH3⋅Me2NH - BF3⋅OEt2 - Oikawa, Masato; Liu, Wen-Chi; Nakai, Yoshihiko; Koshida, Shuhei; Fukase, Koichi; Kusumoto, Shoichi (Synlett, 1996)