Synthetic Approach to exo-Glycals from 1-C-Vinyl-d-glycopyranose Derivatives via an SN1′-Substitution Mechanism - Yamanoi, Takashi; Nara, Yukari; Matsuda, Sho; Oda, Yoshiki; Yoshida, Akihiro; Katsuraya, Kaname; Watanabe, Mikio (Synlett, 2007)