Hexaacetyl D-mannose hydrazine is one type of important intermediates in saccha- ride chemistry. In this paper, its single crystal was obtained and furthermore, X-ray diffraction and quantum chemistry calculation were performed. It belongs to orthorhombic system, space group P212121, with a = 16.267(3), b = 19.263(3), c = 7.1948(12) , Mr = 446.41, Dc = 1.315 g/cm3, V = 2254.5(6) 3 and Z = 4. Meanwhile, the experimental results also provide information for designing a kind of molecular switch based on the mannose nitrogenous derivatives.
CAO RuiLIU Xiao-HongCHENG Chang-MeiWANG Ru-JiZHAO Yu-FenWANG Lai-Xi
A highly efficient method to get 3-and 6-modified mannose/altrose derivatives for oligosaccharide synthesis is described. All the compounds were obtained exclusively with the combinations of 3-and/or 6-hydroxyl protection and/or activation(including the configuration conversion of 3-carbon atom).
LIU Xiao-hongXIE DangCHENG Chang-meiWANG Xia-yuGUO Xiao-qiangZHAO Yu-fen
