Circular dichroic studies of 2-amino-2-deoxy-galactopyranosides - conformations of the 2-(N-acetyl-p-bromobenzamido) group
作者:Lee-Chiang Lo、Nina Berova、Koji Nakanishi、Ezequiel Q. Morales、Jesús T. Vázquez
DOI:10.1016/s0957-4166(00)86076-0
日期:1993.3
mono-N-acylates and their O-counterparts, and furthermore, the solvent- and temperature-dependent changes differ for the α- and β-anomers. These differences can be accounted for by the different conformations of the 2-NAcBz group.
2-氨基-2-脱氧-D-吡喃半乳糖苷甲基-N-酰化物(乙酰基或对-溴苯甲酰基)的CD谱类似于相应的O-酰化物的CD谱,可以通过加和法则来解释。然而,含有N-乙酰基-对-溴苯甲酰胺基酰亚胺基团(NAcBz)的吡喃糖苷的CD比单N-酰化物及其O-对应物的CD复杂得多,此外,取决于溶剂和温度的变化也不同对于α-和β-异头物。这些差异可以由2-NAcBz基团的不同构象解释。