New,Unexpected Pyranose-Furanose Rearrangement Towards the Synthetic Studies on Rare Sugars and Nucl

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1 Introduction Preparation of rare aminosugars such as N-acetylgalactosamine (GalNAc) in large quantities is of importance for the chemo-enzymatic synthesis of oligosaccharides.Starting from naturally abundant N-acetylglucosamine (GlcNAc), the regio- and 1 Introduction Preparation of rare aminosugars such as N-acetylgalactosamine (GalNAc) in large quantities is of importance for the chemo-enzymatic synthesis of oligosaccharides. Starting from naturally abundant N- acetylglucosamine (GlcNAc), the regio- and
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