S - o -( p -Methoxyphenylethynyl)benzyl (SMPEB) Glycosides for Catalytic Glycosylation and Their Application in the Synthesis of Polyporus Umbellatus Polysaccharides.

We herein reported a new type of --(-methoxyphenylethynyl)benzyl donor for a highly efficient glycosylation method. The donor was activated by 10% TfO and underwent glycosylation with various acceptors to provide the corresponding glycosides in excellent yield. Furthermore, two repetitive fragments of polysaccharides (PUPs), isolated from traditional Chinese medicine "", were prepared by combining the "single-catalyst one-pot" and "latent-active" strategies for the first time for future clear studies on the structure-activity relationship of PUPs.