Abstract
A catalytic glycosylation protocol was established using Tf2O or TfOH as catalyst and o-(p-methoxyphenylethynyl)benzyl (MPEB) glycosides as donors. The MPEB donors are stable and readily prepared from inexpensive starting material. The donors were activated by 10 mol% Tf2O or TfOH and coupled with various acceptors to provide desired glycosides in modest to good yield. This glycosylation protocol was further applied to the synthesis of linear hexamannose via ‘latent-active’ strategies.
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