Abstract

AbstractAccessing large numbers of structurally diverse glycans and derivatives is essential to functional glycomics. We showed a general tolerance of galactosyltransferases toward uridine‐diphosphate‐galactosamine (UDP‐GalN), which is not a commonly used sugar nucleotide donor. The property was harnessed to develop a two‐step chemoenzymatic strategy for facile synthesis of novel and divergent N‐acetylgalactosamine (GalNAc)‐glycosides and derivatives in preparative scales. The discovery and the application of the new property of existing glycosyltransferases expand their catalytic capabilities in generating novel carbohydrate linkages, thus prompting the synthesis of diverse glycans and glycoconjugates for biological studies.

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