α-Selective Organocatalytic Synthesis of 2-Deoxygalactosides
作者:Edward I. Balmond、Diane M. Coe、M. Carmen Galan、Eoghan M. McGarrigle
DOI:10.1002/anie.201204505
日期:2012.9.3
Alpha rules: A thiourea acts as an efficient organocatalyst for the glycosylation of protected galactals to form oligosaccharides containing a 2-deoxymonosaccharide moiety. The reaction is highly stereoselective for α-linkages and proceeds by way of a syn-addition mechanism.