Efficient Methods for Glycosidations with Glycals - A Key Intermediate for the Synthesis of Mucin Core 1-Type<i>O</i>-Glycan
作者:R. R. Schmidt、Jürgen Geiger、Nadine Barroca
DOI:10.1055/s-2004-817790
日期:——
successful use of mild Lewis acid [Sn(OTf) 2 ] as catalyst for the glycosylation with O-glycosyl trichloroacetimidates and on the development of this method to construct a keyintermediate for the synthesis of mucin type O-glycans. To this end, chemoselective nitration of O-glycosylated glycals, stereoselective threonine addition, and reduction of the nitro group to the amino group by an efficient procedure