81928-98-5Relevant articles and documents
Study of the stereoselectivity of 2-azido-2-deoxygalactosyl donors: Remote protecting group effects and temperature dependency
Kalikanda, Jane,Li, Zhitao
experimental part, p. 5207 - 5218 (2011/08/09)
The stereoselectivity of glycosylation reactions is affected by many factors. Synthesis of 1,2-cis glycosidic linkages (such as α linkages in glucose and galactose like monosaccharides) is challenging due to lack of control of the stereoselectivity. Our s
Linear synthesis of the tumor-associated carbohydrate antigens Globo-H, Ssea-3, and Gb3
Bosse, Folkert,Marcaurelle, Lisa A.,Seeberger, Peter H.
, p. 6659 - 6670 (2007/10/03)
The tumor-associated carbohydrate antigens Globo-H, SSEA-3, and Gb3 were synthesized in a linear fashion using glycosyl phosphate monosaccharide building blocks. All of the building blocks were prepared from readily available common precursors. The difficult α-(1→-4-cis)-galactosidic linkage was installed using a galactosyl phosphate donor with high selectivity. Introduction of the β-galactosamine unit required the screening a variety of amine protecting groups to ensure good donor reactivity and protecting group compatibility. An N-trichloroacetyl-protected galactosamine donor performed best for the installation of the β-glycosidic linkage. Conversion of the trichloroacetyl group to the N-acetyl group was achieved under mild conditions, fully compatible with the presence of multiple glycosidic bonds. This synthetic strategy is expected to be amenable to the synthesis of the globo-series of tumor antigens on solid-support.
Simple oxidation of 3-O-silylated glycals: Application in deblocking 3-0-protected glycals
Kirschning, Andreas,Hary, Ulrike,Plumeier, Claus,Ries, Monika,Rose, Lars
, p. 519 - 528 (2007/10/03)
A high yielding allylic oxidation of 3-O-siIylated glycals 5-10 with the reagent system PhI(OAc)2-TMSN3 is presented. The iodine(m) species generated under these conditions is a lot more effective for generating carbohydrate-derived 3-trialkylsiloxy-2,3-d