Selectively protected galactose derivatives for the synthesis of branched oligosaccharides
摘要:
Synthesis and characterization of several new anomerically pure galactose derivatives, based on simple and effective protective group manipulations of benzyl beta-D-galactopyranoside, are reported. The monosaccharides described contain selectively protected/deprotected hydroxyl functionalities at their 1,2,3,4- and 6-positions rendering them useful as building blocks for construction of branched oligosaccharides. (C) 2004 Elsevier Ltd. All rights reserved.
New-to-Nature D-半乳糖基溶血磷脂经过合理设计和合成,可作为磷脂酰肌醇磷酸激酶的人工底物和非 ATP 竞争性抑制剂,磷脂酰肌醇磷酸激酶是经过验证的致命人类疾病(包括癌症、肌萎缩侧索硬化和 SARS- COVID-2 感染。D-半乳糖基溶血磷脂作为磷脂酰肌醇磷酸激酶的选择性底物和非 ATP 竞争性抑制剂的合理设计和合成(X. Huang、J. Hu 等人)
Acyl Group Migration and Cleavage in Selectively Protected β-<scp>d</scp>-Galactopyranosides as Studied by NMR Spectroscopy and Kinetic Calculations
作者:Mattias U. Roslund、Olli Aitio、Johan Wärnå、Hannu Maaheimo、Dmitry Yu. Murzin、Reko Leino
DOI:10.1021/ja801177s
日期:2008.7.1
protective groups and their relative stabilities at variable pH for a series of beta- d-galactopyranoses were studied by NMR spectroscopy. The clockwise and counterclockwise migration rates for the different ester groups were accurately determined by use of a kinetic model. The results presented provide new insights into the acid and base stabilities of commonly used ester protectinggroups and the phenomenon
作者:Hartmut Redlich、Wolfgang Sudau、Anna Katrin Szardenings、Roland Vollerthun
DOI:10.1016/0008-6215(92)84055-w
日期:1992.3
7-Deoxy-7-iodohept-1-enitols react intramolecularly to give 5-carba analogues of pyranoses (pseudo sugars) by the action of tributyltin hydride, which generates a radical at C-7. The configuration at the new chiral centre depends on the relative orientation of the oxygen functions in the starting material and the pattern of substitution.