作者:Yuri V. Mironov、Andrei A. Sherman、Nikolay E. Nifantiev
DOI:10.1016/j.mencom.2008.09.003
日期:2008.9
The homogeneous azidophenylselenylation of diversely protected mono-, di- and trisaccharide glucals was studied to evaluate the influence of protective groups, N-3 and I donors, temperature and solvent on the stereoselectivity of the formation of corresponding phenyl 2-azido-2-deoxy-1-seleno-alpha-D-gluco- and -manno-adducts.
The Particular Sensitivity of Silyl Ethers of <scp>d</scp>-Glucal toward Two Vilsmeier−Haack Reagents POCl<sub>3</sub>·DMF and (CF<sub>3</sub>SO<sub>2</sub>)<sub>2</sub>Ο·DMF. Their Unique and Selective Conversion to the Corresponding C(6)-<i>O</i>-Formates
作者:Jean-Paul Lellouche、Sylvain Koeller
DOI:10.1021/jo005540t
日期:2001.2.1
The two electrophilic Vilsmeier-Haack reagents POCl3. DMF 2 or (CF3SO2)(2)O . DMF 3 mediate the one-step and selective conversion of O-triethylsilyl (O-TES), O-tert-butyldimethylsilyl (O-TBDMS), O-tert-butyldiphenylsilyl (O-TBDPS), and O-triisopropylsilyl (O-TIPS) ethers of D-glucal to the corresponding C(6)-O-formates.
A stereoselective route from glycals to asparagine-linked N-protected glycopeptides
作者:Frank E. McDonald、Samuel J. Danishefsky
DOI:10.1021/jo00052a001
日期:1992.12
Iodosulfonamidation of glycals followed by azidolysis produces anomerically pure 1beta-azido,2alpha-sulfonamidohexoses. Reduction of the azides, acylation of the resultant amines with an aspartic acid derivative, and deprotection of the 2-acetylamino function constitutes a completely stereospecific synthesis of asparagine-linked glycopeptide precursors from glycals.