Efficient Synthesis of S-Linked Glycopeptides in Aqueous Solution by a Convergent Strategy
作者:Xiangming Zhu、Richard R. Schmidt
DOI:10.1002/chem.200305163
日期:2004.2.20
In naturally occurring glycopeptides and glycoproteins the glycan residues generally possess N- and O-linkages to the peptide backbone. Here we report the synthesis of the corresponding S-linkedglycopeptides by a convergent strategy to provide compounds which should be quite stable to glycosidases. To this end, peptides that contain beta-bromoalanine and gamma-bromohomoalanine were generated either
Allene transfer reactions. A new synthesis of terminal allenes
作者:Jack E. Baldwin、Robert M. Adlington、Amit Basak
DOI:10.1039/c39840001284
日期:——
Alkyl radicals, produced from alkyl bromides and iodides, react smoothly with triphenylprop-2-ynylstannane to provide terminalallenes; this newreaction has been applied to a simple and stereospecific synthesis of the naturally occurring allenic amino-acid, S-2-aminohexa-4,5-dienoic acid.
Synthesis of α-S-linked glycopeptides in water containing solution
作者:Xiangming Zhu、Richard R. Schmidt
DOI:10.1016/s0040-4039(03)01465-5
日期:2003.8
alpha-Thiols of N-acetylglucosamine and of N-acetylgalactosamine react with beta-bromoalanine containing peptides at pH 8.5 under phase transfer conditions or, alternatively, in aqueous DMF, cleanly to alpha-S-linked glycopeptides. Thus, mimetics of important O-glycopeptides can be readily prepared. (C) 2003 Elsevier Ltd. All rights reserved.