A high-yielding, one-pot preparation of unsymmetrical glycosyl disulfides using 1-chlorobenzotriazole as an in situ trapping/oxidizing agent

被引:26
作者
Stellenboom, Nashia [1 ]
Hunter, Roger [1 ]
Caira, Mino R. [1 ]
Szilagyi, Laszlo [2 ]
机构
[1] Univ Cape Town, Dept Chem, ZA-7701 Rondebosch, South Africa
[2] Univ Debrecen, Dept Organ Chem, H-4010 Debrecen, Hungary
基金
新加坡国家研究基金会;
关键词
Unsymmetrical disulfide synthesis; Diglycosyl disulfide; BtCl; Sugar thiols; SOLID-PHASE; SELECTIVE GLYCOSYLATION; CONFORMATIONAL-ANALYSIS; DERIVATIVES; PROTEINS; TETRATHIOMOLYBDATE; GLYCOSYLDISULFIDES; DISACCHARIDE; CHEMISTRY; REAGENTS;
D O I
10.1016/j.tetlet.2010.07.176
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A high-yielding, one-pot methodology for preparing unsymmetrical glycosyl disulfides derived from sugar, alkyl/aryl or cysteine thiols is reported using 1-chlorobenzotriazole (BtCl) as the oxidant. The highlight of the method is the low temperature of coupling (-78 degrees C) as well as the in situ trapping of the sulfenyl intermediate, which ensures that no homodimer of (RSH)-S-1 ((RSSR1)-S-1) is formed. The coupling efficiency is independent of sugar type, thiol position in the sugar, sugar-protecting groups, and the various products serve to illustrate the rapid synthetic access to a number of model systems in glycobiology. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:5309 / 5312
页数:4
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