Toward synthesis of the regular sequence of heparin: synthesis of two tetrasaccharide precursors
摘要:
Two fully protected tetrasaccharides, which represent precursors for the synthesis of the regular sequence of heparin, were synthesized via coupling of a pair of disaccharide trichloroacetimidates with a thioglycoside and a glucosamine derivative, respectively, in a sequential manner. (c) 2006 Elsevier Ltd. All rights reserved.
Toward synthesis of the regular sequence of heparin: synthesis of two tetrasaccharide precursors
摘要:
Two fully protected tetrasaccharides, which represent precursors for the synthesis of the regular sequence of heparin, were synthesized via coupling of a pair of disaccharide trichloroacetimidates with a thioglycoside and a glucosamine derivative, respectively, in a sequential manner. (c) 2006 Elsevier Ltd. All rights reserved.
A facile preparation of uronates via selective oxidation with TEMPO/KBr/Ca(OCl)2 under aqueous conditions
作者:Feng Lin、Wenjie Peng、Wen Xu、Xiuwen Han、Biao Yu
DOI:10.1016/j.carres.2004.02.001
日期:2004.4
the TEMPO-mediated selective oxidation has the benefit of easier operation. A variety of partiallyprotected saccharide derivatives (1a-l) have been successfully converted into the corresponding uronate derivatives, including disaccharide building blocks for GAG fragments and precursors to saponins. The beneficial effect of Aliquat 336 was also disclosed in the oxidation of certain substrates.