[EN] PROTECTED TETRASACCHARIDES, THEIR PROCESS OF PREPARATION AND THEIR USE AS TRANSGLUCOSYLASE ACCEPTOR SUBSTRATES IN THE CHEMO-ENZYMATIC SYNTHESIS OF SHIGELLA FLEXNERI SPECIFIC OLIGOSACCHARIDES [FR] TÉTRAHOLOSIDES PROTÉGÉS, LEUR PROCÉDÉ DE PRÉPARATION ET LEUR UTILISATION EN TANT QUE SUBSTRATS ACCEPTEURS DE TRANSGLUCOSYLASE DANS LA SYNTHÈSE CHIMIO-ENZYMATIQUE D'OLIGOSACCHARIDES SHIGELLA FLEXNERI SPÉCIFIQUES
Efficient route to orthogonally protected precursors of 2-acylamino-2-deoxy-3-O-substituted-β-d-glucopyranose derivatives and use thereof
作者:Julien Boutet、Tae Hee Kim、Catherine Guerreiro、Laurence A. Mulard
DOI:10.1016/j.tetlet.2008.06.052
日期:2008.9
An efficient route to two 3-O-acyl-2-deoxy-4,6-O-isopropylidene-2-trichloroacetamido-D-glucopyranosyl trichloroacetimidate donors is reported. As demonstrated for the 3-O-acetyl derivative, these building blocks are exquisite beta-D-glucosamine donors when reacted either with simple alcohols or with complex oligosaccharides. Besides, their protection pattern is compatible with selective deprotection and subsequent chain elongation at O-3 of the newly incorporated glucosamine residue. (C) 2008 Elsevier Ltd. All rights reserved.