Transition-metal-free synthesis of aryl 1-thioglycosides with arynes at room temperature
作者:Yao Liu、Xiao-Bing Yu、Xiang-Mei Zhang、Qian Zhong、Li-Hua Liao、Nan Yan
DOI:10.1039/d1ra04013h
日期:——
transition-metal-free protocol for the synthesis of aryl 1-thioglycosides is presented via arynes generated in situ combined with glycosyl thiols in the presence of TBAF(tBuOH)4. The methodology provides a general and efficient way to prepare a series of functionalized thioglycosides in good to excellent yields with a perfect control of the anomeric configuration at roomtemperature. In addition, the reaction
在 TBAF( t BuOH) 4存在下,通过原位生成的芳烃与糖基硫醇结合,提出了一种温和、方便且不含过渡金属的芳基 1-硫糖苷合成方案。该方法提供了一种通用且有效的方法来制备一系列功能化的硫糖苷,并在室温下完美控制异头构型。此外,反应条件耐受多种戊糖和己糖,反应在受保护的单糖和二糖上也能顺利进行。
Binding Affinity Properties of Dendritic Glycosides Based on a β-Cyclodextrin Core toward Guest Molecules and Concanavalin A
作者:Fernando Ortega-Caballero、Juan J. Giménez-Martínez、Luis García-Fuentes、Emilia Ortiz-Salmerón、Francisco Santoyo-González、Antonio Vargas-Berenguel
DOI:10.1021/jo015875q
日期:2001.11.1
thermodynamic parameters for the inclusion complex formation of these beta-cyclodextrin derivatives with guests sodium 8-anilino-1-naphthalensulfonate (ANS) and 2-naphthalenesulfonate. The host capability of the persubstituted beta-cyclodextrins decreased with respect to the native beta-CD when sodium 2-naphthalenesulfonate was used as a guest and improved when ANS was used as a guest molecule. Heptavalent mannoclusters
Electrochemically Mediated S-Glycosylation of 1-Thiosugars with Xanthene Derivatives
作者:Rui-Qi Wang、Qing-Hui Jiang、Hui-Xiang Wang、Xiao-Wei Zhang、Nan Yan
DOI:10.1021/acs.orglett.3c01185
日期:2023.6.16
electrochemical dehydrogenativecross-coupling of benzylic C–H bonds with 1-thiosugars at room temperature is described. The direct S-glycosylation protocol avoids using any oxidant, which provides facile access to various glycosylated xanthene derivatives with up to 91% yield. This current electrooxidative reaction is characterized by high atom economy, high efficiency, mild reaction conditions, being