1,3-Dipolar cycloaddition of sugar azides with benzyne: a novel synthesis of 1,2,3-benzotriazolyl glycoconjugates
作者:Basi V. Subba Reddy、Karanam Praneeth、Jhillu S. Yadav
DOI:10.1016/j.carres.2010.12.015
日期:2011.6
Glycosylazides undergo smooth 1,3-dipolarcycloaddition with benzyne generated in situ from 2-(trimethylsilyl)phenyltrifluoromethanesulfonate and cesium fluoride under mild conditions to furnish 1,2,3-benzotriazole-linked glycoconjugates in excellent yields and with high stereoselectivity. This method provides a novel class of benzotriazole linked glycoconjugates in a single-step reaction. This is
Boronic Acid-Catalyzed Regio- and Stereoselective <i>N</i>-Glycosylations of Purines and Other Azole Heterocycles: Access to Nucleoside Analogues
作者:Shrey P. Desai、Giorgos Yatzoglou、Julia A. Turner、Mark S. Taylor
DOI:10.1021/jacs.3c14434
日期:2024.2.21
In the presence of an arylboronic acid catalyst, azole-type heterocycles, including purines, tetrazoles, triazoles, indazoles, and benzo-fused congeners, undergo regio- and stereoselective N-glycosylations with furanosyl and pyranosyl trichloroacetimidate donors. The protocol, which does not require stoichiometric activators, specialized leaving groups, or drying agents, provides access to nucleoside