AuCl3-AgOTf promoted O-glycosylation using anomeric sulfoxides as glycosyl donors at room temperature
作者:Ashokkumar Palanivel、Ande Chennaiah、Sateesh Dubbu、Asadulla Mallick、Yashwant D. Vankar
DOI:10.1016/j.carres.2016.11.012
日期:2017.1
glycosyl donors using AuCl3/AgOTf reagent system has been described. Under optimal reaction conditions, both armed and disarmed glycosyl sulfoxide donors were found to react with a range of primary, secondary, and tertiary alcohol acceptors, and sugar derived glycosyl acceptors to afford the corresponding glycosides in moderate to good yields with predictable selectivity. The reactions are quick (20-60 min)
Green glycosylation promoted by reusable biomass carbonaceous solid acid: an easy access to β-stereoselective terpene galactosides
作者:Bala Kishan Gorityala、Jimei Ma、Kalyan Kumar Pasunooti、Shuting Cai、Xue-Wei Liu
DOI:10.1039/c0gc00883d
日期:——
An efficient green protocol has been developed for the atom economic glycosylation of unprotected, unactivated glycosyl donors and glycosylation of glycosyl trichloroacetimidates with the aid of reusable eco-friendly biomass carbonaceous solid acid as catalyst.
Solution and Solid-Phase Stereocontrolled Synthesis of 1,2-<i>cis</i>-Glycopyranosides with Minimally Protected Glycopyranosyl Donors Catalyzed by BF<sub>3</sub>–<i>N</i>,<i>N</i>-Dimethylformamide Complex
作者:Gabrielle St-Pierre、Stephen Hanessian
DOI:10.1021/acs.orglett.6b01263
日期:2016.7.1
Methods are described for the stereoselective synthesis of 1,2-cis glycopyranosides in the d-galacto, d-gluco, and 2-azido-2-deoxy-d-glucopyranoside series utilizing minimally protected (3-bromo-2-pyridyloxy) β-d-glycopyranosyl donors in the presence of BF3–N,N-dimethylformamide (DMF) as a catalyst and a variety of alcohol acceptors relying on the “remote activation concept”. Precursors to antifreeze