Formal Glycosylation of Quinones with <i>exo</i>-Glycals Enabled by Iron-Mediated Oxidative Radical–Polar Crossover
作者:Haijuan Liu、Adrien G. Laporte、Damien Tardieu、Damien Hazelard、Philippe Compain
DOI:10.1021/acs.joc.2c01635
日期:2022.10.7
exo-glycals under iron hydride hydrogen atom transfer (HAT) conditions is described. This method provides a direct and regioselective access to a wide range of phenolic O-ketosides related to biologically relevant natural products in diastereomeric ratios up to >98:2 in the furanose and pyranose series. No trace of the corresponding C-glycosylated products that might have resulted from the radical alkylation
Ketoheptoses, seven-carbon sugars, were recognized to display pharmacological properties that are potentially suitable for in vivo diagnostic of diabetes and cancers using ¹9F-MRI. The present paper describes efficient syntheses towards ketoheptoses and exemplary a series of regioisomeric fluoro derivatives of d-gluco-hept-2-ulose. ketoheptose - fluoro d-glucoheptulose - Petasis reagent - Selectfluor