A highly efficient deprotection of the 2,2,2-trichloroethyl group at the anomeric oxygen of carbohydrates
摘要:
Commercially available zinc dust in the presence of ammonium chloride in acetonitrile at reflux removes the 2,2,2-trichloroethyl (ICE) group at anomeric centers with excellent yields (>95%) in short reaction times. This present method is easily implemented on substrates containing acyl and benzyl groups and large-scale reactions also proceed in high yield. (C) 2011 Elsevier Ltd. All rights reserved.
Commercially available zinc dust in the presence of ammonium chloride in acetonitrile at reflux removes the 2,2,2-trichloroethyl (ICE) group at anomeric centers with excellent yields (>95%) in short reaction times. This present method is easily implemented on substrates containing acyl and benzyl groups and large-scale reactions also proceed in high yield. (C) 2011 Elsevier Ltd. All rights reserved.