摘要:
A concise method to construct a unique 2,6-branched trisaccharide was established by regioselective glycosylation of three free hydroxyl groups on a 3-O-protected glucose moiety, and successfully used in the synthesis of quercetin 3-O-beta-D-apiofuranosyl-(1 -> 2)-[alpha-L-rhamnopyranosyl-(1 -> 6)]-beta-D-glucopyranoside, a flavonol O-glycoside isolated from glandless cotton seeds which showed notable antidepressant activities. (C) 2011 Elsevier Ltd. All rights reserved.