Synthesis of 3-O-(β-D-xylopyranosyl-(1→2)-β-D-glucopyranosyl)-3′-O-(β-D-glucopyranosyl)tamarixetin, the putative structure of aescuflavoside A from the seeds of Aesculus chinensis

3-O-(beta-D-Xylopyranosyl-(1 -> 2)-beta-D-glucopyranosyl)-3'-O-(beta-D-glucopyranosyl)tamarixetin, the Putative flavorial glycoside named aesculflavoside A isolated from the seeds of Aesculus chinensis, is synthesized via regioselective glycosylation of 7-O-benzyltamarixetin with glycosyl bromides under phase-transfer-catalyzed conditions. (c) 2006 Elsevier Ltd. All rights reserved.