Absolute Configuration of Resveratrol Oligomers Isolated from Hopea utilis. Issue 1 (January 2015)

• Record Type: Journal Article
• Authors: Ito, Tetsuro; Hoshino, Ryosuke; Iinuma, Munekazu
• Is Part Of: Helvetica chimica acta. Volume 98:Issue 1(2015:Jan.)
• Page Start: 32
• Page End: 46
• Publication Date: 2015-01
• Subjects: Chemistry -- Periodicals; Chemistry, Analytical -- periodicals; Chimie -- Périodiques; 540
• DOI: 10.1002/hlca.201400146
• Languages: English
• ISSNs: 0018-019X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Phytochemical studies on a stem of <italic>Hopea utilis</italic> (Dipterocarpaceae) resulted in the isolation of two new resveratrol derivatives, namely hopeaside E (<bold>1</bold>; resveratrol trimer) and hopeaside F (<bold>2</bold>; resveratrol pentamer), together with ten known resveratrol derivatives, <bold>3</bold>–<bold>12</bold>. The structures of the new compounds were elucidated by spectroscopic analyses, including NMR experiments, and their absolute configurations were determined on the basis of a comparative configurational analysis using the <italic>β</italic>‐<sc>D</sc>‐glucopyranosyl group and chiroptical data. The absolute configuration of (+)‐balanocarpol (<bold>3</bold>) was also determined by acid‐catalyzed skeletal conversion.</p> </abstract>