Title of article
Parvistemins A–D, a new type of dimeric phenylethyl benzoquinones from Stemona parviflora Wright
Author/Authors
Xinzhou Yang، نويسنده , , Tobias A.M. Gulder، نويسنده , , Matthias Reichert، نويسنده , , Chunping Tang، نويسنده , , Changqiang Ke، نويسنده , , Yang Ye، نويسنده , , Gerhard Bringmann، نويسنده ,
Issue Information
هفته نامه با شماره پیاپی سال 2007
Pages
7
From page
4688
To page
4694
Abstract
Four naturally occurring dimeric phenylethyl benzoquinones, parvistemins A–D, were isolated from the aerial parts of Stemona parviflora Wright. Their constitutions were established by spectroscopic methods. Due to restricted rotation about the central biaryl axis, the compounds are chiral, although racemic. Their two respective atropo-enantiomers were resolved by HPLC on a chiral phase and were stereochemically characterized online, in hyphenation with circular dichroism (CD) spectroscopy (LC–CD coupling), combined with quantum chemical CD calculations.
Keywords
benzoquinones , quantum chemical CD calculations , axial chirality , Circular dichroism (CD)
Journal title
Tetrahedron
Serial Year
2007
Journal title
Tetrahedron
Record number
1090820
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