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Phosphorus, Sulfur, and Silicon and the Related Elements Volume 143, 1998 - Issue 1
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Original Articles

STEREOSTRUCTURE OF ISOMERIC (±)-1-THIOFLAVANONE 1-OXIDES

Attila Csaba Bényei Department of Chemistry, Laboratory for X-ray Diffraction, Kossuth Lajos University, PO. Box 7, H-4010, Debrecen, Hungary
&
Laszlo Somogyi Research Group for Antibiotics, Hungarian Academy of Sciences, PO. Box 70, H-4010, Debrecen, Hungary; Egyetem sugárút 36, H-4027, Debrecen, Hungary; Dept. of Org. Chemistry, L. Kossuth University, P.O. Box 20, H-4010, Debrecen, Hungary
Pages 191-196 | Received 03 Nov 1998, Published online: 04 Oct 2006
 
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Abstract

The synthesis, separation and stereochemistry of 1-epimeric (k)-1-thioflavanone 1-oxide isomers with equatorial phenyl group are described. The higher melting isomer (2a) has a 12-cis-, the lower melting one (2b) a 1,2-trans configuration. 1H NMR and mass spectral data for both isomers and X-ray diffraction analysis of 2a are also presented.

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