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MAGNESIUM ION CATALYSED ISOMERIZATION OF HUMULONE: A NEW ROUTE TO PURE ISOHUMULONES*
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This method and its product is subject of pending world wide patent applications (inventors: H. Köller, A. Haiti, G. Kirchner).
Abstract
Magnesium ion catalysed isomerization of humulone leads to a mixture of two stereo-isomeric isohumulones without detectable formation of side-products or degradation products. Catalytically-produced isohumulone consists of 45 ± 4% cisisohumulone (colourless crystals m.p. 64° C; [α]20D =-8·9°) and of 55 ± 4% trans-isohumulone (yellow oil).
