The metal ion catalysed oxidation of hexahydrocolupulone
作者:E. Siaens、D. De Keukeleire、M. Verzele
DOI:10.1016/0040-4020(77)80098-7
日期:1977.1
4, catalysed by various metalions, gives mainly 4-hydroxyhexahydrocolupulone 5 and tetrahydrocohulupone 6 in different ratios, depending on the nature of the metalion. The maximum yield of the bitter-tasting 6 is 45%, if Co(II) acetate in 1,4-dioxan is used. The oxidation of hexahydrocolupulone 3 in 0.5% alcoholic cyclohexane in the presence of Cu(II) acetate affords two new neutral oxidation products