The chemistry of the natural order cupressales—XXI
作者:C. Enzell、H. Erdtman
DOI:10.1016/0040-4020(58)80057-5
日期:1958.1
An aromatic sesquiterpene, cuparene (IV), has been isolated from Chamaecyparis thyoides, Biota orientalis and Widdringtonia. Cuparene gives terephthalic acid on oxidation with dilute nitric acid and (+)-camphonanic acid (III) on prolonged treatment with ozone and is therefore 1-(4-methylphenyl)-1:2:2-trimethylcyclopentane. Oxidation of cuparene with chromium trioxide gives the corresponding substituted