AbstractThe pyrolysis of elemol (1) in the presence of benzoic or p‐nitrobenzoic acid, and of elemyl‐p‐nitrobenzoate (3) was studied. From the many products formed, the compounds 6, 7, 8, 10, 11, 14, 15 and 18 were isolated and identified. On the basis of systematic experiments in the elemol (1) and dihydrogeijerene (26) series the sequence of the formation of these products could be determined. Several factors influencing the compositions of the pyrolysis mixtures are discussed.The products of pyrolysis of both series [elemol (1) and dihydrogeijerene (26), respectively] were catalytically hydrogenated, yielding the saturated hydrocarbons 34, 35–37, and 38–40, respectively.The synthesis of racemic dihydrogeijerene (26) was achieved starting from germacrone (41).
Identification of the bicyclic sesquiterpenes drimane and eudesmane in petroleum
作者:Robert Alexander、Robert Kagi、Rohinton Noble
DOI:10.1039/c39830000226
日期:——
Drimane and eudesmane have been identified in petroleum; eudesmane is formed from higher plant precursors while drimane is probably derived from microbial sources.
Acanthellin-1, an unique isonitrile sesquiterpene from the sponge Acanthella acuta
作者:L. Minale、R. Riccio、G. Sodano
DOI:10.1016/s0040-4020(01)97245-x
日期:1974.1
A number of unique isonitrile sesquiterpenes have been isolated from the spongeAcanthella acuta. One of them acanthellin-1, with antimicrobial activity, is shown to be 1 with a 4-epi-eudesmane skeleton.