SYNTHESES IN THE TERPENE SERIES: VIII. SYNTHESIS OF THE <i>CIS</i>- AND <i>TRANS</i>-ISOMERS OF 7,7,10-TRIMETHYLDECAL-1-ONE. A CONVENIENT MODIFICATION OF THE BROWN HYDRATION REACTION
作者:Franz Sondheimer、Saul Wolfe
DOI:10.1139/v59-274
日期:1959.11.1
7,7,10-Trimethyl-Δ1(9)-octal-2-one (VII) was converted to the cycloethylenedithioketal (VIII), which on Raney nickel reduction yielded 7,7,10-trimethyl-Δ1(9)-octalin (IX). Oxidation with perbenzoic...
957. Studies in the synthesis of terpenes. Part V. Some bicyclic intermediates for triterpene synthesis
作者:T. G. Halsall、M. Moyle
DOI:10.1039/jr9600004931
日期:——
471. An approach to the total synthesis of triterpenes. Part I
作者:T. G. Halsall、D. B. Thomas
DOI:10.1039/jr9560002431
日期:——
The synthesis of angular methyl substituted bicyclic enones via a unique regioselective enamine annulation reaction
作者:W.M.B. Könst、J.G. Witteveen、H. Boelens
DOI:10.1016/0040-4020(76)85022-3
日期:1976.1
Enamines of 2,4,4-trimethylcyclopentanone 5 and of 2,5,5-trimethylcyclohexanone 14 react with methyl vinyl ketone to afford the bicyclic enones 9 and 15 in yields up to 70%. The formation of these products bearing an angular Me group is the result of an anomalous enamine Robinson annulation reaction, due to an alkylation of the enamine in the first step at its most substituted α-position. The effect