The chemistry of thujone. XX. New enantioselective syntheses of Ambrox and <i>epi</i>-Ambrox
作者:James P. Kutney、Carles Cirera
DOI:10.1139/v97-136
日期:1997.8.1
epi-Ambrox® (29) using thujone (1) as a chiral synthon, is presented. Thujone (1), a readily available starting material obtained from Western red cedar, can be efficiently converted to β-cyperone (2) and the latter is then chemically elaborated to the key intermediate, the enone 6. A carbonyl transposition of 6 to enone 9 also allows a formal synthesis of (−)-Polywood® (18). Keywords: thujone, β-cyperone, (−)-Ambrox®