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®
介绍了使用 thujone (1) 作为手性合成子的 (-)-Ambrox® (37) 和epi-Ambrox® (29) 的新合成方法的开发。Thujone (1) 是一种从西部红柏中获得的容易获得的原料,可以有效地转化为 β-cyperone (2),然后将后者化学加工成关键中间体,即烯酮 6。 6 到烯酮的羰基转位9 还允许正式合成 (-)-Polywood® (18)。关键词:thujone,β-cyperone,(-)-Ambrox®,epi-Ambrox®,合成。