A Bioinspired Approach to Tri-<i>nor</i>-guaianes. Synthesis of (−)-Clavukerin A
作者:Gonzalo Blay、Begoña García、Eva Molina、José R. Pedro
DOI:10.1021/np060184g
日期:2006.8.1
degradation of the C-7 side chain of related guaia-11-enes is described. In this approach (-)-clavukerin A (1) is obtained by selective ozonolysis-Criegge rearrangement of (+)-1alphaH,7alphaH,10alphaH-guaia-4,11-dien-3-one (4) to afford 7beta-hydroxy and 7beta-acetoxy tri-nor-guaiane derivatives 6 and 7, respectively, which after elimination and deoxygenation give the title compound. The starting guaiadienone