Synthesis of the Reported Structure of Pogostol and a Total Synthesis of (±)-Kessane without the Use of Protecting Groups
作者:Kevin I. Booker-Milburn、Helen Jenkins、Jonathan P. H. Charmant、Peter Mohr
DOI:10.1021/ol035373u
日期:2003.9.1
[reaction: see text] A short racemic synthesis of kessane from 4-hydroxy-4-methyl-2-cyclohexenone is described using a route that also resulted in the synthesis of the reported structure of pogostol. The key step involves an Fe(III)-mediated tandem radical ring-expansion/cyclization of the cyclopropylsilyl ether 9. No protecting groups are used in the entire sequence. Comparison of the NMR data of
The synthesis of (−)-kessane, starting from natural (+)-aromadendrene-II
作者:Henricus J.M. Gijsen、Joannes B.P.A. Wijnberg、Gerrit A. Stork、Aede de Groot
DOI:10.1016/s0040-4020(01)87109-x
日期:1991.1
Starting from the readily available chiral synthon 5 the sesquiterpene ether (−)-kessane (1) can be synthesized in a 9 steps reaction sequence in an overall yield of 43%.