The Total Synthesis of (±)-Isocomene by an Intramolecular Ene Reaction. Preliminary communication
作者:Wolfgang Oppolzer、Kurt Bättig、Tomas Hudlicky
DOI:10.1002/hlca.19790620514
日期:1979.7.17
The racemic sesquiterpene isocomene (1) has been synthesized starting from 1,7-octadien-3-one (2) in a stereoselective manner (Scheme 2). In the key step 4 5 the C(7), C(8)-bond was formed by an intramolecular thermal ene reaction. Further elaboration of 5 involved the ring contraction 6 7, the elimination 8 9 and the final olefin isomerization 9 1.
Organosilicon-mediated total synthesis of the triquinane sesquiterpenes (±)-β-isocomene and (±)-isocomene
作者:Arndt W. Schmidt、Thomas Olpp、Elke Baum、Tina Stiffel、Hans-Joachim Knölker
DOI:10.1039/c0ob00051e
日期:——
We describe an efficient totalsynthesis of the sesquiterpenes (±)-β-isocomene and (±)-isocomene using a Lewis acid-promoted [3 + 2] cycloaddition of allyl-tert-butyldiphenylsilane as the key-step.
(±)Modhephene and (±)isocomene via cascade rearrangement
作者:Lutz Fitjer、Andreas Kanschik、Marita Majewski
DOI:10.1016/s0040-4039(00)80803-5
日期:1988.1
Dispiro[3.0.4.2] undecane 1 has been synthesized and rearranged to (±)modhephene 2 and triquinane 3 under kinetic control, and to (±)isocomene 4 and triquinane 5 under thermodynamic control. Molecular mechanics calculations (MM2) support the mechanism proposed.
Stereocontrolled synthesis of isocomene by a novel photocycloaddition–fragmentation strategy
作者:Viresh H. Rawal、Claire Dufour、Andrew Eschbach
DOI:10.1039/c39940001797
日期:——
Isocomene has been synthesized in a stereocontrolled manner by a novel strategy that utilizes a Paterno–Büchi reaction to build complexity and a selective reductive fragmentation to reveal a functionalized diquinane.
Enantio- and Diastereocontrolled Synthesis of an Angular Triquinane Sesquiterpene (+)-Arnicenone
作者:Yosuke Iura、Tsutomu Sugahara、Kunio Ogasawara
DOI:10.1021/ol006922o
日期:2001.1.1
[figure: see text] (+)-Arnicenone, a sesquiterpene of an angular triquinane isolated from Arnica plants, has been synthesized for the first time in an enantiocontrolled manner from a synthetic equivalent of chiral 2-hydroxymethylcyclopentadienone to determine the absolute configuration of the natural product as 1R,3aR,5aS,8aR.