Abnormal Ito–Saegusa oxidation of TIPS enol ether assisted by a hydroxy group on a side chain
作者:Shiharu Hiraoka、Shinji Harada、Atsushi Nishida
DOI:10.1016/j.tetlet.2011.03.119
日期:2011.6
Although Ito–Saegusa oxidation gives defined α,β-unsaturated ketones from silyl enol ether of ketones controlled by the position of the sp2 carbon of the silyl enol ether, the formation of a regioisomeric product that was oxidized abnormally was observed. The structural requirements for the substrates, the conditions, and a plausible mechanism are presented.
Catalytic Enantioselective Total Synthesis of (−)-Platyphyllide and Its Structural Revision
作者:Shiharu Hiraoka、Shinji Harada、Atsushi Nishida
DOI:10.1021/jo1003746
日期:2010.6.4
The catalytic asymmetric totalsynthesis of platyphyllide has been accomplished. A key highly substituted cyclohexene derivative has been obtained by the catalytic asymmetric Diels−Alder reaction of Danishefsky diene with an electron-deficient alkene. The Diels−Alder adduct was converted to a protected cyclohexane-1,3-dione in chiral form by catalytic Ito−Saegusa oxidation. Although the reported structure