Stereoselective total synthesis of dinemasone A by double intramolecular hetero-Michael addition (DIHMA)
作者:Gangavaram V. M. Sharma、Gourishetty Srikanth、Pothula Purushotham Reddy
DOI:10.1039/c2ob26396c
日期:——
The first totalsynthesis of dinemasone A, a bioactive metabolite with a spiroketal moiety, is described. The main strategy for the construction of the spiroketal unit involves a double intramolecular hetero-Michael addition (DIHMA) of an ynone moiety. The thus obtained axial–equatorial mono anomeric spiroketal, on spiroepimerization with ZnBr2, was converted into the requisite axial–axial double anomeric