Studies toward the Total Synthesis of Dumsin. 2. A Second Generation Approach Resulting in Enantioselective Construction of a Functionalized ABC Subunit of the Tetranortriterpenoid Insect Antifeedant
作者:Leo A. Paquette、Yang Hu、Andreas Luxenburger、Raynauld L. Bishop
DOI:10.1021/jo062068o
日期:2007.1.1
seco ketoacid. The same advanced intermediate was obtained by initially positioning the double bond internal to the five-membered ring in advance of transient ring expansion via diketone formation and intramolecularaldolization. Both of these approaches bypass the complications arising from the substantial steric congestion prevailing in these structural networks. The task of covalently positioning an