Stereoselective Total Syntheses of Three <i>Lycopodium</i> Alkaloids, (−)-Magellanine, (+)-Magellaninone, and (+)-Paniculatine, Based on Two Pauson−Khand Reactions
作者:Takashi Kozaka、Naoki Miyakoshi、Chisato Mukai
DOI:10.1021/jo702136b
日期:2007.12.1
The totalsyntheses of (−)-magellanine, (+)-magellaninone, and (+)-paniculatine were completed from diethyl l-tartrate via the common intermediate in a stereoselective manner. The crucial steps in these syntheses involved two intramolecular Pauson−Khand reactions of enynes: the first Pauson−Khand reaction constructed the bicyclo[4.3.0] carbon framework, the corresponding A and B rings of these alkaloids