Enantiodivergent Total Syntheses of (+)- and (−)-Scopadulcic Acid A
作者:Martin E. Fox、Chi Li、Joseph P. Marino、Larry E. Overman
DOI:10.1021/ja990404v
日期:1999.6.1
first enantioselectivetotalsynthesis of scopadulcic acid A is described. The key step is a cascade intramolecularHeckreaction of a methylenecycloheptene iodide, which generates the B, C, and D rings of the scopadulan ring system in 90% yield as a single stereoisomer. A distinctive feature of these syntheses is the use of stereoselective enolization to dictate which enantiomer of the natural product