Synthetic Studies toward the Bicyclic Peroxylactone Core of Plakortolides
作者:Jean-Michel Vatèle、Bogdan Barnych
DOI:10.1055/s-0030-1260959
日期:2011.8
Enroute to the synthesis of plakortolide E and I, we prepareda β-hydroperoxy vinyl epoxide, obtained from ( R)-epi-chlorhydrin in 13 stepsand 30% yield, via chemoselective methylenation with Nystedreagent in the presence of Ti(O I-Pr) 2 Cl 2 andregioselective Mukaiyama-Isayama hydroperoxysilylation. Unexpectedly,acid-catalyzed cyclization of this peroxy epoxide occurred exclusivelythrough a 5- EXO