Diastereoselective Synthesis of the <i>e</i><i>ndo</i>- and <i>e</i><i>xo</i>-Spirotetronate Subunits of the Quartromicins. The First Enantioselective Diels−Alder Reaction of an Acyclic (<i>Z</i>)-1,3-Diene
作者:William R. Roush、Chris Limberakis、Roxanne K. Kunz、David A. Barda
DOI:10.1021/ol025772+
日期:2002.5.1
Diastereoselective syntheses of the endo- and exo-spirotetronates 1 and 2, corresponding to the galacto and agalacto fragments of quartromicins A(3) and D-3, are described. The key step of these syntheses are highly enantio- and diastereoselective Lewis acid catalyzed Diels-Alder reactions of the 1,1,3,4-tetrasubstituted diene 3.