An Improved Chiral Auxiliary for the Allene Ether Version of the Nazarov Cyclization
摘要:
alpha-2-Deoxy-D-glucose derived ether 14 is a superior reagent for the allene ether version of the Nazarov cyclization. Enantiomeric excesses of products derived from trisubstituted morpholino enamides varied between 85% and 93% ee.