Diastereoselective Diels−Alder Reactions with an Allenyl-Containing Spiro-Amido Chiral Auxiliary
摘要:
A novel allenyl-containing 1,3-spiro-amido alcohol auxiliary has been prepared and used in a variety of diastereo-selective Diels-Alder reactions providing exclusively endo adducts with diastereomeric ratios ranging from 2:1 to > 99:1.