New Chiral Sultam Auxiliaries: Preparation and Their Application in Asymmetric Diels—Alder Reactions.

Abstract Enantiomerically pure sultams (+)- 4 and (−)- 4 were synthesized from tricyclic sultone 1 via a four-step reaction sequence. Their uses as new chiral auxiliaries in asymmetric Diels-Alder reactions with diastereoselectivity up to 94:6 are presented.