Enantiomerically pure sultams (-)-2, (+)-3 and (+)-4 were synthesized.Their uses as new chiral auxiliaries in asymmetric Diels-Alder reactions with diastereoselectivity up to 99∶1 are presented. The relationship betw...Enantiomerically pure sultams (-)-2, (+)-3 and (+)-4 were synthesized.Their uses as new chiral auxiliaries in asymmetric Diels-Alder reactions with diastereoselectivity up to 99∶1 are presented. The relationship between the structure of chiral sultam and the effectiveness of asymmetric induction in Diels-Alder reactions are also discussed.展开更多
文摘Enantiomerically pure sultams (-)-2, (+)-3 and (+)-4 were synthesized.Their uses as new chiral auxiliaries in asymmetric Diels-Alder reactions with diastereoselectivity up to 99∶1 are presented. The relationship between the structure of chiral sultam and the effectiveness of asymmetric induction in Diels-Alder reactions are also discussed.