Asymmetric diels-alder reaction between the chiral isoprene units 2-(r)-and (s)-benzyloxy-2,5-dihydro-4-furancarboxaldehyde and cyclopentadiene
The title Diels-Alder reaction gave a mixture of enantiomerically pure adducts with complete norbornane-type monoterpene skeletons. The exo/endo ratio of the products changed from approximately 4:1 at 5° to 2:1 at 165°
