Catalytic asymmetric aza Diels-Alder reactions using a chiral lanthanide Lewis acid. Enantioselective synthesis of tetrahydroquinoline derivatives using a catalytic amount of chiral source

Article abstract of DOI:10.1016/0040-4039(96)01655-3

In the presence of a catalytic amount of the chiral ytterbium Lewis acid, which was prepared from Yb(OTf)₃, (R)-(+)-BINOL, diazabicyclo[5.4.0]undec-7-ene (DBU), and an additive, achiral imines reacted with achiral dienophiles to afford the corr