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A new axially chiral ligand, 1,1'-(2,2'-bisacylamino)binaphthalene, was found to be effective in the ytterbium-catalyzed asymmetric Diels-Alder reaction between cyclopentadiene and crotonyl-1,3-oxazolidin-2-one. The Diels-Alder reaction using 15 mol% of 1,1'-(2,2'-bisbenzoylamino)binaphthalene*Yb(OTf) 3 *2i-Pr 2 NEt afforded the adduct with high enantioselectivity (97% yield, endo/exo=91/9,...
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