Le catalyseur chiral est genere a partir de TiCl 2 (i-PrO) 2 et du (methyl-2 phenyl-2, α,α,α',α'-tetraphenyl) dioxolanne-1,3 dimethanol-4,5,chiral
Le catalyseur chiral estgenere a partir de TiCl 2 (i-PrO) 2 et du (methyl-2 phenyl-2, α,α,α',α'-tetraphenyl) dioxolanne-1,3 dimethylethanol-4,5,chiral
Lanthanide(III)-Catalyzed Enantioselective Diels-Alder Reactions. Stereoselective Synthesis of Both Enantiomers by Using a Single Chiral Source and a Choice of Achiral Ligands
作者:Shu Kobayashi、Haruro Ishitani
DOI:10.1021/ja00088a056
日期:1994.5
approach to obtaining bothenantiomers; choice of enatiofacial selectivity by use of the enatiomerically same chiralsource and different achiralligands. Bothenantiomers of the Diels-Alder adducts between e-acyl-1,3-oxazolidin-2-ones and cyclopentadiene were prepared by chirallanthanides(III)-catalyzedreactionsusing the same chiralsource, (R)-(+)-binaphthol. It is noted that the chiral catalysts with