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- W2076688558 endingPage "540" @default.
- W2076688558 startingPage "535" @default.
- W2076688558 abstract "The chiral sulfonamide-thiophosphoramide ligand L1, prepared from the reaction of (1R,2R)-(−)-1,2-cyclohexanediamine with diphenylthiophosphoryl chloride and p-toluenesulfonyl chloride, was used as a chiral ligand in Cu(MeCN)4ClO4-promoted catalytic asymmetric addition of diethylzinc to cyclic enones using LiCl as an additive in which up to 90% ee can be realized under mild conditions within 0.5 h. This chiral ligand is stable and recoverable after usual work-up and can be reused in the same catalytic asymmetric reaction. Moreover, it was found that this series of chiral ligands represents a type of S,O-bidentate ligands on the basis of 1H NMR, 31P NMR and 13C NMR spectroscopic investigations. The linear effect of ligand ee and product ee further revealed that the active species is a monomeric Cu(I) complex bearing a single ligand." @default.
- W2076688558 created "2016-06-24" @default.
- W2076688558 creator A5074708328 @default.
- W2076688558 creator A5086152877 @default.
- W2076688558 date "2005-03-01" @default.
- W2076688558 modified "2023-10-10" @default.
- W2076688558 title "Asymmetric 1,4-Addition of Diethylzinc to Cyclic Enones Catalyzed by Cu(I)-Chiral Sulfonamide-Thiophosphoramide Ligands and Lithium Salts" @default.
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