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- W3205847392 abstract "Full text.Asymmetric hydrosilylation of acetophenone with transition metal complexes containing chiral ligands, is useful route to optically active 1-penyl ethanol. A large variety of chiral ligands can be used such as oxazolines, phosphines, phosphites and imines. If phosphorus containing ligands have a high efficiency in asymmetric reduction of ketones, they suffer from many disadvantages; difficult synthesis, high cost and limited stability. In the hydrosilylation of ketones chiral phosphines could not achieve high optical yields, while some nitrogen-containing organic ligands reported by Brunner attained an extremely high level of enantioselectivity:95-99% ee with Pythia-[Et, H]-Rh and Pybox-Pr-Rh catalysts. As excellent results have been obtained in the reaction with nitrogen ligands and (N,S) ligands (Pythia), we are interested on the use of optically pure thiourea ligands, which were developed and hydrogenation. The dithiourea compounds are very stable and their preparation is easy. The asymmetric hydrosilylation of acetophenone with the iridium-dithioureas catalysts gave a good activity and an enantioselectivity up to 74%." @default.
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- W3205847392 date "2002-07-01" @default.
- W3205847392 modified "2023-09-27" @default.
- W3205847392 title "Asymmetric hydrosilylation using transition metal complexes with chiral ligands" @default.
- W3205847392 hasPublicationYear "2002" @default.
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