FRAUENRATH, H.;PHILIPPS, T., ANGEW. CHEM., 1986, 98, N 3, 261-262
作者:FRAUENRATH, H.、PHILIPPS, T.
DOI:——
日期:——
Asymmetric catalysis. Part 127:Enantioselective desymmetrization of 2-n-butyl-4,7-dihydro-1,3-dioxepin with (η6-arene)ruthenium(II) half-sandwich complexes
作者:Henri Brunner、Markus Prommesberger
DOI:10.1016/s0957-4166(98)00329-2
日期:1998.9
(eta(6)-Arene)ruthenium half-sandwich complexes are highly active and stereoselective catalysts in the enantioselective desymmetrization of 2-n-butyl-4,7-dihydro-1,3-dioxepin to give 2-n-butyl-4,5-dihydro-1,3-dioxepin. Enantioselectivities up to 61% ee were achieved. The temperature and solvent dependence of the catalysis as well as the activation of the catalyst were investigated. (C) 1998 Elsevier Science Ltd. All rights reserved.
Stereoselective synthesis of tetrahydrofuran-3-carbaldehyde
The optically active complex [(-)-diop]Rh(mu(2)-H)(2)WCp2}PF6 was prepared and characterized. In four different models of enantioselective catalysis the complex gave the same enantioselectivity as the catalysts [Rh(cod)Cl](2)/(-)-diop and [Rh(cod)Cl](2)/(-)-diop/Cp2WH2. (C) 1999 Elsevier Science S.A. All rights reserved.