Amine(imine)diphosphine Iron Catalysts for Asymmetric Transfer Hydrogenation of Ketones and Imines
作者:Weiwei Zuo、Alan J. Lough、Young Feng Li、Robert H. Morris
DOI:10.1126/science.1244466
日期:2013.11.29
hydrogenation catalyst that uses a ligand rationally designed after careful mechanistic study. Jagadeesh et al. (p. 1073) prepared supported iron catalysts that selectively reduce nitro substituents on aromatic rings to amines, thereby facilitating the preparation of a wide range of aniline derivatives. Ligand design based on mechanisticinsight enables highly efficient iron catalysis. [Also see Perspective by
IRON(II) CATALYSTS CONTAINING DIIMINO-DIPHOSPHINE TETRADENTATE LIGANDS AND THEIR SYNTHESIS
申请人:THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO
公开号:US20140243543A1
公开(公告)日:2014-08-28
New hexa-coordinate iron (II) complexes comprising compounds of formula (I) are described. These compounds comprise a tetradentate ligand with donor atoms comprising nitrogen and phosphorus. These complexes are shown for the first time to be useful catalysts for the hydrogenation of ketones, aldehydes, or imines to produce alcohols or amines, and the asymmetric hydrogenation of prochiral ketones or imines to produce non-racemic alcohols or amines. The source of the hydrogen can be hydrogen gas or a hydrogen-donating molecule such as isopropanol or hydrogen-donating mixture such as formic acid and an amine depending on the structure of the catalyst. In certain embodiments, the axial ligands on the catalyst comprise organonitrile ligands, carbonyl ligands, isonitrile ligands, or combinations thereof. The catalysts and the preparation thereof are disclosed. A reaction using phosphine and diamine precursors that is templated by the iron ion is the preferred route to the catalysts.
Phosphine-borane complexes; direct use in asymmetric catalysis
作者:Hugues Brisset、Yann Gourdel、Pascal Pellon、Maurice Le Corre
DOI:10.1016/0040-4039(93)88075-t
日期:1993.7
An easy and soft method of decomplexation of phosphine-borane complexes, by DABCO, allows its use in situ in asymmetric catalytic hydrogenation of double bonds with metal phosphine complexes.
Matt, Dominique; Ziessel, Raymond; De Cian, Andre, New Journal of Chemistry, 1996, vol. 20, # 12, p. 1257 - 1263
作者:Matt, Dominique、Ziessel, Raymond、De Cian, Andre、Fischer, Jean
DOI:——
日期:——
1,4-Disubstituted-2,3,4,6-tetrahydroxy-1,4-diphosphorinane and their oxides or sulfides