Iron(II) Complexes Containing Unsymmetrical P–N–P′ Pincer Ligands for the Catalytic Asymmetric Hydrogenation of Ketones and Imines
作者:Paraskevi O. Lagaditis、Peter E. Sues、Jessica F. Sonnenberg、Kai Yang Wan、Alan J. Lough、Robert H. Morris
DOI:10.1021/ja4082233
日期:2014.1.29
hydrogenation using iron. The complexes are prepared in two steps: (1) a one-pot reaction of phosphonium dimers ([cyclo-(PR2CH2CH(OH)(-))2][Br]2), KOtBu, FeBr2, and Ph2PCH2CH2NH2 (or (S,S)-Ph2PCH(Ph)CH(Me)NH2 for the enantiopure complex) in THF under a CO atmosphere to produce the complexes cis- and trans-[Fe(Br)2(CO)(P-CH═N-P')]; (2) the reaction of these with AgBF4 under CO(g) to afford the dicarbonyl complexes
IRON(II) CATALYSTS CONTAINING TRIDENTATE PNP LIGANDS, THEIR SYNTHESIS, AND USE THEREOF
申请人:THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO
公开号:US20160326202A1
公开(公告)日:2016-11-10
The application describes catalytic materials for hydrogenation or asymmetric hydrogenation. In particular, the application describes iron(ll) complexes containing tridentate diphosphine PNP ligands useful for catalytic hydrogenation.
Solvent influence on trifluoromethylation reactions with Cd(CF3)2: one-pot synthesis of trifluoromethyl iron complexes
作者:Wolfgang Dukat、Dieter Naumann
DOI:10.1039/dt9890000739
日期:——
ligand-exchange reaction is observed, yielding trifluoromethyl iron acetonitrile complexes, while carbonyl complexes are obtained in ethers. The compound [Fe(CO)4(CF3)2] has been prepared in 65% yield, and its 19F n.m.r., i.r., Raman, mass, and Mössbauer spectra recorded. The advantage of observing the 13C satellites in the 19F n.m.r. spectra for the analysis of trifluoromethyl metal compounds is established. If
双(三氟甲基)镉络合物Cd(CF 3)2 ·L(L = 2CH 3 CN或CH 3 OCH 2 CH 2 OCH 3)作为全氟烷基格氏试剂与羰基铁卤化物反应,进行一锅法反应,生成Fe– CF 3化合物容易。观察到强烈的溶剂影响。讨论了反应方向的依赖性,即三氟甲基化或氟化。在CH 3 CN存在下,观察到配体交换反应,产生三氟甲基铁乙腈络合物,而在醚中获得羰基络合物。化合物[Fe(CO)4(CF 3)2 ]的制备产率为65%,并记录了其19 F nmr,ir,Raman,质量和Mössbauer光谱。建立了在19 F nmr光谱中观察13 C卫星以分析三氟甲基金属化合物的优势。如果使用适当的反应条件,则Cd(CF 3) 2络合物作为氟化试剂和CF 2源反应。因此,在三氟甲基镉试剂与四羰基卤化铁在CH 3 CN中反应时,形成了反磁性的氟铁乙腈络合物。
Structure of Bromotrinitrosyl Iron, [Fe(NO)3Br], and DFT Calculations of the Structures of [Fe(NO)3X] (X = Cl, Br, I)
作者:Wolfgang Beck、Thomas M. Klapötke、Peter Mayer
DOI:10.1002/zaac.200500415
日期:2006.2
Bromotrinitrosyliron was prepared by passing a stream of nitrogen monoxide over a mixture of iron dibromide and iron powder at elevated temperatures. It readily loses NO to give [(ON)2Fe(μ-Br)Fe(CO)2]. The structure of freshly obtained [Fe(NO)3Br] was determined by X-ray diffraction at 200 K and shows (distorted) tetrahedral coordination with N–Fe–N and N–Fe–Br angles of 107.9(2)° and 111.0(2)° and