- Synthesis of the tertiaryphosphine derivatives of iron carbonyl phosphines: preparation of tetracarbonyliron(0), pentacarbonylbisdiiron(0), tetracarbonyliron(0) and pentacarbonylbis<...
-
Pentacarbonyl iron reacts with this(2-furyl)phosphine (or tris(2-benzofuryl)phosphine) in the presence of sodium borohydride in refluxing n-butanol to give the title compounds.The crystal and molecular structure of pentacarbonylbis(μ-bis(2-furyl)phosphido>diiron(0) were determined by X-ray crystallography. Keywords: Iron; Dinuclear; Carbonyls; X-ray structure; Benzoferrylphosphine complex
- Santelli-Rouvier, Christiane,Coin, Christine,Toupet, Loic,Santelli, Maurice
-
-
Read Online
- A Lewis Base Nucleofugality Parameter, NFB, and Its Application in an Analysis of MIDA-Boronate Hydrolysis Kinetics
-
The kinetics of quinuclidine displacement of BH3 from a wide range of Lewis base borane adducts have been measured. Parameterization of these rates has enabled the development of a nucleofugality scale (NFB), shown to quantify and predict the leaving group ability of a range of other Lewis bases. Additivity observed across a number of series R′3-nRnX (X = P, N; R′ = aryl, alkyl) has allowed the formulation of related substituent parameters (nfPB, nfAB), providing a means of calculating NFB values for a range of Lewis bases that extends far beyond those experimentally derived. The utility of the nucleofugality parameter is explored by the correlation of the substituent parameter nfPB with the hydrolyses rates of a series of alkyl and aryl MIDA boronates under neutral conditions. This has allowed the identification of MIDA boronates with heteroatoms proximal to the reacting center, showing unusual kinetic lability or stability to hydrolysis.
- Taylor, Nicholas P.,Gonzalez, Jorge A.,Nichol, Gary S.,García-Domínguez, Andrés,Leach, Andrew G.,Lloyd-Jones, Guy C.
-
supporting information
p. 721 - 729
(2022/01/04)
-
- The Trityl-Cation Mediated Phosphine Oxides Reduction
-
Reduction of phosphine oxides into the corresponding phosphines using PhSiH3 as a reducing agent and Ph3C+[B(C6F5)4]? as an initiator is described. The process is highly efficient, reducing a broad range of secondary and tertiary alkyl and arylphosphines, bearing various functional groups in generally good yields. The reaction is believed to proceed through the generation of a silyl cation, which reaction with the phosphine oxide provides a phosphonium salt, further reduced by the silane to afford the desired phosphine along with siloxanes. (Figure presented.).
- Landais, Yannick,Laye, Claire,Lusseau, Jonathan,Robert, Frédéric
-
supporting information
p. 3035 - 3043
(2021/05/10)
-
- PROCESS FOR PRODUCTION OF PHOSPHINE DERIVATIVE FROM PHOSPHINE OXIDE DERIVATIVE
-
Disclosed is a process for producing a phosphine derivative from a phosphine oxide derivative, which comprises the following steps: (I) mixing a phosphine oxide derivative represented by formula (1) with a chlorinating agent in a polar organic solvent to cause the reaction between these components; and (II-1) adding a salt of a metal having an ionization tendency equal to or lower than that of aluminum to the reaction mixture and carrying out the reductive reaction in the presence of aluminum or (II-2) subjecting the reaction mixture to electrolytic reduction, thereby producing a phosphine derivative represented by formula (2). ArnR3-nP═O (1) ArnR3-nP (2) In formulae (1) and (2), Ar represents an aryl group such as a phenyl group, a phenyl group having a substituent, a heteroaromatic ring group, and a heteroaromatic ring group having a substituent; R represents an aliphatic hydrocarbon group or an aliphatic hydrocarbon group having a substituent; and n represents an integer of 0 to 3.
- -
-
Page/Page column 10
(2011/04/18)
-
- Catalyst-free alcoholysis of phosphane-boranes: a smooth, cheap, and efficient deprotection procedure
-
Catalyst-free alcoholytic deprotection of borane-protected phosphorus compounds offers a smooth, efficient, and clean alternative to existing deprotection methods. In this paper we report our results on the general applicability of deprotecting phosphane-
- Van Overschelde, Michel,Vervecken, Elias,Modha, Sachin G.,Cogen, Simon,Van der Eycken, Erik,Van der Eycken, Johan
-
experimental part
p. 6410 - 6415
(2009/12/09)
-
- Triethylborane-mediated hydrogallation and hydroindation: Novel access to organogalliums and organoindiums
-
Hydrogallation of carbon-carbon multiple bonds proceeds in the presence of triethylborane as a radical initiator. Several functionalities do not interfere with this reaction. Resulting alkenyl- and alkylgallium species can be trapped by several electrophiles. Highly regioselective radical addition of an indium hydride reagent to alkynes is also achieved. Various functionalities are tolerant under the reaction conditions. The reaction proceeds with complete anti stereoselectivity. Alkenylindiums obtained via hydroindation can be employed for the following cross-coupling reaction with aryl halides in one pot.
- Takami, Kazuaki,Mikami, Satoshi,Yorimitsu, Hideki,Shinokubo, Hiroshi,Oshima, Koichiro
-
p. 6627 - 6631
(2007/10/03)
-
- A single-strand helical motif induced by self-assembly of [Ag(TFP)]+ moieties with nitrate anions - 31P NMR spectroscopic and X-ray crystal structure characterization of the complexes involved in equilibrium reactions of silver salts and TFP ligand
-
The ability of the ligand tris(2-furyl)phosphane (TFP) to coordinate AgI ions has been investigated. The molar ratio and the nature of the counterions used (NO3-; BF4-) affected the reaction. Moreover, equilibrium reactions were observed and the [Ag(TFP)n]+ (n = 1-4) species involved were identified by variable-temperature 31P NMR spectroscopy. The [Ag(TFP)3]BF4 complex turned out to be the more labile species in solution and it disproportionates by means of an SN2 mechanism to yield the complexes [Ag(TFP)2(H2O)]BF4 (3) and [Ag(TFP)4]BF4 (4). Most of the compounds detected in solution were isolated and characterized in the solid state. The molecular structures of the complexes [Ag(TFP)NO3] (1), [Ag(TFP)3NO3] (2), and [Ag(TFP)2(H2O)]BF4 (3) were determined by X-ray crystal structure diffraction confirming the solution characterization data. In these structures the TFP ligand was always only bonded to the metal centre by the phosphorous atom. It is noteworthy to underline that the molecular structure of complex 1 consists of an infinite single-strand helix arising from the ability of the bridging nitrate anions to connect the [Ag(TFP)]+ units. In the structure the nitrate anions are coordinated to the metal centres in unusual modes acting simultaneously as chelating and bridging ligands. Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.
- Bachechi, Fiorella,Burini, Alfredo,Galassi, Rossana,Pietroni, Bianca Rosa,Tesei, Dania
-
p. 2086 - 2093
(2007/10/03)
-
- A Wittig reaction with 2-furyl substituents at the phosphorus atom: Improved (Z) selectivity and isolation of a stable oxaphosphetane intermediate
-
Wittig reactions with ylides bearing one, two or three 2-furyl groups directly bound to the phosphorus atom have been studied. Greatly improved (Z)-alkene selectivities of up to 98:2 could be observed if 2-furyl groups were present. Monitoring of the reactions by NMR spectroscopy revealed only oxaphosphetane intermediates, which became more stable with increasing number of 2-furyl substituents bound to the phosphorus atom. Oxaphosphetane 10d, with three furyl groups, was successfully isolated, and the results of a crystal structure analysis are presented. Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.
- Appel, Marco,Blaurock, Steffen,Berger, Stefan
-
p. 1143 - 1148
(2007/10/03)
-
- PHOSPHORYLATION OF FURAN, 2-METHYLFURAN, AND THIOPHENE WITH PHOSPHORUS TRIBROMIDE
-
In the presence of pyridine phophorus tribromide is a convenient phosphorylating agent for compounds of furan and thiophene series.Preparative methods for the synthesis of phophorylated furan, 2-methylfuran, and thiophene derivatives were developed.
- Tolmachev, A. A.,Ivonin, S. P.,Kharchenko, A. V.,Kozlov, E. S.
-
p. 778 - 782
(2007/10/02)
-
