12098-17-8Relevant articles and documents
Sollott, G. P.,Mertwoy, H. E.,Portnoy, S.,Snead, J. L.
, p. 1090 - 1092 (1963)
Synergistic effects in ambiphilic phosphino-borane catalysts for the hydroboration of CO2
Tlili, Anis,Voituriez, Arnaud,Marinetti, Angela,Thuéry, Pierre,Cantat, Thibault
, p. 7553 - 7555 (2016)
The benefit of combining both a Lewis acid and a Lewis base in a catalytic system has been established for the hydroboration of CO2, using ferrocene-based phosphine, borane and phosphino-borane derivatives.
Synthesis and characterisation of palladium(ii) complexes with hybrid phosphinoferrocene ligands bearing additional O-donor substituents
Vosáhlo, Petr,Schulz, Ji?í,?koch, Karel,Císa?ová, Ivana,?těpni?ka, Petr
supporting information, p. 4463 - 4470 (2019/03/19)
While 1,1′-bis(diphenylphosphino)ferrocene (dppf) is widely used as a ligand in coordination chemistry and catalysis, its congeners with oxygen-containing functional groups have long been overlooked. Accordingly, we studied the coordination behaviour in Pd(ii) complexes of three phosphinoferrocene ligands bearing secondary O-donor groups, Ph2PfcR, wherein R = CHO (1), Ac (2) and CMe2(OH) (3), and fc = ferrocene-1,1′-diyl. Depending on the stoichiometry, reactions of 1-3 (L) with [PdCl2(cod)] (cod = η2:η2-cycloocta-1,5-diene) produced the respective mono- and dipalladium complexes, trans-[PdCl2(L-κP)2] and trans-[PdCl(μ-Cl)(L-κP)]2. Compound [PdCl(μ-Cl)(3-κP)]2 was found to dehydrate readily, giving rise to [PdCl(μ-Cl)(Ph2PfcC(Me)═CH2-κP)]2. Furthermore, ligands 1-3 cleaved [(LNC)Pd(μ-Cl)]2 (LNC = 2-((dimethylamino-κN)methyl)phenyl-κC1), yielding [(LNC)PdCl(L-κP)], which were converted into the cationic complexes [(LNC)PdCl(L)]X (L/X = 1/PF6, 2/SbF6, 3/PF6). Compounds with ligands 1 and 2 were structurally authenticated as stable bis-chelate complexes. In contrast, the product featuring ligand 3 was rather unstable and converted into [(LNC)Pd(AcOEt-κO)(3-κP)][PF6] upon recrystallisation. Weak oxygen coordination was confirmed via reactions of [(LNC)PdCl(L)]X with (PhCH2NEt3)Cl in which the parent chloride complexes were regenerated, and this was further corroborated by DFT computations. Our findings, pointing to hemilabile coordination of 1-3, are relevant for catalysis because de-coordination of the weaker binding O-donor moiety may open a vacant site for a substrate, thereby enhancing the catalytic properties of metal complexes with ligands of this type.
Synthesis method of Josiphos chiral ferrocenyl phosphine ligands
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Paragraph 0007; 0055; 0056, (2017/05/27)
The invention discloses a synthesis method of Josiphos chiral ferrocenyl phosphine ligands, and belongs to the field of organic synthesis. The method is realized through the following steps of using ferrocene as a starting raw material; using aluminum chloride as a catalyst; taking a reaction with phosphonic chloride compound R2PCl; then, taking a reaction with vinyl diaryl phosphine under the catalysis effect of ferric trichloride and D-proline to obtain the Josiphos chiral ferrocenyl phosphine ligands. Compared with the prior art, the synthesis method has the advantages that the steps are few; the operation is simple; the production cost is reduced; the synthesis method is suitable for industrial production. The prepared Josiphos chiral ferrocenyl phosphine ligands can be used as ligands of metal catalysts for catalyzing an unsymmetrical organic reaction; the synthesis method is applied to the fields of medicine synthesis and the like.
