925-54-2Relevant articles and documents
Methyl-modified cage-type phosphorus ligand and preparation method thereof Preparation method and application thereof
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Paragraph 0075-0084; 0087-0088, (2021/09/15)
The invention discloses a methyl-modified cage-type phosphorus ligand, a preparation method and application thereof, in particular to a synthesis design, wherein methyl is further introduced on a phenyl ring of triphenylphosphine, and a methyl-modified cage-type phosphorus ligand is synthesized, and when a methyl meta-substituted cage-type phosphorus ligand is used as a hydroformylation reaction catalyst the proportion of n-structural aldehyde and isomeric aldehyde is 2.6. TOF-1 The methyl-substituted cage-type phosphorus ligand is excellent in performance, stable in property and recyclable, has excellent substrate applicability in the hydroformylation catalytic reaction, has a good industrial application prospect, and has very important significance in metal organic catalysis.
Intermetallic Nanocatalyst for Highly Active Heterogeneous Hydroformylation
Chen, Minda,Gupta, Geet,Ordonez, Claudio W.,Lamkins, Andrew R.,Ward, Charles J.,Abolafia, Celia A.,Zhang, Biying,Roling, Luke T.,Huang, Wenyu
supporting information, p. 20907 - 20915 (2021/12/14)
Hydroformylation is an imperative chemical process traditionally catalyzed by homogeneous catalysts. Designing a heterogeneous catalyst with high activity and selectivity in hydroformylation is challenging but essential to allow the convenient separation and recycling of precious catalysts. Here, we report the development of an outstanding catalyst for efficient heterogeneous hydroformylation, RhZn intermetallic nanoparticles. In the hydroformylation of styrene, it shows three times higher turnover frequency (3090 h-1) compared to the benchmark homogeneous Wilkinson's catalyst (966 h-1), as well as a high chemoselectivity toward aldehyde products. RhZn is active for a variety of olefin substrates and can be recycled without a significant loss of activity. Density functional theory calculations show that the RhZn surfaces reduce the binding strength of reaction intermediates and have lower hydroformylation activation energy barriers compared to pure Rh(111), leading to more favorable reaction energetics on RhZn. The calculations also predict potential catalyst design strategies to achieve high regioselectivity.
The invention relates to a bidentate phosphine ligand and a preparation method thereof. Application
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Paragraph 0054-0061, (2021/11/03)
The invention discloses a bidentate phosphine ligand and a preparation method and application thereof, and a ligand skeleton adopted by the bidentate phosphine ligand not only has C. 2 The phosphine ligand derived from the skeleton can provide effective steric hindrance around the catalyst center metal, so that selectivity of the catalyst can be remarkably improved, and furthermore, the phosphine ligand skeleton is simple in synthesis route, easy to obtain in large quantities, capable of effectively improving production efficiency and reducing industrial production cost.