629-30-1Relevant articles and documents
Hydroformylation reaction ligand, hydroformylation catalyst and diol preparation method
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Paragraph 0079-0080, (2021/06/22)
The invention discloses a hydroformylation reaction ligand, a hydroformylation catalyst and a diol preparation method According to the invention, the structural formula of the hydroformylation reaction ligand is shown in the specification, wherein R1 and R2 are mutually independent one of H, aryl or substituted aryl, thienyl, pyrrolyl, thiazolyl, imidazolyl and pyridyl; the ligand disclosed by the invention is high in catalytic activity and good in metal active center stability, by-products of aldehyde in a conventional hydroformylation reaction can be reduced, and linear diol with a high normal/isomer ratio can be obtained by a one-step method; and the method has the advantages of simple and convenient process, low cost and energy consumption, good production safety, high product quality and the like, and is particularly suitable for large-scale industrial production.
Short and Easily Scalable Synthesis of the Sex Pheromone of the Horse-Chestnut Leaf Miner (Cameraria ohridella) Relying on a Key Ligand- And Additive-Free Iron-Catalyzed Cross-Coupling
Chourreu, Pablo,Gayon, Eric,Guerret, Olivier,Guillonneau, Lo?c,Lefèvre, Guillaume
, p. 1335 - 1340 (2020/08/14)
We describe in this work a short six-step convergent high-scale synthesis of the sex pheromone of the horse-chestnut leaf miner ((8E,10Z)-tetradeca-8,10-dienal). This procedure relies on a key stereoselective iron-catalyzed Kumada cross-coupling, which affords the coupling product in high yield in the absence of additional ligands or additives. DFT calculations moreover suggest that ω-alkoxide groups on iron-ligated chains in transient organoiron(II) intermediates can enhance their stability and hamper their decomposition in off-cycle β-hydride elimination reactions.
Method for preparing 2,3-dimethyl-1-butene by dimerization of propylene
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Paragraph 0026-0065, (2019/07/29)
The invention provides a method for preparing 2,3-dimethyl-1-butene by dimerization of propylene. According to the method, a catalytic system comprises a catalyst, a cocatalyst and a ligand, wherein the ligand is organic phosphorus. The method disclosed by the invention has relatively high selectivity and catalytic activity on 2,3-dimethyl-1-butene. The catalytic system can keep lower reaction temperature and lower reaction pressure (compared with the temperature and pressure of an isomerization process in the prior art), the conditions are mild, the safety coefficient is relatively high, production requirements can be met by general chemical production equipment, and the method is suitable for amplifying production. The catalyst is simple to prepare and is low in cost and good in stability. The catalyst is easier to separate from a reaction system by adopting a metal nickel simple substance for loading, and catalytic active components are not lost easily.