565-75-3Relevant articles and documents
Preparation method and application of polysubstituted ethyl alkane
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Paragraph 0038-0041; 0043-0048; 0050-0055; 0057-0058, (2021/10/05)
The preparation method comprises the following steps: in an inert atmosphere, adding a raw material alcohol to a reaction kettle, then adding a solvent, a dehydration catalyst and a stabilizer to carry out reaction, carrying out rectification after reaction, and dividing the distillate to obtain olefin. The olefin is added to the hydrogenation kettle, and then water and a hydrogenation catalyst are added to replace the nitrogen to be hydrogenated and hydrogenated, and after the hydrogenation is finished, the catalyst is removed by filtration. The polysubstituted ethane alkane prepared by the invention does not generate waste in the production process, and all materials other than the main materials in the production process can be used for multiple times. The added water can greatly reduce the generation of static electricity in the production process, so that the product production safety is greatly improved. The yield of the polysubstituted ethane alkane is higher than 98%, and the purity is greater than 99.8%.
Alkene Hydrogenations by Soluble Iron Nanocluster Catalysts
Gieshoff, Tim N.,Chakraborty, Uttam,Villa, Matteo,Jacobi von Wangelin, Axel
supporting information, p. 3585 - 3589 (2017/03/21)
The replacement of noble metal technologies and the realization of new reactivities with earth-abundant metals is at the heart of sustainable synthesis. Alkene hydrogenations have so far been most effectively performed by noble metal catalysts. This study reports an iron-catalyzed hydrogenation protocol for tri- and tetra-substituted alkenes of unprecedented activity and scope under mild conditions (1–4 bar H2, 20 °C). Instructive snapshots at the interface of homogeneous and heterogeneous iron catalysis were recorded by the isolation of novel Fe nanocluster architectures that act as catalyst reservoirs and soluble seeds of particle growth.
Single-Site Cobalt Catalysts at New Zr8(μ2-O)8(μ2-OH)4 Metal-Organic Framework Nodes for Highly Active Hydrogenation of Alkenes, Imines, Carbonyls, and Heterocycles
Ji, Pengfei,Manna, Kuntal,Lin, Zekai,Urban, Ania,Greene, Francis X.,Lan, Guangxu,Lin, Wenbin
supporting information, p. 12234 - 12242 (2016/09/28)
We report here the synthesis of robust and porous metal-organic frameworks (MOFs), M-MTBC (M = Zr or Hf), constructed from the tetrahedral linker methane-tetrakis(p-biphenylcarboxylate) (MTBC) and two types of secondary building units (SBUs): cubic M8(μ2-O)8(μ2-OH)4 and octahedral M6(μ3-O)4(μ3-OH)4. While the M6-SBU is isostructural with the 12-connected octahedral SBUs of UiO-type MOFs, the M8-SBU is composed of eight MIV ions in a cubic fashion linked by eight μ2-oxo and four μ2-OH groups. The metalation of Zr-MTBC SBUs with CoCl2, followed by treatment with NaBEt3H, afforded highly active and reusable solid Zr-MTBC-CoH catalysts for the hydrogenation of alkenes, imines, carbonyls, and heterocycles. Zr-MTBC-CoH was impressively tolerant of a range of functional groups and displayed high activity in the hydrogenation of tri- and tetra-substituted alkenes with TON > 8000 for the hydrogenation of 2,3-dimethyl-2-butene. Our structural and spectroscopic studies show that site isolation of and open environments around the cobalt-hydride catalytic species at Zr8-SBUs are responsible for high catalytic activity in the hydrogenation of a wide range of challenging substrates. MOFs thus provide a novel platform for discovering and studying new single-site base-metal solid catalysts with enormous potential for sustainable chemical synthesis.
