Tethered ansa-bridged titanium complexes immobilized on 3-mercaptopropyl-functionalized silica gel and their application for the hydrosilylation of imines

Gruber-Woelfler H.; Lichtenegger G.J.; Neubauer C.; Polo E.; Khinast J.G.

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Tethered ansa-bridged titanium complexes immobilized on 3-mercaptopropyl-functionalized silica gel and their application for the hydrosilylation of imines

机译：固定在3-巯基丙基官能化硅胶上的束缚ansa桥联钛配合物及其在亚胺的氢化硅烷化中的应用

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Four tethered titanocene complexes were covalently immobilized onto 3-mercaptopropyl-functionalized silica gel. We have investigated the influence of the length of the tether and of the ansa-bridge on the activity in the heterogeneous hydrosilylation of the cyclic imine 2-phenylpyrroline, taken as an illustrative example. Possible metal leaching during the reaction was investigated using ICP/OES, recycling studies and the three-phase test. The novel immobilized catalysts exhibit an activity similar to their homogeneous analogues in the tested hydrosilylation reactions with a TOF of ～20 h ~(-1). Furthermore, our results indicate that metal leaching is negligible under the applied reaction conditions.

机译：将四个束缚的钛茂配合物共价固定在3-巯基丙基官能化的硅胶上。我们已经研究了系链的长度和ansa桥的长度对环状亚胺2-苯基吡咯啉异质氢化硅烷化中活性的影响，以此为例。使用ICP / OES，循环研究和三相试验研究了反应过程中可能的金属浸出。在测试的氢化硅烷化反应中，新型固定化催化剂的活性与它们的均相类似物相似，TOF为〜20 h〜（-1）。此外，我们的结果表明，在所应用的反应条件下，金属浸出可以忽略不计。

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《Dalton transactions: An international journal of inorganic chemistry》 |2012年第41期|共9页
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Gruber-Woelfler H.; Lichtenegger G.J.; Neubauer C.; Polo E.; Khinast J.G.;
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1. Tethered ansa-bridged titanium complexes immobilized on 3-mercaptopropyl-functionalized silica gel and their application for the hydrosilylation of imines [J] . Gruber-Woelfler H., Lichtenegger G.J., Neubauer C., Dalton transactions: An international journal of inorganic chemistry . 2012,第41期

机译：固定在3-巯基丙基官能化硅胶上的束缚ansa桥联钛配合物及其在亚胺的氢化硅烷化中的应用
2. New tethered ansa-bridged zirconium catalysts: Insights into the "self-immobilization" mechanism [J] . Polo E., Losio S., Sacchi M.C., Journal of Polymer Science, Part A. Polymer Chemistry . 2013,第6期

机译：新型束缚的ansa桥接的锆催化剂：“自固定”机理的见解
3. Reduction of Bis [#eta#~5-(#omega#-alkenyl) tetramethylcyclopentadienyl] titanium Dichloides:An Efficient Synthesis of Long-Chain ansa-Bridged Titanocene Dichlorides by Acidolysis of Cyclopentadienyl-Ring-Tethered Titanacyclopentanes [J] . Horacek Michal, Stepnicka Petr, Gyepes Robert, Chemistry: A European journal . 2000,第13期

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4. Silica Gel Support of Bridged Bicyclic Trialkylphosphine SMAP and Its Application to Rh-Catalyzed Hydrosilylation [C] . Go Hamasaka, Atsuko Ochida, Takahiro Miyahara Symposium on Organometallic Chemistry . 2006

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5. I. Progress toward the total synthesis of guanacastepene A. II. Silyloxy-tethered methodology development: New applications in enyne metathesis and hydrosilylation chemistry. [D] . Maifeld, Sarah Virginia. 2006

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6. β-Keto-enol Tethered Pyridine and Thiophene: Synthesis Crystal Structure Determination and Its Organic Immobilization on Silica for Efficient Solid-Liquid Extraction of Heavy Metals [O] . Smaail Radi, Said Tighadouini, Maryse Bacquet, 2016

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7. Peptide-tethered monodentate and chelating histidylidene metal complexes: synthesis and application in catalytic hydrosilylation [O] . Monney, Angèle, Nastri, Flavia, Albrecht, Martin 2013

机译：肽束缚的单齿和螯合的亚吡啶金属配合物：合成及其在催化氢化硅烷化中的应用
8. Complexing and Chelating Agents Immobilized on Silica Gel and Related Materialsand Their Application for Sorption of Inorganic Species [R] . Biernat, J. F., Konieczka, P., Torbet, B. J., 1994

机译：硅胶及相关材料固定化络合螯合剂及其在无机物吸附中的应用

Tethered ansa-bridged titanium complexes immobilized on 3-mercaptopropyl-functionalized silica gel and their application for the hydrosilylation of imines

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