Synthesis of cyclic carbonates using monometallic, and helical bimetallic, aluminium complexes

Jose A. Castro-Osma; Agustin Lara-Sanchez; Michael North

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Synthesis of cyclic carbonates using monometallic, and helical bimetallic, aluminium complexes

机译：使用单金属和螺旋双金属，铝制复合物合成环状碳酸盐

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The aluminium complexes of a series of bis(pyrazol-1-yl)methane derived ligands were investigated as catalysts for the synthesis of cyclic carbonates from carbon dioxide and epoxides. A bimetallic, helical, heteroscorpionate complex displayed significantly higher catalytic activity than the corresponding monometallic complexes. The optimal reaction conditions were found to involve the use of 5 mol% of the bimetallic complex and 5 mol% of tetrabutylammonium bromide under solvent free conditions in the presence of 10 bar of wet carbon dioxide. Under these conditions, eleven monosubstituted epoxides were converted into the corresponding cyclic carbonates in 51-91% yield. A kinetic study showed that the reactions were first order in epoxide, catalyst and tetrabutylammonium bromide and allowed a catalytic cycle to be proposed.

机译：研究了一系列Bis（吡唑-1-基）甲烷衍生配体的铝复合物作为催化剂，用于合成二氧化碳和环氧化物的环状碳酸盐。双金属，螺旋，杂体配合物的催化活性明显高于相应的单金属复合物。发现最佳反应条件涉及在溶剂的自由条件下使用5 mol％的双金属复合物和5 mol％的四丁酰胺溴铵的使用。在这些条件下，将11个单取代的环氧化物以51-91％的产率转化为相应的环状碳酸盐。一项动力学研究表明，这些反应是环氧，催化剂和四丁基铵的一阶，并允许提出催化循环。

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来源
《Catalysis science & technology》 |2012年第5期|1021-1026|共6页
作者
Jose A. Castro-Osma; Agustin Lara-Sanchez; Michael North;
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作者单位

School of Chemistry and University Research Centre in Catalysisand Intensified Processing, Bedson Building, University of Newcastle,Newcastle upon Tyne, UK NE1 7RU;

Departamento de Quimica Inorgdnica, Orgdnica y Bioquimica,Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain;

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原文格式 PDF
正文语种英语
中图分类汉语教学;
关键词
Carbonates; ALUMINIUM COMPLEXES; HelicalaluminiumCarbon DioxidetetrabutylammoniumEpoxy CompoundsSOLVENT-FREECatalystssynthesis;

机译：Carbonates;ALUMINIUM COMPLEXES;HelicalaluminiumCarbon DioxidetetrabutylammoniumEpoxy CompoundsSOLVENT-FREECatalystssynthesis;

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1. Synthesis of cyclic carbonates from epoxides or olefins and C02 catalyzed by metal-organic frameworks and quaternary ammonium salts [J] . Olga V. Zalomaeva, Nataliya V. Maksimchu~, Andrey M. Chibiryaev, 能源化学：英文版 . 2013,第001期
2. Nonressonant nonlinear optical switching behavior of Ag monometallic and Ag@Au bimetallic investigated by femtosecond Z-Scan measurements [J] . Mariano Sara D. G., Saraiva Naythalla A. M., Costa Jean C. S., Optics & Laser Technology . 2021,第1期

机译：Femtosecond Z扫描测量研究AG Monometallic和Ag @ Au Bimetallic的突出非线性光学切换行为
3. Synthesis of dinucleating ligands and bimetallic complexes. [O] . 1994

机译：synthesis of dinucleating ligands and bimetallic complexes.

Synthesis of cyclic carbonates using monometallic, and helical bimetallic, aluminium complexes

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