1,2,3-Triazoles were synthesized in water using a cheaper, simple and easily recyclable heterogeneous porous Cu catalyst via one-pot multi component reaction. The catalyst can be recycled five times without significant loss of its catalytic activity.
Bifunctional Solid Catalyst for Organic Reactions in Water: Simultaneous Anchoring of Acetylacetone Ligands and Amphiphilic Ionic Liquid “Tags” by Using a Dihydropyran Linker
作者:Bingbing Lai、Fuming Mei、Yanlong Gu
DOI:10.1002/asia.201800567
日期:2018.9.4
bifunctional silica‐based solid catalyst that possessed an ionicliquid tail and a metal acetylacetonate moiety was prepared through a mild Lewis‐acid‐catalyzed ring‐opening reaction with a thiol‐functionalized silica. The surfactant‐combined silica‐supported metal acetylacetone catalysts displayed excellent catalytic activity in water for a range of reactions. The solid catalyst was also shown to be recyclable
Silica-supported metal acetylacetonate catalysts with a robust and flexible linker constructed by using 2-butoxy-3,4-dihydropyrans as dual anchoring reagents and ligand donors
2-Butoxy-3,4-dihydropyrans were used, for the first time, as dual anchoring reagents and ligand donors to prepare the immobilize homogeneous metal acetylacetonate catalysts.
2-丁氧基-3,4-二氢吡喃首次被用作双锚定试剂和配体供体,制备固定化均相金属乙酰丙酮酸酯催化剂。
Synthesis of heterogeneous Ru(<scp>ii</scp>)-1,2,3-triazole catalyst supported over SBA-15: application to the hydrogen transfer reaction and unusual highly selective 1,4-disubstituted triazole formation <i>via</i> multicomponent click reaction
作者:Priti Sharma、Jayant Rathod、A. P. Singh、Pradeep Kumar、Yoel Sasson
DOI:10.1039/c7cy02619f
日期:——
catalyst was screened for the multicomponent click cycloaddition reaction in water medium as a green solvent and it exhibited unusual and excellent selectivity for the formation of 1,4-disubstituted triazole product under mild reaction condition. In addition, SBA-15-Tz-Ru(II)TPP catalyst also catalyzed the hydrogen transfer reaction of various carbonyl compounds with excellent catalytic activity to
在本研究中,我们展示了一种简单有效的配体形成方法,并通过点击反应将共价锚定到异质支持物上。锚固在SBA-15的点击修饰配体上的三氯化三(三苯基膦)钌(II)络合物[RuCl 2(PPh 3)3 ]形成了一种新型的高效多相SBA-15-Tz-Ru(II)TPP催化剂。固态13 C,29 Si和31 P CP-MAS NMR光谱为形成非均相催化剂提供了证据。SBA-15-Tz-Ru(II)TPP催化剂在水介质中作为绿色溶剂进行了多组分点击环加成反应的筛选,在温和的反应条件下,它对形成1,4-二取代的三唑产物表现出不同寻常的优异选择性。此外,SBA-15-Tz-Ru(II)TPP催化剂还催化了各种具有优异催化活性的羰基化合物的氢转移反应,得到了相应的醇。非均相催化剂可以循环使用多次(五次)而不会损失反应性。
Functionalized hypercrosslinked polymers with knitted N-heterocyclic carbene–copper complexes as efficient and recyclable catalysts for organic transformations
it was used as a solid catalyst for some organic transformations. An oxidative condensation reaction of indoles, 1,3-dicarbonyl compounds and phenylglyoxal monohydrate was developed with the aid of the HCP–NHC–Cu catalyst, which produced various polysubstituted olefins in high yield. The three-component click reaction of NaN3, phenylacetylene and benzylhalide, the Ullmann C–N coupling and the Glaser