Fe/ppm Cu nanoparticles as a recyclable catalyst for click reactions in water at room temperature
作者:Aurélien Adenot、Evan B. Landstrom、Fabrice Gallou、Bruce H. Lipshutz
DOI:10.1039/c7gc00883j
日期:——
New iron-based nanoparticles doped with ppm levels of CuOAc are capable of catalyzing cycloadditions between alkynes and azides to afford triazole-containing products. These reactions take place in water at ambient temperatures, enabled by the presence of nanomicelles that function as a delivery mechanism. The NPs can be easily recycled within the same reaction vessel. Low levels of residual copper
[EN] COMPOUNDS AND METHODS FOR CONJUGATION OF BIOMOLECULES<br/>[FR] COMPOSÉS ET PROCÉDÉS DE CONJUGAISON DE BIOMOLÉCULES
申请人:LIFE TECHNOLOGIES CORP
公开号:WO2012121973A1
公开(公告)日:2012-09-13
Low-copper click chemistry, 1.3-dipolar cycloadditions, and Staudinger ligations for modifying biomolecules is provided. Compositions, methods, and kits relating to low-copper click chemistry, 1.3-dipolar cycloadditions, and Staudinger ligations are also provided.
The disclosure provides compounds of formula I and methods for preparation thereof. The compounds act as inhibitor of histone deacetylase.
该披露提供了I式化合物及其制备方法。这些化合物作为组蛋白去乙酰化酶的抑制剂。
Tailor‐Made Polydiacetylene Micelles for the Catalysis of 1,3‐Dipolar Cycloadditions in Water
作者:Ramar Arun Kumar、Dhanaji V. Jawale、Emmanuel Oheix、Valérie Geertsen、Edmond Gravel、Eric Doris
DOI:10.1002/adsc.202000795
日期:2020.10.21
was developed by complexation of copper chloride in polydiacetylene micelles. The latter were designed to accommodate and stabilize copper salts, by providing a suitable ligand environment. Micelles were valorized as nanoreactors for the promotion of the Huisgen cycloaddition reaction in water thanks to their central hydrophobic core which permitted not only aqueous dispersion, but also concentration
Mechanistic study in azide-alkyne cycloaddition (CuAAC) catalyzed by bifunctional trinuclear copper(I) pyrazolate complex: Shift in rate-determining step
作者:Vladimir A. Larionov、Anna R. Stashneva、Aleksei A. Titov、Alexey A. Lisov、Michael G. Medvedev、Alexander F. Smol'yakov、Andrey M. Tsedilin、Elena S. Shubina、Victor I. Maleev
DOI:10.1016/j.jcat.2020.07.010
日期:2020.10
Trinuclear copper(I) pyrazolate [Cu(3,5-(CF3)2Pz)]3 was employed in a mechanistic study of azide-alkyne cycloaddition (CuAAC). It was shown that the copper complex operates as a bifunctional catalytic system (copper source and Brønsted base) under mild conditions (RT and air atmosphere) at lowcatalystloading (1 mol%). The rate-determining step of the reaction is the first C-N bond formation between
三核吡唑酸铜(I)[Cu(3,5-(CF 3)2 Pz)] 3被用于叠氮化物-炔烃环加成(CuAAC)的机理研究中。结果表明,铜的络合物在温和的条件下(RT和空气气氛下)以较低的催化剂负载量(1摩尔%)作为双功能催化体系(铜源和布朗斯台德碱)运行。该反应的决定速率的步骤是叠氮化物和乙炔之间的第一个CN键形成(叠氮化物迁移插入),而不是通常认为的乙炔铜(I)形成。观测到的动力学同位素效应等于1.1并通过DFT计算得到了支持。该反应对催化剂浓度具有二级依赖性,这意味着两个铜(I)中心参与了“双蝴蝶”四核配合物Cu 4 L 4(RC≡CH)2形成金属环的步骤在速率确定步骤中。DFT计算证明吡唑酸酯配体充当布朗斯台德碱,使乙炔分子去质子化,提供了成功的催化作用。基于DFT计算已经构建了合理的反应催化循环。