Superparamagnetic CuCl nanoparticles were prepared and identified as an effective heterogeneous catalyst for the tandem transformation of methylarenes and 1,3‐dicarbonyl compounds into the corresponding enole esters by the use of tert‐butyl hydroperoxide as an external oxidant. The catalyst can be removed from the reaction medium simply by use of an external magnet. As a consequence, various derivatives
Toluene oxidation is one of the substantial industrial technologies since oxidized products are industrially very important intermediates. A Fe3O4@cysteine@Cu‐catalysed reaction that uses tert‐butyl hydroperoxide as oxidant to produce esters from toluene and β‐diketones or β‐keto esters, enolate precursors, has been developed. Oxidativeesterification of toluene with 1,3‐dicarbonyl derivatives led
甲苯氧化是重要的工业技术之一,因为氧化产物是工业上非常重要的中间体。已经开发出一种Fe 3 O 4 @胱氨酸@Cu催化的反应,该反应使用叔丁基氢过氧化物作为氧化剂,由甲苯和β-二酮或β-酮酸酯(烯醇盐前体)生成酯。甲苯与1,3-二羰基衍生物的氧化酯化反应导致C-O键形成和直接的CH-H功能化。
Construction of Heterobimetallic Catalytic Scaffold with a Carbene-Bipyridine Ligand: Gold–Zinc Two-Metal Catalysis for Intermolecular Addition of <i>O</i>-Nucleophiles to Nonactivated Alkynes
A gold(I) complex bearing an imidazo[1,5-a]pyridin-3-ylidene ligand with a 2,2′-bipyridine moiety at the C5 position was prepared as a template for constructing heterobimetallic cooperative catalysts. In situ generated gold–zinc bimetallic systems enabled intermolecular nucleophilic anti-addition of O-nucleophiles such as carboxylic acids and phenols toward nonactivated internal alkynes. DFT calculations
制备了在 C5 位具有 2,2'-联吡啶部分的咪唑并[1,5 - a ]吡啶-3-亚基配体的金 (I) 配合物作为构建异质双金属协同催化剂的模板。原位生成的金-锌双金属体系使O亲核试剂(如羧酸和酚类)向未活化的内部炔烃发生分子间亲核反加成。DFT 计算支持提出的阳离子金原子和锌盐位点分别用于活化炔烃和羧酸的协同作用。
Bernhard, Justus Liebigs Annalen der Chemie, 1894, vol. 282, p. 185,187
作者:Bernhard
DOI:——
日期:——
Benzoylation of Ethyl Benzoylacetate in the Presence of Various Tertiary Amines<sup>1</sup>