AgNPs encapsulated by an amine-functionalized polymer nanocatalyst for CO<sub>2</sub>fixation as a carboxylic acid and the oxidation of cyclohexane under ambient conditions
dispersed in the polymeric matrix, with dimensions of around 4–9 nm. This nanocatalyst showed activity, particularly for the green synthesis of valuable carboxylic acids by the carboxylation reaction of terminalalkynes with carbondioxide under atmospheric pressure. Additionally, the catalyst displayed efficient catalytic activity for the oxidation of cyclohexane using hydrogen peroxide as the oxidising agent
Carboxylation of terminal alkynes with CO<sub>2</sub> catalyzed by bis(amidate) rare-earth metal amides
作者:Hao Cheng、Bei Zhao、Yingming Yao、Chengrong Lu
DOI:10.1039/c4gc02200a
日期:——
Three novel bis(amidate) rare-earth metal amides were prepared and characterized. Treatment of CO2 with terminal alkynes obtained propiolic acids in high to excellent yields using the highest reactive Nd-based catalyst at ambient pressure.
The direct carboxylation of terminal alkynes with carbon dioxide
作者:Yu Dingyi、Zhang Yugen
DOI:10.1039/c0gc00819b
日期:——
A simple and straight-forward method has been developed for direct carboxylation of terminal alkynes using CO2 as the C1 carbon feedstock. The direct C–H bond functionalization is achieved with Cs2CO3 as the base and in the absence of transition metal catalyst. Various propiolic acids were synthesized in good to excellent yields with a wide substrate scope and a good functional groups tolerance. This
已经开发出一种简单直接的方法来直接 羧化 终端的 炔烃使用CO 2作为C1碳原料。在不使用过渡金属催化剂的情况下,以Cs 2 CO 3为碱,可实现直接的C–H键官能化。合成了各种丙酸,具有良好的收率和优异的收率,具有广泛的底物范围和良好的官能团耐受性。这是一个更加原子化和阶梯式的协议,在实际应用中具有巨大的潜力。
Carboxylation of terminal alkynes with CO<sub>2</sub>using novel silver N-heterocyclic carbene complexes
Fournovel N-heterocyclic carbene (NHC) silvercomplexes, I–IV, have been synthesized and characterized. The single X-ray crystal diffraction data indicate a dinuclear solid-state structure for I and III and a mononuclear structure for II and IV. These complexes have been successfully used as efficient catalysts for the C–H activating carboxylation of terminal alkynes with CO2. A wide range of substrates