Ligand-free Cu(<scp>ii</scp>)-catalyzed aerobic etherification of aryl halides with silanes: an experimental and theoretical approach
作者:Muhammad Naeem Ahmed、Khalil Ahmad、Khawaja Ansar Yasin、Tayyaba Farooq、Bilal Ahmad Khan、Soumendra K. Roy
DOI:10.1039/c9nj01777a
日期:——
remained a focus of interest. In contrast to the conventional/traditional methods of etherification, herein, we have reported a more efficient method, which is better yielding and more general in application. The etherification of aryl halides by alkoxy/phenoxy silanes was catalyzed by copper acetate in the presence of cesium carbonate and oxygen in DMF at 145 °C. All the as-synthesized compounds were
由于它们在自然界中的广泛应用和在各个领域的广泛应用,芳基烷基醚的合成一直是人们关注的焦点。与传统的/传统的醚化方法相比,本文报道了一种更有效的方法,该方法收率更高,应用更普遍。在碳酸铯和氧气存在下于145°C下,乙酸铜在乙酸铜的催化下,通过烷氧基/苯氧基硅烷将芳基卤化物醚化。所有所合成的化合物进行表征通过所述1 H-NMR和13C-NMR光谱技术。进行了使用B3LYP官能团的密度泛函理论计算,以阐明反应机理。2-硝基碘代苯和四甲氧基硅烷之间的C-O偶联反应被用作模型反应。用于产生催化物质(31.6 kcal mol -1)和σ键易位(16.0 kcal mol -1),氧化加成/还原消除(20.3 kcal mol -1),卤素原子转移(19.2 kcal)的活化能垒mol -1)和单电子转移(SET)(29.5 kcal mol -1)计算了C–O偶联反应的机理。使用B3PW91,PBE