Carbene insertion reactions for the construction of C C and C − heteroatom bonds using surface modified Silica microspheres as catalysts
作者:Yang Yu、Junyu Wang、Zhiqin He、Yiming Sun、Jonathan B. Baell、Zhifeng Mao、Fei Huang
DOI:10.1016/j.jcat.2023.04.023
日期:2023.8
method. The surface modified SMs catalyzed X − H (X = C, O, N, S) and C C bonds insertion reactions from various diazo compounds with acyclic and cyclic 1,3-dicarbonyl compounds, arylamines and thiophenols were reported, giving the corresponding products in moderate to excellent yields. The modified species played the key role in the reactions and were identified as the catalytic active species. HRTEM
二氧化硅微球(SMs)具有无毒、化学稳定性高等特点,在传感器、感光乳剂和医药等领域有着广泛的应用。然而,在有机化学和医药化学领域,SMs作为催化剂用于合成精细化学品的报道较少。在这项工作中,通过原硅酸乙酯(TEOS)在碱性体系中的水解和缩聚反应高效合成了SMs,并通过浸渍法成功制备了表面改性的SMs催化剂。表面改性 SM 催化 X − H(X = C、O、N、S)和 C 报道了各种重氮化合物与无环和环状 1,3-二羰基化合物、芳基胺和苯硫酚的 C 键插入反应,以中等至优异的收率得到相应的产物。改性物种在反应中起关键作用,被确定为催化活性物种。HRTEM 和 XRD 显示改性物质高度分散在改性 SMs 表面。