research, nano-SiO2–H3BO3 is introduced as a novel environmentally benign and recyclable heterogeneous catalyst for the synthesis of aminonaphthols under solvent-free conditions without an additional co-catalyst or additive in air. This synthesismethod offers several advantages, such as a green and eco-friendly protocol, operational simplicity, mild reaction conditions, short reaction times, higher yields
摘要 在这项研究中,引入了纳米SiO 2 -H 3 BO 3作为一种新型的环境友好型可循环使用的非均相催化剂,用于在无溶剂条件下合成氨基萘,而无需额外的助催化剂或空气中的添加剂。这种合成方法具有许多优点,例如绿色环保的方法,操作简单,反应条件温和,反应时间短,产率高,后处理程序容易。这些非常干净的反应的后处理仅涉及从乙醇中重结晶产物并通过过滤回收催化剂。催化剂可以重复使用几次而不会失去活性。 图形概要
An efficient, multicomponent synthesis of aminoalkylnaphthols via Betti reaction using ZSM‐5 as a recoverable and reusable catalyst
作者:Rangappa S. Keri、Mahadeo Patil、Srinivasa Budagumpi、Balappa S. Sasidhar
DOI:10.1002/aoc.6316
日期:2021.9
environmentally friendly catalysts to reduce the number of toxic wastes are critical for improving the chemical synthetic protocols. A simple, mild, efficient, and eco-friendly method was developed for the synthesis of a series of Betti bases, 1-(α-aminoalkyl)naphthols, via a one-pot, multi-component reaction from aldehydes, β-naphthol and secondary amines in the presence of H-ZSM-5 as a catalyst at room temperature
Zn(OAc)2•2H2O-Catalyzed Betti Base Synthesis under Solvent-free Conditions
作者:M. Mujahid Alam、Hari B. Bollikolla、Ravi Varala
DOI:10.2174/1570178618666210616155257
日期:2022.1
:Zn(OAc)2•2H2O-catalyzed one-pot multicomponent reaction of Betti bases using β-naphthol, aldehydes, and amines, underneat conditions in moderate to excellent yields (68-96%) is reported in this study. This synthetic protocol offers several advantages, such as operationalsimplicity, shorter reaction period, high yields, and easy work-up procedures.
Synthesis of Betti base derivatives catalyzed by nano-CuO-ionic liquid and experimental and quantum chemical studies on corrosion inhibition performance of them
polarization method was employed to investigate the corrosion inhibitoryeffect of the synthesized aminonaphthols at a concentration of 200 ppm for mild steel acid pickling in 1 M HCl and 0.5 M H2SO4 solutions. The results showed that, even in such strongly corrosive media, all of the synthesized aminonaphthol derivatives exhibit good inhibitory effects toward mild steel corrosion with inhibition efficiencies
在这项研究中,首次引入氨基萘酚衍生物作为有效的腐蚀抑制剂。采用线性极化方法研究了浓度为200 ppm的合成氨基萘对1M HCl和0.5 MH 2 SO 4中低碳钢酸洗的缓蚀作用。解决方案。结果表明,即使在如此强腐蚀性的介质中,所有合成的氨基萘酚衍生物对轻度钢腐蚀也表现出良好的抑制作用,抑制率在84%至95%之间。引入一种简便,高效,环保的方法,在离子液体中通过纳米CuO合成氨基萘酚衍生物,作为一种新型的催化体系。温和,一锅,操作简单和催化剂的可重复使用性使该协议具有重要意义。实验表明,这些化合物可用作低碳钢酸洗的有效缓蚀剂。半经验B3LYP方法用于理论计算。量子化学研究的结果证实了实验结果。
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