PEG-SO<sub>3</sub>H as a Catalyst for the Preparation of Bis-Indolyl and Tris-Indolyl Methanes in Aqueous Media
作者:V. Jhansi Rani、K. Veena Vani、C. Venkata Rao
DOI:10.1080/00397911.2010.551700
日期:2012.7.15
Abstract A facile, efficient, and green synthesis of bis-indolyl and tris-indolyl methanes has been developed by one-pot condensation of indole with structurally diverse aldehydes and ketones in the presence of poly(ethylene glycol)–bound sulfonicacid as catalyst at room temperature. GRAPHICAL ABSTRACT
BiVO4-NPs: an efficient nano-catalyst for the synthesis of biscoumarins, bis(indolyl)methanes and 3,4-dihydropyrimidin-2(1H)-ones (thiones) derivatives
作者:Farhad Shirini、Monireh Pourghasemi Lati
DOI:10.1007/s13738-016-0959-y
日期:2017.1
4-dihydropyrimidin-2(1H)-ones (thiones) derivatives. The structures of the products were characterized by IR, 1HNMR and 13C NMR spectroscopy and comparison with the authentic samples. Easy work-up procedure, excellent yields, short reaction times and reusability of the catalyst are some advantages of this work. In addition, in this article and for the first time, the preparation of 3,4-dihydropyrimidin-2(1H)-ones
BiVO 4 -NPs可用作促进双香豆素,双(吲哚基)甲烷和3,4-二氢嘧啶-2(1 H)-ones(thiones)衍生物合成的有效且可重复使用的纳米催化剂。产物的结构通过IR,1 H NMR和13 C NMR光谱表征,并与真实样品进行比较。简便的后处理程序,优异的收率,较短的反应时间和催化剂的可重复使用性是这项工作的一些优势。另外,在本文中并且首次报道了从醛的被保护的衍生物包括肟,半咔唑酮和1,1-二乙酸酯制备3,4-二氢嘧啶-2(1 H)-酮和-硫酮的报道。
Silica Supported Sodium Hydrogen Sulfate and Amberlyst-15: Two Efficient Heterogeneous Catalysts for Facile Synthesis of Bis- and Tris(1H-indol-3-yl)methanes from Indoles and Carbonyl Compounds1
作者:Chimmani Ramesh、Joydeep Banerjee、Rammohan Pal、Biswanath Das
DOI:10.1002/adsc.200303022
日期:2003.5
synthesized in high yields by an electrophilic substitution reaction of indoles with carbonyl compounds under mild reaction conditions using two efficient heterogeneous catalysts, silicasupportedsodiumhydrogensulfate (NaHSO4⋅SiO2) and amberlyst-15. The second catalyst can be reused.
Eight Schiff base compounds were prepared by condensation of 1-amino-2-propanol with different benzaldehydes in water. One of the Schiff bases, (z)-N-bezylidene-2-hydroxypropane-1-amine (HL1), was used as a bidentate ligand for preparation of a zirconium complex (Zr(L1)2Cl2). The complex has been used as a catalyst for efficient synthesis of wide variety of indole derivatives in EtOH under mild conditions. The turnover number and reusability of the catalyst indicate that it has high efficiency and is fairly stable under the reaction conditions.
Heterogeneous
<scp>
SO
<sub>3</sub>
H
</scp>
@
<scp>
Fe
<sub>3</sub>
O
<sub>4</sub>
</scp>
magnetic nanocatalyst as an efficient and reusable medium for the synthesis of 3,3′‐(arylmethylene)‐bis‐(4‐hydroxycoumarin), bis‐(indolyl)‐methane, and 1,8‐dioxo‐octahydroxanthene derivatives
作者:Xiaobo Wu、Wan‐Xi Peng
DOI:10.1002/jccs.202000087
日期:2020.11
This work aimed to synthesize a new heterogeneous catalyst (SO3H@Fe3O4 magnetic nanoparticles) and the study of its catalytic behavior in synthesizing 3,3′‐(arylmethylene)‐bis‐(4‐hydroxycoumarin), bis‐(indolyl)‐methane, and 1,8‐dioxo‐octahydroxanthene derivatives. The characterization of obtained material has been performed by means of Fourier‐transform infrared spectroscopy, thermogravimetric analysis
这项工作旨在合成一种新的非均相催化剂(SO 3 H @ Fe 3 O 4磁性纳米粒子),并研究其在合成3,3'-(芳基亚甲基)-双-(4-羟基香豆素),双-(吲哚基)-甲烷和1,8-二氧代-八氢氧杂蒽衍生物。通过傅立叶变换红外光谱,热重分析,X射线衍射,振动样品磁力计和透射电子显微镜对获得的材料进行表征。与以前的方法相比,这种新方法的主要特性是反应时间短,反应条件温和,通过永久磁场简单回收催化剂,具有出色的收率,并且催化剂可重复使用至少六次。