108-45-2Relevant academic research and scientific papers
Magnetic nanoparticle-tethered Schiff base–palladium(II): Highly active and reusable heterogeneous catalyst for Suzuki–Miyaura cross-coupling and reduction of nitroarenes in aqueous medium at room temperature
Manjunatha,Koley, Tuhin S.,Kandathil, Vishal,Dateer, Ramesh B.,Balakrishna, Geetha,Sasidhar,Patil, Shivaputra A.,Patil, Siddappa A.
, (2018)
As a continuation of our efforts to develop new heterogeneous nanomagnetic catalysts for greener reactions, we identified a Schiff base–palladium(II) complex anchored on magnetic nanoparticles (SB-Pd@MNPs) as a highly active nanomagnetic catalyst for Suzuki–Miyaura cross-coupling reactions between phenylboronic acid and aryl halides and for the reduction of nitroarenes using sodium borohydride in an aqueous medium at room temperature. The SB-Pd@MNPs nanomagnetic catalyst shows notable advantages such as simplicity of operation, excellent yields, short reaction times, heterogeneous nature, easy magnetic work up and recyclability. Characterization of the synthesized SB-Pd@MNPs nanomagnetic catalyst was performed with various physicochemical methods such as attenuated total reflectance infrared spectroscopy, UV–visible spectroscopy, inductively coupled plasma atomic emission spectroscopy, energy-dispersive X-ray spectroscopy, field-emission scanning electron microscopy, transmission electron microscopy, powder X-ray powder diffraction, thermogravimetric analysis and Brunauer–Emmett–Teller surface area analysis.
The novel reduction systems: NaBH4-SbCl3 or NaBH4-BiCl3 for conversion of nitroarenes to primary amines
Ren,Pan,Dong,Wu
, p. 3799 - 3803 (1995)
Nitroarenes can be conveniently reduced to primary amines in good to excellent yields by sodium borohydride in the presence of bismuth chloride or antimony chloride.
Fe3O4@graphene oxide composite: A magnetically separable and efficient catalyst for the reduction of nitroarenes
He, Guangyu,Liu, Weifeng,Sun, Xiaoqiang,Chen, Qun,Wang, Xin,Chen, Haiqun
, p. 1885 - 1890 (2013)
We reported a facile co-precipitation method to prepare a highly active Fe3O4@graphene oxide (Fe3O4@GO) composite catalyst, which was fully characterized by means of X-ray diffraction (XRD), Fourier transformed infrared (FTIR) spectroscopy, transmission electron microscopy (TEM) and N2 adsorption-desorption measurements. The results demonstrated that the Fe3O4 nanoparticles (Fe 3O4 NPs) with a small diameter of around 12 nm were densely and evenly deposited on the graphene oxide (GO) sheets. The as-prepared Fe3O4@GO composite was explored as a catalyst to reduce a series of nitroarenes for the first time, which exhibited a great activity with a turnover frequency (TOF) of 3.63 min-1, forty five times that of the commercial Fe3O4 NPs. The dosages of catalyst and hydrazine hydrate are both less than those reported. Furthermore, the composite catalyst can be easily recovered due to its magnetic separability and high stability.
NiO-Al2O3 prepared from a Ni-Al hydrotalcite precursor as an efficient catalyst for transfer hydrogenation reactions
Jyothi,Raja,Talawar,Sreekumar,Sugunan,Rao
, p. 1573 - 1579 (2000)
NiO-Al2O3 catalyst prepared by calcining a Ni-Al hydrotalcite precursor efficiently reduces nitroarenes and carbonyl compounds in presence of propan-2-ol and KOH. Presence of two different reducible groups in the substrate leads to chemoselective reduction.
Efficient reduction of nitro compounds and domino preparation of 1-substituted-1H-1,2,3,4-tetrazoles by Pd(ii)-polysalophen coated magnetite NPs as a robust versatile nanocomposite
Xu, DaPeng,Xiong, Meilu,Kazemnejadi, Milad
, p. 12484 - 12499 (2021)
A new, versatile, and green methodology has been developed for the efficient NaBH4-reduction of nitroarenes as well as the domino/reduction MCR preparation of 1-substituted-1H-1,2,3,4-tetrazoles using Pd(ii)-polysalophen coated magnetite NPs as an efficient heterogeneous magnetically recyclable nanocatalyst. Polysalophen was firstly prepared based on a triazine framework with a high degree of polymerization, then coordinated to Pd ions and, finally, the resulting hybrid was immobilized on magnetite NPs. The catalyst was characterized by various instrumental and analytical methods, including GPC, DLS, N2adsorption-desorption, TGA, VSM, TEM, HRTEM, EDX, XPS, XRD, and ICP analyses. The catalyst possesses dual-functionality including the reduction of nitroarenes and the construction of tetrazole rings all in one stepviaa domino protocol. High to excellent yields were obtained for both nitro reduction and the direct preparation of 1-substituted-1H-1,2,3,4-tetrazoles from nitro compounds. Insight into the mechanism was conducted by XPSin situas well as DLSin situalong with several control experiments. Recyclability of the catalyst was studied for 6 consecutive runs along with metal leaching measurements in each cycle.
REDUCTION OF AROMATIC NITRO COMPOUNDS TO AMINES BY BENZENETELLUROL
Ohira, Noriyuki,Aso, Yoshio,Otsubo, Tetsuo,Ogura, Fumio
, p. 853 - 854 (1984)
Benzenetellurol was conveniently generated by methanolysis of phenyl trimethylsilyl telluride or reduction of diphenyl ditelluride with phosphinic acid or sodium borohydride, and smoothly reduced aromatic nitro compounds to the corresponding amines.
Synthesis of In2S3-CNT nanocomposites for selective reduction under visible light
Yang, Min-Quan,Weng, Bo,Xu, Yi-Jun
, p. 1710 - 1720 (2014)
In2S3-carbon nanotube (In2S 3-CNT) nanocomposites have been prepared via a facile refluxing wet chemistry process. The as-synthesized In2S3-CNT nanocomposites can be used as selective and a
Preparation and characterization of copper chloride supported on citric acid-modified magnetite nanoparticles (Cu2+-CA@Fe3O4) and evaluation of its catalytic activity in the reduction of nitroarene compounds
Ghonchepour, Ehsan,Yazdani, Elahe,Saberi, Dariush,Arefi, Marzban,Heydari, Akbar
, (2017)
A new, powerful and recyclable copper catalyst were prepared by heterogenization of copper chloride using of Fe3O4 nano particles modified with citric acid as a linker. This system can catalyze reduction of nitroaren compound to aniline derivatives in the presence of Sodium borohydride as a reduction agent in moderate to good yields. In addition, easy separation and recoverable with an external permanent magnet is the dominant properties of this catalyst (Cu2+-CA@Fe3O4).
Synthesis, characterization, and application of easily accessible resin-encapsulated nickel nanocatalyst for efficient reduction of functionalized nitroarenes under mild conditions
Rani, Poonam,Singh, Kamal Nain,Kaur, Amarjit
, (2018)
Abstract: A novel resin-encapsulated nickel nanocatalyst has been synthesized by a modified impregnation method using nickel acetate tetrahydrate in presence of sodium borohydride as a mild reducing agent. The synthesized nanocatalyst was characterized by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The concentration of nickel nanoparticles encapsulated on resin was determined by inductively coupled plasma-mass spectroscopy (ICP-MS). Further, synthesized resin-encapsulated nickel nanocatalyst was found to be stable and efficient in micromolar concentrations, for the selective reduction of functionalized nitroarenes to corresponding amines in good to high yield, under mild reaction conditions. The nanocatalyst shows excellent reusability. Graphical Abstract: SYNOPSIS A novel resin-encapsulated nickel nanocatalyst (Ni@XAD-4) was synthesized using a modified impregnation method. The nanocatalyst exhibited excellent catalytic activity towards the selective reduction of functionalized nitroarenes in the presence of NaBH 4 with reusability up to five cycles.[Figure not available: see fulltext.].
Rapid and inexpensive method for reduction of nitroarenes to anilines
Desai,Swami,Hapase
, p. 1033 - 1036 (1999)
Nitroarenes are reduced to corresponding anilines in good yields using ferric chloride - Zinc - Dimethyl formamide - water system.
