First report of the direct supporting of palladium–arginine complex on boehmite nanoparticles and application in the synthesis of 5‐substituted tetrazoles

Aghavandi

Mohammadi

2020

Applied Organom Chemis

In this work, a versatile protocol was introduced for the preparation of a new Cu(I) supported complex on Silica supported boehmite nanoparticles (Boehmite@SiO2@Tris‐Cu(I)). The structure of the catalyst was comprehensively characterized using Fourier transform infrared spectroscopy (FT‐IR), X‐Ray Diffractometer (XRD), energy‐dispersive X‐ray spectroscopy (EDS), inductively coupled plasma atomic emission spectroscopy (ICP), X‐ray mapping, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) techniques. The catalytic activity of this catalyst was studied in the Suzuki cross‐coupling reaction and synthesis of 5‐substituted 1H‐tetrazole derivatives in ethanol and PEG‐400 respectively as green solvents. In this sense, simple preparation of the catalyst from the commercially available materials, high catalytic activity, simple operation, short reaction times, high yields and use of green solvent are some advantages of this protocol. Finally, it is worth mentioning that this nanocatalyst was easily recovered, and reused for several times without significant loss of its catalytic efficiency. In addition, stability of the catalyst after recycling was confirmed by FT‐IR technique.

Section: Entrymentioning

confidence: 99%

Boehmite@SiO₂@ Tris (hydroxymethyl)aminomethane‐Cu(I): a novel, highly efficient and reusable nanocatalyst for the C‐C bond formation and the synthesis of 5‐substituted 1H‐tetrazoles in green media

Aghavandi

Mohammadi

2020

Applied Organom Chemis

“…Homoselectivity which is a great and imprtant property in the synthesis of various organic compounds is also observed in the same functional groups with similar electronic nature and steric hindrance. [54,55] Homoselectivity of Cu-Guanidine@BO-NPs was investigated in the [3 + 2] [42] 11 Pentanenitrile 780 85 193 14.8 41-43 41-43 [53] a Isolated yield. similar cyano functional groups on ortho position of aromatic ring.…”

Section: Catalytic Study Of Cu-guanidine@bo-npsmentioning

confidence: 99%

Guanidine complex of copper supported on boehmite nanoparticles as practical, recyclable, chemo and homoselective organic–inorganic hybrid nanocatalyst for organic reactions

Jafari

Hasanzadeh

2020

Applied Organom Chemis

Boehmite (BO) nanoparticles (NPs) were prepared via the injection of aqueous NaOH solution to aqueous aluminum nitrate solution at room temperature. Afterwards, a new complex of copper was immobilized on BO-NPs (Cu-Guanidine@BO-NPs). This heterogeneous nanocatalyst was used as a practical, recyclable, chemo and homoselective nanocatalyst in the organic processes, i.e. the preparation of tetrazole five-membered heterocycles and chemoselective sulfoxidation of sulfides using H 2 O 2 as oxidant. In this sense, the prepared nanocatalyst was characterized by AAS, N 2 adsorptiondesorption isotherms, WDX, EDS, SEM, and TGA techniques. The reusability of this catalyst was investigated in the described organic reactions for several runs without notable loss of its catalytic activity. Moreover, all of the tetrazole and sulfoxide derivatives were isolated in high Turn Over Number (TON) and Turn Over Frequency (TOF) numbers indicating the high activity and selectivity of Cu-Guanidine@BO-NPs in the described reactions.

“…Boehmite nanoparticles have high specific surface area including high density of hydroxyl groups on its surface, while it is inert in various chemical conditions . More addition, boehmite nanoparticles can be prepared in water using commercial available materials such as aluminum nitrate and sodium hydroxide, therefore boehmite is very inexpensive and easy available . These unique properties of boehmite led that it can be used as ideal support for heterogenization of homogeneous catalysts .…”

Section: Introductionmentioning

confidence: 99%

“…[29][30][31][32][33] More addition, boehmite nanoparticles can be prepared in water using commercial available materials such as aluminum nitrate and sodium hydroxide, therefore boehmite is very inexpensive and easy available. [34][35][36] These unique properties of boehmite led that it can be used as ideal support for heterogenization of homogeneous catalysts. [37][38][39] Several methods have been reported for the preparation of boehmite nanoparticles and the effect of different condition on its morphologies, chemical and physical properties has been studied.…”

Section: Introductionmentioning

confidence: 99%

New Complex of Copper on Boehmite Nanoparticles as Highly Efficient and Reusable Nanocatalyst for Synthesis of Sulfides and Ethers

Heidarnezhad

Tahmasbi

2019

ChemistrySelect

Self Cite

Boehmite is a cubic orthorhombic structure of aluminum oxide hydroxide, which prepared via addition of sodium hydroxide solution to an aluminum nitrate solution at room temperature. In this work, the surface of boehmite nanoparticles (BNPs) modified by 3‐choloropropyltrimtoxysilane (3‐CPTMS), then reacted with N,N,N′,N′‐tetraethyldiethylentriamine (TEDETA). Eventually, CuI immobilized on modified boehmite (CuI‐TEDETA@BNPs). Structure of this catalyst was characterized using FT‐IR, TEM, SEM, EDS, TGA, and AAS techniques. Finally, the catalytic activity of CuI‐TEDETA@BNPs was studied for the synthesis of ethers and sulfides. All ethers and sulfides were obtained in high yields, which reveals the high activity of described catalyst. This catalyst was reused for several times without significant loss of its catalytic efficiency. Recovered catalyst was characterized by SEM and FT‐IR techniques, which shown a good agreement with fresh catalyst. Also, heterogeneity and stability of CuI‐TEDETA@BNPs confirmed by hot filtration test.