Ni–S-methylisothiourea complexes supported on boehmite nanoparticles and their application in the synthesis of 5-substituted tetrazoles

Abstract

ARTICLE This journal isBoehmite nanoparticles is an aluminum oxide hydroxide (ɤ-AlOOH) particles, which were prepared by simple and inexpensive procedure and immobilized further with nickel Smethylisothiourea complex (Ni-SMTU@boehmite), and characterized by FT-IR spectroscopy, TGA, XRD, ICP-OES, EDS, SEM and TEM techniques. Finally, we investigated the catalytic activity of Ni-SMTU@boehmite as a new, heterogeneous, stable and high reusable nanocatalyst for the synthesis of 5-substituted 1H-tetrazole derivatives in PEG-400 as green solvent. This catalyst was recovered by simple filtration and reused several times without significant loss of its catalytic efficiency or nickel leaching. Heterogeneity of this catalyst has been studied using hot filtration and ICP-OES technique. ARTICLE This journal is ARTICLEThis journal is

Zirconium oxide complex anchored on boehmite nanoparticles as highly reusable organometallic catalyst for C–S and C–O coupling reactions

“…Therefore in continuation of our studies of the application of boehmite as an insoluble support, here we report a complex of zirconium oxide that is immobilized on BNPs (Pr.S‐ZrO@boehmite). This catalyst was used for C–S and C–O coupling reactions.…”

“…[19][20][21] For these reasons, many methods have been reported for the preparation of BNPs, but these reports focused on physical and chemical properties of BNPs. [22][23][24] Therefore in continuation of our studies of the application of boehmite as an insoluble support, [25,26] here we report a complex of zirconium oxide that is immobilized on BNPs (Pr.S-ZrO@boehmite). This catalyst was used for C-S and C-O coupling reactions.…”

Mesoporous Caged‐γ‐AlOOH‐Double‐Stranded RNA Analog Complexes for Cancer Immunotherapy

“…that can be built-up axially in mimicked nanorod orientations composed of AlO 4 (OH) 2 octahedral unit blocks. [19,20] The broadening of (0 2 0), (1 2 0), (0 3 1), (0 5 1), (151), (2 3 1), and (2 5 1) reflection peaks indicates that the γ-AlOOH is composed of nanocrystals. The FTIR spectra (Figure 1Ab) show the symmetrical and asymmetrical OH stretching vibration modes at 3095 and 3364 cm −1 , indicating the presence of OH bonds on the oxyhydroxide layer, and several absorption bands at 480, 623, and 740 cm −1 , which correspond to the AlO bonds.…”

Synthesis of α‐Aminonitriles and 5‐Substituted 1H‐Tetrazoles Using an Efficient Nanocatalyst of Fe3O4@SiO2–APTES‐supported Trifluoroacetic Acid

“…An isocyanide‐based multicomponent reaction (Passerini‐azide and Ugi‐azide reactions) is also used for the synthesis of tetrazoles . According to the literature, 5‐substituted and 1‐substituted 1 H ‐tetrazoles have been synthesized using different azide agents (NaN 3 , TMSN 3 , and [bmim]N 3 ) and catalyzed by different systems such as SnCl 2 –SiO 2 , InCl 3 , ZnS nanoparticles (NPs) , Pt NPs@rGO , Cu–MCM‐41 , MCM‐41–SO 3 H , SiO 2 –H 3 BO 3 , Fe 3 O 4 @chitin , and boehmite–Ni . However, the reported works suffer from serious drawbacks such as using harmful organic solvents [e.g., dimethylformamide (DMF)], operating at elevated temperatures (above 100°C), requiring excessive time to reaction completion, and, in some cases, poor catalyst recyclability and reusability.…”