Majid M. Heravi

Alzahra University · Department of Chemistry

In this study, a tri-component composite named Zr/SiW12/GO was meticulously prepared through an ultrasonic-assisted method. This composite incorporates zirconium nanoparticles (Lewis acid), a negatively charged Keggin type polyoxometalate, and graphene oxide, and serves as a remarkable heterogeneous catalyst. The Keggin component plays multiple rol...

Recently, Cu nanoparticles (NPs) encapsulated into various materials as supports (e.g., zeolite, silica) have attracted much devotion due to their unique catalytic properties such as high catalytic activity, intensive reactivity and selectivity through highly protective properties. Nowadays, the superior catalytic activity of Cu-NPs, encapsulated o...

This study explains the Suzuki coupling reaction catalyzed by Pd@C for the formation of Biphenyl derivatives. The Suzuki reactions that catalyzed by this heterogeneous catalyst had good yields. Furthermore, the catalytic recyclability of Pd@C was examined. The catalyst could be successfully removed from the reaction mixture by simple filtration and...

A magnetic catalyst is synthesized through growth of dendrimer of generation 3 (G3) on the surface of halloysite (Hal) nanotubes followed by decoration of dendrimer terminal groups with ionic liquid (IL) and incorporation of Fe species. The structure of the catalyst was confirmed by using several characterization techniques. Moreover, the catalytic...

Amine functionalized core shell Fe 2 O 3 hollow spheres (h Fe 2 O 3 @SiO 2 N) were decorated with Cl functionalized cyclodextrin nanosponge, CDNS Cl, covalently The resulting hybrid system, hFe 2 O 3 @SiO 2 CDNS, was then used as a magnetically separable support for immobilization of Pd( 0 nanoparticles, derived from a bio based approach Moreover,...

Melamine based polymer (MT) was prepared and then reacted with a mixture of glucose (Glu) β-cyclodextrin (CD) under hydrothermal conditions to afford, MT/Glu-CD. Then, the adsorption of Pd salt was realized on MT/Glu-CD. The resulting compound was subsequently carbonized to furnish Pd/MT/C that exhibited high catalytic activity for the Sonogashira...

A heterogeneous catalyst Ag@Hal-T is prepared through functionalization of halloysite nanotube with 1H-1,2,3-triazole-5- methanol and subsequent immobilization of silver nanoparticles through bio-assisted approach using Arctiumplatylepis extract. The catalytic activity of the catalyst was studied for the synthesis of tetrahydro-4Hchromene derivativ...

A ternary hybrid system composed of halloysite nanotubes, Hal, cyclodextrin nanosponges, CDNS, and g-C3N4 is prepared and used for immobilization of Pd(0) nanoparticles and development of a heterogeneous catalyst, Pd@hal-CDNS-g-C3N4 for promoting ligand and copper-free Suzuki coupling reactions in aqueous media.

A magnetic carbon based hybrid catalyst, Pd@g-C3N4-Fe-GO, is prepared through covalent conjugation of magnetic graphitic carbon nitride and graphene oxide followed by incorporation of Pd nanoparticles and then its catalytic activity for promoting the A3 coupling reactions of phenylacetylene, amines and aldehyde in under mild reaction condition was...

Halloysite nanoclay (Hal) was functionalized with (3-chloropropyl) trimethoxysilan and subsequently reacted with thiosemicarbazide and furfural to furnish furfural imine functionalized Hal, which could serve as an efficient support for immobilization of copper species. The catalytic activity of this catalyst was studied for the preparation of pyran...

Using boehmite as an available and low-cost natural compound, a bi-functional catalytic composite is prepared through vinyl-functionalization of boehmite, followed by polymerization with the as-prepared bis-vinylimidazolium bromide ionic liquid and supporting of phosphotungstic acid. The catalyst was characterized via ICP, XRD, TGA, FTIR, SEM/EDS a...

In continues efforts to the synthesis of polyoxometalate (POM) as catalysts, two lacunary POM-based heterogeneous catalysts (TBA)9[BW11O39]·11H2O ((TBA)9BW11) and (TBA)6[Zr(OH)BW11O39]·8H2O ((TBA)6BZrW11) (TBA+: tetrabutylammonium) were synthesized and fully characterized using different techniques. The role of the cationic alkyl chains (TBA+) not...

Polyoxometalates (POMs) are a subset of metal oxides that represent a tremendous range of inorganic clusters with an unmatched range of physical and chemical properties and the ability to generate dynamic structures that can range in size from the nano- to micrometer scale. On the one hand, POMs can undergo reversible multielectron redox transf...

One of the main drawbacks of supported ionic liquids is their low loading and consequently, low activity of the resultant catalysts. To furnish a solution to this issue, a novel heterocyclic ligand with multi imine sites was introduced on the surface of amino-functionalized halloysite support via successive reactions with 2,4,6-trichloro-1,3,5-tria...

Combining the encapsulating capability of cyclodextrin and instinctive features of bentonite clay, a versatile metal free catalyst has been developed that could promote various chemical reactions such as Knoevenagel condensation, synthesis of xanthan and octahydroquinazolinones in aqueous media under ultrasonic irradiation. To prepare the catalyst,...

A novel biochar-based graphitic carbon nitride was prepared through calcination of Zinnia grandiflora petals and urea. To provide acidic and ionic-liquid functionalities on the prepared carbon, the resultant biochar-based graphitic carbon nitride was vinyl functionalized and polymerized with 2-acrylamido-2-methyl-1-propanesulfonic acid, acrylic aci...

Abstract In attempt to develop a biocompatible metal-free catalyst, a dendritic moiety was grown on chitosan through successive reactions with 2,4,6-trichloro-1,3,5-triazine and ethylenediamine. Subsequently, the terminal functional groups of the dendron were decorated with 1-methylimidazolium chloride. The catalyst was characterized with SEM, EDS,...

Novel and efficient multicomponent reactions (MCRs) involving diketene, ninhydrin (indane-1,2,3-trione) and one primary amine (3CR) or two different primary amines (4CR) were achieved for the successful synthesis of dihydro-4H-indeno[1,2-b]furan-3-carboxamides or tetrahydroindeno[1,2-b]pyrrole-3-carboxamides, respectively. The merits of this method...

For the first time the catalytic activity of AgNdSiW11, was examined in two named reactions, namely Hantzsch and Biginelli reactions. A simple, eco-friendly and highly efficient one-pot synthesis of polyhydroquinoline derivatives via Hantzsch multicomponent reactions (MCRs) involving cyclocondensation of differently-substituted aldehydes, β-ketoest...

A novel magnetic catalyst, (SGCN/Fe3O4/PVIs/Pd) was synthesized by growing of poly(1-vinylimidazole) on the surface of ionic liquid decorated magnetic S-doped graphitic carbon nitride, followed by stabilization of palladium nanoparticles. Catalytic activity of the prepared heterogeneous catalyst was explored for the catalytic reduction of hazardous...

Ugi-azide four-component reaction (UA-4CR) as development on Ugi four-component reaction (U-4CR) is the condensation reaction involving an aldehyde, an amine, an isocyanide, and an azide source. Nowadays, UA-4CR has been employed for the efficient and facile production of 1,5-disubstituted-1H-tetrazoles (1,5-DS-1H-Ts). Interestingly, the combinatio...

A unique one-pot, simultaneous nitrodebromination and methyl bromonitration occurred upon treatment of 5-bromo-2,4-di-tert-amino-6-methylpyrimidine derivatives with a cold mixture of concentrated H2SO4–HNO3 in moderate yields. It is actually a facile and rapid transformation that has been reported neither on pyrimidines nor simultaneously on other...

Using urea and glucose as cost effective and available raw materials, a eutectic solvent, was fabricated and applied as a precursor to form N-doped carbon. Subsequently, the eutectic solvent-derived carbon was reacted with halloysite nanoclay through hydrothermal process to produce a novel nanocomposite. The resultant compound was utilized as a sup...

Silver nanoparticles were immobilized on magnetic polyallylamine (PAA) decorated g-C3N4 by using Heracleum persicum extract as a biological reducing and stabilizing agent. The resulting nanocomposite, Fe3O4-g-C3N4-TCT-PAA-Ag, was then characterized using BET, VSM, XRD, TGA, FTIR, TEM, EDS and ICP. The catalytic performance of the synthesized nanoca...

Using natural materials, i.e. halloysite nanoclay that is a biocompatible naturally occurring clay and Heracleum persicum extract that can serve as a green reducing agent, a novel magnetic catalyst, Fe3O4/Hal-Mel-TEA(IL)-Pd, has been designed and fabricated. To prepare the catalyst, halloysite was first magnetized (magnetic particles with mean diam...

Density functional calculations have been applied to study reactions of the HSSS. radical with guanine at the C2, C4, C5, and C8 sites of guanine that yields [GCn-SSSH].n = 2, 4, 5, and 8 adducts. Also, formation of 8-thioguanine from [GC8-SSSH]. adduct has been studied. In all the adducts [GCn-SSSH]., HSSS. radical is placed on the top of the plan...

The cover image is based on the Original Article* Synthesis of palladated magnetic nanoparticle (Pd@Fe3O4/AMOCAA) as an efficient and heterogeneous catalyst for promoting Suzuki and Sonogashira cross‐coupling reactions by Majid Heravi ** et al., https://doi.org/10.1002/aoc.5538.***

A facile, efficient and un‐catalyzed approach for the synthesis of new symmetrical highly‐ substituted indeno [1,2‐b]pyrrole derivatives through four‐component reaction, involving, primary amines, diamine, diketene, and ninhydrin in CH2Cl2 at ambient temperature is reported. This approach enjoys merits such as being done in the absence of catalyst...

A Brønsted acid-catalyzed reaction of 6-amino uracil and isatin-derived propargylic alcohols for the synthesis of a series of oxindole-fused pyrimidine in good-to-high yields was achieved (up to 94%). Furthermore, the reaction of isatin-derived propargylic alcohols and 1,3-dimethylbarbituric acid or ethyl 3-aminocrotonate gave oxindoles containing...

Among a plethora of known and established oxidant in organic chemistry, hydrogen peroxide stands in a special position. It is commercially and inexpensively available, highly effective, selective, and more importantly it is compatible with current environmental concerns, dictated by principles of green chemistry. Several chemicals or their intermed...

A novel, highly stable and green ZnCl2 nanoparticles (NPs) of modified poly(styrene-co-maleic anhydride) (SMA) was prepared by a simple procedure and was used to investigate the efficiency of the Click reaction. In this regard, SMA was modified with 3-aminopyridine to obtain the corresponding poly(styrene-co-maleimide) (SMI). ZnCl2 was immobilized...

In this article, halloysite nanoclay (Hal) was used as porogen for the synthesis of nitrogen doped porous carbon material with high specific surface area and pore volume. To this purpose, polymerization of melamine and terephthalaldehyde (MT) was performed in the presence of amine-functionalized carbon coated Hal (Hal@Glu-2N) that was prepared from...

A novel polymer supported [poly (styrene‐co‐maleic imide) (SMI)]Cu(I) nano‐particles was prepared via in situ reaction of 4‐amino‐5‐methyl‐4H‐1,2,4‐triazole‐3‐thione with [poly (styrene‐co‐maleic anhydride)] (SMA) along with immobilization of CuI. These nano‐particles were fully characterized by using scanning electron microscopy (SEM), energy disp...

Palladium supported magnetic nanoparticle (Pd@Fe3O4/AMOCAA) was easily prepared in the presence of Scrophularia striata extract and fully characterized by FT‐IR, SEM, VSM, TEM, TGA, XRD and EDAX. It was successfully employed as an easily separable and reusable effective heterogeneous catalyst classical Suzuki and Sonogashira cross‐coupling reaction...

A novel metal-free solid acid catalyst, PHSA, has been designed and synthesized through facile and environmentally benign procedure via using halloysite nanoclay as a natural and biocompatible support. The synthetic protocol included co-polymerization of 2-acrylamido-2-methylpropane sulfonic acid and acrylic acid in the presence of vinyl functional...

Benzylsulfamic acid has been prepared and introduced as a new heterogeneous acid catalyst. This reagent was used for the synthesis of new bis(indolyl)methanes 3a – 3f via reaction of bis-aldehydes 1 with indoles 2 at 100°C. All reactions were performed under solvent-free conditions with high to excellent yields. The synthesized bis(indolyl)methanes...

The reaction of activated phenolic compounds, 2,4,6-triaryloxy-1,3,5-triazine (aryl-triazine ethers) with various isocyanates or carbodiimides in the presence of a nickel pre-catalyst resulted in the synthesis of aryl amides in good...

In attempt to broaden the use of cyclodextrin polymer for catalytic purposes, a novel covalent hybrid system was prepared through growth of multi-nitrogen atom containing polymer (PMelamine) derived from reaction of ethylenediamine and 2,4,6-trichloro-1,3,5-triazine on the functionalized cyclodextrin polymer (CDNS). The resulting hybrid system was...

Melamine based polymer (MT) was prepared and then reacted with a mixture of glucose (Glu) and β-cyclodextrin (CD) under hydrothermal conditions to afford, MT/Glu-CD. Then, the adsorption of Pd salt was realized on MT/Glu-CD. The resulting compound was subsequently carbonized to furnish Pd/MT/C that exhibited high catalytic activity for the hydrogen...

To take advantage of the properties of graphitic carbon nitrides and carbon quantum dots, a novel hybrid system was designed based on the synthesis and palladating of magnetic carbon quantum dots followed by hydrothermal treatment with graphitic carbon nitrides. The resulting hybrid, g‐C3N4‐Pd/CQDs@Fe, was then utilized as an efficient catalyst for...

A novel and efficient four component reaction involving diketene, primary amines, aromatic aldehydes and 2-amino-benzimidazole in the presence of I2 in refluxing EtOAc for the synthesis of benzo[4,5]imidazo[1,2-a]-pyrimidine-3-carboxamides is reported. Good yields, mild reaction conditions and facile isolation of products in pure forms are advantag...

The incorporation of polyoxometalates (POMs) or metal oxides into the metal–organic frameworks opens new research avenues for the synthesis of heterogeneous catalysts. In this project, a catalytic system based on neodymium clusters and Keggin-type of heteropoly acid (HPA) (Na[Nd(pydc-OH)(H2O)4]3}[SiW12O40]) was used as heterogeneous catalyst for on...

H5BW12O40 (BWA), Keggin-type heteropoly acid was employed as an effective, eco-friendly and reusable Lewis acid catalyst for the high yielding synthesis of chromenopyrimidine-2,5-diones and thioxochromenopyrimidin-5-ones via multicomponent reaction (MCR) of differently substituted benzaldehydes, urea/thiourea, and 4-hydroxycoumarin in refluxing wat...

A novel nitrile-/cyano-free ionic liquid was synthesized and carbonized under two different carbonization methods in the presence of ZnCl2 as a catalyst to afford N-doped carbon materials. It was found that the carbonization condition could affect the nature and textural properties of the resulting carbon. In the following, ionic liquid-derived car...

Bicyclic compounds derived from pyrazine and aromatic five-membered heterocycles including thiophene, furan and pyrrole show various biological and pharmacological properties such as anti-inflammatory, antiviral, antitumor, antioxidant, antimycobacterial, and cytostatic activities. In many cases, it has been demonstrated that they are much more pot...

Carbon nanospheres, CCDs, were fabricated using β-cyclodextrin as carbon precursor. The as prepared CCD was then hybridized with halloysite nanotubes (Hal) through hydrothermal treatment to furnish a nanocomposite, Hal-CCD that was subsequently applied as support to stabilize Pd nanoparticles. Investigation of the catalytic activity of palladated n...

The palladium-catalyzed reaction of aryl halide and boronic acid for the formation of C–C bonds so-called Suzuki–Miyaura cross-coupling reaction has many applications in modern synthetic organic chemistry. In 2013, we underscored the applications of the intramolecular Suzuki cross-coupling reaction in cyclization and heterocyclization. Due to a ple...

In this study, soil microorganisms from Iran were screened for ω-transaminase (ω-TA) activity based on growth on minimal media containing (rac)-α-methylbenzylamine (rac-α-MBA) as a sole nitrogen source. Then, for the selection of strains with high enzyme activity, a colorimetric o-xylylendiamine assay was conducted. The most promising strains were...

Abstract: ω-Transaminases’ (ω-TAs) importance for synthesizing Chiral β-amino acids led to identify and characterize new sources of these enzymes. In this study, soil microorganisms from Iran were screened for ω-transaminase (ω-TA) activity based on growth on minimal media containing (rac)-α-methylbenzylamine (rac-α-MBA) as a sole nitrogen source....

In this article, a magnetic carbon-coated halloysite nanoclay (Hal) was prepared through introduction of hydrothermally carbonized glucose (Glu) on Hal followed by the immobilization of magnetic nanoparticles (MNPs) and incorporation of resorcinol-formaldehyde polymeric shell (RF) and carbonization. The resulting composite was then successfully app...

Dedicated to Professor Mehdi Ghandi, for his continuous devotions, endeavours, and achievements in the field of organic chemistry in IranThe application of Ugi four‐center three‐component reaction (U‐4 C‐3CR), a development of the well‐known Ugi four‐component reaction (U‐4CR), using different bifunctional building blocks in the synthesis of differ...

Hollow magnetic nanoparticles (MNPs) with tetrahedral morphology were synthesized and then covered by a shell prepared by coating with melamine–formaldehyde followed by the introduction of glucose‐derived carbon. Subsequently, Pd nanoparticles were immobilized and the core–shell nanocomposite was carbonized. The obtained magnetic catalyst was succe...

A covalent hybrid of halloysite-poly(methyl methacrylate-co-maleic anhydride) was prepared and applied for the immobilization of Pd nanoparticles. The hybrid system, Pd@Hal-Gua-Poly, was then characterized via TEM, TGA, ICP, BET, FTIR and XRD and successfully used as a heterogeneous catalyst for promoting two main Pd-catalyzed reactions, i.e. hydro...

A series of polyhydroquinoline derivatives were effectively synthesized via Hantzsch reaction in high yields in the presence of catalytic amounts of a highly negatively charged borotungstic acid H5BW12O40 in refluxing EtOH under green and mild reaction conditions. It is a Keggin-type heteropoly acid with a higher negative charge and strong Brønsted...

Two hitherto unknown magnetic nanoparticles were prepared through the immobilization of Dysprosium (Dy) and Praseodymium (Pr) Complexes on the surface of CoFe2O4, using commercially available or easily accessible materials under green conditions. They were fully characterized, using, FT‐IR, SEM, EDX, ICP‐OES, XRD and TGA techniques. Photocatalytic...

One of the most important name reactions in organic chemistry, is the Diels‐Alder cycloaddition reaction. It is a chemical reaction between a conjugated diene and a substituted alkene, commonly termed the dienophile to construct a substituted cyclohexene derivative. It is the stereotypical example of a pericyclic reaction with a concerted mechanism...

Hantzsch pyridine synthesis or Hantzsch dihydropyridines (DHPs) synthesis is actually a pseudo-four component reaction between an aldehyde, such as benzaldehyde, a β-keto ester such as ethyl acetoacetate and a nitrogen source such as ammonium acetate or ammonia to afford the coresponding DHPs. A certain DHP for example 1,4-DHP dicarboxylate, such a...

A new type of quadruple hybrid system was prepared containing chitosan (CS), folic acid (FA), Poly(styrene-co-maleic anhydride) [SMA] and ionic liquid (IL). This nanocatalyst was synthesized by the functionalization of SMA with folic acid and then polymerization with chitosan in the presence of DCC and NHS. CuI was immobilized onto this support to...

Five Lindqvist-type lanthanopolyoxometalates ([Ln(W5O18)2]9–, Ln = La, Ce, Nd, Gd, Tb) complexes were prepared and fully characterized. Their basic catalytic activity was manipulated in the successful and high yielding synthesis of a series of pyrazolopyranopyrimidines via a four-component reaction, involving ethyl acetoacetate, hydrazine hydrate,...

The Wittig reaction enables the synthesis of an alkene from the reaction of an aldehyde or ketone with the ylide generated from a phosphonium salt. Undoubtedly, its usefulness in the synthesis of alkenes in an anticipated manner has resulted in the introduction of an attractive principle in synthetic organic chemistry, particularly in the total syn...

A hybrid system involving graphene oxide (GO), magnetic oxide (Fe3O4), acrylamide and dicyandiamide was prepared via amine functionalization of GO/Fe3O4 by means of covalent bonding with acrylamide and subsequent reaction with dicyandiamide to provide a multinitrogen containing polymer on the surface of GO. This hybrid system was utilized as a hete...

An efficient and simple method for the synthesis of chromeno[2,3-d]pyrimidine-diones using SMA/Py/ZnO catalyst has been reported. Zinc oxide nanoparticles were coordinated on a modified poly(styrene-comaleic anhydride) (SMA) support to prevent agglomeration and reduction catalytic activity. The polymer support was easily prepared from the reaction...

An inorganic–organic hybrid based on lanthanide clusters and Keggin type polyoxometalates (POMs) (Na[Nd (pydc‐OH)(H2O)4]3}[SiW12O40]) was used the first time as trinuclear catalyst for one pot synthesis of pyrazolo[4́́,3́:5,6]pyrido[2,3‐d]pyrimidine‐diones, via two different four and five‐component reactions involving hydrazine hydrate, ethyl aceto...

A facile, efficient and eco‐friendly catalytic protocol was developed for the synthesis of medicinally important pyran‐annulated heterocycles via multicomponent reaction (MCR). Cyclocondensation of differently substituted aromatic aldehydes, malononitrile/ethyl cyanoacetate and various β‐dicarbonyl compounds in the presence of Ag3[PMo12O40]⋅nH2O as...

With the aim of benefiting from the advantage of magnetic catalysts, chemistry of cyclodextrin, i. e. the capability of formation of inclusion complex and acting as phase transferring agent, as well as biochars as biocompatible, cost‐effective and efficient catalyst support, for the first time a ternary hybrid system composed of cyclodextrin nanosp...

XtalFluor-E, [Et2NSF2]BF4, is best known as a useful, versatile and inexpensive commercially available reagent for the deoxyfluorination of carbonyl compounds and alcohols. Although XtalFluor-E is commonly used in combination with an exogenous fluoride source as a deoxofluorinating reagent, it has also been widely employed in other chemical transfo...

Oxalyl chloride, (COCl)2, as an inexpensive commercially available chemical is one of the most versatile applicable organic reagents in chemical transformations. It is also employed extensively in various chemical indu