Article
Chemistry, Physical
G. Rangel-Porras, A. Quiroga-Almaguer, A. Ramirez-Hernandez, B. Bachiller-Baeza, H. Pfeiffer-Perea, P. Rangel-Rivera
Summary: The modification of montmorillonite with metallic species has a direct impact on its crystalline structure, texture, porosity, and surface. These modifications enable the creation of materials with varied characteristics to be used as catalysts and adsorbents. This study aimed to create an acid-base catalyst based on montmorillonite K10 modified with Ti, Ce, and Ni, and investigate their effects on the physicochemical properties of K10 Mnt and their contribution to catalytic esterification reactions. Characterization techniques such as SEM-EDS, XRD, FTIR, physisorption of N-2, and TGA-DTGA were employed. The catalysts were then tested for their catalytic esterification of acetic acid and penta-1-ol in the liquid phase.
CLAYS AND CLAY MINERALS
(2023)
Article
Chemistry, Applied
Jianyu Dong, Xiuling Chen, Fangyan Ji, Lixin Liu, Lebin Su, Min Mo, Jian-Sheng Tang, Yongbo Zhou
Summary: In the presence of copper salt and molecular oxygen, a simple and direct aerobic oxidative esterification reaction of arylacetonitriles with alcohols/phenols is achieved, resulting in a broad range of aryl carboxylic acid esters in good to high yields. Copper salt plays multiple roles in the transformation, facilitating the oxygenation of C-H bond, cleavage of inert C-C bond, and formation of C-O bond in one pot without the need for any additional acids, bases, ligands, etc. This reaction provides a simple, direct, and efficient method for synthesizing functionalized esters, especially aryl benzoates, from readily available starting materials.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Fabio Masero, Victor Mougel
Summary: The synthesis and characterization of a series of Mo(IV) bis-bdiketonate complexes and bistriflate complexes are reported. These complexes were characterized in solid and solution state using XRD and H-1 NMR spectroscopy. The bistriflate complexes were found to be highly active catalysts for allylic substitution reactions.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Fabio Masero, Victor Mougel
Summary: The synthesis and characterization of a series of Mo(IV) bis-beta-diketonate complexes, including (MoCl2)-Mo-R-Cl-IV and Mo-R(IV)(OTf)2, are reported. The complexes were characterized in solid and solution state using XRD and H-1 NMR spectroscopy. The bistriflate complexes were found to be highly active catalysts for allylic substitution reactions.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Zahra Besharati, Masoume Malmir, Majid M. Heravi
Summary: The novel natural-based Cu2O@Mont/EAS-IL catalyst efficiently synthesized benzopyranopyrimidines intermediates, showing advantages such as low usage, easy operation, recyclability, and environmental friendliness, demonstrating its potential in the above-mentioned reaction.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Alina Brzeczek-Szafran, Justyna Wieclawik, Natalia Barteczko, Anna Szelwicka, Emily Byrne, Anna Kolanowska, Malgorzata Swadzba Kwasny, Anna Chrobok
Summary: The dicationic and tricationic ionic liquids, synthesized by proton transfer from sulfuric acid and corresponding di- and triamines, show potential as Bronsted acidic catalysts in biodiesel production. These new ionic liquids are cost-effective and highly acidic, outperforming sulfuric acid and other catalysts in catalytic esterification reactions by absorbing water and phase-separating the ester. The interplay between acidity and physical properties, such as density and viscosity, enables easy phase separation of water from the ester, while substrate scope and recycling studies demonstrate their robustness and recyclability as catalysts.
Article
Chemistry, Physical
Ruiyi Wang, Kuan Lu, Jin Zhang, Xincheng Li, Zhanfeng Zheng
Summary: The study presents a nitrogen-doped porous carbon-encapsulated Au-doped Co nanoparticle catalyst with abundant and electron-rich Co-Nx sites in the outer carbon layer. The optimal catalyst shows improved catalytic performance in alcohol selective oxidative esterification with a yield of 99.9%. Au doping in the Co nanoparticle core increases the content and electron density of Co-Nx species on the outer carbon shell, enhancing the adsorption and activation of molecular O2 and generating reactive O2•-species.
Article
Engineering, Chemical
Xiantao Feng, Qiannan Wang, Mengyang Wang, Liang Liu
Summary: Three kinds of alkoxy group-functionalized acidic ionic liquids were studied, with one of them showing the best performance in reaction separation and maintaining catalytic activity after multiple recycling.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Tomohiro Ichitsuka, Takashi Makino, Takayuki Ishizaka
Summary: This study developed an ecofriendly method for the synthesis of N-arylamides using isopropenyl esters and heterogeneous acid catalysts, which enables the synthesis of various N-arylamides in high yields. The method has a wider substrate scope and allows for the obtainment of high-purity products.
Article
Chemistry, Physical
Maciej Trejda, Ada Kaszuba, Ardian Nurwita, Maria Ziolek
Summary: This study optimized the synthesis of catalysts based on acidic mesoporous silica of the SBA-15 type by immobilizing TPS under increased pressure up to 20 bar, leading to a material that was highly active and stable in liquid phase processes. The optimal pressure for modification was found to be 10 bar, resulting in the highest number of acidic sites, although the stability in gas-phase processes was unsatisfactory.
Review
Chemistry, Physical
Gopalpur Nagendrappa, Ravindra Reddy Chowreddy
Summary: Clays and modified or supported clays are widely used catalysts in organic reactions due to their easy structural modifications, low cost, eco-friendly nature, and ready availability. A survey of literature from 2011-2020 shows that biodiesel synthesis and wastewater treatment are widely investigated transformations in clay-catalyzed organic reactions and have practical applications.
CATALYSIS SURVEYS FROM ASIA
(2021)
Article
Chemistry, Multidisciplinary
Qiaowen Liu, Feng Han, Hongfeng Zhuang, Zenghong Song, Jian Zhang, Tong Zhang, Ning Wang, Chengxia Miao
Summary: In this study, a metal-free and recyclable catalytic system using pyrrolidine-based ionic liquids as catalysts for direct reduction of aromatic allylic alcohol was developed. The use of dimethyl carbonate as the solvent not only acted as a green solvent but also stabilized the reaction intermediates and improved the reactivities. The method showed high yield, scalability, and environmental friendliness.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Dipak S. Aher, Kiran R. Khillare, Laxmikant D. Chavan, Sunil G. Shankarwar
Summary: A highly reusable heterogeneous catalyst (PMo7W5/kaolin) was synthesized by impregnating tungsten-substituted molybdophosphoric acid onto acid-treated kaolin clay using the wetness impregnation method. The catalyst was characterized using various techniques and showed efficient catalytic activity in the synthesis of 3,4-dihydropyrimidin-2(1H)-ones via Biginelli reaction under solvent-free conditions. The 20% PMo7W5/kaolin catalyst exhibited significantly enhanced catalytic activity compared to other catalysts.
Article
Engineering, Chemical
L. L. Diaz-Munoz, H. E. Reynel-avila, D. I. Mendoza-Castillo, A. Bonilla-Petriciolet, J. Jauregui-Rincon
Summary: This study reports the preparation, evaluation, and comparison of alkaline and acidic heterogeneous carbon-based catalysts in the transesterification of safflower oil with methanol to obtain biodiesel. The catalyst prepared with potassium hydroxide and calcium nitrate showed the highest FAME formation and outperformed other catalysts even after four regeneration-reaction cycles. The best properties of an alkaline catalyst could be associated with its specific surface area and contents of potassium and calcium moieties.
INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Nikolai S. Li-Zhulanov, Irina V. Il'ina, Alexander Yu. Sidorenko, Dina V. Korchagina, Konstantin P. Volcho, Vladimir E. Agabekov, Nariman F. Salakhutdinov
Summary: In this study, a complex chiral cage heterocyclic compound containing two thiophene moieties was synthesized through heterogeneous catalysis. The structure of the compound was determined using 1D and 2D NMR experiments (HSQC, HMBC, COSY, NOESY) and HRMS.
MENDELEEV COMMUNICATIONS
(2022)
Article
Chemistry, Organic
Leila Zare Fekri, Marjan Farjood Feshalami
Summary: A practical and scalable synthetic method for the synthesis of new amides and pyridazinones has been established using readily accessible materials, without the need for harmful organic or inorganic reagents, with few reaction steps and high purity.
POLYCYCLIC AROMATIC COMPOUNDS
(2022)
Article
Biochemical Research Methods
Abdolrahman Keyhani, Mohammad Nikpassand, Leila Zare Fekri, Hassan Kefayati
Summary: This study reports a mild synthesis method for 2-aryl-quinazolin-4(1H)-ones derivatives from isatoic anhydride and Glycine using OImDSA as a catalyst. The method is characterized by its simplicity, low cost, environmental friendliness, and reusability.
COMBINATORIAL CHEMISTRY & HIGH THROUGHPUT SCREENING
(2022)
Article
Chemistry, Organic
Abdolrahman Keyhani, Mohammad Nikpassand, Leila Zare Fekri, Hassan Kefayati
Summary: Amino glucose-functionalized silica-coated NiFe2O4 nanoparticles (NiFe2O4@SP@GA) were successfully synthesized and used as catalysts for the synthesis of novel 2-aryl-quinazolinone compounds. The eco-friendly one-pot reaction resulted in high yields and short reaction times. The catalyst showed consistent activity even after six cycles of reuse.
POLYCYCLIC AROMATIC COMPOUNDS
(2022)
Article
Chemistry, Organic
Mohammad Nikpassand, Leila Zare Fekri, Parissa Naddaf Rahro
Summary: This study reported a novel, efficient and grind stone procedure for synthesizing pyrazolo[4,3-e]pyridine compounds at room temperature. This methodology offers advantages such as mild conditions, excellent yields, simple procedure, and reduced environmental consequences. The proposed mechanism of the reaction was also validated through theoretical studies.
POLYCYCLIC AROMATIC COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Abdolrahman Keyhani, Mohammad Nikpassand, Leila Zare Fekri, Hassan Kefayati
Summary: Tannic acid-functionalized silica-coated Fe3O4 nanoparticles were used to synthesize 2-aryl-quinazolinones in an eco-friendly manner, resulting in high yields and short reaction times. The catalyst showed good recyclability and the structures of the compounds were confirmed through various spectroscopic techniques.
JOURNAL OF CLUSTER SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Leila Zare Fekri, Leila Hassan Zadeh
Summary: Novel derivatives of bis dapsone derived dihydropyridines were successfully synthesized using Fe3O4@SiO2-Pr@L-proline magnetic nanoparticles as nanocatalyst, showing high antibacterial activities against both gram-negative and gram-positive bacteria.
RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Zeinab Jafarian, Mohammad Nikpassand, Afshin Pourahmad, Leila Zare Fekri
Summary: This study reported the synthesis of azo-linked acridine derivatives using Ag2S/RHA-MCM-41nanocomposite, showing high activity and desirable yields. The catalyst could be easily removed and reused, maintaining catalytic activity after five runs. The efficiency of the method was demonstrated by short reaction time and high yields of the products.
CURRENT ORGANIC SYNTHESIS
(2021)
Article
Chemistry, Multidisciplinary
Leila Zare Fekri, Leila Hassan Zadeh
Summary: The copper/dapsone cuvalented Fe3O4@SiO2-propyl nanocomposite is an effective and green catalyst for multicomponent reactions, showing no obvious decrease in efficiency after being recycled six times with magnetic recovery. The synthesis of dihydropyridines using this catalyst can be easily achieved with high yield and short reaction times.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2021)
Article
Chemistry, Organic
Leila Zare Fekri
ORGANIC PREPARATIONS AND PROCEDURES INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Leila Zare Fekri
Summary: A nanomagnetic dapsone-Cu supported on the silica-coated Fe3O4 (Fe3O4@SiO2-pr@dapsone-Cu) nanocomposite was synthesized and characterized for use as a green, efficient, and recyclable Lewis acid in the multicomponent synthesis of new derivatives. The synthesized compounds are new and confirmed by various analyses, with the catalyst showing magnetic recoverability and consistent efficiency after six runs.
FRONTIERS IN CHEMISTRY
(2021)
Review
Chemistry, Applied
Shohreh Zeinali, Leila Zare Fekri, Leila Hassan Zadeh
Summary: This review discusses the recent advances in the synthesis and applications of nanocatalysts for 1,3-thiazolidines, with a focus on green conditions. The reported approaches include both classical and nonclassical methods, showing the importance of nanotechnology in organic chemistry.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Engineering, Environmental
Maryam Haghighi, Leila Baghdadi Zare, Mina Ghiasi
Summary: Spirulina algae oil was analyzed for fatty acid composition using GC-MS, and a suitable catalyst for its transesterification with methanol, [Cu(H2PDC)(H2O)2], was synthesized and characterized using various techniques. The complex showed high conversion efficiency of 98.45% in producing biodiesel under specific reaction conditions, indicating its potential as an efficient catalyst for biodiesel production.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Mogharab Torabi, Leila Zare Fekri, Mohammad Nikpassand
Summary: A novel Fe3O4@Silicapropyl@vaniline-covalented isoniazide-copper(I) nanocomposite was successfully synthesized and applied as an efficient catalyst for the synthesis of acridines under solvent-free conditions via multi-component reaction. The nanocatalyst shows benefits such as high yields, short reaction time, eco-friendly aspects, and magnetic recoverability for multiple reuses.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Physical
Zeinab Jafarian, Mohammad Nikpassand, Afshin Pourahmad, Leila Zare Fekri
Summary: This study reported the synthesis of novel azo-linked acridines via the reaction of dimedone and synthesized diazoaryl-(2-amino-5-(phenyl)methanone using GO-ZnO nanocomposite. The results showed that GO-ZnO exhibited high activity in the reactions and was reusable.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Chemistry, Physical
Mohammad Nikpassand, Abdolrahman Keyhani, Leila Zare Fekri, Rajender S. Varma
Summary: An efficient, solvent-free, and environmentally benign route via mechanochemical means was described for the synthesis of azo-linked 2-amino-4H-chromene derivatives. The four-component reaction utilized a recyclable magnetic nano-catalyst, Fe3O4@SiO2@KIT-6-NH2@Schiff-base complex, and the synthesized compounds were characterized using various analytical techniques.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
