Article
Chemistry, Applied
Eliana Nope, Angel G. Sathicq, Jose J. Martinez, Hugo Rojas, Gustavo Romanelli
Summary: This study successfully utilized layered double hydroxides to facilitate the multicomponent synthesis of uracil derivatives under green chemistry conditions, achieving high yields. Consideration of weak basic sites and solvent-free conditions during the reaction process played a significant role in the reaction efficiency.
Article
Chemistry, Multidisciplinary
Sailesh Chettri, Sumiran Tamang, Kiran Pradhan, Biswajit Sinha, Dhiraj Brahman
Summary: A green, efficient, and straightforward method for the synthesis of 2,4,5-triarylimidazole has been developed using unconventional CuB4O7 as a promoter under solvent-free conditions. This approach enables the synthesis of a library of 2,4,5-triarylimidazole compounds. Additionally, the in situ isolation of compounds (5) and (6) provides insight into the direct conversion of CuB4O7 into copper acetate in the presence of NH4OAc under solvent-free conditions. The main advantages of this protocol include easy reaction procedure, short reaction time, and easy work up of the product without the need for tedious separation methods.
Article
Nanoscience & Nanotechnology
Zhongwen Dong, Chuanyu Yang, Dongpu Zhao, Yanan Wang, Weifeng Chu, Zhaochi Feng, Xiangxue Zhu, Wenjie Xin, Yongchen Shang, Shenglin Liu, Longya Xu
Summary: A new interzeolite transformation method has been developed for the quick synthesis of nanoaggregate catalyst CDM-5, where the formation process of ordered aluminosilicate aggregate species was revealed through UV-Raman spectra and HRTEM, SEM images.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Nuwan Pannilawithana, Mina Son, Donghun Hwang, Mu-Hyun Baik, Chae S. Yi
Summary: The tetranuclear Ru-H complex [(PCy3)(CO)RuH](4)(O)(OH)(2) (1) generated in situ has been found to mediate a multicomponent deaminative coupling reaction of phenols with aldehydes and enamines to form xanthene products. The reaction of phenols with 2-hydroxybenzaldehydes and cyclic enamines resulted in the formation of tricyclic 1,3-dioxacin derivatives, while the reaction with triethylamine selectively formed bicyclic 1,5-dioxacyclic derivatives. The mechanistic pathways for the formation of xanthene products involving C-O bond cleavage steps were established through density functional theory (DFT) calculations.
Article
Chemistry, Applied
Tahereh Nasiriani, Mohammad Taghi Nazeri, Ahmad Shaabani
Summary: Due to its porosity, high hydrothermal and mechanical stability, SBA-15 has attracted significant attention from researchers for catalytic systems design. In this work, SBA-15 was used as an eco-friendly support for the synthesis of an effective heterogeneous catalytic nanocomposite based on metallophthalocyanines. The modified SBA-15 showed improved catalytic properties in the CO2 fixation reaction.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Engineering, Chemical
Chijin Zhang, Kay Lup Andrew Ng, Lixia Yan, Xiang Feng, Binbo Jiang, Zuwei Liao, Jingdai Wang, Yongrong Yang
Summary: The study found that olefin cofeeding during the MTP reaction can significantly increase propylene yield, and recommends using a temperature of 480 degrees Celsius for the HZSM-5 catalyzed MTP process.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Y. Shi, W. Gao, G. Wang, J. Fan, C. Wang, F. Wang, Y. He, X. Guo, S. Yasuda, G. Yang, N. Tsubaki
Summary: An efficient bifunctional ZnCr2O4-ZSM-22 catalyst was developed for direct conversion of CO2 to ethylene, achieving 24.0% ethylene selectivity and 21.9% CO2 conversion. The catalyst exhibited a high ethylene/light olefin ratio of over 93% and demonstrated superior stability with no significant deactivation over 60 hours. The study systematically investigated the effects of various factors on the catalytic performances, providing a new avenue for CO2 conversion to ethylene.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Physical
Giovanna Bosica, Riccardo De Nittis, Ryan Borg
Summary: An efficient and environmentally benign one-pot condensation reaction was achieved using 1,4-diazabicyclo[2-2-2]octane supported on Amberlyst-15 as a novel catalyst. The reaction involved cyclic diketones, aldehydes, and naphthols, resulting in the synthesis of various benzoxanthenones with good to excellent yields. The advantages of this reaction include the use of a heterogeneous catalyst, solventless conditions, atom-economical methodology, and low E-factor values. Seventeen xanthene derivatives, including two novel molecules, were synthesized and characterized. Aromatic aldehydes with electron-withdrawing groups showed excellent yields, and aliphatic aldehydes also gave appreciable results. The catalyst exhibited full recyclability and could be reused up to six times.
Article
Chemistry, Organic
Mohinuddin Khan Imon, Readul Islam, Pran G. Karmaker, Pijush K. Roy, Kee-In Lee, Harendra N. Roy
Summary: A green and efficient method for synthesizing biologically active xanthene derivatives has been developed using a three-component reaction mediated by 2-aminophenol. The method offers advantages such as short reaction time, easy product isolation, non-toxic catalyst, and metal-free process.
SYNTHETIC COMMUNICATIONS
(2022)
Article
Environmental Sciences
Leilei Dai, Nan Zhou, Hui Li, Yunpu Wang, Yuhuan Liu, Kirk Cobb, Yanling Cheng, Hanwu Lei, Paul Chen, Roger Ruan
Summary: By utilizing relay catalysis with Al2O3 and ZSM-5 zeolite, the catalytic fast pyrolysis of LDPE can efficiently produce high value naphtha. Under optimized conditions, the selectivity of monoaromatics and C-5-C-12 alkanes/olefins can reach up to 100% in the product.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Biotechnology & Applied Microbiology
Ifeanyi Michael Smarte Anekwe, Yusuf Makarfi Isa, Bilainu Oboirien
Summary: Bioethanol, derived from biomass resources, is increasingly used as a base material for the synthesis of petrochemicals and fuel. This article provides a comprehensive review of the catalytic conversion of bioethanol into hydrocarbons, such as olefins and gasoline. It also highlights the need for further research to address challenges and enhance bioethanol conversion for improved biofuel and chemical production.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Analytical
Jadranka Milikic, Srna Stojanovic, Ljiljana Damjanovic-Vasilic, Rastko Vasilic, Lazar Rakocevic, Slavica Lazarevic, Biljana Sljukic
Summary: The study found that calcined forms of ZSM-5 and beta zeolites can be used as better electrocatalysts for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) due to more active sites and decreased charge-transfer resistance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Faranak Manteghi, Fatemeh Zakeri, Owen James Guy, Zari Tehrani
Summary: A chromium-containing metal-organic framework MIL-101 was effectively used as a heterogeneous catalyst for the solvent-free synthesis of 2,4,5-trisubstituted imidazoles, showing advantages such as high efficiency, reusability, and ease of isolation. The catalytic reaction achieved a high yield in a short time, making it a promising alternative to other catalysts.
Article
Chemistry, Physical
Sudarshan S. Dipake, Sachin P. Gadekar, Premkumar B. Thombre, Machhindra K. Lande, Anjali S. Rajbhoj, Suresh T. Gaikwad
Summary: Efficient and reusable ZS-1 zeolite catalyst was synthesized using the hydrothermal method, providing a facile approach for the synthesis of various substituted 1-amidoalkyl-2-naphthols. The catalyst offers advantages such as shorter reaction times, operational simplicity, and excellent recyclability.
Article
Chemistry, Organic
Jia-Yan Liu, Lan Peng, Meng-Fei Li, Ming Wei, Sai Chen, Dong-Sheng Chen
Summary: A one-pot condensation reaction of 1H-indazol-6-amine, isatin, and barbituric acid or 2-thiobarbituric acid in refluxing ethanol, in the presence of L-proline, efficiently synthesizes novel spiro[indoline-3,11'-pyrazolo[3,4-f]pyrimido[4,5-b]quinoline] derivatives. This method offers simplicity in operation, high product yield, and straightforward experimental and work-up procedures. The structures of all synthesized compounds were confirmed using IR, H-1 NMR, C-13 NMR, F-19 NMR, and HRMS analysis.
JOURNAL OF HETEROCYCLIC CHEMISTRY
(2023)
