Article
Chemistry, Inorganic & Nuclear
Dnyaneshwar Sanap, Lata Avhad, Suresh Ghotekar, Nitin D. Gaikwad
Summary: This study focuses on the synthesis of C3-arylindeneoxindoles derivative compounds using calcite nanoflowers as a heterogeneous catalyst. The CaCO3 NFs prepared by thermal decomposition method show high catalytic activity in the Knoevenagel condensation reaction between 2-oxindole and aromatic aldehyde.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Fancheng Meng, Shuai Bi, Zuobang Sun, Dongqing Wu, Fan Zhang
Summary: A concise approach to vinylene-linked covalent organic frameworks was established by conducting Knoevenagel condensation at the multi-methyl groups of a pyridine ring. Using this method, two highly crystalline COFs with large specific surface areas were constructed. The stable and abundant pyridine-decorated nanochannels within the COFs exhibited excellent catalytic performance in the esterification of pharmaceutical intermediates with high selectivity and recyclability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Nitish Deshpande, Jee-Yee Chen, Takeshi Kobayashi, Eun Hyun Cho, Hannah Pineault, Li -Chiang Lin, Nicholas A. Brunelli
Summary: This study investigates the impact of micropores on the catalytic activity of aminosilica materials. By comparing materials with micropores and materials with negligible micropore volume, it is found that the materials with negligible micropore volume exhibit higher catalytic activity in a range of reactions.
JOURNAL OF CATALYSIS
(2022)
Article
Engineering, Environmental
Xiaoqing Yuan, Ju Liu, Yanlei Wang, Xingming Jie, Jingyu Qin, Hongyan He
Summary: In this study, a novel dual-responsive emulsion reactor was prepared for the Knoevenagel condensation reaction, using temperature and CO2-responsive ionic liquids as an emulsifier, responder, and catalyst. The emulsion reactor underwent reversible transformations between emulsification and demulsification driven by temperature or CO2, allowing efficient catalytic reactions and easy separation of products and catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Hongyuan Fu, Ming Zhang, Youdi Zhang, Qingyuan Wang, Zheng'ao Xu, Qiuju Zhou, Zhengkai Li, Yang Bai, Yongfang Li, Zhi-Guo Zhang
Summary: In this study, a simple and cost-effective solution to the challenge of synthesizing giant molecule acceptors (GMAs) for stable polymer solar cells was presented. The Lewis acid-catalyzed Knoevenagel condensation with boron trifluoride etherate (BF3 center dot OEt2) as catalyst allowed for the efficient synthesis of GMAs, resulting in a high device efficiency of over 18%.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Organic
Shivani Arora, Surya Pratap Singh, Parashuram Sharma, Anand Singh
Summary: PTSA-catalyzed reactions using ketene dithioacetals as starting materials enable the efficient synthesis of 3-aryl coumarins and indenes. These reactions proceed under mild conditions without the need for transition metals or oxidants.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Qianqian Liang, Hua Cheng, Chengwen Li, Liangmin Ning, Liming Shao
Summary: This research successfully synthesized a novel Zirconium-based MOF with di-alkyne tag, and based on this, introduced a gentle post-synthesis modification strategy for diverse metals. The di-alkyne tagged MOF showed remarkable catalytic performance in Knoevenagel reaction, indicating great potential for practical applications in forming C-C bonds.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Applied
Ghobad Mansouri, Mino Abdizad, Amir Reza Abbasi, Sobhan Rezayati
Summary: Metal-organic frameworks (MOFs) Mlam-NH-66-UiO and EtA-NH-66-UiO were prepared via post-synthesis and exhibited excellent catalytic activity in water, with the ability to be recycled and reused without decomposition of the MOF structure.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Samahe Sadjadi, Neda Abedian-Dehaghani, Abolfazl Heydari, Majid M. Heravi
Summary: A novel bi-functional catalytic composite using cyclodextrin and chitosan was designed, incorporating metal-organic framework encapsulated phosphomolybdic acid in a dual chitosan-cyclodextrin nanosponge bead. The composite demonstrated high catalytic activity in alcohol oxidation and cascade alcohol oxidation-Knoevenagel condensation reaction, with good yields and the ability to be recycled multiple times. The synergy between the components, amino groups acting as catalysts and cyclodextrin nanosponge as a phase transfer agent, contributed to the superior performance of the catalyst.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Inorganic & Nuclear
Marieme Kacem, Mustapha Dib
Summary: Metal-organic frameworks (MOFs) are a widely used family of nanostructured materials that have been extensively researched in various fields. Recently, there has been a growing interest in using MOFs as heterogeneous catalysts for the synthesis of organic molecules, particularly in the context of Knoevenagel condensation.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Song Yang, Ai-Ling Lu, Le-Yao Wang, Xu-Sheng Yang, Wei-You Zhou, Yu-Peng Liu, Ming-Yang He, Qun Chen, Zhi-Hui Zhang
Summary: In this study, a series of zinc-based Metal-Organic Frameworks (MOFs) with unique structures and robust active sites have been synthesized. These catalysts can efficiently promote Knoevenagel condensation reactions of aldehydes with malononitrile or cyanoacetate under mild conditions in eco-friendly solvent media, achieving high yields with excellent recyclability.
INORGANICA CHIMICA ACTA
(2022)
Article
Chemistry, Physical
Hua Cheng, Liangmin Ning, Shengyun Liao, Wei Li, Siyuan Tang, Jilin Li, Huixin Chen, Xin Liu, Liming Shao
Summary: In this study, a nickel catalyst based on alkynyl-tagged UiO-66-alkyne was prepared, which showed highly dispersed and efficient catalytic activity. The use of UiO-66-alkyne-Ni enabled rapid catalysis of the Knoevenagel condensation reaction and exhibited superior recovery rates, suggesting its potential for industrial applications.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Chemistry, Physical
Mahdieh Chegeni, Mozhgan Mehri
Summary: Cu-PT-P composite was synthesized as a catalyst by cross-linking reaction and using bio-based materials. The composite exhibited high catalytic activity and stability in Knoevenagel condensation reaction, and it showed good catalytic performance for various compounds and could be recycled.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Multidisciplinary
Baijie Xu, Ruikun Zhao, Zhen Jing, Xinyi Ma, Hui Zhao, Pengtao Ma, Jingping Wang, Jingyang Niu
Summary: Three isomorphic polytungstates have been synthesized and demonstrated excellent catalytic activities in the Knoevenagel condensation reaction. Among them, catalyst 1 showed the highest reactivity, achieving a high reaction yield and TON value.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Ruidong Gao, Guang Zhang, Fanli Lu, Long Chen, Yang Li
Summary: In this study, two new pyrrole-based CMPs with large specific surface areas and good stabilities were successfully prepared by one-step oxidative self-polycondensation. Both CMPs exhibited high catalytic activity towards Knoevenagel condensation reaction, attributed to the inherent pore channels, high specific surface areas, and abundant nitrogen sites within CMPs. Additionally, both CMPs displayed excellent recyclability with negligible degradation after 10 cycles, providing new possibilities for designing novel nitrogen-rich high-performance heterogeneous catalysts.
FRONTIERS IN CHEMISTRY
(2021)
