Article
Chemistry, Physical
Xue Liu, Xinyi Li, Long Liu, Tianzeng Huang, Wenhao Chen, Michal Szostak, Tieqiao Chen
Summary: The direct acyl Sonogashira cross-coupling of carboxylic acids with terminal alkynes has been achieved through Pd/Cu cooperative catalysis, offering a method to prepare ynones directly from carboxylic acids. The reaction shows high chemoselectivity, functional group tolerance, and good to high yields of ynones. It has synthetic value in organic synthesis, demonstrated by late-stage modification of bioactive molecules and gram-scale experiments.
Article
Chemistry, Organic
Wen-Shuai Chen, Fang Yang, Ting Wang, Gang-Qiong Zhang, Yi Wei, Mo-Han Wang, Zi-Sheng Chen, Kegong Ji
Summary: An efficient and chemoselective method for the transformation of β-amidoyne to 3-acyl-substituted quinolones 2 and 3-H-quinolones 4 has been developed. The reaction involves the selective C=O bond cleavage, 1,5-O migration, and C=C bond recombination process of β-cyclic amidoyne, leading to the selective formation of quinolones 2. This practical approach provides a viable alternative for the synthesis of various quinolones.
Article
Chemistry, Organic
Siya Le, Yihui Bai, Jiayan Qiu, Zuxiao Zhang, Hanliang Zheng, Gangguo Zhu
Summary: A Cu-catalyzed 5-endo-selective trifluoromethylcarbocyclization of ynones has been developed for the concise synthesis of trifluoromethylated cyclopentenones. The pivotal roles of carbonyl groups in the reaction have been well illustrated by experiments and density functional theory calculations.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Organic
Jiayan Qiu, Siya Le, Jingwen Su, Yi Liu, Yulu Zhou, Hanliang Zheng, Yihui Bai, Gangguo Zhu
Summary: A visible light induced reductive alkyltrifluoromethylation method for the synthesis of highly functionalized trifluoromethylated cyclopentanones has been developed.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Organic
Ya-Fang Ye, Feng Li, Jia-Le Chen, Zi-Qian An, Gui-Ying Zhang, Yan-Bo Wang
Summary: A facile and effective tandem reaction of ynones and methyl salicylates has been developed to obtain a broad range of 3-acyl chromones in moderate-to-excellent yields. This reaction protocol involves a Michael addition and cyclization process, allowing for easily accessible substrates, broad substrate scope, and high regioselectivity under mild and transition-metal-free conditions. Furthermore, gram-scale reaction and further chemical transformations of the products have been investigated.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Youka Bunno, Yuta Tsukimawashi, Masahiro Kojima, Tatsuhiko Yoshino, Shigeki Matsunaga
Summary: Metal-containing Schiff base/sulfoxides were developed as chiral ligands for Pd(II)-catalyzed asymmetric intramolecular allylic C-H amination reactions, showing good performance in tuning the selectivity and reactivity of the Pd(II)-catalyst with high product yields.
Article
Chemistry, Organic
Haichao Huang, Hailong Wang, Chao Gong, Zhenjing Zhuang, Wenmin Feng, Si-Hai Wu, Lianhui Wang
Summary: The regioselective redox-neutral [3 + 3]-cycloaddition of anilines with CF3-ynones was achieved using a traceless directing group strategy catalyzed by rhodium. A variety of substituted 2-trifluromethylquinoline compounds were obtained in good to excellent yields, exhibiting favorable blue emission properties.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Organic
Peizhi Bai, Yubo Jiang, Tiebo Xiao, Guiping Qin
Summary: A Pd-catalyzed cascade reaction has been reported for the efficient construction of stereodefined skipped trienes under mild reaction conditions in a single-step. The reaction tolerates a variety of functional groups and provides substituted stereodefined skipped trienes in moderate to good yields. Preliminary mechanism investigations suggest that the Sonogashira reaction and radical pathway may not be involved in this novel multicomponent coupling reaction.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Rajshekhar A. Unhale, Milon M. Sadhu, Vinod K. Singh
Summary: A novel organocatalytic asymmetric formal [3 + 2] cycloaddition has been developed for the synthesis of biologically relevant chiral spiroisoindolinone-indolines with excellent yields and enantioselectivity under mild conditions.
Article
Chemistry, Applied
Pavel A. A. Volkov, Kseniya O. O. Khrapova, Anton A. A. Telezhkin, Ivan A. A. Bidusenko, Elena Yu. Schmidt, Alexander I. I. Albanov, Boris A. A. Trofimov
Summary: The cross-coupling of propargylamines with aromatic acyl chlorides (PdCl2, CuI, Ph3P, 40-45 degrees C) catalyzed by Pd/Cu provides alpha-aryl(hetaryl)aminoacetylenic ketones with a yield of up to 97%. The resulting products can be further cyclized to 1,2,5-triaryl(hetaryl)-1,2-dihydro-3H-pyrrol-3-ones with a yield of up to 93% after treatment with KOH or Et2NH (40-55 degrees C, aqueous ethanol). Furthermore, a one-pot synthesis of the pyrrol-3-ones (up to 62% yields) has been developed by consecutive treatment of the propargylamines with acyl chlorides (PdCl2/CuI/Ph3P) and a base (KOH) in aqueous ethanol.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Physical
Alireza Oveisi Keikha, Hassan Mansouri-Torshizi, Somaye Shahraki, Effat Dehghanian
Summary: The synthesis of compounds that interfere with multiple targets is crucial in the fields of biology and pharmaceuticals. A newly synthesized Schiff base ligand and its complexes showed good biological activities, antioxidant capacity, and inhibition of bovine liver catalase activity.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Lixin Liu, Jianyu Dong, Zuqi Fu, Lebin Su, Shaofeng Wu, Qian Shang, Shuang-Feng Yin, Yongbo Zhou
Summary: In this study, a specific cross-dimerization of terminal alkynes is developed under Pd/TMEDA catalysis, which produces a series of gem-1,3-enynes with different functional group tolerance in moderate to high yields. The reaction features anti-addition-carbometallation, easy control of selectivity, wide range of donor alkynes, and simple catalytic conditions.
SCIENCE CHINA-CHEMISTRY
(2022)
Article
Chemistry, Organic
Wenlong Ren, Mingzhou Wang, Jianqiong Guo, Jintao Zhou, Jianxiao Chu, Yuan Shi, Yian Shi
Summary: A regioselective Pd-catalyzed hydrocarboxylation of terminal olefins with HCOOH is described. A wide variety of branched carboxylic acids can be obtained easily under mild reaction conditions with high regioselectivities. The operation of the reaction is simple and does not require handling toxic CO. The ligand and LiCl play important roles in reaction reactivity and selectivity.
Article
Nanoscience & Nanotechnology
Kuiyuan Wang, Kai Chen, Timothy J. Prior, Xing Feng, Carl Redshaw
Summary: The study synthesized new double-layer Schiff base macrocycles using aldehydes, and found that one compound immobilized Pd with excellent peroxidase-like catalytic activity, exhibited outstanding bactericidal activity against Escherichia coli and Staphylococcus aureus, and showed biosafety in cytotoxicity measurements. These findings have potential to guide innovation in Pd-based composites as enzyme mimetics and antibacterial materials.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Applied
Sundar Nandhini, Sivadasan Dharani, Chennakrishnan Elamathi, Frederic Dallemer, Rathinasabapathi Prabhakaran
Summary: A tetranuclear palladium(II) complex was synthesized and characterized, showing unexpected results in the reaction between phenylboronic acid and chloroquinoline derivatives. The complex exhibited different reactivity towards different substrates.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Saeed Rayati, Elham Khodaei, Saeedeh Shokoohi, Majid Jafarian, Bahareh Elmi, Andrzej Wojtczak
INORGANICA CHIMICA ACTA
(2017)
Article
Chemistry, Inorganic & Nuclear
Saeed Rayati, Elham Khodaei, Majid Jafarian, Arezo Bahrami, Andrzej Wojtczak, Anna Kozakiewicz
JOURNAL OF COORDINATION CHEMISTRY
(2017)
Article
Chemistry, Inorganic & Nuclear
Saeed Rayati, Elham Khodaei, Majid Jafarian
JOURNAL OF COORDINATION CHEMISTRY
(2017)
Article
Chemistry, Multidisciplinary
Saeed Rayati, Fatemeh Nejabat
NEW JOURNAL OF CHEMISTRY
(2017)
Article
Chemistry, Multidisciplinary
Saeed Rayati, Saghar Rezaie, Fatemeh Nejabat
COMPTES RENDUS CHIMIE
(2018)
Article
Chemistry, Multidisciplinary
Saeed Rayati, Parinaz Nafarieh, Mostafa M. Amini
NEW JOURNAL OF CHEMISTRY
(2018)
Article
Biochemistry & Molecular Biology
Fouad Mehraban, Arefeh Seyedarabi, Zahra Seraj, Shahin Ahmadian, Najmeh Poursasan, Saeed Rayati, Ali Akbar Moosavi-Movahedi
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2018)
Article
Chemistry, Applied
Hassan Zakeri, Saeed Rayati, Goldasteh Zarei
APPLIED ORGANOMETALLIC CHEMISTRY
(2018)
Article
Chemistry, Multidisciplinary
Fatemeh Nejabat, Saeed Rayati
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2019)
Article
Chemistry, Applied
Saeed Rayati, Parinaz Nafarieh
APPLIED ORGANOMETALLIC CHEMISTRY
(2019)
Article
Biochemistry & Molecular Biology
Arefeh Seyedarabi, Shohreh Ariaeenejad, Ali A. Moosavi-Movahedi, Saeed Rayati, Najmeh Poursasan, Neda Asiaie, Zahra Seraj, Fouad Mehraban, Seyed E. Seyedarabi
BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS
(2019)
Article
Chemistry, Physical
Saeed Rayati, Fatemeh Nejabat, Fatemeh Panjiali
CATALYSIS COMMUNICATIONS
(2019)
Article
Chemistry, Inorganic & Nuclear
Saeed Rayati, Saghar Rezaie, Fatemeh Nejabat
JOURNAL OF COORDINATION CHEMISTRY
(2019)
Article
Chemistry, Inorganic & Nuclear
Saeed Rayati, Niloofar Pournaser, Fatemeh Nejabat, Parinaz Nafarieh
INORGANIC CHEMISTRY COMMUNICATIONS
(2019)
Article
Chemistry, Multidisciplinary
Saeed Rayati, Fatemeh Nejabat
COMPTES RENDUS CHIMIE
(2017)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)