Article
Chemistry, Organic
Yang Liu, Mikael La Roch, Alessia Mori, Alexandre Pradal, Giovanni Poli, Julie Oble
Summary: The article introduces a Pd(II)-catalyzed [3+2] annulation strategy, which replaces α,β-unsaturated-γ-oxy carbonyls with β,γ-unsaturated carbonyl derivatives as bis-electrophiles. The study provides experimental optimization and demonstrates the synthetic versatility in forming diverse heterocyclic structures. This dehydrogenative strategy represents a more economical version than the previous redox-neutral couplings.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Tommaso Fantoni, Sara Bernardoni, Alexia Mattellone, Giulia Martelli, Lucia Ferrazzano, Paolo Cantelmi, Dario Corbisiero, Alessandra Tolomelli, Walter Cabri, Federica Vacondio, Francesca Ferlenghi, Marco Mor, Antonio Ricci
Summary: The use of N-hydroxyethylpyrrolidone (HEP)/water/N,N,N',N'-tetramethyl guanidine (TMG) as solvent/base mixture and sulfonated phosphine ligands in the Heck-Cassar and Sonogashira protocols allows for high yields and fast conversion under mild conditions, with the catalyst being recyclable without leakage or metal contamination.
Article
Chemistry, Inorganic & Nuclear
Le Li, Hongliang Xu, Qianyi Zhu, Xiangjun Meng, Jixing Xu, Meijun Han
Summary: This article presents a comprehensive review on the recent progress of interstitial hydrogen atom modified Pd-based nanocatalysts for energy-related electrocatalytic reactions. It discusses the synthesis strategies and mechanisms of Pd-based hydrides, and emphasizes the role of H intercalation in tailoring their physicochemical and electrochemical properties. The widespread application of Pd-based hydrides for electrocatalytic reactions and the future development of more efficient Pd-based hydrides are also discussed.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Physical
Zhe Yan, Linxia Cui, Ke Shi, Mingyuan Zhang, Zhe Pang, Jiuwen Guo, Rui Gao, Haigang Hao
Summary: Partial replacement of noble metal Pd or Ag with inexpensive metals Ni or Cu in AgPd catalyst can reduce cost and improve the conversion and selectivity of the hydrogenation reaction.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Sevval Efe, Carsten Schauerte, Klaus Merz
Summary: Crystallization under hydrothermal conditions is an interesting method to selectively influence crystallization pathways and processes. The crystallization of 3-cyanopyridine and glutaric acid from aqueous solutions under ambient conditions resulted in the formation of the 2:1 cocrystalline entity 1. Crystallizations under thermal and hydrothermal conditions, depending on the amounts of water used, led to the polymorphic forms 1 and 2 of the 2:1 cocrystalline entity of 3-cyanopyridine and glutaric acid, as well as the cocrystalline entity of nicotinamide and glutaric acid.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
Julia B. Curley, Nicholas E. Smith, Wesley H. Bernskoetter, Mehmed Z. Ertem, Nilay Hazari, Brandon Q. Mercado, Tanya M. Townsend, Xiaoping Wang
Summary: The iron pincer complex ((PNP)-P-iPr)Fe(H)(CO) is an active catalyst, but rapid decomposition limits its performance. Analysis suggests that catalytic intermediates may decompose via a bimolecular pathway, leading to the formation of dimeric species. The study provides strategies for improving catalysis and enhancing the performance of the catalyst in formic acid dehydrogenation.
Article
Chemistry, Multidisciplinary
Yong-Qing Yan, Zhao Wei, Zhao Wang, Yao Li, Wei-Hao Wang, Bo Jiang, Bao-Lian Su
Summary: A tree-like Pd dendrites array decorated Pd membrane was used as the core device in an electrochemistry assisted gas-fed membrane reactor for butadiene semi-hydrogenation. The hydrogen atomic sieving effect of the Pd-based membrane under electrochemical condition plays a key role in the high catalytic activity. The nanostructured Pd membrane significantly enhances the catalytic performance with a 14 times higher butadiene conversion rate and 98% butenes selectivity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Estela Ruiz-Lopez, Maria Ribota Pelaez, Maria Blasco Ruz, Maria Isabel Dominguez Leal, Marcela Martinez Tejada, Svetlana Ivanova, Miguel angel Centeno
Summary: Formic acid is an excellent hydrogen carrier and there is growing interest in the development of efficient and selective catalysts for its dehydrogenation. This study investigated heterogeneous catalysts based on mono- or bimetallic Pd/Ru for formic acid dehydrogenation reactions in both liquid- and vapor-phase conditions. The catalysts exhibited good catalytic activity and selectivity towards the dehydrogenation reaction, preventing the formation of undesired CO.
Article
Polymer Science
Laura Riva, Gloria Nicastro, Mingchong Liu, Chiara Battocchio, Carlo Punta, Alessandro Sacchetti
Summary: This article highlights the importance of designing and synthesizing durable heterogeneous catalysts from renewable sources derived from biomass waste. It presents an efficient method for loading Pd(II) ions on a cellulose-based organic support, as well as the application and recycling performance of this support in Suzuki-Miyaura coupling reactions.
Article
Chemistry, Multidisciplinary
Philipp Schmid, Gasper Jost, Xaver Grass, Didier Touraud, Olivier Diat, Arno Pfitzner, Pierre Bauduin
Summary: In recent years, photoredox chemistry has been extensively studied for its sustainability and low energy consumption. This study introduces a concept called {2-phases 2-reactions 1-catalyst}, which allows two chemical reactions to be performed simultaneously with only one catalyst in a liquid-liquid biphasic system. The concept demonstrates a powerful and sustainable approach to coupling diverse photo-oxidation/reduction reactions, with the advantage of using one reactor and one catalyst.
Article
Polymer Science
Tilun Shan, Huiguang Bian, Donglin Zhu, Kongshuo Wang, Chuansheng Wang, Xiaolong Tian
Summary: This paper conducted a mechanistic and experimental study on the replacement of some carbon blacks by spent FCC catalysts for the preparation of rubber products and explored the synergistic reinforcing effect of spent catalysts and carbon blacks, providing theoretical support for the efficient reuse of spent catalysts and reducing environmental pollution.
Article
Chemistry, Inorganic & Nuclear
Kaan Karaoglu, Zehra Ozcifci, Melike Caliskan, Hakki Turker Akcay, Talat Baran
Summary: In this study, a ZnO-Pd nanocatalyst was prepared on activated carbon sourced from polymer debris for use in Heck-type coupling reactions. The hybrid material was characterized using techniques such as TEM, XRD, and BET surface area analysis. The designed hybrid catalyst exhibited a reaction yield of more than 90% in cross-coupling reactions and demonstrated remarkable stability up to 5 cycles in recycling tests.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Robert Bavisotto, Sree Pradipta Roy, Nicholas Hopper, Wilfred T. Tysoe
Summary: We investigated the influence of hydrogen pressure on the selectivity of furfural hydrogenation on palladium. Our findings show that at low hydrogen pressures, decarbonylation products are formed, while at higher pressures, 2-methyl furan is produced. This change in selectivity is attributed to the effect of co-adsorbed hydrogen on the orientation of furfural adsorbed on the surface. The results obtained from studying the hydrogenation of furfural on a Pd(111) single crystal support this postulate.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Applied
Hua-Wei Liu, Yong-Jiu Hao, Zhong-Jian Cai, Shun-Jun Ji
Summary: This article describes a copper-catalyzed photoinduced [3+3] cycloaddition reaction of α-acidic isocyanides with 2,5-diaryltetrazoles. The reaction proceeded smoothly with high regioselectivity, affording a range of important 1,2,4-triazines under mild conditions. The obtained 1,2,4-triazines were easily converted into triazine alcohol, Weinreb amide, and triazinone, demonstrating the utility of this [3+3] cycloaddition process.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Mar Rios-Gutierrez, Luis R. Domingo, Radomir Jasinski
Summary: The experimental reactivity of isomeric (Z)- and (E)-beta-nitrostyrenes in [3+2] cycloaddition reactions was analyzed using molecular electron density theory (MEDT) at different computational levels. The study found differences in reaction mechanisms, stereoselectivity and reactivity between the two isomers, with (Z)-beta-nitrostyrene showing higher reactivity and selectivity in the reactions.
