Results 31 to 40 of about 27,892 (233)

Electrocyclizations of Conjugated Azapolyenes Produced in Reactions of Azaheterocycles with Metal Carbenes

Organics, 2021
Conjugated azapolyenes (azabuta-1,3-dienes, aza-/diaza-/oxaza-/oxadiazahexa-1,3,5-trienes) are highly reactive in electrocyclization reactions, which makes them convenient precursors for the synthesis of a wide range of four-, five-, and six-membered ...
Nikolai V. Rostovskii, Mikhail S. Novikov, Alexander F. Khlebnikov   +2 more
doaj   +1 more source

Revisiting the Chemistry of Vinylpyrazoles: Properties, Synthesis, and Reactivity

Molecules, 2022
Vinylpyrazoles, also known as pyrazolyl olefins, are interesting motifs in organic chemistry but have been overlooked. This review describes the properties and synthetic routes of vinylpyrazoles and highlights their versatility as building blocks for the
Vera L. M. Silva, Artur M. S. Silva
doaj   +1 more source

Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst

Advanced Functional Materials, EarlyView.
This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu, Hao Wu, Hoi Ying Chung, Yun Hau Ng   +3 more
wiley   +1 more source

Dual‐Responsive Phosphorus‐Based Fluorescent Sensors: Synthesis and Selective Metal Sensing of Pyrazolyl Phosphine Oxides

Angewandte Chemie, EarlyView.
Pyrazolyl phosphine oxides are shown to act as dual‐responsive fluorescent sensors, displaying a selective “turn‐off” fluorescence response for Fe3+ and a “turn‐on” response for Al3+. These systems serve as a new framework in the field of sensing materials based on main‐group elements such as phosphorus. Abstract Despite a wealth of previously reported
Ethan D. E. Calder, Isobel R. J. Hawes, Andrew R. Jupp   +2 more
wiley   +2 more sources

Nano-ZnO Catalyzed Green and Efficient One-Pot Four-Component Synthesis of Pyranopyrazoles

Journal of Chemistry, 2013
An efficient zinc oxide nanoparticle catalyzed one-pot, four-component synthesis of 6-amino-3-methyl-5-cyano-4-aryl-1,4-dihydropyrano[2,3-c]pyrazoles from aromatic aldehyde, malononitrile, ethyl acetoacetate, and hydrazine hydrate in aqueous medium is ...
Sunil U. Tekale, Sushma S. Kauthale, Kavita M. Jadhav, Rajendra P. Pawar   +3 more
doaj   +1 more source

Ambient‐Dried MOF/Cellulose‐Based Aerogels for Atmospheric Water Harvesting and Sustainable Water Management in Agriculture

Advanced Functional Materials, EarlyView.
Ambient‐dried composite aerogels integrating MOF‐303, TEMPO‐oxidized cellulose nanofibers (TOCNF), and hygroscopic salts enable high‐performance atmospheric water harvesting (AWH), achieving competitive uptake at both low and high humidity. Enhanced with a solar‐evaporation layer, these scalable aerogels support self‐sustained plant growth in a ...
Ahmadreza Ghaffarkhah, Mahyar Panahi‐Sarmad, Sara Rostami, Orysia Zaremba, Lukas Alexander Bauman, Seyyed Alireza Hashemi, Subhajit Dutta, Pu Yang, Tianyu Guo, Feng Jiang, Stefan Wuttke, Mohammad Arjmand, Orlando J. Rojas   +12 more
wiley   +1 more source

Synthesis of Chromone-Related Pyrazole Compounds

Molecules, 2017
Chromones, six-membered oxygen heterocycles, and pyrazoles, five-membered two-adjacentnitrogen- containing heterocycles, represent two important classes of biologically active compounds.
Clementina M. M. Santos, Vera L. M. Silva, Artur M. S. Silva   +2 more
doaj   +1 more source

Computational Modeling of Reticular Materials: The Past, the Present, and the Future

Advanced Materials, EarlyView.
Reticular materials are advanced materials with applications in emerging technologies. A thorough understanding of material properties at operating conditions is critical to accelerate the deployment at an industrial scale. Herein, the status of computational modeling of reticular materials is reviewed, supplemented with topical examples highlighting ...
Wim Temmerman, Ruben Goeminne, Kuber Singh Rawat, Veronique Van Speybroeck   +3 more
wiley   +1 more source

The Pharmaceutical Industry in 2019. An Analysis of FDA Drug Approvals from the Perspective of Molecules

Molecules, 2020
During 2019, the US Food and Drug Administration (FDA) approved 48 new drugs (38 New Chemical Entities and 10 Biologics). Although this figure is slightly lower than that registered in 2018 (59 divided between 42 New Chemical Entities and 17 Biologics ...
Beatriz G. de la Torre, Fernando Albericio   +1 more
doaj   +1 more source

Supramolecular Chemistry in Metal–Organic Framework Materials

Advanced Materials, EarlyView.
This review highlights synergies between reticular chemistry and supramolecular chemistry. The role of supramolecular interactions in determining framework…guest interactions and attempts to understand dynamic behavior in metal–organic frameworks (MOFs), particularly emphasizing the development of crystal sponges, studying reactions in frameworks and ...
Eugenia Miguel‐Casañ, Georgia R. F. Orton, Danielle E. Schier, Neil R. Champness   +3 more
wiley   +1 more source