Results 151 to 160 of about 21,334,376 (275)

C‐Acylation of Guaiacol with Acetic Acid Over Solid Acid Catalysts Under Mild Reaction Conditions

ChemCatChem, EarlyView.
Direct acylation of guaiacol (G) with acetic acid (AA) over Aquivion® PW87 under mild conditions affords 4‐hydroxy‐3‐methoxyacetophenone (p‐HMAP) with a remarkable para/ortho molar ratio of 26:1. Combined DFT and experimental studies reveal an acid‐catalyzed intermolecular acyl transfer via 2‐methoxyphenyl acetate (MPA), enabling a highly selective and
Nicola Schiaroli, Francesca Foschi, Massimo Mella, Carlo Lucarelli   +3 more
wiley   +1 more source

Photoswitching of the Two‐Photon Absorption of Donor‐Acceptor Substituted Dithienylethenes

ChemistryEurope, EarlyView.
Switching two‐photon absorption: Donor‐acceptor substituted dithienylethenes are shown to switch their two‐photon absorption properties upon light‐induced electrocyclic isomerization. In this work the structural and electronic integration of push–pull systems with photoactivatable dithienylethenes (DTEs) is demonstrated.
Francisco G. Blandón‐Cumbreras, Marc Villabona, Julia Osmólska, Elizaveta F. Petrusevich, David B. Guzmán Ríos, Robert Zaleśny, Joanna Olesiak‐Bańska, Jordi Hernando, Uwe Pischel   +8 more
wiley   +1 more source

Photochemical Allylation of Aldehydes or Alkanes with Vinyl Cyclopropanes

ChemistryEurope, EarlyView.
An acylation or alkylation of vinyl cyclopropanes, employing tetra‐n‐butylammonium decatungstate as the photocatalyst, leading allyl ketones or alkenes is presented. A diverse range of substrates were compatible with this protocol, while flow conditions were also developed and mechanistic studies were also performed.
Naya A. Stini, Christoforos G. Kokotos
wiley   +1 more source

Next‐Gen Catalysts: Introducing C2 Symmetrical Chiral Phosphoric Acids on a Decahydroquinoxaline Scaffold

ChemistryEurope, EarlyView.
This study presents novel, highly tunable chiral phosphoric acids (CPAs) with a decahydroquinoxaline scaffold, synthesized via stereoselective pinacol coupling of Salen‐like bisimines from aromatic aldehydes and enantiopure trans‐1,2‐diaminocyclohexane.
Margherita Gazzotti, Manuel Orlandi, Sergio Rossi, Laura Raimondi, Maurizio Benaglia   +4 more
wiley   +1 more source

The Chemistry of Subphthalocyanines: Synthetic Strategies for their Axial, Peripheral, and Remote Postfunctionalization

ChemistryEurope, EarlyView.
From axial and peripheral reactivity to remote derivatization, the chemical versatility of subphthalocyanines (SubPcs) renders them ideal scaffolds for the design of advanced functional materials. This review assembles the synthetic toolbox, key reaction conditions, and future challenges in SubPc functionalization, guiding the development of next ...
Marta Gómez‐Gómez, Juan Laforga‐Martín, Jorge Labrador‐Santiago, Jorge Labella, Tomás Torres   +4 more
wiley   +1 more source

Chemical Methods for Peptide and Protein Backbone Cleavage

ChemistryEurope, EarlyView.
Protein cleavage plays essential roles in biology and is powerful for protein manipulation and functionalization as well as in recombinant expression and purification. Here, the historical background and most recent examples of chemical methods for protein and peptide backbone cleavage are discussed (part of the figure was generated in BioRender).
Miguel Angel Alena‐Rodriguez, Christian A. Olsen   +1 more
wiley   +1 more source

Biological Conversion of Formate to Organic Compounds: Toward a Sustainable Formate Bioeconomy

Carbon Energy, EarlyView.
Formate bioconversion plays a crucial role in achieving renewable resource utilization and sustainable development. To tap its full potential, it is important to identify the most appropriate microbial hosts for incorporating formate into building blocks, design the most promising metabolic pathways for transmitting formate into central carbon ...
Jinyi Qian, Tiantian Chai, Chunlei Zhao, Xiulai Chen   +3 more
wiley   +1 more source

Protein S-acylation controls the subcellular localization and biological activity of PHYTOCHROME KINASE SUBSTRATE. [PDF]

Plant Cell, 2023
Lopez Vazquez A, Allenbach Petrolati L, Legris M, Dessimoz C, Lampugnani ER, Glover N, Fankhauser C.   +6 more
europepmc   +1 more source

Ester‐Aroyl‐S,N‐Ketene Acetals with Solid‐State Luminescence: AIEgens from Sequential Three‐Component Desymmetrization

Chemistry – A European Journal, EarlyView.
The difference in nucleophilicity of alcohols and S,N‐ketene acetals sets the stage for the desymmetrizing acylation of diaroyl chlorides in a consecutive one‐pot fashion in good yields. The ester‐functionalized aroyl‐S,N‐ketene acetals are solid‐state emitters that emit in solution only upon aggregation. Upon encapsulation in polystyrene nanoparticles,
Yannic Hartmann, Abdelouahad El Abbassi, Bernhard Mayer, Ute Resch‐Genger, Thomas J. J. Müller   +4 more
wiley   +1 more source

Azobenzene‐Based Glycomacrocycles: Synthesis, Photoisomerization, and Photomodulation of Liquid Crystal Helical Pitch with Helix Inversion

Chemistry – A European Journal, EarlyView.
Macrocyclic glycoazobenzenes: Four new azobenzene‐functionalized glycomacrolactones bearing different substituents on the glucopyranoside ring have been synthesized. These photoswitchable chiral macrocycles behave as chiral dopants of NLCs, with an amplification of helix upon E to Z photoisomerization and enforcement of HTP at Z‐rich state.
Gaoyu Li, Reo Hatano, Stéphane Maisonneuve, Ken‐ichi Iimura, Yuna Kim, Juan Xie   +5 more
wiley   +1 more source