Results 141 to 150 of about 124,782 (320)

Interfacial Photoelectrochemistry in Organic Synthesis

open access: yesAngewandte Chemie International Edition, Accepted Article.
Photoelectrodes have traditionally enjoyed widespread attention as heterogeneous catalysts for the activation of water and CO2 in energy research, while photoelectrochemistry with homogeneous molecular catalysts dominates the activations of more complex molecules in organic synthesis.
Gabriel Chan   +4 more
wiley   +1 more source

Ringed spherulitic and undulated textures in the nematic phase of a mixture of trans-4-hexylcyclohexanecarboxylic and benzoic acids

open access: yes, 2009
We present a polarising optical microscopy study of a liquid-crystal mixture of trans-4-hexylcyclohexanecarboxylic acid (C6) and benzoic acid. Both materials have carboxylic groups that can form dimers through hydrogen bonding. The mixture is nematic and
Sparavigna, Amelia Carolina
core   +1 more source

Red‐Light‐Mediated Generation of Radicals: Applications in Organic Synthesis, Small‐Molecule Activation, Polymerization, and Bio‐Related Fields

open access: yesAngewandte Chemie International Edition, EarlyView.
Visible light‐driven photochemistry has advanced significantly, offering diverse methodologies in synthetic organic chemistry. Photocatalysis using red and near‐infrared (NIR) light is particularly notable due to its lower energy, reduced phototoxicity, minimized side reactions, and deeper penetration into reaction media.
Tong Zhang, Suman Pradhan, Shoubhik Das
wiley   +1 more source

Quantitative Structure-Property Relationships for Predicting the Retention Indices of Fragrances on Stationary Phases of Different Polarity [PDF]

open access: yes, 2017
El objetivo de este trabajo fue el desarrollo de relaciones cuantitativas estructura–propiedad predictivas para el modelado de índices de retención (I) de fragancias, medidas en tres fases estacionarias de diferente polaridad: DB–225MS, HP5–MS y HP–1. Se
Duchowicz, Pablo Román   +3 more
core   +1 more source

Mechanochemical Strategies Applied to the Late‐Stage Modifications of Pharmaceutically Active Compounds

open access: yesAngewandte Chemie International Edition, Accepted Article.
This review explores the potential of mechanochemistry in the late‐stage modification of active pharmaceutical ingredients (APIs), offering a comprehensive analysis of methods designed to transform structurally complex molecular scaffolds. By examining the scope, efficiency, and mechanistic aspects of these approaches, the review highlights protocols ...
Johanna Templ, Lars Borchardt
wiley   +1 more source

Examining the PM6 semiempirical method for pKa prediction across a wide range of oxyacids [PDF]

open access: yes, 2009
The pK~a~ estimation ability of the semiempirical PM6 method was evaluated across a broad range of oxyacids and compared to results obtained using the SPARC software program.
Kaya Forest   +2 more
core   +1 more source

Total Synthesis and Structural Revision of (−)‐Sodagnitin E

open access: yesAngewandte Chemie International Edition, EarlyView.
Malabaricane triterpenoid sodagnitin E is a chromogen found in various toadstools. This work represents the first total synthesis of (−)‐sodagnitin E as well as the first total synthesis of any malabaricane natural product. A Mukaiyama aldol reaction was utilized to perform a convergent synthesis from two enantioselectively synthesized fragments ...
Philipp Schoch, Tanja Gaich
wiley   +1 more source

Life fingerprints of nuclear reactions in the body of animals [PDF]

open access: yes, 2010
Nuclear reactions are a very important natural phenomenon in the universe. On the earth, cosmic rays constantly cause nuclear reactions. High energy beams created by medical devices also induce nuclear reactions in the human body.
Ci-yi Liu   +8 more
core   +1 more source

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