Results 291 to 300 of about 176,899 (357)

Facile N═N Bond Cleavage of Cis‐Azobenzene with Bis‐silylenes

Angewandte Chemie, EarlyView.
The unexpectedly easy N═N bond scission of cis‐azobenzene using two bis‐silylenes with different spacers and distinct SiII···SiII distances is reported. While both bis‐silylenes enable C─H and N═N π‐bond activation of trans‐azobenzene, the cooperative disilicon(II)‐mediated activation of cis‐azobenzene leads to bis‐silamines (Si═N) and related novel ...
Yun Xiong, Shenglai Yao, Matthias Driess
wiley   +1 more source

One-pot synthesis of quinazolinone heterocyclic compounds using functionalized SBA-15 with natural material ellagic acid as a novel nanocatalyst. [PDF]

Sci Rep
Mohassel Yazdi N, Naimi-Jamal MR.
europepmc   +1 more source

Studies with heterocyclic compounds containing the azomethine grouping

, 1950
J. Lewis Towle
openalex   +2 more sources

Xanthopinacol Boronate: A Robust, Photochemically Assembled and Cleavable Boronic Ester for Orthogonal Chemistry

Angewandte Chemie, EarlyView.
Xanthopinacol (xpin) boronates are a conceptually new class of masked boronic acids designed to alleviate many of the disadvantages of pinacol esters and other popular adducts. They can be formed directly from xanthone and UV light, undergo orthogonal transformations, and are cleavable under photoredox catalysis or oxidative conditions that recycle ...
David M. Heard, Martin C. Lessard, Dennis G. Hall   +2 more
wiley   +1 more source

Asymmetric Intramolecular α‐Arylation of Polar Amino Acids Bearing β‐Leaving Groups

Angewandte Chemie, EarlyView.
Use of enolate chemistry to functionalise amino acids with β‐heteroatom side‐chains (serine, cysteine, threonine, etc.) is hampered by β‐elimination. We show that α‐arylation can be achieved by incorporating the side chain into a saturated heterocycle, making the unwanted elimination a disfavoured 5‐endo‐trig reaction.
Ömer Taspinar, Daniel J. Leonard, Nathan Picois, Cornelia Göcke, Matej Žabka, Hazel A. Sparkes, Jonathan Clayden   +6 more
wiley   +1 more source

Structural Origin of Spin‐Orbit Splitting of 1P Orbitals of Icosahedral Au13 Superatom Protected by Ligands

Angewandte Chemie, EarlyView.
The spin‐orbit (SO) splitting of the superatomic 1P orbitals in thiolate‐protected Au13 superatoms were investigated. Cryogenic anion photoelectron spectroscopy and fully relativistic calculation including SO coupling revealed the 1P orbitals of the Au13 and Au@Ag12 superatomic cores undergo SO splitting, while not in the Ag13 core.
Shun Ito, Kiichirou Koyasu, Tatsuya Tsukuda   +2 more
wiley   +1 more source

Iridium‐Catalyzed Enantioselective Intramolecular Hydroarylation of Allenes: Formal Synthesis of (+)‐Rhazinilam

Angewandte Chemie, EarlyView.
A highly enantioselective iridium‐catalyzed hydroarylation of allene‐tethered pyrroles and indoles that provides access to relevant heterocyclic systems bearing vinyl‐substituted 3ry or 4ry stereocenters is reported. Its synthetic potential was exemplified with a very short, highly enantioselective formal synthesis of (+)‐Rhazinilam, whereas DFT ...
Andrés Arribas, Alejandro Rey, Martín Calvelo, José L. Mascareñas, Fernando López   +4 more
wiley   +1 more source

Photochemical Conversion of Indazoles into Benzimidazoles

Angewandte Chemie International Edition, EarlyView.
We present a photochemical strategy for transforming 1H‐ and 2H‐indazoles into benzimidazoles, enabling heteroaromatic interconversion under mild conditions. This approach, grounded in a two‐step mechanism of excited‐state tautomerization and photochemical rearrangement, offers broad scope, high yields, and functional group tolerance, expanding the ...
Thiago dos Santos, Cornelia S. Buettner, Dilara Berna Yildiz, Martina Mamone, Alessandro Ruffoni, Daniele Leonori   +5 more
wiley   +1 more source

Interfacial Photoelectrochemistry in Organic Synthesis

Angewandte 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, Daria Corsi, Oleksandr Savateev, Paolo Giusto, Joshua Philip Barham   +4 more
wiley   +1 more source