Results 191 to 200 of about 32,974 (279)

Cyclopropylamine‐Derived Distonic Iminium Radicals: Photoinduced Strategies in Chemo‐ and Stereo‐Selective Synthesis

Chemistry – A European Journal, EarlyView.
Cyclopropylamines have emerged as powerful photocatalytic building blocks. Upon light‐induced single‐electron oxidation, they undergo strain‐release ring opening to generate distonic iminium radicals that enable diverse transformations, including ring‐opening functionalization, formal [3 + 2] cycloadditions, radical cascades, and asymmetric bond ...
Maria Chiara Cabua, Alberto Luridiana, Francesco Secci, Emanuele Cocco   +3 more
wiley   +1 more source

Metal-Free Photoinduced Hydrogen Atom Transfer for Direct Thiolation of Hydridic α‑C(sp³)-H of Ethers. [PDF]

ACS Omega
Karr A, Picazo E.
europepmc   +1 more source

Regioselective Aldol Reactions Directed by Charge and Orbital Effects in Cyclic Germyl Dienolates: Synthesis of Three Distinct Regio‐ and Stereoisomers

Chemistry – A European Journal, EarlyView.
Charge and orbital control represent fundamental principles in organic chemistry. In this study, these principles are applied to the aldol reactions of a cyclic Ge‐dienolate. By systematically tuning the charge and orbital distributions of the Ge‐dienolates and their aldehyde reaction partners, regio‐ and stereoselective access to three distinct aldol ...
Taishi Nojima, Akihito Konishi, Makoto Yasuda   +2 more
wiley   +1 more source

Computational prediction of C-H hydricities and their use in predicting the regioselectivity of electron-rich C-H functionalisation reactions. [PDF]

Beilstein J Org Chem
Borup RM, Ree N, Jensen JH.
europepmc   +1 more source

The Mechanism of Visible‐Light Photochemical Rearrangements of Conjugated Amide Enolates

Chemistry – A European Journal, EarlyView.
Visible light irradiation of extended enolates of N‐benzylamides leads to homolytic C─N Bond cleavage, generating a biradical. Computational and mechanistic studies suggest rapid radical recombination within a solvent cage to give either ring‐expanded or rearranged products. ABSTRACT Deprotonation of conjugated amides forms colored solutions of lithium
James Mortimer, William Terry‐Wright, Basile F. E. Curchod, Jonathan Clayden   +3 more
wiley   +1 more source

Photoinduced Palladium-Catalyzed Site-Selective Meta-Alkylation of Pyridines. [PDF]

Angew Chem Int Ed Engl
Singh A, Kancherla R, Dutta S, Dey A, Pal K, Maity B, Kloene L, Cavallo L, Koenigs RM, Rueping M.   +9 more
europepmc   +1 more source

Synthesis and Structures of Novel Chiral Cyclic Hypervalent Iodine(III) Reagents for Metal‐Free Ligand‐Transfer Reactions

Chemistry – A European Journal, EarlyView.
Several new chiral cyclic hypervalent iodine(III) reagents have been synthesized and characterized. Carbon‐based ligands were successfully installed onto the hypervalent iodine centers, giving thus access to novel chiral cyano‐, trifluoromethyl‐ or alkynyl‐bearing λ3‐iodanes.
Emmanuel Valzer, Jean‐Marc Sotiropoulos, Karinne Miqueu, Laurent Pouységu, Stéphane Quideau   +4 more
wiley   +1 more source

RuO4-mediated oxidation of N-benzylated tertiary amines. 3. Behavior of 1,4-dibenzylpiperazine and its oxygenated derivatives

Open Chemistry, 2006
Petride Horia, Drăghici Constantin, Florea Cristina, Petride Aurica   +3 more
doaj   +1 more source

Aryne-mediated direct assembly of <i>O</i>-bridged seven-membered cyclic diaryliodoniums: access to oxaheteropines and cannabinols <i>via</i> skeletal modification. [PDF]

Chem Sci
Kamioka S, Morohashi S, Kikuchi J, Kwon E, Yoshikai N.   +4 more
europepmc   +1 more source

Well‐Defined Nickel Precatalysts: Form, Function, and Application

Chemistry – A European Journal, EarlyView.
This review provides guidance on which nickel precatalysts to choose for a given application or which properties to prioritize in reaction development. A summary of the ease of synthesis, stability, diversity, accessibility, modularity, and general applicability is provided along with a related infographic.
Morgan E. John, George A. Koutsantonis, Reto Dorta, Scott G. Stewart   +3 more
wiley   +1 more source