Results 191 to 200 of about 153,409 (261)

Substrate‐Controlled Enantiodivergence in Ni‐Catalyzed Access to Phosphorylated Oxindoles With Quaternary Stereocenters

Angewandte Chemie, EarlyView.
An efficient, enantiodivergent synthesis of phosphorylated oxindoles with quaternary stereocenters is achieved via a nickel‐catalyzed intermolecular Heck‐phosphorylation cascade. Employing a single chiral catalyst, either product enantiomer is selectively accessed simply by changing the alkene leaving group. DFT calculations trace this stereodivergence
Haimeng Zhu, Lewen Wang, Shihui Luo, Xinglong Zhang, Jun (Joelle) Wang   +4 more
wiley   +1 more source

Pharmaceutical Extension Service

American Journal of Pharmaceutical Education, 1959
openaire   +1 more source

Entdeckung eines antiviralen Elektronentransferprozesses zur Erzeugung katalytisch selbstversorgender viraler Restriktionsfaktoren

Angewandte Chemie, EarlyView.
CYB5R3 wird als mutmaßlicher Elektronentransferpartner von Viperin (RSAD2) identifiziert, was erklärt, warum die ER‐Lokalisation für die antivirale Aktivität erforderlich ist. Dieses Wissen ermöglichte die Entwicklung immunstiller, katalytisch selbstversorgender antiviraler Restriktionsfaktor‐Enzyme (iCAREs), die ein antivirales Nukleosidtriphosphat ...
Mengdi Wu, Nghi Thao Hoang, Deborah Grifagni, Meritxell Wu‐Lu, Yujie Sheng, Theo Situmorang, Pei‐Hsin Tai, Zheng Chen, Astrid Maluta, Mohammed Hakil, Bianca Susini, Hannah Florance, Peter‐Leon Hagedoorn, John Mark Sutton, Maria‐Andrea Mroginski, Simone Ciofi‐Baffoni, Kourosh H. Ebrahimi   +16 more
wiley   +1 more source

Direct Regioselective para‐Fluorination via I(I)/I(III) Catalysis

Angewandte Chemie, EarlyView.
A direct, para‐selective fluorination by I(I)/I(III) catalysis is disclosed that does not require substrate pre‐functionalization. This strategy leverages the Leonard link inherent to phenylpropanoate and phenylpropanamides to promote a spirocyclization/para‐selective sequence. The C3‐side chain maps onto a range of common drug scaffolds and allows the
Christoph Roblick, Julian D. Bendix, Timothy A. Hilton, Kathrin Bussmann, Constantin G. Daniliuc, Ryan Gilmour   +5 more
wiley   +1 more source

Transition Metal‐Free Heteroarene Insertion Into C─C Bonds of Benzocyclobutenones

Angewandte Chemie, EarlyView.
A transition metal‐free insertion of five‐membered heteroarenes into the C─C bonds of benzocyclobutenones has been achieved under mild and operationally simple conditions. This method provides an efficient and modular approach to access fused partially saturated hetero‐polycyclic scaffolds that exist in many bioactive molecules.
Cole J. Wagner, Guangbin Dong
wiley   +1 more source

Copper(II/III) Redox Couple Enables C─H Methylation via a Radical Mechanism Analogous to SAM Enzymes

Angewandte Chemie, EarlyView.
Biological C–H methylation proceeds through radical pathways mediated by one‐electron redox cofactors, yet no synthetic model has reproduced this reactivity. Here, we report the first isolable Cu(II/III)–methyl complexes that mediate C–H methylation through hydrogen atom transfer and methyl radical rebound.
Emily N. Doss, Curtis E. Moore, Shiyu Zhang   +2 more
wiley   +1 more source

Practical Considerations of FDA’s CLAP List to Support Testing of Extractables for Pharmaceuticals and Medical Devices

ACS Omega
Megan Flohl, Maria Tolstyakova, Emre Seyyal, Anna Michelson, Louis Fleck, Gyorgy Vas   +5 more
doaj   +1 more source

Coordination‐Driven Direct C─H Metalation of N‐Heterocycles With a Superbasic Co(II) Amide Co(TMP)2

Angewandte Chemie, EarlyView.
By enabling regioselectivities that are inaccessible with conventional bases, this study introduces a Co(II) amide platform for the deprotonative C─H metalation of sensitive N‐heterocycles. Subsequent interception of the resulting Co(II) intermediates with external oxidants affords a family of sterically congested, TMP‐substituted heterocycles via C─N ...
Na Jin, Manting Mu, Max García‐Melchor, Eva Hevia   +3 more
wiley   +1 more source

Localized Accumulation of Tri‐n‐Propylamine Prolongs Electrochemiluminescence for Tumor Model Spheroid Analysis

Angewandte Chemie, EarlyView.
Here, we enhance the electrochemiluminescence imaging of cellular spheroids using [Ru(bpy)3]2+/TPrA chemistry. Our strategy, which involves pre‐incubation with TPrA, enables high‐resolution, long‐term visualization of cellular spheroids without phototoxicity.
Vanshika Gupta, Megan L. Hill, Samuel P. Nortz, Yashvi Choudhary, Ashutosh Rana, Jeffrey E. Dick   +5 more
wiley   +1 more source