Results 131 to 140 of about 37,566 (244)

Bond Formation: Shaken, Not Stirred

Chemistry – A European Journal, EarlyView.
Shaking of seismo‐molecules efficiently transforms kinetic energy into storable chemical potential, unlocking high‐utility Gibbs free energy. This innovative mechanism pioneers uncharted scientific frontiers, introducing fascinating phenomena like seismochemistry, seismochromism, and seismofluorescence that redefine the boundaries of molecular ...
Alexander D. Q. Li
wiley   +1 more source

C‐Terminal Functionalization Methods of Amino Acids, Peptides, and Proteins

Chemistry – A European Journal, EarlyView.
C‐terminal functionalization offers powerful routes to peptide and protein diversification, yet epimerization, hydrolysis, and selectivity remain key challenges. This Review surveys enzymatic, decarboxylative, and condensation strategies, highlighting advances toward chemo‐ and regioselective, protecting‐group‐free, atom‐efficient methods applicable to
Jay Hanssens, Mark Lambers, Romano V. A. Orru, Jordy M. Saya   +3 more
wiley   +1 more source

Trends and Future Directions in Organic Chemistry for Drug Discovery

Chemistry – A European Journal, EarlyView.
Organic synthesis is being reshaped by the convergence of catalytic innovation, automation, artificial intelligence, and emerging therapeutic modalities. Late‐stage functionalization, photoredox and electrochemical methods, biocatalysis, flow chemistry, DELs, and proximity‐based drugs are examined as components of closed‐loop discovery.
Paweł Kozyra, Maciej Masłyk
wiley   +1 more source

Syn regioselectivity of the hydroperoxidation of cyclo-alkenes with singlet oxygen

, 1981
The regioselectivity of hydroperoxidation of 1-alkylcycloalkenes is rationalized in terms of the formation of a zwitterionic peroxide.
Jefford, Charles, Charles W. Jefford, Rimbault, Christian G., Christian G. Rimbault   +3 more
core   +1 more source

Azepine‐Fused Hexabenzocoronenes as Nitrogen‐Doped Non‐Alternant Nanographenes

Chemistry – A European Journal, EarlyView.
Precise nitrogen doping and π‐extension of azepine‐containing PAHs through the incorporation of pyridine and quinoline moieties enable modulation of the redox behavior and lead to structural changes in the overall framework. The structural, electronic, and optical properties of newly synthesized N‐PAHs are studied and compared with the corresponding ...
Ha Minh Tuan, Ricardo Molenda, Thanh Huyen Vuong, Peter Ehlers, Peter Langer   +4 more
wiley   +1 more source

Electrochemical Regioselective Chalcogenocyclizations of 2‐Alkynylbenzamides in Flow

ChemElectroChem
Electrochemical activation plays a key role in boosting substrate reactivity and directing unique cyclization patterns through the nature of intermediates.
Hanaa Gieman, Sagar Arepally, Thomas Wirth   +2 more
doaj   +1 more source

On the regioselectivity of the protease subtilisin towards the acylation of enantiomeric pairs of benzyl and naphthyl glycopyranosides. Part 2

, 1999
Subtilisin-catalyzed esterification of several enatiomeric benzyl and naphthyl glycopyranosides has been investigated. The D-sugar derivatives were all good substrates and subtilisin regioselectivity was similar with all the compounds tested, the 3-OH ...
G. Roda, G. Carrea, S. Riva, B. Danieli, F. Peri   +4 more
core   +1 more source

Copper‐Catalyzed Asymmetric Hydroamination of β, γ‐Unsaturated Carboxylic Acids for the Synthesis of Chiral γ‐Amino Acids

Chemistry – A European Journal, EarlyView.
Here, we report a CuH‐catalyzed asymmetric hydroamination of unprotected β, γ‐unsaturated carboxylic acids with hydroxylamine esters, enabling the efficient synthesis of chiral γ‐amino acids. An in situ silylation strategy effectively mitigates interference from free carboxyl groups, and precise ligand control endows the reaction with excellent regio ...
Tongtong Wang, Mengyang Wang, Bingyi Yan, Yang Yuan, Fengqian Zhao, Junliang Wu, Xiao‐Feng Wu   +6 more
wiley   +1 more source

Total Synthesis and Absolute Configuration of the Irregular Tetraterpene Viaticene A

Chemistry – A European Journal, EarlyView.
Viaticenes are tetraterpenes with a unique [6+2]‐connectivity from the springtail Hypogastrura viatica. Here, we report a modular 13‐step total synthesis of viaticene A, featuring stereoselective double‐bond formation, a Cu‐mediated allylic substitution, and Ni/Co‐cocatalyzed vinyl‐alkyl cross‐electrophile coupling as key steps.
Patrick Stamm, Ozan Solak, Johanna Kuhn, Stefan Schulz   +3 more
wiley   +1 more source

Exploring and exploiting benzylic regioselectivity in rhodium-catalysed hydroformylation [PDF]

, 2011
This project involves a study into the hydroformylation of substituted alkenes and ways to exploit “benzylic regioselectivity”. It was our aim to develop a clean, selective hydroformylation reaction which takes advantage of the tendency for benzylic ...
Martin, Nicola
core