Results 131 to 140 of about 29,810 (265)

Spectroscopy and Conformer‐Selective Photoelectron Circular Dichroism of Chiral Molecules

Chemistry – An Asian Journal, Volume 21, Issue 9, 14 May 2026.
Photoelectron circular dichroism (PECD) is a forward–backward asymmetry in the angular distribution of the electrons emitted by a chiral molecule ionized by a circularly polarized light (CPL). Its sensitivity to conformation is studied by one‐photon or resonance‐enhanced two‐photon ionization, the latter being conformer‐selective.
Laurent Nahon, Anne Zehnacker
wiley   +1 more source

Stereoselective cyclo-addition reactions of azomethine ylides catalysed by in situ generated Ag(I)/bisphosphine complexes [PDF]

, 2010
Stereoselective cyclo-addition reactions of azomethine ylides promoted by in situ generated Ag(I)/bisphosphine complexes were studied. Under the optimised conditions, the pyrrolidine products were isolated in up to 84 % yield and with up to 71 % e.e. The
RONALD GRIGG, SUREN HUSINEC, VLADIMIR SAVIĆ   +2 more
core  

Cyrene Dimethyl Acetal: Potential Alternative Solvent for Pd‐Catalyzed Homogeneous Aminocarbonylation of Iodo(hetero)arene Compounds

ChemPlusChem, Volume 91, Issue 5, May 2026.
Insert text for Table of Contents here. In this research, the synthesis of new Cyrene derivatives (Cyrene dimethyl acetal and Cyrene diethyl acetal) was accomplished, and the investigation of their physicochemical properties was completed. It was also shown after a detailed optimization study that Cyrene dimethyl acetal could be an appropriate ...
Attila Takács, Nuray Uzunlu Ince, Zoltán Medgyesi, Huda Hamed, László Kollár, Bence Mihalovics, László T. Mika   +6 more
wiley   +1 more source

Carbohydrate‐Based Drug Discovery: Synthetic Strategies and Clinical Applications

Israel Journal of Chemistry, Volume 66, Issue 3, May 2026.
The picture depicts the molecules discussed in the review. On the left side, the general scaffold of sugars is shown. Next to it are four carbohydrate‐based molecules, including remdesivir, islatravir, empagliflozin, and Globo‐H. Remdesivir and islatravir contain a substituted ribose ring attached to a modified nucleobase.
Stephan Scheeff, Jemma Arakelyan, Billy Wai‐Lung Ng   +2 more
wiley   +1 more source

Metalloamination/Cyclization of Zinc(II) Amides Derived from N,N-Dimethylhydrazinoalkenes—Applications for the Direct C-SP² Functionalization of Aryl and Vinyl Electrophiles

Inorganics
Treatment of N,N-dimethylhydrazinoalkenes with diethylzinc followed by exposure of the resulting ethylzinc amides to high vacuum drives a Schlenck redistribution metalloamination/cyclization to generate the corresponding bis(organozinc) intermediates in ...
Jérome Lépeule, Christian Frabitore, Tom Livinghouse   +2 more
doaj   +1 more source

Enantioselectivity in Transition Metal Catalyzed Propargylic Substitution Reactions: A Theoretical Perspective

Chemistry – A European Journal, Volume 32, Issue 15, 22 April 2026.
Recent theoretical efforts to elucidate the origin of enantioselectivity in transition metal‐catalyzed propargylic substitution reactions are highlighted in this review. ABSTRACT In recent years, asymmetric catalytic propargylic substitution reactions have undergone remarkable development, enabling the construction of chiral carbon centers adjacent to ...
Ken Sakata, Yoshiaki Nishibayashi
wiley   +1 more source

Synthesis of a Carbon‐Linked Acyldepsipeptide Derivative

European Journal of Organic Chemistry, Volume 29, Issue 15, 22 April 2026.
The synthesis of a methylene‐linked acyldepsipeptide (ADEP) is reported. Success relied upon an improve method to generate a versatile vinyl glycine methyl ester synthon and a rationally optimized Grubb’s metathesis. NMR and in silico studies revealed an unusual trans–trans proline orientation for this new unnatural ADEP analog, advancing the ...
Katelyn G. Stevens-Davis, Xiaozheng Dou, Bo Hu, Yangxiong Li, Jiayuan Miao, Yu-Shan Lin, Adam S. Duerfeldt   +6 more
wiley   +1 more source

Piperidines from acid-catalysed cyclisations: Pitfalls, solutions and a new ring contraction to pyrrolidines [PDF]

, 2017
Aldmairi, Abdu H., Dupauw, Alexis, Griffiths-Jones, Charlotte, Henderson, Laura, Knight, David   +4 more
core   +2 more sources

Palladium‐Catalyzed [3+2] Cycloadditions of Alkylidenecyclopropanes to Imines: A Direct Approach to Pyrrolidine Scaffolds

ChemistryEurope
Alkylidenecyclopropanes (ACPs) can work as versatile 3 C partners in a range of [3+n] cycloadditions with unsaturated carbon partners. We now demonstrate that they can also be harnessed for inter‐ and intramolecular palladium‐catalyzed [3+2] formal ...
Ricardo Rodiño, Felipe Verdugo, José L. Mascareñas, Fernando López   +3 more
doaj   +1 more source

A combined experimental and theoretical investigation of the stereoselectivity in the synthesis of azahetrocyclic phosphonates [PDF]

, 2008
Since the discovery of the biological activity of aminoalkylphosphonates, e.g. as enzyme inhibitors, many researchers have focused their attention on conformationally constrained azaheterocyclic phosphonates. Stereocontrol is of major interest during the
Claeys, Diederica, Moonen, Kristof, Roman, Bart, Stevens, Christian, Van Speybroeck, Veronique, Waroquier, Michel   +5 more
core   +1 more source