Results 111 to 120 of about 37,042 (298)

Generation of Functionalized Azepinone Derivatives via a (4 + 3)-Cycloaddition of Vinyl Ketenes and Imino Carbenes Derived from NSulfonyl-triazoles

open access: yes, 2022
An intermolecular RhII-catalyzed, formal (4 + 3)-cycloaddition between vinyl ketenes and N-sulfonyl-1,2,3-triazoles for the construction of azepinone products is described.
Brandon L. Ashfeld (1701802)   +9 more
core   +1 more source

Beyond Simple Mimicry: Next‐Generation Geometric Architectures and Future Paradigms in Small‐Molecule and Macrocyclic Peptidomimetics

open access: yesAngewandte Chemie, EarlyView.
Peptide‐to‐Small Molecule Paradigm: Peptidomimetics have evolved from simple mimicry toward drug‐like scaffolds supported by increasing clinical successes. This Perspective highlights the geometric design principles—linear repetition, convergent fusion, and cyclization—defining the next‐generation peptidomimetic architectures capable of targeting ...
Jesang Lee   +5 more
wiley   +2 more sources

Synthesis and In Vitro Antiproliferative Activity of Novel Androst-5-ene Triazolyl and Tetrazolyl Derivatives

open access: yesMolecules, 2011
A straightforward and reliable method for the regioselective synthesis of steroidal 1,4-disubstituted triazoles and 1,5-disubstituted tetrazoles via copper(I)-catalyzed cycloadditions is reported. Heterocycle moieties were efficiently introduced onto the
János Wölfling   +7 more
doaj   +1 more source

Polyproline: A Synthetic Polypeptide With Unique Properties

open access: yesAngewandte Chemie, EarlyView.
Poly‐L‐proline is a unique polypeptide distinguished by its well‐defined secondary structures and unusual thermal behavior. This mini review highlights recent advances in the synthesis of poly‐L‐proline by N‐carboxyanhydride (NCA) polymerization, the formation of structurally defined architectures and nanostructures, and emerging strategies that ...
Rosanna Le Scouarnec   +3 more
wiley   +2 more sources

Copper-Catalyzed AzideAlkyne Cycloaddition of Hydrazoic Acid Formed In Situ from Sodium Azide Affords 4Monosubstituted-1,2,3-Triazoles

open access: yes, 2022
We report a copper-catalyzed cycloaddition of hydrogen azide (hydrazoic acid, HN3) with terminal alkynes to form 4-substituted-1H-1,2,3-triazoles in a sustainable manner.
Martin Gazvoda   +5 more
core   +1 more source

Copper-Catalyzed Three-Component Reaction of Alkynes, TMSN3, and Ethers: Regiocontrollable Synthesis of N1- and N2‑Oxyalkylated 1,2,3-Triazoles

open access: yes, 2019
A new copper-catalyzed selective synthesis of N1- and N2-oxyalkylated 1,2,3-triazoles has been developed through a three-component reaction of alkynes, TMSN3, and ethers. Through this methodology, a series of N1- and N2-oxyalkylated 1,2,3-triazoles could
Pengli Bao   +11 more
core   +1 more source

A Multicomponent Electrosynthesis of 1,5-Disubstituted and 1‑Aryl 1,2,4-Triazoles

open access: yes, 2018
A novel electrochemical route has been developed for the synthesis of 1,5-disubstituted and 1-aryl 1,2,4-triazoles from aryl hydrazines, paraformaldehyde, NH4OAc, and alcohols.
Gaoqing Yuan (1652311), Na Yang (266025)
core   +1 more source

Aktivierung von Metallkomplexen durch Ultraschallwellen für eine gezielte Krebstherapie

open access: yesAngewandte Chemie, EarlyView.
Ultrasound enables non‐invasive activation of metal‐based therapeutics deep within tumors. Acoustic cavitation can drive sonodynamic reactive oxygen species generation or mechanochemical metal–ligand bond dissociation, enabling controlled release of bioactive payloads.
Félix Grosjean   +3 more
wiley   +1 more source

Molecularly Templated Buried Interfaces for Inverted Perovskite Solar Cells

open access: yesAngewandte Chemie, EarlyView.
We demonstrate a molecularly matched buried interface between SAM and perovskite, enhancing adhesion and passivating defects. This optimized interface achieves 26.58% power conversion efficiency and 86.72% fill factor with exceptional operational stability in both large‐area and wide‐bandgap devices, thereby increasing efficiency and prolonging ...
Songyang Yuan   +19 more
wiley   +2 more sources

Nuclear Quadrupole Resonance Spectroscopy: Tautomerism and Structure of Functional Azoles

open access: yesCrystals, 2019
The Nuclear Quadrupole Resonance spectroscopy data of functionalized azoles (imidazoles, triazoles and corresponding benzazoles) are reviewed and critically discussed. The possibility of studying the tautomerism of azoles by the NQR method is considered.
Lyudmila I. Larina
doaj   +1 more source

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