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Despite the prominence of C-N bond forming cross-coupling reactions as a strategy to assemble molecular fragments, aminative coupling approaches, in which two fragments are assembled directly at the heteroatom, represents a rarely exploited retrosynthetic strategy. Herein, we report the design, synthesis, and implementation of an anomeric amide reagent capable of promoting highly regioselective aminative alkene-arene and alkene-alkene coupling reactions. This transformation follows a sequence of catalyst-free chloroamination, N-deprotection, and formal nitrene functionalization, all in one-pot. Due to the simplicity of both the protocol and the building blocks required, high-throughput experimentation (HTE) was employed, in combination with a full-scale scope, to rapidly and efficiently explore a wide range of chemical space and determine the limits of reactivity. In addition, alternative reactivity modes from the functionalized intermediates delivered by this protocol demonstrate the divergent nature of this aminative coupling strategy.
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http://dx.doi.org/10.1002/anie.202418141 | DOI Listing |
Int J Biol Macromol
September 2025
Environmental Science and Engineering, Tianjin University, Tianjin, 300350, PR China.
Stable, treatment-resistant Cu complexes in practical wastewater are frequently neglected. Positively charged lysozyme amyloid fibrils (AF), however, exhibit unexplored potential for their adsorption. This study engineered an amyloid fibril-chitosan composite (AF-CS) xerogel and evaluated its adsorption performance in three systems: free Cu, Cu-Citrate binary, and Cu-EDTA binary.
View Article and Find Full Text PDFMethods
September 2025
Heinrich Heine University Düsseldorf, Faculty of Mathematics and Natural Sciences, Institute of Physical Biology, Universitätsstr. 1, 40225 Düsseldorf, Germany; Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich, Jülich, Germany; Jülich Ce
Many membrane proteins, including G protein-coupled receptors (GPCRs), are susceptible to denaturation when extracted from their native membrane by detergents. Therefore, alternative methods have been developed, including amphiphilic copolymers that enable the direct extraction of functional membrane proteins along with their surrounding lipids. Among these amphiphilic copolymers, styrene/maleic acid (SMA) and diisobutylene/maleic acid (DIBMA) polymers have been extensively studied.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
State Key Laboratory of Physical Chemistry of Solid Surfaces, Key Laboratory of Chemical Biology of Fujian Province, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
The enantioselective construction of quaternary carbon stereocenters bearing amine functionalities represents a significant challenge in organic synthesis despite their prevalence in pharmaceutically active compounds. Herein, we report a versatile metallaphotoredox platform for the asymmetric incorporation of amine fragments onto quaternary carbons via coupling of alkene-tethered aryl bromides with readily available α-silylamines. This transformation proceeds under mild conditions without requiring organometallic reagents or stoichiometric reductants.
View Article and Find Full Text PDFJ Mater Chem B
September 2025
School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia 4072, Australia.
Surface modification of poly(ε-caprolactone) (PCL) to facilitate interactions with high pI proteins is a strategy used to enhance 3D PCL scaffolds for tissue engineering applications. The approach of the current study was to firstly optimise the surface modification on 2D films and then apply to 3D scaffolds. Melt-pressed PCL films were grafted with 2-aminoethyl methacrylate gamma radiation induced grafting to introduce amine functional groups to the substrate surfaces.
View Article and Find Full Text PDFOrg Lett
September 2025
School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China.
Current research on artificial aldolases predominantly centers on aldehyde substrates with relatively limited exploration of ketone substrates. Here, we report the creation of a novel artificial aldolase based on apo-myoglobin by embedding an organocatalytic secondary amine cofactor in the protein's distal pocket. The designer enzyme exhibits good to excellent enantioselectivities (up to 97.
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