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Highly strained [3.2.1] bicyclic twisted amide and corresponding amidium were synthesized for the first time through Ag(I)-mediated halide abstraction. After initial lactamization attempts failed, a second-generation strategy was devised to target amidium via intramolecular alkylation. The 3,4-dihydroisoquinolone cyclization precursor was regioselectively prepared via a Rh(III)-catalyzed C-H activation/annulation reaction. After Ag(I)-assisted cyclization, the [3.2.1] bicyclic framework of amidium was confirmed by X-ray crystallography and enabled full solution characterization of twisted amide .
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http://dx.doi.org/10.1021/acs.joc.4c01192 | DOI Listing |
Acta Crystallogr C Struct Chem
September 2025
Chemistry Department, United States Naval Academy, 572 Holloway Rd, Annapolis, MD 21402, USA.
The crystal structures of N-(furan-3-yl)benzamide, CHNOS, FAP, and N-(thiophen-3-yl)benzamide, CHNO, TAP, were determined by single-crystal X-ray diffraction at 173 K. The molecular units in both structures consist of three planar regions: a five-membered aryl ring, an amide linkage, and a phenyl ring. Both compounds crystallize in the space group P1 with no solvent in the unit cell.
View Article and Find Full Text PDFInorg Chem
July 2025
Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
Two-coordinate carbene-metal-amide (CMA) complexes have shown rich photophysical properties endowed by their tunable electronic structures and flexible conformations, which can be exploited for optoelectronic applications. Different from most of the studies on mononuclear CMA complexes, we herein report a series of dinuclear CMA-type gold(I) complexes, namely , , , and , using 1,1'-bicarbazole as a bridging donor ligand. Single-crystal X-ray structures reveal different conformations in terms of the torsion angles between the carbene and amide ligands that are affected by the steric effect of the carbene ligands.
View Article and Find Full Text PDFSci Total Environ
August 2025
ARC Training Centre for the Transformation of Australia's Biosolids Resource, RMIT University, Bundoora, VIC, Australia; Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, Victoria 3001, Australia. Electronic address:
This study investigates the influence of organic matter and extracellular polymeric substances (EPS) on the rheological properties and dewaterability of diverse sludge types. Eight waste activated sludge and eleven anaerobically digested sludge samples were collected from eleven full-scale wastewater treatment plants across Australia. Rheological measurements were performed at native and at uniform total solids concentration (TS) of 4.
View Article and Find Full Text PDFJ Cell Mol Med
May 2025
Department of Molecular Biology and Genetics, Faculty of art and Science, Tokat Gaziosmanpasa University, Tokat, Türkiye.
Pancreatic cancer is one of the deadliest malignant tumours worldwide. Despite the developments in the treatments of pancreatic cancer, survival rates remain at a low level, and the mechanisms underlying the aggressive course of the cancer are not fully understood. VISTA is an immune checkpoint and has recently become a significant target in cancer treatment; however, the roles of VISTA in the development of pancreatic cancer have largely remained unknown.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
June 2025
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China.
Fluorophore-ligand conjugates play a pivotal role in cellular imaging, providing high target specificity. However, simultaneously achieving conjugates with high brightness and ligand-targeting diversity presents significant challenges. Traditional strategies often require complex, multistep modifications for fluorophore enhancement and ligand conjugation.
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