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An unprecedented cross-dehydrogenative-coupling (CDC) reaction of saturated aldehyde β-C-H with arenes to form cinnamaldehydes via the cleavages of four C-H bonds has been developed. The reaction possesses complete E-stereoselectivity for the C═C double bond. The protocol is featured by atom and step economy, mild reaction conditions, and convenient operation.
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http://dx.doi.org/10.1021/acs.orglett.9b00695 | DOI Listing |
Angew Chem Int Ed Engl
September 2025
College of Polymer Science and Engineering, State Key Laboratory of Advanced Polymer Materials, Sichuan University, Chengdu, 610065, P.R. China.
The metal-nitrogen chelated species, MN, have shown promise as efficient electrocatalysts for nitrate reduction, yet the symmetric arrangement of N atoms results in suboptimal adsorption affinity toward reaction substrates and intermediates. The current approaches to breaking the symmetry of MN suffer from inaccuracy and inhomogeneity because of the lack of strategies stemming from molecular design aspects. Herein, we report the construction of symmetry-broken MNO sites in coordination polymers via sequential coordination-covalent control in a one-pot reaction.
View Article and Find Full Text PDFBiomed Chromatogr
October 2025
Department of Rehabilitation, Nan'ao People's Hospital, Shenzhen, China.
Chrysotobibenzyl, a bioactive ingredient from Dendrobium chrysotoxum, exhibits potent anti-tumor activity. However, its metabolic profiles remain unelucidated. This study aimed to disclose the metabolic fates of chrysotobibenzyl using human liver fractions.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing, 210042, China.
Developing the efficient C─H bond activation carboxylation processes for furoic acid (FA) represents a critical technological challenge in achieving atom-economical synthesis of 2,5-furandicarboxylic acid (FDCA). Despite notable advancements in this field, the inherent contradiction between the high reactivity of furan rings and the chemical inertness of C─H bonds poses substantial technical bottleneck for achieving controllable C─H carboxylation under mild conditions. Herein, we report a high lattice-distorted MnOx catalyst with surface trench-like structures, wherein the Mn-O-conjugated configurations and electron-rich Mn cooperatively drive FA dehydrogenation and carbon radical reduction, inducing the free radical evolution process (FA→carbon-centered FA radical→FA carbanion), then coupled with solvent-polarized CO to accelerate the carboxylation process.
View Article and Find Full Text PDFBiol Methods Protoc
June 2025
LARN Laboratory (LARN-NARILIS/NISM), University of Namur, Namur, B-5000, Belgium.
The precise determination of viral titers in virological studies is a critical step to assess the infectious viral concentration of a sample. Although conventional titration methods, such as endpoint dilution or plaque forming units are the gold standards, their widespread use for screening experiments remains limited due to the time-consuming aspect and resource-intensive requirements. This study introduces a rapid and user-friendly high-throughput screening assay for evaluating viral titers.
View Article and Find Full Text PDFOrg Biomol Chem
September 2025
Department of Chemistry, Indian Institute of Engineering Science and Technology (IIEST), Shibpur, P O- Botanic Garden, Howrah- 711103 (WB), India.
A simple yet efficient method involving a visible-light-induced direct, regioselective chalcogenation of indoloquinoxaline derivatives has been developed. Thiols, disulfides and diselenides were found to be efficient as chalcogenating agents in the presence of Rose Bengal as a photosensitizer. This photoinduced C-H functionalization a cross-dehydrogenative-coupling (CDC) protocol was carried out at ambient temperature under an open-air atmosphere.
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