98%
921
2 minutes
20
Herein, a palladium-catalyzed coupling of gem-iododiborylalkanes with electron-rich olefins to access β,β-diboryl ketones and aldehydes under mild conditions is reported. This method exhibits broad substrate scope and excellent functional group tolerance. Mechanistic studies support a distinctive pathway involving gem-diboryl carbon-centered radicals and a Pd(0)/Pd(I) catalytic cycle, without the formation of Pd(II) intermediates. This protocol provides a new platform for accessing synthetically valuable gem-diboryl carbonyl compounds and expands the reactivity profile of organoboron-based radical transformations.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1002/advs.202508566 | DOI Listing |
J Org Chem
September 2025
Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China.
Halogen atom transfer (XAT) is a pivotal strategy for generating carbon-centered radicals in organic chemistry, yet current methodologies often rely on toxic tin-based reagents or inefficient organosilanes. This study explores diazaphosphinyl (-heterocyclic phosphinyl, NHP) radicals as new halogen abstractors, leveraging their nucleophilic and halophilic properties. We synthesized a series of NHP-X (X = Cl or Br) compounds, systematically determining their P-X bond energies and related redox potentials.
View Article and Find Full Text PDFJ Hazard Mater
August 2025
State Key Laboratory of Water Pollution Control and Green Resource Recycling, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 2
In this study, a novel riboflavin-mediated nanoscale zero-valent iron/peracetic acid system (RF/nZVI/PAA) was constructed to increase the removal of norfloxacin. Under the optimal conditions (PAA=10 mg/L, nZVI=20 mg/L, RF= 1 mg/L, and initial pH =4), complete norfloxacin removal was achieved within 30 min, accompanied by a 70 % mineralization rate. Electron paramagnetic resonance spectroscopy combined with quenching experiments quantitatively identified hydroxyl radical, carbon-centered radical, and singlet oxygen as the predominant reactive oxidative species (ROS) responsible for norfloxacin removal, with contributions of 42 %, 44 %, and 10 %, respectively.
View Article and Find Full Text PDFEnviron Toxicol Chem
September 2025
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012China.
Environmental Persistent Free Radicals (EPFRs) in fine atmospheric particulate matter (PM2.5) can help the production of reactive oxygen species, leading to oxidative damage to people. In this study, Electron Spin Resonance (ESR) spectroscopy was utilized to detect EPFRs in PM2.
View Article and Find Full Text PDFMolecules
August 2025
Departamento de Química Orgánica, Instituto Químico para la Energía y el Medioambiente (IQUEMA), Universidad de Córdoba, E-14071 Córdoba, Spain.
The role of -benzoquinone (BQ) as a photocatalyst in the synthesis of solketal under UV irradiation has been studied, along with the combined use of BQ/TiO P25 as a photocatalytic system for the process. The presence of the O/O redox couple is essential for the reaction to take place. However, experiments with -benzoquinone as a superoxide radical scavenger failed, with the opposite effect of enhancing the reaction being observed.
View Article and Find Full Text PDFJ Phys Chem A
September 2025
MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, Guangdong Provincial Key Laboratory of Laser Life Science, Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, School of Optoelectronic Science and Engineering, South China Normal Un
In this study, we tackle the challenge of synthesizing nitrogen-containing bicyclic compounds in the gas phase, a topic of considerable interest to interstellar chemistry and combustion science. We specifically explore the bimolecular reaction between the -pyridinyl radical (CHN•), a quintessential nitrogen-containing monocyclic carbon-centered aromatic radical, and the interstellar molecule acrylonitrile (CHN) in a resistance-heated silicon carbide (SiC) microreactor. Utilizing advanced molecular beam-sampled synchrotron VUV photoionization mass spectrometry (SVUV-PIMS), we detected the formation of CHN species at 1100 K.
View Article and Find Full Text PDF