Two unidentified chlorinated volatiles X and Y were detected in headspace extracts of the fungus Geniculosporium. Their mass spectra pointed to the structures of a chlorodimethoxybenzene for X and a dichlorodimethoxybenzene for Y. The mass spectra of some constitutional isomers for X and Y were included in our databases and proved to be very similar, thus preventing a full structural assignment. For unambiguous structure elucidation all possible constitutional isomers for X and Y were obtained by synthesis or from commercial suppliers. Comparison of mass spectra and GC retention times rigorously established the structures of the two chlorinated volatiles. Chlorinated volatiles are not very widespread, but brominated or even iodinated volatiles are even more rare. Surprisingly, headspace extracts from Streptomyces chartreusis contained methyl 2-iodobenzoate, a new natural product that adds to the small family of iodinated natural products.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3869313 | PMC |
| http://dx.doi.org/10.3762/bjoc.9.311 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Exceptional Resistance to Chlorine-Induced Photocatalytic Poisoning via Vacuum UV Irradiation.
Environ Sci Technol
March 2025
School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China.
Catalyst deactivation poses a significant challenge in environmental remediation, especially for the photocatalytic oxidation of chlorinated volatile organic compounds (Cl-VOCs). In this study, a functional flower-like TiO@Mn/rGO (FTMG) catalyst coupled with a vacuum ultraviolet (VUV) lamp was used as a novel photocatalytic oxidation (VUV-PCO) system for chlorobenzene (CB) oxidation. In this system, more than 80% of CB was efficiently oxidized at a high w8 hly space velocity of 600,000 g h, which was a 6.
View Article and Find Full Text PDFDistribution and migration of pollutant elements during municipal solid waste incineration fly ash melting in a pilot-scale furnace.
J Environ Manage
March 2025
Ningbo Innovation Center, Zhejiang University, Ningbo, 315100, China; State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China.
The melting/vitrification method is a promising approach for the large-scale, rapid, and harmless disposal of municipal solid waste incineration fly ash (MSWIFA). However, this method inevitably involves challenges related to secondary pollution. A 2 t/d pilot-scale melting furnace was built to investigate the distribution and migration of pollutant components-specifically heavy metals, sulfur, and chloride-within secondary fly ash (SFA), vitrified slag (VS), and ash in the flue gas channel (AFC) during the melting process of MSWIFA.
View Article and Find Full Text PDFRationally Fabricated Ce-Mn@ZrO-SO Catalyst Boosts the Efficient Destruction of Chlorobenzene with SO Impurity: Synergy of Surface SO and Acidic Sites.
Environ Sci Technol
March 2025
State Key Laboratory of Multiphase Flow in Power Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi PR China.
The catalytic deactivation caused by SO impurity remains a great challenge in the efficient destruction of industrial chlorinated volatile organic compounds (CVOCs). Herein, a Ce-Mn@ZrO-SO catalyst with a Ce-O-Mn active system and ZrO-SO protective layer was rationally engineered, which exhibits superior activity for chlorobenzene (CB) and SO cotreatment at 228 °C, achieving 90% CB mineralization─over 80% higher than that of the CeO catalyst. In situ characterization and theoretical calculation results reveal that the SO groups not only inhibit the adsorption of SO molecules through steric hindrance and electrostatic repulsion but also act as the Brønsted acid sites (BAS) to promote C-Cl cleavage of chlorobenzene (CB) and accelerate the desorption of Cl radicals as inorganic chlorine (HCl and Cl).
View Article and Find Full Text PDFChlorine-Tolerant Chlorobenzene Combustion over Mullite Catalysts via Constructing Ru-O-Mn Sites.
Environ Sci Technol
February 2025
Innovation Institute of Carbon Neutrality, State Key Laboratory of Advanced Special Steel, International Joint Laboratory of Catalytic Chemistry, Department of Chemistry, College of Sciences, Shanghai University, 200444 Shanghai, China.
The catalytic combustion of chlorine-containing volatile organic compounds (CVOCs) at low temperatures still faces chlorine poisoning challenges. Herein, chlorine-tolerant chlorobenzene combustion over manganese-based mullite (SmMnO) catalysts has been originally demonstrated via constructing rich Ru-O-Mn sites, engineered from the doping of ruthenium (Ru) and the subsequent etching of samarium (Sm). Such catalysts exhibited 90% activity for chlorobenzene combustion at 258 °C and maintained about 80% activity after the 30 h stability test.
View Article and Find Full Text PDFSynthetic structure effect of CuO/NaZSM-5 on the catalytic oxidation of chlorinated aromatic hydrocarbon.
Dalton Trans
March 2025
College of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China.
Petrochemical, tobacco, and pharmaceutical processing industries extensively use chlorinated volatile organic compounds (CVOCs) as solvents and lubricants, which cause significant environmental hazards. Zeolite is a highly efficient catalytic material for low-temperature degradation of CVOCs, with strong practical applications in industry. In this study, we used chlorobenzene (CB) as a model pollutant to introduce two innovative modified zeolites: a hollow zeolite-supported CuO catalyst (CuO/Z-HO) and an -grown zeolite catalyst on the surface of the CuO nanosheet (CuO/Z-SC).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!