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Electrochemically Driven Ugi-Azide Reaction via C(sp)-H Bond Activation of Tertiary Amines.
Org Lett
January 2025
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
An electrochemically driven Ugi-azide reaction was established via C(sp)-H bond activation of tertiary amines to prepare α-aminomethyl tetrazoles within 2.5 h under mild conditions with remarkable tolerance of various functional groups. Besides, this electrochemical strategy not only obviated the needs of iodine, metal, and exogenous oxidant but possessed potential applicability of convenient large-scale synthesis.
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J Org Chem
January 2025
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
The selective oxidative cleavage and functionalization of C(OH)-C bonds in tertiary alcohols harbor immense feasibility in organic synthesis and enable the production of high value-added chemicals from renewable biomass. However, it remains a challenge, owing to the inherent kinetic inertness and thermodynamic stability of C(OH)-C bonds and the lack of C-H. Taking the huge potential and challenge of C(OH)-C bond activation and functionalization into consideration, herein, we show the first example of an inexpensive bifunctional ferric nitrate catalyst for catalytic direct oxidation of structurally distinct tertiary alcohols to esters with environmentally benign molecular oxygen as an oxidant and MeOH as a solvent, without the assistance of any additives.
View Article and Find Full Text PDFSynthesis, characterization, anticancer, antibacterial and antifungal activities of nanocomposite based on tertiary metal oxide FeO@CuO@ZnONPs, starch, ethylcellulose and collagen.
Int J Biol Macromol
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Department of Hematology/Oncology, Yousef Abdulatif Jameel Scientific Chair of Prophetic Medicine Application, Faculty of Medicine, King Abdulaziz University, Jeddah 21589, Saudi Arabia. Electronic address:
This study aimed to synthesize a nanocomposite based on tertiary metal oxide FeO@CuO@ZnONPs, starch, ethylcellulose, and collagen, as well as evaluate its biological activities. The prepared nanocomposites were characterized using physicochemical analysis, which included FTIR, XRD, and DLS. Additionally, topographical analysis using FI-SEM, EDX, mapping, HR-TEM, and SAED affirmed the molecular structure and nanosized of formulated nanocomposites.
View Article and Find Full Text PDFA comprehensive assessment of membrane bioreactor contaminant removal efficacy through analytical chemistry, fish exposures, and microbiome characterization.
Environ Toxicol Chem
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Aquatic Toxicology Laboratory, St Cloud State University, Minnesota, USA.
Treated municipal wastewater effluent is an important pathway for Contaminants of Emerging Concern (CEC) to enter aquatic ecosystems. As the aging wastewater infrastructure in many industrialized countries requires upgrades or replacement, assessing new treatment technologies in the context of CEC effects may provide additional support for science-based resource management. Here, we used three lines of evidence, analytical chemistry, fish exposure experiments, and fish and water microbiome analysis, to assess the effectiveness of membrane bioreactor treatment (MBR) to replace traditional activated sludge treatment.
View Article and Find Full Text PDFA hypoxia-targeting and hypoxia-responsive nano-probe for tumor detection and early diagnosis.
Biomater Sci
January 2025
Zhejiang Key Laboratory of Smart BioMaterials, and College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China.
Accurate imaging of tumor hypoxia is critical for early cancer diagnosis and clinical outcomes, highlighting the great need for its detection specificity and sensitivity. In this report, we propose a probe (HTRNP) that simultaneously has hypoxia-targeting and hypoxia-responsive capabilities to enhance the tumor hypoxia imaging efficiency. HTRNP was successfully prepared through the encapsulation of Pt(II)-tetrakis(pentafluorophenyl)porphyrin (PtPFPP), which exhibits hypoxia-dependent phosphorescence, within the amphiphilic block copolymer OPDMA-PF, which has hypoxia-targeting tertiary amine -oxide moieties and hydrophobic perfluorobenzene ring structures, which highly improved the loading content and water solubility of PtPFPP.
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