The enantioselective C-H alkylation of 8-ethylquinolines with enones or acrolein using a Rh catalyst and a chiral carboxylic acid is described. Under mild reaction conditions, a binaphthyl-based chiral carboxylic acid enables the enantioselective cleavage of the 8-ethylquinoline C(sp)-H bond. The obtained results demonstrate the utility of the combination of a high-valent group 9 metal catalyst and a chiral carboxylic acid for the enantioselective C(sp)-H activation and the subsequent C-C bond formation.
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http://dx.doi.org/10.1021/acs.orglett.0c02872 | DOI Listing |
Environ Sci Technol
January 2025
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, P. R. China.
Membrane distillation (MD) efficiently desalinizes and treats high-salinity water as well as addresses the challenges in handling concentrated brines and wastewater. However, silica scaling impeded the effectiveness of MD for treating hypersaline water and wastewater. Herein, the effects of humic acid (HA) on silica scaling behavior during MD are systematically investigated.
View Article and Find Full Text PDFEnviron Sci Technol
January 2025
Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China.
The traditional treatment of toxic and refractory copper(II)-ethylenediaminetetraacetic acid chelate (Cu(II)-EDTA) in electroless effluents often generates hazardous waste and secondary nitrogen-containing pollutants without maximizing the resource recovery. This study demonstrates a facile strategy to simultaneously recover Cu and EDTA ligands from Cu(II)-EDTA electroless effluent with commercially available metallic Cu and formaldehyde. In this strategy, metallic Cu is used to activate formaldehyde, a prevalent yet often overlooked cocontaminant in Cu(II)-EDTA effluents, to produce highly reductive hydrogen radical (H), which in situ decomplex Cu(II)-EDTA, reduces the central Cu(II) into metallic Cu, and release EDTA ligand.
View Article and Find Full Text PDFInorg Chem
January 2025
Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Molecular Sciences, Henan University, Kaifeng, Henan 475004, P. R. China.
Three cases of aminobenzoic acid hybrid polyoxotungstates, Na(HO)[(HPWO) (OCCHNH)]·7HO (), K(HO)[(AsWO)(OCCHNH)]·4HO (), and [(HN(CH)]Na(HO)[(SbWO) (OCCHNH)]·7HO (), were successfully synthesized. This is the first report of the successful assembly of the hexanuclear {XW} (X = HP, As, or Sb) clusters and organic carboxylic acid (para aminobenzoic acid) ligands. All three hybrids feature a common {XW} unit composed of a six-membered {WO} octahedral ring capped by one {XO} trigonal pyramid.
View Article and Find Full Text PDFRSC Adv
January 2025
Key Laboratory of Protection, Development and Utilization of Medicinal Resources in Liupanshan Area (Ningxia Medical University), Ministry of Education, School of Pharmacy, Ningxia Medical University 1160 Shengli Street Yinchuan 750004 China
The Keap1 (Kelch-like ECH-Associating Protein 1)-Nrf2 (Nuclear Factor Erythroid 2-Related Factor 2)-ARE (Antioxidant Response Element) signaling pathway plays a crucial role in the oxidative stress response and has been linked to the development and progression of various diseases. Its influence on cerebral ischemia/reperfusion (I/R) injury has garnered significant attention. In our study, we investigated the effect of compound 2, a non-covalent inhibitor of the Keap1-Nrf2 interaction, which was previously discovered by our research group.
View Article and Find Full Text PDFBMJ Open
December 2024
Rio Hortega, Valladolid University Hospital, Valladolid, Spain.
Objectives: Point-of-care testing available in prehospital settings requires the establishment of new medical decision points. The aim of the present work was to determine the cut-off of the lactate threshold that activates alert triggers for all-cause 2-day mortality.
Design: Multicentre, prospective, ambulance-based, observational study.
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