A new chiral tethered 8-quinolinol-based ligand class is developed. The binuclear titanium complex of the ligand operates through a novel mechanism allowing for the regio- and stereoselective epoxidation of primary and tertiary homoallylic alcohols (up to 98% ee), as well as first examples of 2-allylic phenols (up to 92% ee). The new catalyst system also promotes the asymmetric oxidation of γ-hydroxypropyl sulfides giving an important class of chiral sulfoxides that have been inaccessible to date (up to 95% ee).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/jacs.5b11429 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Nonprecious Triple-Atom Catalysts with Ultrahigh Activity for Electrochemical Reduction of Nitrate to Ammonia: A DFT Screening.
ACS Appl Mater Interfaces
January 2025
Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR 999077, China.
Electrochemical nitrate reduction to ammonia (NORR) is promising to not only tackle environmental issues caused by nitrate but also produce ammonia at room temperatures. However, two critical challenges are the lack of effective electrocatalysts and the understanding of related reaction mechanisms. To overcome these challenges, we employed first-principles calculations to thoroughly study the performance and mechanisms of triple-atom catalysts (TACs) composed of transition metals (including 27 homonuclear TACs and 4 non-noble bimetallic TACs) anchored on N-doped carbon (NC).
View Article and Find Full Text PDFLayered double hydroxide modified bismuth vanadate as an efficient photoanode for enhancing photoelectrochemical water splitting.
Mater Horiz
January 2025
Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, 441-8580, Aichi, Japan.
Photoelectrochemical (PEC) water splitting has attracted significant interest as a promising approach for producing clean and sustainable hydrogen fuel. An efficient photoanode is critical for enhancing PEC water splitting. Bismuth vanadate (BiVO) is a widely recognized photoanode for PEC applications due to its visible light absorption, suitable valence band position for water oxidation, and outstanding potential for modifications.
View Article and Find Full Text PDFCr-MOF composited with facet-engineered bimetallic alloys for inducing photocatalytic conversion of CO to CH.
Chem Commun (Camb)
January 2025
Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, China.
The design of efficient photocatalysts is crucial for photocatalytic CO reduction. This study developed photocatalysts based on MIL-101(Cr) composited with a facet-engineered Pt/Pd nanoalloy (PPNA). Photocatalytic performance evaluations show that MIL-101(Cr) loaded with PPNA exposing {111} facets, namely M-A(111), exhibits a CO to CH conversion rate of 9.
View Article and Find Full Text PDFFacile Aqueous Route to Large-Scale Superhydrophilic TiO-Incorporated Graphitic Carbon Nitride-Coated Ni(OH) and NiP Nano-Architecture Arrays as Efficient Electrocatalysts for Enhanced Hydrogen Production.
Langmuir
January 2025
Department of Chemistry, Faculty of Science, University of Kurdistan, Pasdaran Boulevard, Sanandaj 66177-15175, Iran.
Water splitting by an electrochemical method to generate hydrogen gas is an economic and green approach to resolve the looming energy and environmental crisis. Designing a composite electrocatalyst having integrated multichannel charge separation, robust stability, and low-cost facile scalability could be considered to address the issue of electrochemical hydrogen evolution. Herein, we report a superhydrophilic, noble-metal-free bimetallic nanostructure TiO/NiP coated on graphitic polyacrylonitrile carbon fibers (g-C/TiO/NiP) using a facile hydrothermal method followed by phosphorylation.
View Article and Find Full Text PDFOne-dimensional Branched PdAg Nanoalloy Rich in Defects for Boosting Glycerol and Ethanol Oxidation.
Chemistry
January 2025
Lingnan Normal University, School of Chemistry and Chemical Engineering, CHINA.
The development of Pd-based bimetallic nanoalloys (NAs) with abundant active sites for achieving highly efficient electrocatalysis in alcohol oxidation deserves continuous attention. Herein, we utilized a facile visible-light-assisted liquid-phase method involving adjusting reaction time to generate active sites, successfully synthesizing one-dimensional (1D) PdAg NAs rich in defects. The optimized 1D PdAg NA exhibits remarkable electrochemical activity, stability, and antipoisonous properties in glycerol oxidation reaction (GOR) and ethanol oxidation reaction (EOR), far exceeding pure Pd and commercial Pd/C catalysts.
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!