An efficient and operationally simple synthesis of fluoroalkanes by deoxygenative hydrofluorination of carbonyl compounds via their tosylhydrazone surrogates is reported. The reaction can be carried out in a one-pot procedure directly from carbonyl compounds.
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http://dx.doi.org/10.1039/c3cc00122a | DOI Listing |
J Am Soc Mass Spectrom
January 2025
Suntory Institute for Bioorganic Research, Suntory Foundation for Life Sciences, 8-1-1 Seikadai, Seika-Cho, Soraku-Gun, Kyoto 619-0284 Japan.
In this study, we analyzed purine derivatives using multimatrix variation matrix-assisted laser desorption ionization mass spectrometry (MALDI MS) with α-cyano-4-hydroxycinnamic acid (CHCA), 1,5-diaminonaphtalene (DAN), 5-formylsalicylic acid (FSA), and 5-nitrosalicylic acid (NSA) as matrices. Further, we focused on the abstraction/attachment of hydrogen from/to analytes and detected [M - H], [M + 2H] and/or [M + 3H] in MALDI MS spectra of compounds containing nitrogen and/or carbonyl oxygen. Although [M - H] generation of purine compounds in MALDI MS with conventional matrices was challenging, NSA-MALDI MS effectively yielded the [M - H]species of purine derivatives compared with CHCA, FSA, and DAN, and the [M - H]/[M + H] ratios reflected their structures, such as the substituting groups and positions.
View Article and Find Full Text PDFNanoscale
January 2025
State Key Laboratory of Biobased Fiber Manufacturing Technology, Tianjin Key Laboratory of Pulp and Paper, China Light Industry Key Laboratory of Papermaking and Biorefinery, Tianjin University of Science and Technology, No. 29, 13th Street, TEDA, Tianjin 300457, P. R. China.
The remarkable catalytic activity, optical properties, and electrochemical behavior of nanomaterials based on noble metals (NM) are profoundly influenced by their physical characteristics, including particle size, morphology, and crystal structure. Effective regulation of these parameters necessitates a refined methodology. Lignin, a natural aromatic compound abundant in hydroxyl, carbonyl, carboxyl, and sulfonic acid groups, has emerged as an eco-friendly surfactant, reducing agent, and dispersant, offering the potential to precisely control the particle size and morphology of NM-based nanomaterials.
View Article and Find Full Text PDFAnal Chem
January 2025
Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States.
This study describes a microfluidic thread-based analytical device (μTAD) capable of in situ mass spectrometric analysis for continuous flow reaction monitoring. Organic reaction screening is foundational to drug discovery. Microfluidic devices are of special interest here because they provide continuous reaction monitoring with advantages such as the use of smaller reagent volumes and short analysis times.
View Article and Find Full Text PDFMetallomics
December 2024
Department of Environmental and Physical Sciences, Faculty of Science.
Non-enzymatic glycation is the chemical reaction between the amine group of an amino acid and the carbonyl group of a reducing sugar. The final products of this reaction, advanced glycation end-products (AGEs), are known to play a key role in aging and many chronic diseases. The kinetics of the AGE formation reaction depends on several factors, including pH, temperature, and the presence of prooxidant metals, such as iron and copper.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
College of Food Science and Engineering, Shanxi Agricultural University, Taigu 030801, China. Electronic address:
Marinating is a crucial stage in meat processing. However, traditional marinating takes a long time and is prone to nutrient loss. Pulsed electric field (PEF) technology, an innovative non-thermal processing method, has been shown to improve the efficiency of meat marinating.
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