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Corticoids have found their way into the globe of sports, due to their anti-inflammatory properties, and have often found to be added to dietary supplements for illegally improving the effectiveness of their products. Earlier studies describe the detection of corticoids in several matrices, but this can be an incessant and continuous process as long because the doping practices continue. In this study, we report a technique to verify concurrently 44 of the foremost commonly abused synthetic corticoids (including chiral analogs) in equine plasma supported chiral liquid chromatography-electrospray ionization mass spectrometry. Polysaccharide -cellulose-5 column was used for chromatographic separation with a gradient mode. The validation studies were also meted out by using equine plasma so as to judge the suitability of the strategy. Detection limits were determined between 0.01 and 0.05 ng/mL and therefore the limit of quantification was between 0.1 and 0.5 ng/mL. Recovery and matrix effect on the analytes was further assessed. Since the developed method was ready to separate the corticoids and to differentiate chiral analogs at very low levels (in picograms), this separation techniques may be employed for the determination (confirmatory analysis) of the corticoids in the forensic and anti-doping application.
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http://dx.doi.org/10.1002/ansa.202000166 | DOI Listing |
Org Lett
September 2025
State Key Laboratory of Chemistry for NBC Hazards Protection, Beijing 102205, China.
Optically active α-aminophosphonic acids are unique analogues of α-amino acids, and numerous synthetic methods have been developed. Herein, we present a highly diastereoselective α-azidation approach to the CAMDOL-derived phosphonates, enabling ready access to 27 diverse α-azidophosphonates with defined chirality in up to 85% yield and more than 99:1 dr. Late-stage transformations through the Staudinger reaction or click reaction efficiently delivered the related pharmacological α-aminophosphonic acids or the unique α-triazolylphosphonate derivative, respectively.
View Article and Find Full Text PDFCarbohydr Res
August 2025
Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, OH, 43606, United States. Electronic address:
Mycothiol cysteine ligase (MshC) from Mycobacterium tuberculosis (TB) plays a vital role in the biosynthesis of mycothiol (MSH) and can serve as a potential target for designing novel anti-mycobacterial compounds. Herein we report the synthesis of MshC substrate GlcN-Ins and substrate-based analogues as potential inhibitors for MshC. We obtained IC values in the micromolar range for our substrate analogues; comparable to other reported inhibitors.
View Article and Find Full Text PDFChem Sci
August 2025
South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology Guangzhou 510640 China
Cyclic oligomers with multiple redox centers are ideal models for intramolecular electron transfer processes, as they feature well-defined spatial geometries and degenerate energy states. The design and synthesis of such structures with strongly interacting monomers, however, remains a significant challenge. Here, we report a one-pot synthesis of an acetylene-bridged ferrocene macrocycle (9) using alkyne metathesis, with a remarkable 43% isolated yield.
View Article and Find Full Text PDFNanophotonics
August 2025
Departament de Física de la Matèria Condensada, Universitat de Barcelona, 08028 Barcelona, Spain.
We present a systematic investigation of the optical response to circularly polarized illumination in twisted stacked plasmonic nanostructures. The system consists in two identical, parallel gold triskelia, centrally aligned and rotated at a certain angle relative to each other. Sample fabrication was accomplished through a novel multilevel high-resolution electron beam lithography.
View Article and Find Full Text PDFActa Pharm Sin B
August 2025
Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu 610041, China.
This study aimed to identify ideal pharmaceutical candidates featuring strong anti-HIV-1 activity and desirable drug-like characteristics. Our endeavor involved the implementation of a bioisosterism strategy, leading to the discovery of an assemblage of halogen-containing biphenyl-diarylpyrimidines as potent HIV-1 non-nucleoside reverse transcriptase inhibitors. Notably, compound demonstrated exceptional efficacy against both WT HIV-1 (EC = 1.
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