α-Amino acid derivatives are key components of the molecules of life. The synthesis of α-amino carbonyl/carboxyl compounds is a contemporary challenge in organic synthesis. Herein, we report a practical method for the preparation of α-amino acid derivatives via direct hydrative amination of activated alkynes under mild conditions, relying on sulfinamides as the nitrogen source. Computational studies suggest that the reaction is enabled by a new type of sulfonium [2,3]-sigmatropic rearrangement.
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http://dx.doi.org/10.1002/anie.202212399 | DOI Listing |
MethodsX
June 2025
Department of Pharmacology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan.
Proteic plasmid addiction systems, such as the control of cell death (Ccd), have been used for efficient plasmid DNA recombination. The CcdB toxin, which has a relatively long sequence of 309 bp, has been the predominant choice for this purpose. However, the need for shorter peptide toxins has emerged.
View Article and Find Full Text PDFFront Vet Sci
January 2025
Department of Microbiology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China.
Introduction: Cormorants, as protected wild animals by the State Forestry Administration of China, have a broad distribution across China. Previous studies have shown that they can be infected with multiple viruses in the , , , and families. There is limited knowledge about the other viruses that cormorants may carry and infect.
View Article and Find Full Text PDFFront Plant Sci
January 2025
Key Laboratory of Innovation of Forage Efficient Production Model, Ministry of Agriculture and Rural Affairs, Yinchuan, Ningxia Hui Autonomous Region, China.
Introduction: Salt stress significantly affects plant growth, and Na has gained attention for its potential to enhance plant adaptability to saline conditions. However, the interactions between Na, plants, and rhizosphere bacterial communities remain unclear, hindering a deeper understanding of how Na contributes to plant resilience under salt stress.
Methods: This study aimed to investigate the mechanisms through which Na promotes alfalfa's adaptation to salt stress by modifying rhizosphere bacterial communities.
J Microbiol Biotechnol
December 2024
School of Biotechnology and Key Laboratory of Industrial Biotechnology Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, P.R. China.
Gamma-aminobutyric acid (GABA), a non-proteinogenic amino acid, exhibits diverse physiological functions and finds extensive applications in food, medicine, and various industries. Glutamate decarboxylase (GAD) can effectively convert L-glutamic acid (L-Glu) or monosodium glutamate (MSG) into GABA. However, the low food-grade expression of GAD has hindered large-scale GABA production.
View Article and Find Full Text PDFKorean J Gastroenterol
January 2025
Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, China.
Background/aims: This study assessed the long-term efficacy and safety of tenofovir alafenamide (TAF) in real-world settings.
Methods: Patients who were candidates for TAF treatment and were followed up at 12-week intervals over 192 weeks were enrolled in this study.
Results: One hundred and forty-four patients (50 treatment-naive and 94 treatment-experienced) were included in this study.
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