The facile generation of the α-acyloxy carboxamide radical is hereby reported for the first time, utilizing a photoredox catalyzed reaction of Passerini adducts synthesized using a 4-formyl-1,4-dihydropyridine as the carbonyl component. This radical effectively engages in a Giese reaction with a range of olefins, ultimately leading to the synthesis of novel Passerini-derived products not previously amenable to direct aldehyde-based transformations. Consequently, the resulting strategy, developed both in batch and in flow, offers a promising opportunity to expand the chemical space accessible through the Passerini reaction, virtually incorporating "impossible" aldehydes.
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http://dx.doi.org/10.1002/chem.202402175 | DOI Listing |
ACS Nano
December 2024
Faculty of Materials Science, Shenzhen MSU-BIT University, Shenzhen 518100, P. R. China.
Protein hydrolysis targeted chimeras (PROTACs) represent a different therapeutic approach, particularly relevant for overcoming challenges associated with traditional small molecule inhibitors. These challenges include targeting difficult proteins that are often deemed "undruggable" and addressing issues of acquired resistance. PROTACs employ the body's own E3 ubiquitin ligases to induce the degradation of specific proteins of interest (POIs) through the ubiquitin-proteasome pathway.
View Article and Find Full Text PDFNPJ Regen Med
December 2024
Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, 100730, Beijing, China.
As an emerging type of pluripotent stem cells, chemically induced pluripotent stem cells (CiPSCs) avoid the risks of genomic disintegration by exogenous DNAs from viruses or plasmids, providing a safer stem cell source. To verify CiPSCs' capacity to differentiate into retinal organoids (ROs), we induced CiPSCs from mouse embryonic fibroblasts by defined small-molecule compounds and successfully differentiated the CiPSCs into three-dimensional ROs, in which all major retinal cell types and retinal genes were in concordance with those in vivo. We transplanted retinal photoreceptors from ROs into the subretinal space of retinal degeneration mouse models and the cells could integrate into the host retina, establish synaptic connections, and significantly improve the visual functions of the murine models.
View Article and Find Full Text PDFBiophys Chem
December 2024
Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China; NHC Key Laboratory of Biotechnology of Antibiotics, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China. Electronic address:
The inhibition of the TIGIT/PVR interaction demonstrates considerable anticancer properties by enhancing the cytotoxic activity of natural killer (NK) and CD8+ T cells. However, the development of small molecule inhibitors that target TIGIT is currently limited. In this study, small molecules with the capacity to bind TIGIT and block the TIGIT/PVR interaction were screened through an advanced computational process, subsequently confirmed by blocking assays.
View Article and Find Full Text PDFFront Mol Biosci
December 2024
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China.
Introduction: Largemouth bass is an economically important farmed freshwater fish species that has delicious meat, no intermuscular thorns, and rapid growth rates. However, the molecular regulatory mechanisms underlying the different growth and developmental stages of this fish have not been reported.
Methods: In this study, we performed histological and transcriptomic analyses on the brain and dorsal muscles of largemouth bass at different growth periods.
Appl Spectrosc
December 2024
Zentrum für Rieskrater und Impaktforschung, Nördlingen, Germany.
In situ optical analytical spectroscopies offer great geochemical insights due to their capability to resolve the chemical composition of regolith surfaces of rocky celestial bodies. The use of suitable calibration targets improves the precision of mineral determination, which is of critical importance for short-living, low-mobility landers, and enables, in special cases, determination of elemental composition. We investigate the capabilities of three space-relevant optical analytical techniques used for in situ mineralogical analysis, i.
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