A Lewis acid catalyzed domino reaction cascades through azide-alkene cycloaddition, rearrangement, aziridine ring opening, and azomethine cycloaddition with a parent dipolarophile, resulting in 3,3'-pyrrolidinyldispirooxindoles containing four contiguous chiral stereocenters with two contiguous quaternary spirostereocenters.
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http://dx.doi.org/10.1021/ol501547p | DOI Listing |
Mol Ther Nucleic Acids
March 2025
Center for Metabolic Disease Research, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA.
Biochim Biophys Acta Mol Basis Dis
December 2024
Department of General Practice, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha 410013, Hunan, China. Electronic address:
The level of serum bilirubin is associated with the incidence of lung cancer in both smokers and non-smokers, but the specific mechanism is unknown. Bilirubin nanoparticles (BRNPs) were synthesized to explore the effects on Treg/Th17 immunity and gut microbiota in Lewis Lung Carcinoma (LLC) mice, to provide insights for the treatment of lung adenocarcinoma. 10 μg/mL BRNPs promoted apoptosis of A549, NCI-H1299 and LLC cells.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
December 2024
Jilin University College of Chemistry, State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, 2699 Qianjin Street, 130012, Changchun, CHINA.
Developing a simple and efficient catalyst system for closed-loop recycling of polymers to monomers is an essentially important but challenging task for the recycle of polymer wastes and preventing the downcycle of plastic products. Herein, we employ inexpensive, commercially available Lewis acids (LAs) to achieve closed-loop recycling in bulk through the catalytic depolymerization of aliphatic polyesters and polycarbonates. The scope of LAs is screened by thermogravimetric analysis experiments and distillation experiments.
View Article and Find Full Text PDFJ Colloid Interface Sci
December 2024
School of Chemical Engineering, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia. Electronic address:
Photocatalytic oxygen evolution reaction (OER) is pivotal for sustainable energy systems yet lacks high-performance catalysts capable of strong visible light absorption, robust charge dynamics, fast reaction kinetics, and high oxidation capability. Herein, we report the multiscale optimization of carbon nitride through the construction of porous curled carbon nitride nanosheets (CNA-B30) incorporating boron center/cyano group Lewis acid-base pairs (LABPs). The unique chemical and structural features of CNA-B30 extended the photoabsorption edges of π → π* and n → π* electronic transitions to 470 nm and 715 nm, respectively.
View Article and Find Full Text PDFFront Oncol
December 2024
Department of Chemistry, Biochemistry and Physics, South Dakota State University, Brookings, SD, United States.
Cancers utilize a simple glycan, Sialic Acid, to engage in metastatic processes via the Sialic acid (Sia) -Selectin pathway. Selectins recognize and bind to sialylated substrates, resulting in adhesion, migration, and extravasation, however, how deviations from the canonical form of Sia regulate binding to Selectin receptors (E, L, and P) on hemopoietic cells resulting in these metastatic processes, remained a gap in knowledge. De-O-acetylated Sias has been recently shown to be an integral substrate to the binding of sialic acid binding proteins.
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