Dehydrative cyclization of epimeric 4-(L-xylo- and L-lyxo-tetritol-1-yl)-2-phenyl-2H-1,2,3-triazoles afforded the anomeric alpha and beta-L-threofuranosyl analogs. The anomeric configuration of the formed anomeric C-nucleoside analogs was determined by circular dichroism and NMR spectroscopy.
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http://dx.doi.org/10.1002/chir.20033 | DOI Listing |
Org Lett
January 2025
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China.
An unprecedented synergistic copper- and amine-catalyzed cyclization of enynone is reported. This reaction features an efficient and straightforward construction of multisubstituted tetralone through an amine-assisted regioselective oxygen atom transfer process and stereoselective intramolecular Michael addition cyclization. Under dehydrative reaction conditions, the synthesis of tetrahydronaphthylimine derivatives with ketone group tolerance is achieved, which could be challenging via traditional methods.
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January 2025
Department of Chemistry, Department of Molecular Biosciences, Chemistry of Life Processes Institute, Center for Developmental Therapeutics, Northwestern University, Evanston, Illinois 60208-3113, United States.
Dehydrative cyclization of δ-diols was achieved by using the Burgess reagent under mild conditions to furnish a novel oxabicyclo[3.2.1]octan-3-ol scaffold.
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January 2025
Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China.
Herein, visible-light-induced annulation of benzothioamides with sulfoxonium ylides to furnish thiazole derivatives is developed under transition-metal-, photocatalyst-, and oxidant-free conditions. This protocol exhibits good substrate scope, affording the desired products with satisfied yields in a mild and green manner. Detailed mechanistic studies suggest that the benzothioamide substrate plays a dual role in this reaction.
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January 2025
School of Marine Sciences, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai 519000, China. Electronic address:
ACS Catal
December 2024
Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States.
Lanthipeptides are ribosomally synthesized and post-translationally modified peptides (RiPPs) characterized by the presence of thioether cross-links called lanthionine and methyllanthionine, formed by dehydration of Ser/Thr residues and Michael-type addition of Cys side chains onto the resulting dehydroamino acids. Class II lanthipeptide synthetases are bifunctional enzymes responsible for both steps, thus generating macrocyclic natural products. ProcM is part of a group of class II lanthipeptide synthetases that are known for their remarkable substrate tolerance, having large numbers of natural substrates with highly diverse peptide sequences.
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