A general and robust strategy for the synthesis of phosphonylated spirocyclic indolines has been developed through CpFe-catalyzed electrochemical dearomaztizaion of indoles, which has been proven challenging to achieve via chemical oxidants. A range of phosphonylated 3,3-spiroindolines were obtained in moderate to good yields with excellent diastereoselectivities. The synthetic application was further illustrated by its easy scalability and the antitumor activity of the product.
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http://dx.doi.org/10.1021/acs.orglett.3c01368 | DOI Listing |
J Org Chem
January 2025
College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, People's Republic of China.
Due to its unique three-dimensional (3D) configuration and great application potential in medicinal chemistry and synthetic community, chemists have been pursuing concise and efficient methods to synthesize C3 spirocyclic indoline derivatives. In this work, a dearomatization-spirocyclization-nucleophilic addition tandem approach was developed to realize the synthesis of 2-phosphonylated C3 spirocyclic indolines with indolyl-ynones and phosphine oxides as reactants; mild conditions, broad substrate scope, and good yields are characteristics of this transformation.
View Article and Find Full Text PDFJ Org Chem
January 2025
State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, P. R. China.
An effective and economical copper-catalyzed approach for the synthesis of phosphorylated 1-isochromenes is reported. This method is the first example of focus on ketone phosphonylation to establish a C-P bond and 6-- cyclization to construct a C-O bond between aryl- and alkyl-substituted alkynylketones and H-phosphinate esters, H-phosphites, and H-phosphine oxides, resulting in chemo- and regioselective phosphorylated 1-isochromenes with moderate to excellent yields under smooth reaction conditions.
View Article and Find Full Text PDFOrg Biomol Chem
December 2024
College of Pharmacy, Dalhousie University, 5968 College St., PO Box 15000, Halifax, Nova Scotia, B3H 4R2, Canada.
β-Phosphoglucomutase (β-PGM) catalyzes the interconversion of β-D-glucose-1-phosphate and β-D-glucose-6-phosphate sequentially utilizing a transient aspartyl-phospho enzyme and a β-D-glucose-1,6-bisphosphate intermediate. Herein, we report the first synthesis of the isosteric, cleavage resistant, phosphonate analogue C-(1,6-deoxy-β-D-glucopyranosyl)dimethylphosphonate, to aid in mechanistic and structural investigations of β-PGM and its phosphate transfer process. The introduction of the 'pseudo anomeric' phosphonate was accomplished through methylenephosphonate anion addition to gluconolactone, whilst the second phosphonate was installed at C-6 of the β-D-glucopyranosyl moiety using a Horner-Wadsworth-Emmons (HWE) reaction on the C-6 aldehyde.
View Article and Find Full Text PDFMolecules
November 2024
Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, Moscow 119991, Russia.
Photoredox-catalyzed phosphonylation of bromo-substituted 1,10-phenanthrolines under visible light irradiation was studied. The reaction was shown to proceed under mild conditions with Eosin Y as a photocatalyst in DMSO under blue light irradiation. It is transition-metal-free and affords the target phosphonate-substituted 1,10-phenanthrolines in moderate yields (26-51%) in 22 to 40 h.
View Article and Find Full Text PDFOrg Lett
December 2024
Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, P. R. China.
A series of 3-phosphonyl polysubstituted pyridine were first synthesized by photocatalysis, combining a phosphonyl radical cascade reaction, Boc deprotection, and aromatization. This strategy can avoid the difficulties of activating the C3-H bond on pyridine to synthesize 3-phosphonylpyridine under mild conditions. Furthermore, by constructing different enynes, we can achieve the metal-free modular synthesis of 3-phosphonyl polysubstituted pyridine, which will be transferred into a new type of phosphine ligand.
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