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-Aryl (iso)quinolones are of increasing interest in material and medicinal chemistry, although general routes for their provision remain underexplored, especially when compared with its -alkyl counterparts. Herein, we report a modular and transition-metal-free, aryne-induced three-component coupling protocol that allows the facile synthesis of structurally diverse -aryl (iso)quinolones from readily accessible halo-(iso)quinolines in the presence of water. Preliminary results highlight the applicability of our method through scale-up synthesis, downstream derivatization, and flexible synthesis involving other types of aryne precursors.
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http://dx.doi.org/10.1021/acs.orglett.3c04385 | DOI Listing |
Org Lett
July 2025
Department of Biomedical Engineering and Diagnostic Pharmacy, China Pharmaceutical University, 211198 Nanjing, China.
The synthetic value of nitroalkanes has been widely recognized but still remains an unexplored space. Integrating nitroalkane-directed C-C bond formations with nitro group manipulations could achieve diverse and efficient syntheses of complex molecules. Herein, we report a nitro-Mannich/lactamization/nitrous acid elimination cascade process to enable the modular construction of the scaffolds of piperidone- and isoquinolone-centered polycyclic alkaloids.
View Article and Find Full Text PDFOrg Lett
February 2025
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China.
An efficient annulation approach to forming 3-thiolated isoquinolones from readily accessible -(cyanomethyl)aryl thioesters and thiophenols has been established. This metal-free annulation is achieved by taking advantage of solvent-free reactions with no precaution to exclude water or air, enabling broad substrate scope and good functionality tolerance. Furthermore, the protocol is scalable and offers facile access to valuable isoquinolones without chromatography.
View Article and Find Full Text PDFJ Org Chem
November 2024
Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
In water, Ru-catalyzed annulation of -chlorobenzamides with unsymmetrical internal alkynes bearing aryl, hydroxy, ester, and sulfonyl functionalities has been accomplished to afford isoquinolone scaffolds under external oxidant-free conditions at room temperature. Use of water as reaction medium, redox-neutral conditions, regioselectivity, and substrate scope are important practical features.
View Article and Find Full Text PDFChem Commun (Camb)
April 2024
Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China.
A palladium catalysed construction of fluoroalkyl indoles and isoquinolones through aryl/monofluoroalkylation of allenamides has been developed. Monofluoromethyl-substituted heterocycles could be accessed under mild conditions with broad functional group tolerance. In addition, indole-oxindole bisheterocyclic scaffolds bearing a fluorine atom were successfully synthesized with 3-fluoro-oxindole as the nucleophile by applying this method.
View Article and Find Full Text PDFOrg Lett
March 2024
College of Chemistry, Beijing University of Chemical Technology (BUCT), Beijing 100029, China.
-Aryl (iso)quinolones are of increasing interest in material and medicinal chemistry, although general routes for their provision remain underexplored, especially when compared with its -alkyl counterparts. Herein, we report a modular and transition-metal-free, aryne-induced three-component coupling protocol that allows the facile synthesis of structurally diverse -aryl (iso)quinolones from readily accessible halo-(iso)quinolines in the presence of water. Preliminary results highlight the applicability of our method through scale-up synthesis, downstream derivatization, and flexible synthesis involving other types of aryne precursors.
View Article and Find Full Text PDF