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Zantioti-Chatzouda EM, Kotzabasaki V, Stratakis M. Synthesis of γ-Pyrones and N-Methyl-4-pyridones via the Au Nanoparticle-Catalyzed Cyclization of Skipped Diynones in the Presence of Water or Aqueous Methylamine. J Org Chem 2022; 87:8525-8533. [PMID: 35679874 DOI: 10.1021/acs.joc.2c00627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Supported Au nanoparticles on TiO2 catalyze the hydration/6-endo cyclization of skipped diynones to γ-pyrones in aqueous dioxane, via triple bond activation. The isomeric 3(2H)-furanones which could be formed through a competing and often prevailing 5-exo cyclization pathway using homogeneous ionic Au(I) catalysts were not seen. The reaction does not proceed via the initial 1,3-transposition of the skipped diynones to their corresponding conjugated 1,3-diynone isomers. If aqueous methylamine is added, N-methyl-4-pyridones are exclusively formed in 69-79% yields via an analogous hydroamination/Au-catalyzed 6-endo cyclization pathway.
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Affiliation(s)
| | | | - Manolis Stratakis
- Department of Chemistry, University of Crete, Voutes, 71003 Heraklion, Greece
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Pagar VV, Liu RS. Gold-catalyzed α-furanylations of quinoline N-oxides with alkenyldiazo carbonyl species. Org Biomol Chem 2015; 13:6166-9. [DOI: 10.1039/c5ob00696a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold-catalyzed α-furanylations of 8-alkylquinoline N-oxides have been achieved using various alkenyldiazo carbonyl species as nucleophiles.
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Affiliation(s)
| | - Rai-Shung Liu
- Department of Chemistry
- National Tsing-Hua University
- Hsinchu
- Republic of China
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Inamoto K, Araki Y, Kikkawa S, Yonemoto M, Tanaka Y, Kondo Y. Organocatalytic functionalization of heteroaromatic N-oxides with C-nucleophiles using in situ generated onium amide bases. Org Biomol Chem 2013; 11:4438-41. [DOI: 10.1039/c3ob40782a] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Hussain M, Banchelin TSL, Andersson H, Olsson R, Almqvist F. Enantioselective Synthesis of Substituted Piperidines by Addition of Aryl Grignard Reagents to Pyridine N-Oxides. Org Lett 2012; 15:54-7. [DOI: 10.1021/ol303085q] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Munawar Hussain
- Department of Chemistry and Umeå Centre for Microbial Research, Umeå University, SE-90187 Umeå, Sweden, ACADIA Pharmaceuticals Inc., 3911 Sorrento Valley Boulevard, San Diego, California 92121, United States, Department of Chemistry and Molecular Biology, University of Gothenburg, SE-41296 Gothenburg, Sweden, and Department of Experimental Medical Science, Lund University, SE-22100, Lund, Sweden
| | - Thomas Sainte-Luce Banchelin
- Department of Chemistry and Umeå Centre for Microbial Research, Umeå University, SE-90187 Umeå, Sweden, ACADIA Pharmaceuticals Inc., 3911 Sorrento Valley Boulevard, San Diego, California 92121, United States, Department of Chemistry and Molecular Biology, University of Gothenburg, SE-41296 Gothenburg, Sweden, and Department of Experimental Medical Science, Lund University, SE-22100, Lund, Sweden
| | - Hans Andersson
- Department of Chemistry and Umeå Centre for Microbial Research, Umeå University, SE-90187 Umeå, Sweden, ACADIA Pharmaceuticals Inc., 3911 Sorrento Valley Boulevard, San Diego, California 92121, United States, Department of Chemistry and Molecular Biology, University of Gothenburg, SE-41296 Gothenburg, Sweden, and Department of Experimental Medical Science, Lund University, SE-22100, Lund, Sweden
| | - Roger Olsson
- Department of Chemistry and Umeå Centre for Microbial Research, Umeå University, SE-90187 Umeå, Sweden, ACADIA Pharmaceuticals Inc., 3911 Sorrento Valley Boulevard, San Diego, California 92121, United States, Department of Chemistry and Molecular Biology, University of Gothenburg, SE-41296 Gothenburg, Sweden, and Department of Experimental Medical Science, Lund University, SE-22100, Lund, Sweden
| | - Fredrik Almqvist
- Department of Chemistry and Umeå Centre for Microbial Research, Umeå University, SE-90187 Umeå, Sweden, ACADIA Pharmaceuticals Inc., 3911 Sorrento Valley Boulevard, San Diego, California 92121, United States, Department of Chemistry and Molecular Biology, University of Gothenburg, SE-41296 Gothenburg, Sweden, and Department of Experimental Medical Science, Lund University, SE-22100, Lund, Sweden
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