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A new method for the preparation of piperidin-4-ones. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Sharma P, Gupta M, Gupta M, Gupta R. One-Pot Synthesis of Substituted Piperidinones and 3,4-Dihydropyrimidinones Using a Highly Active and Recyclable Supported Ionic Liquid Phase Organocatalyst. Aust J Chem 2016. [DOI: 10.1071/ch15133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
1-Ethyl-3-methylimidazolium ethyl sulfate was synthesized and its supported ionic liquid phase form was prepared and used as an organocatalyst for the synthesis of substituted piperidinones and 3,4-dihydropyrimidinones. The ionic liquid was characterized by 1H NMR, 13C NMR, and mass spectrometry. The catalyst is novel, stable, completely heterogeneous, and recyclable for several times and can be easily recovered by filtration. It was characterized with scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and energy-dispersive X-ray spectroscopy techniques. The workup procedures are very simple, and products were obtained in good-to-excellent yields with reasonable purities without the need for further chromatographic purification.
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Flick AC, Padwa A. A new route to heterocyclic compounds by the mercuric acetate oxidation of N-alkyl substituted 4-piperidones. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.07.109] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Weis R, Seebacher W. Synthesis of 2-substituted bamipine derivatives. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00082-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Diastereoselective elaboration of 2,3,4-substituted piperidines using diene iron tricarbonyl complexes. Total synthesis of (±)-dienomycin C and (±)-4-epi-dienomycin C. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)00621-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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López I, Diez A, Rubiralta M. Synthetic applications of 2-aryl-4-piperidones. XI a new synthesis of the E-azaeburnamine skeleton. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00399-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ripoche I, Gelas J, Grée D, Grée R, Troin Y. A new stereoselective synthesis of chiral optically pure 4-piperidones. Tetrahedron Lett 1995. [DOI: 10.1016/00404-0399(50)1352-i] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Diez A, Villa C, Rubiralta M. Synthetic studies on indole alkaloids. VII. Effect of the piperidine ring substitution on intramolecular KtBuO/BF3.Et2O cyclization of N-(2-hydroxyethyl)-2-[1-(phenylsulfonyl)-3-indolyl]piperidines. Tetrahedron 1993. [DOI: 10.1016/s0040-4020(01)89918-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Rubiralta M, Diez A, Miguel D, Remuson R, Gelas-mialhe Y. Synthesis of 2-(3-Indolyl)-4-MethylenepiperidinesVIAIntramolecular Cyclization of Allylsilanes. SYNTHETIC COMMUN 1992. [DOI: 10.1080/00397919208055412] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Dodd DS, Oehlschlager AC. Efficient route to the synthesis of C-2, C-3 substituted 4-piperidones. Tetrahedron Lett 1991. [DOI: 10.1016/s0040-4039(00)79755-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Diez A, Tona M, Rubiralta M. Synthetic applications of protected 2-aryl-4-piperidones. V. Synthesis of guettardine and 15-epiguettardine. Tetrahedron 1990. [DOI: 10.1016/s0040-4020(01)86774-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Rubiralta M, Diez A, Vila C. Synthetic studies on indole alkaloids. III. Synthesis of 1-ethylindolo[2,3-a]quinolizidin-2-one. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)97469-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Synthetic studies on indole alkaloids. II. Applications of phenylsulfonylindoles on intramolecular cyclizations. Tetrahedron Lett 1990. [DOI: 10.1016/s0040-4039(00)89061-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Rubiralta M, Feliz M, Jaime C, Giralt E. Determination of rotational barriers of c(sp2)-c(sp3) bonds in 2-arylpiperidines. II.1 1h-dnmr and 13c-dnmr studies of the trans-1,3-dimethyl-2-(3,4,5-trimethoxyphenyl)-4-piperidone. Tetrahedron 1986. [DOI: 10.1016/s0040-4020(01)87550-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Giralt E, Feliz M, Rubiralta M, Bosch J. Determination of rotational barriers of carboncarbon bonds in 2-arylpiperidines. J Heterocycl Chem 1984. [DOI: 10.1002/jhet.5570210317] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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