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Noguez MO, Marcelino V, Rodríguez H, Martín O, Martínez JO, Arroyo GA, Pérez FJ, Suárez M, Miranda R. Infrared assisted production of 3,4-dihydro-2(1H)-pyridones in solvent-free conditions. Int J Mol Sci 2011; 12:2641-9. [PMID: 21731463 PMCID: PMC3127139 DOI: 10.3390/ijms12042641] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Revised: 03/14/2011] [Accepted: 03/30/2011] [Indexed: 11/16/2022] Open
Abstract
A green approach for the synthesis of a set of ten 4-aryl substituted-5-alcoxy carbonyl-6-methyl-3,4-dihydro-2(1H)-pyridones using Meldrum’s acid has been devised, the absence of solvent and the activation with infrared irradiation in addition to a multicomponent protocol are the main reaction conditions. The transformations proceeded with moderated yields (50–75%) with a reasonable reaction rate (3 h). It is worth noting that two novel molecules of the new class of the bis-3,4-dihydropyridones were also obtained. In addition, a comparison without the use of infrared irradiation was performed.
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Affiliation(s)
- M. Olivia Noguez
- Departamento de Ciencias Químicas, Facultad de Estudios Superiores Cuautitlán-UNAM, Estado de México, 54754, Mexico; E-Mails: (M.O.N.); (J.O.M.); (G.A.A.)
| | - Vanessa Marcelino
- Departamento de Ciencias Químicas, Facultad de Estudios Superiores Cuautitlán-UNAM, Estado de México, 54754, Mexico; E-Mails: (M.O.N.); (J.O.M.); (G.A.A.)
| | - Hortensia Rodríguez
- Laboratorio de Síntesis Orgánica, Facultad de Química, Universidad de la Habana, 10400 Ciudad Habana, Cuba; E-Mails: (H.R.); (O.M.); (M.S.)
| | - Osnieski Martín
- Laboratorio de Síntesis Orgánica, Facultad de Química, Universidad de la Habana, 10400 Ciudad Habana, Cuba; E-Mails: (H.R.); (O.M.); (M.S.)
| | - Joel O. Martínez
- Departamento de Ciencias Químicas, Facultad de Estudios Superiores Cuautitlán-UNAM, Estado de México, 54754, Mexico; E-Mails: (M.O.N.); (J.O.M.); (G.A.A.)
| | - Gabriel A. Arroyo
- Departamento de Ciencias Químicas, Facultad de Estudios Superiores Cuautitlán-UNAM, Estado de México, 54754, Mexico; E-Mails: (M.O.N.); (J.O.M.); (G.A.A.)
| | - Francisco J. Pérez
- Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, D.F., 04510, Mexico; E-Mail:
| | - Margarita Suárez
- Laboratorio de Síntesis Orgánica, Facultad de Química, Universidad de la Habana, 10400 Ciudad Habana, Cuba; E-Mails: (H.R.); (O.M.); (M.S.)
| | - René Miranda
- Departamento de Ciencias Químicas, Facultad de Estudios Superiores Cuautitlán-UNAM, Estado de México, 54754, Mexico; E-Mails: (M.O.N.); (J.O.M.); (G.A.A.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +52-5556232056; Fax: +52-5556232024
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Suárez M, Martínez-Alvarez R, Martín N, Verdecia Y, Ochoa E, Alba L, Seoane C, Kayali N. Electrospray ionisation and ion-trap fragmentation of substituted 3,4-dihydro-2(1H)-pyridin-2-ones. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2002; 16:749-754. [PMID: 11921258 DOI: 10.1002/rcm.634] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A variety of 5-alkoxycarbonyl-4-aryl-6-methyl-3,4-dihydro-2(1H)-pyridones and hexahydrofuro[3,4-b]-2(1H)-pyridones have been investigated by electron impact (EI) and electrospray ionisation (ESI) techniques. Sequential product ion fragmentation (MS(n)) was performed to elucidate the degradation pathways for these compounds. Comparisons are made between positive and negative even-electron ions from ESI spectra and the molecular radical cations obtained under EI conditions. The data collected in this paper provide information on the strong impact that different substituents have on the ion fragmentation process.
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Affiliation(s)
- M Suárez
- Laboratorio de Síntesis Orgánica, Facultad de Química, Universidad de La Habana, 10400 Ciudad Habana, Cuba
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