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Martínez-Gudiño G, Pérez-Rojas NA, Trujillo-Serrato JJ, Mora-Pérez Y, Suárez-Castillo OR, Morales-Ríos MS. Mechanistic study of reversible solid-state melt isomerization of 2-oxindoles to 2-quinolinones and its occurrence in a mass spectrometer. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.08.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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2
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García-Vázquez JB, Bañuelos-Hernández AE, Trujillo-Serrato JJ, Suárez-Castillo OR, Ariza-Castolo A, Morales-Ríos MS. Structure-selectivity relationship in the cleavage of spirocyclopropyl oxindoles: An experimental and theoretical investigation. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.05.099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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3
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Bautista-Hernández CI, Trejo-Carbajal N, Zúñiga-Estrada EA, Aristeo-Dominguez A, Meléndez-Rodríguez M, Suárez-Castillo OR, Sánchez-Zavala M, Cruz-Borbolla J, Morales-Ríos MS, Joseph-Nathan P. 2-Cyano-2-indolylpropanoic acid as a chiral derivatizing agent for the absolute configuration assignment of secondary alcohols and primary amines by 1 H NMR and VCD. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.04.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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4
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Mendoza-Figueroa H, Martínez-Gudiño G, Villanueva-Luna JE, Trujillo-Serrato JJ, Morales-Ríos MS. Pharmacophore modeling and conformational analysis in the gas phase and in aqueous solution of regioisomeric melatonin analogs. A theoretical and experimental study. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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5
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García-Vázquez JB, González-Juárez DE, Morales-Ríos MS, Suárez-Castillo OR, Mora-Pérez Y. Structure elucidation of configurational isomers of nitrile-substituted spirocyclopropyloxindoles by NMR spectroscopy, molecular modeling, and X-ray crystallography. Magn Reson Chem 2015; 53:1061-1070. [PMID: 26768305 DOI: 10.1002/mrc.4293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 06/11/2015] [Accepted: 06/15/2015] [Indexed: 06/05/2023]
Affiliation(s)
- J Benjamín García-Vázquez
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
- Programa de Posgrado en Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
| | - Daphne E González-Juárez
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
| | - Martha S Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
- Programa de Posgrado en Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
| | - Oscar R Suárez-Castillo
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184, Mexico
| | - Yolanda Mora-Pérez
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
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6
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Cordero-Rivera RE, Meléndez-Rodríguez M, Suárez-Castillo OR, Bautista-Hernández CI, Trejo-Carbajal N, Cruz-Borbolla J, Castelán-Duarte LE, Morales-Ríos MS, Joseph-Nathan P. Formal synthesis of (−)-flustramine B and its absolute configuration assignment by vibrational circular dichroism exciton chirality. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Cordero-Pérez JJ, de Ita-Gutiérrez SL, Trejo-Carbajal N, Meléndez-Rodríguez M, Sánchez-Zavala M, Pérez-Hernández N, Morales-Ríos MS, Joseph-Nathan P, Suárez-Castillo OR. Complete 1H NMR assignment of 3-formylindole derivatives. Magn Reson Chem 2014; 52:789-794. [PMID: 25228011 DOI: 10.1002/mrc.4126] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 07/22/2014] [Accepted: 07/23/2014] [Indexed: 06/03/2023]
Affiliation(s)
- José J Cordero-Pérez
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184, Mexico
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8
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Alvarez-Cisneros C, Muñoz MA, Suárez-Castillo OR, Pérez-Hernández N, Cerda-García-Rojas CM, Morales-Ríos MS, Joseph-Nathan P. Stereospecific (5) JHortho,OMe couplings in methoxyindoles, methoxycoumarins, and methoxyflavones. Magn Reson Chem 2014; 52:491-499. [PMID: 25042582 DOI: 10.1002/mrc.4103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 06/06/2014] [Accepted: 06/09/2014] [Indexed: 06/03/2023]
Abstract
Long-range coupling constants (5) JHortho,OMe were measured in series of methoxyindoles, methoxycoumarins, and methoxyflavones by the modified J doubling in the frequency domain method. The COSY and NOESY spectra revealed the coupling of the -OMe group with a specific proton at the ortho position and its preferred conformation. Homonuclear (1) H-(1) H couplings were confirmed by irradiation of the -OMe signal. Density functional theory calculations of (5) JHortho,OMe using the modified aug-cc-pVTZ basis set evidenced that the Fermi contact term shows good agreement with the experimental J values. Accurate chemical shift and coupling constant values followed after iterative quantum mechanical spectral analysis using the PERCH software.
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Affiliation(s)
- Celina Alvarez-Cisneros
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000, Mexico
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9
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Morales-Ríos MS, Martínez-Richa A, Hernández-Gallegos Z, Hernández-Barragán A, Vera-Graziano R, Joseph-Nathan P. Studies of Dihydropyridines by X-Ray Diffraction and Solid State 13C NMR. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-2007-0410] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Fourteen dimethyl 4-aryl-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylates (DHPs) were evaluated by means of single crystal X-ray diffraction in order to investigate the effects of the structure in the crystals on the solid state 13C NMR chemical shifts. These include the analysis of three DHPs containing two molecules per asymmetric unit. The chiral rotamer unit generated by the s-cis/s-trans orientation of the carbonyl groups, as well as by rotation of the 4-phenyl ring out of the bisecting plane containing the N1, C4, C7 atoms, resulted in a significant magnetic non-equivalence for the C2-CH3/C6-CH3 and the COOCH3 pairs of signals. The solid state 13C NMR data reveal that the substitution pattern of the phenyl ring has a marked effect on the extent to which the signals of the carbonyl carbon atoms and those of C-2/C-6 peaks are split.
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Affiliation(s)
- Martha S. Morales-Ríos
- Departamento de Química and Sección Externa de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México D. F., 07000 México
| | - Antonio Martínez-Richa
- Facultad de Química, Universidad de Guanajuato, Noria alta s/n, Guanajuato, Gto 36050, México
| | - Zurisaddai Hernández-Gallegos
- Departamento de Química and Sección Externa de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, M´exico D. F., 07000 México
| | - Angelina Hernández-Barragán
- Departamento de Química and Sección Externa de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México D. F., 07000 México
| | - Ricardo Vera-Graziano
- Instituto de Investigaciones en Materiales, UNAM, Apartado 70-360, Coyoacán, México D. F., 04510 México
| | - Pedro Joseph-Nathan
- Departamento de Química and Sección Externa de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México D. F., 07000 México
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10
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Pérez-Hernández N, Álvarez-Cisneros C, Cerda-García-Rojas CM, Morales-Ríos MS, Joseph-Nathan P. Deuterium-induced isotope effects on the 13C chemical shifts of α-D-glucose pentaacetate. Magn Reson Chem 2013; 51:136-142. [PMID: 23315885 DOI: 10.1002/mrc.3918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 12/06/2012] [Accepted: 12/08/2012] [Indexed: 06/01/2023]
Abstract
1,2,3,4,6-Penta-O-acetyl-α-D-glucopyranose and the corresponding [1-(2)H], [2-(2)H], [3-(2)H], [4-(2)H], [5-(2)H], and [6,6-(2)H(2)]-labeled compounds were prepared for measuring deuterium/hydrogen-induced effects on (13)C chemical shift (n)Δ (DHIECS) values. A conformational analysis of the nondeuterated compound was achieved using density functional theory (DFT) molecular models that allowed calculation of several structural properties as well as Boltzmann-averaged (13)C NMR chemical shifts by using the gauge-including atomic orbital method. It was found that the DFT-calculated C-H bond lengths correlate with (1)Δ DHIECS.
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Affiliation(s)
- Nury Pérez-Hernández
- Programa Institucional de Biomedicina Molecular, Escuela Nacional de Medicina y Homeopatía, Instituto Politécnico Nacional, México, D. F. 07320, Mexico
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11
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Morales-Ríos MS, Rivera-Becerril E, López-Camacho PY, Pérez-Rojas NA, Suárez-Castillo OR. Preparation of O-methyl substituted 2-oxofuro- and 2-oxopyrrolidinoindolines by reductive lactonization of oxindol-3-ylacetic acids. Nat Prod Commun 2012; 7:1445-1451. [PMID: 23285804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
Abstract
A practical procedure for the preparation of O-methyl substituted 3a,8-dialkyl-2-oxofuroindolines is described. Reductive lactonization of the corresponding oxindol-3-ylacetic acids provides a route for the formation of this class of compounds. Further transformation of 2-oxofuroindolines into 2-oxopyrrolidinoindolines, and then to pyrrolidinoindolines demonstrates their versatility as key intermediates in natural products synthesis. The results of single-crystal X-ray crystallographic analyses are given for five of the studied compounds.
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Affiliation(s)
- Martha S Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 Mexico.
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12
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Morales-Ríos MS, Rivera-Becerril E, López-Camacho PY, Pérez-Rojas NA, Suárez-Castillo OR. Preparation of O-Methyl Substituted 2-Oxofuro- and 2-Oxopyrrolidinoindolines by Reductive Lactonization of Oxindol-3-Ylacetic Acids. Nat Prod Commun 2012. [DOI: 10.1177/1934578x1200701110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A practical procedure for the preparation of O-methyl substituted 3a,8-dialkyl-2-oxofuroindolines is described. Reductive lactonization of the corresponding oxindol-3-ylacetic acids provides a route for the formation of this class of compounds. Further transformation of 2-oxofuroindolines into 2-oxopyrrolidinoindolines, and then to pyrrolidinoindolines demonstrates their versatility as key intermediates in natural products synthesis. The results of single-crystal X-ray crystallographic analyses are given for five of the studied compounds.
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Affiliation(s)
- Martha S. Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 Mexico
| | - Ernesto Rivera-Becerril
- Departamento de Ciencias Naturales, Universidad Autónoma Metropolitana, Unidad Cuajimalpa, Avenida Pedro Antonio de los Santos 84, México D.F., 11850 Mexico
| | - Perla Y. López-Camacho
- Departamento de Ciencias Naturales, Universidad Autónoma Metropolitana, Unidad Cuajimalpa, Avenida Pedro Antonio de los Santos 84, México D.F., 11850 Mexico
| | | | - Oscar R. Suárez-Castillo
- Area Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184 Mexico
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13
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R. Suárez-Castillo O, I. Bautista-Hernández C, Sánchez-Zavala M, Meléndez-Rodríguez M, Sierra-Zenteno A, S. Morales-Ríos M, Joseph-Nathan P. Microwave-Assisted Synthesis of 3,1-Benzoxazin-2-ones from 3-Hydroxyoxindoles. HETEROCYCLES 2012. [DOI: 10.3987/com-12-12472] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Suárez-Castillo OR, Meléndez-Rodríguez M, Castelán-Duarte LE, Zúñiga-Estrada EA, Cruz-Borbolla J, Morales-Ríos MS, Joseph-Nathan P. Absolute configuration assignment of 3-oxindolylacetyl-4-phenyloxazolidinone derivatives. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.11.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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15
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Rivera H, Morales-Ríos MS, Bautista W, Shibayama M, Tsutsumi V, Muriel P, Pérez-Álvarez V. A novel fluorinated stilbene exerts hepatoprotective properties in CCl4-induced acute liver damage. Can J Physiol Pharmacol 2011; 89:759-66. [DOI: 10.1139/y11-074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
There has been a recently increase in the development of novel stilbene-based compounds with in vitro anti-inflamatory properties. For this study, we synthesized and evaluated the anti-inflammatory properties of 2 fluorinated stilbenes on carbon tetrachloride (CCl4)-induced acute liver damage. To achieve this, CCl4 (4 g·kg–1, per os) was administered to male Wistar rats, followed by either 2-fluoro-4′-methoxystilbene (FME) or 2,3-difluoro-4′-methoxystilbene (DFME) (10 mg·kg–1, per os). We found that although both of the latter compounds prevented cholestatic damage (γ-glutamyl transpeptidase activity), only DFME showed partial but consistent results in the prevention of necrosis, as assessed by both alanine aminotransferase activity and histological analysis. Since inflammatory responses are mediated by cytokines, mainly tumour necrosis factor α (TNF-α), we used the Western blot technique to determine the action of FME and DFME on the expression level of this cytokine. The observed increase in the level of TNF-α caused by CCl4 administration was only prevented by treatment with DFME, in agreement with our biochemical findings. This result was confirmed by measuring interleukin-6 (IL-6) levels, since the expression of this protein depends on the level of TNF-α. In this case, DFME completely blocked the CCl4-induced increase of IL-6. Our results suggest that DFME possesses greater anti-inflammatory properties in vivo than FME. DFME constitutes a possible therapeutic agent for liver disease and could serve as a template for structure optimization.
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Affiliation(s)
- Horacio Rivera
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F. 07360 Mexico
| | - Martha S. Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F. 07360 Mexico
| | - Wendy Bautista
- Department of Physiology, University of Manitoba, Winnipeg, MB R3E OJ9, Canada
| | - Mineko Shibayama
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F. 07360, Mexico
| | - Víctor Tsutsumi
- Departamento de Infectómica y Patogénesis Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F. 07360, Mexico
| | - Pablo Muriel
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F. 07360 Mexico
| | - Víctor Pérez-Álvarez
- Departamento de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F. 07360 Mexico
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16
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Morales-Ríos MS, López-Camacho PY, Jacobo-Cabral CO, Pérez-Rojas NA, Trujillo-Serrato JJ, Burgueño-Tapia E, Suárez-Castillo OR, Joseph-Nathan P. Unimolecular rearrangements of ketene-O,O-acetals and fragmentations occurring in the gas phase. J Mass Spectrom 2011; 46:489-495. [PMID: 21500318 DOI: 10.1002/jms.1915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Gas phase skeletal rearrangements of regioisomeric 3-cyano-2-methoxy-3a-alkylfuro[2,3-b]- and [3,2-b]indoles were evidenced by product ions [M-32](+•), consistent with loss of methanol, on electron ionization in their mass spectra. The rearranged products occurring in gas phase were demonstrated to have elemental composition and fragmentation properties identical to those of authentic samples of 2-indolyl cyanomalonates. Isotopic labeling experiments support the formation mechanism of the [M-32](+•) ion. Additional thermal gas-phase reaction products were characterized by comparison with an authentic sample.
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Affiliation(s)
- Martha S Morales-Ríos
- Departamento de Química Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 Mexico.
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17
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Suárez-Castillo OR, Meléndez-Rodríguez M, Beiza-Granados L, Cano-Escudero IC, Morales-Ríos MS, Joseph-Nathan P. C-6 Regioselective Bromination of Methyl Indolyl-3-acetate. Nat Prod Commun 2011. [DOI: 10.1177/1934578x1100600405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An efficient route to natural occurring methyl 6-bromoindolyl-3-acetate 1c from methyl indolyl-3-acetate 3 was achieved in 3 steps and 68% overall yield. Thus, in order to regioselectively brominate 3 at the C6-position, introduction of electron withdrawing substituents at N1 and C8 was affected to give intermediate 4 in 82% yield. Bromination of 4 with 8 equiv of bromine in CCl4 and washings with aqueous Na2SO3 gave 5 in 86% yield, which was N- and C-decarbomethoxylated by treatment with NaCN in DMSO, affording 1c in 97% yield. The regioselectivity of bromination was evidenced by NMR spectroscopy and X-ray diffraction analysis.
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Affiliation(s)
- Oscar R. Suárez-Castillo
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184 México
| | - Myriam Meléndez-Rodríguez
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184 México
| | - Lidia Beiza-Granados
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184 México
| | - Indira C. Cano-Escudero
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184 México
| | - Martha S. Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
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18
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Morales-Ríos MS, Rivera-Becerril E, González-Juárez DE, García-Vázquez JB, Trujillo-Serrato JJ, Hernández-Barragán A, Joseph-Nathan P. Synthesis of Pyrrolidinoindolines from 2-(2-Oxo-3-indolyl)acetates: Scope and Limitations. Nat Prod Commun 2011. [DOI: 10.1177/1934578x1100600406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A series of 1,3a,8-alkylpyrrolidinoindolines have been synthesized. The scope and limitations of the alkylation of starting methyl oxindol-3-acetates are explored employing electron-rich and electron-poor alkylating agents. Hydrolysis and reductive lactonization of the resulting carboxylic γ-oxindolic acid derivatives proceeds with good yields to afford 2-oxofuroindolines providing ready access to the pyrrolidinoindoline derivatives.
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Affiliation(s)
- Martha S. Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
- Programa de Posgrado en Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Ernesto Rivera-Becerril
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
- Programa de Posgrado en Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Daphne E. González-Juárez
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
- Programa de Posgrado en Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Juan Benjamín García-Vázquez
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
- Programa de Posgrado en Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Joel J. Trujillo-Serrato
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Angelina Hernández-Barragán
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
- Programa de Posgrado en Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
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Suárez-Castillo OR, Meléndez-Rodríguez M, Beiza-Granados L, Cano-Escudero IC, Morales-Ríos MS, Joseph-Nathan P. C-6 regioselective bromination of methyl indolyl-3-acetate. Nat Prod Commun 2011; 6:451-456. [PMID: 21560757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
An efficient route to natural occurring methyl 6-bromoindolyl-3-acetate 1c from methyl indolyl-3-acetate 3 was achieved in 3 steps and 68% overall yield. Thus, in order to regioselectively brominate 3 at the C6-position, introduction of electron withdrawing substituents at N1 and C8 was affected to give intermediate 4 in 82% yield. Bromination of 4 with 8 equiv of bromine in CCl4 and washings with aqueous Na2SO3 gave 5 in 86% yield, which was N- and C-decarbomethoxylated by treatment with NaCN in DMSO, affording 1c in 97% yield. The regioselectivity of bromination was evidenced by NMR spectroscopy and X- ray diffraction analysis.
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Affiliation(s)
- Oscar R Suárez-Castillo
- Area Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184 México.
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20
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Morales-Ríos MS, Rivera-Becerril E, González-Juárez DE, García-Vázquez JB, Trujillo-Serrato JJ, Hernández-Barragán A, Joseph-Nathan P. Synthesis of pyrrolidinoindolines from 2-(2-oxo-3-indolyl)acetates: scope and limitations. Nat Prod Commun 2011; 6:457-464. [PMID: 21560758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
A series of 1,3a,8-alkylpyrrolidinoindolines have been synthesized. The scope and limitations of the alkylation of starting methyl oxindol-3-acetates are explored employing electron-rich and electron-poor alkylating agents. Hydrolysis and reductive lactonization of the resulting carboxylic gamma-oxindolic acid derivatives proceeds with good yields to afford 2-oxofuroindolines providing ready access to the pyrrolidinoindoline derivatives.
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Affiliation(s)
- Martha S Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México.
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21
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López-Camacho PY, Joseph-Nathan P, Gordillo-Román B, Suárez-Castillo OR, Morales-Ríos MS. Cascade [1,3]-sigmatropic rearrangements of ketene O,O-acetals: kinetic and DFT level mechanistic studies. J Org Chem 2010; 75:1898-910. [PMID: 20180516 DOI: 10.1021/jo902520z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The regioisomeric alpha-cyano ketene-O,O-dialkyl acetals 2a-e and 4a-e, sequential intermediates in the diazomethane induced conversion of indole alpha-cyano-gamma-lactones 1a-e to 2-indolyl cyanomalonates 5a-e, were isolated and characterized. Formation of the steady-state intermediate cycloprop[b]indoles 3a-e was evidenced by means of NMR and confirmed by the X-ray structure of 3c, demonstrating that the formation of 5a-e from 2a-e proceeds through two consecutive and one parallel unimolecular steps, with intermediates 3a-e formed in reversible processes. Evidence that the reversible reactions proceed via [1,3]-rearrangements is presented. The steady-state kinetic approach applied to intermediate 3 allowed a minimal two consecutive step 2 --> 4--> 5 kinetic model, in which the steric bulkiness of the alkyl substituent affects strongly the associated rate constants, k(1) and k(2), inverting the rate-determining step. The solvation effects enhanced the feasibility of these skeletal rearrangements as they stabilized the transition states to a great extent. The experimental determined thermodynamic parameters and DFT calculations suggest that these cascade rearrangements occur through [1,3]-sigmatropic mechanisms, in which asynchronous bond reorganization processes via four membered pseudopericyclic transition states are highly favorable.
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Affiliation(s)
- Perla Y López-Camacho
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, DF, 07000 Mexico
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22
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R. Suárez-Castillo O, Meléndez-Rodríguez M, C. Cano-Escudero I, Luz De Ita-Gutiérrez S, Sánchez-Zavala M, S. Morales-Ríos M, Joseph-Nathan P. Regioselective Synthesis of 3-Indolyl(alkoxy)acetates. HETEROCYCLES 2010. [DOI: 10.3987/com-10-11904] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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23
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Suárez-Castillo OR, Meléndez-Rodríguez M, Contreras-Martínez YMA, Álvarez-Hernández A, Morales-Ríos MS, Joseph-Nathan P. DMD Mediated Formal Synthesis of (±)-Coerulescine. Nat Prod Commun 2009. [DOI: 10.1177/1934578x0900400612] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A highly efficient method for the formal synthesis of the natural product (±)-coerulescine 1 from tetrahydro-β-carboline 3, mediated by dimethyldioxirane (DMD), is described. Compound 15, the N9-demethylated precursor of 1, was prepared from 3 in 4 steps with an overall yield of 95%. The effect of electron withdrawing groups at the N2, N9 atoms of 3 was explored for the oxidative rearrangement step.
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Affiliation(s)
- Oscar R. Suárez-Castillo
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184 México
| | - Myriam Meléndez-Rodríguez
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184 México
| | | | - Alejandro Álvarez-Hernández
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184 México
| | - Martha S. Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
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Suárez-Castillo OR, Meléndez-Rodríguez M, Contreras-Martínez YMA, Alvarez-Hernández A, Morales-Ríos MS, Joseph-Nathan P. DMD mediated formal synthesis of (+/-)-coerulescine. Nat Prod Commun 2009; 4:797-802. [PMID: 19634325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
A highly efficient method for the formal synthesis of the natural product (+/-)-coerulescine 1 from tetrahydro-beta-carboline 3, mediated by dimethyldioxirane (DMD), is described. Compound 15, the N9-demethylated precursor of 1, was prepared from 3 in 4 steps with an overall yield of 95%. The effect of electron withdrawing groups at the N2,N9 atoms of 3 was explored for the oxidative rearrangement step.
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Affiliation(s)
- Oscar R Suárez-Castillo
- Area Académica de Química, Universidad Autónoma del Estado de Hidalgo, Mineral de la Reforma, Hidalgo, 42184 México.
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Pérez-Hernández N, Alvarez-Cisneros C, Cerda-García-Rojas CM, Morales-Ríos MS, Joseph-Nathan P. Benzylic coupling constants in toluene derivatives by J doubling in the frequency domain and DFT calculations. Magn Reson Chem 2009; 47:437-442. [PMID: 19229891 DOI: 10.1002/mrc.2411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The recently modified J doubling in the frequency domain method (MJDFDM) allowed the determination of (4, 5, 6)J(H, CH(3) ) in toluene, a series of 4-mono- and 3,5-disubstituted toluene derivatives, as well as in 4-picoline. The methyl and aromatic signals were subjected to successive deconvolution processes, which at the end led to singlet signals and afforded the corresponding coupling constant values with a high degree of accuracy. Density functional theory calculation of benzylic coupling constants by addition of the Fermi contact, the spin-dipole, the diamagnetic spin-orbit, and the paramagnetic spin-orbit terms revealed good agreement between predicted and measured values when the B3LYP/aug-cc-pVTZ level of theory was used. Evaluation of the substituent effect over the coupling constant was made for all studied compounds and some limitations of the methodology were evidenced.
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Affiliation(s)
- Nury Pérez-Hernández
- Escuela de Medicina, Universidad Autónoma del Estado de Hidalgo, Apartado 1-622, Pachuca, Hidalgo 42001, México
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26
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R. Suárez-Castillo O, L. Morales-García A, C. Cano-Escudero I, M. A. Contreras-Martínez Y, Meléndez-Rodríguez M, S. Morales-Ríos M, Joseph-Nathan P. Synthesis of Indolylindolines Mediated by tert-BuNH2. HETEROCYCLES 2009. [DOI: 10.3987/com-08-11627] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Rivera-Becerril E, Joseph-Nathan P, Pérez-Álvarez VM, Morales-Ríos MS. Synthesis and Biological Evaluation of (−)- and (+)-Debromoflustramine B and Its Analogues as Selective Butyrylcholinesterase Inhibitors. J Med Chem 2008; 51:5271-84. [DOI: 10.1021/jm800277g] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ernesto Rivera-Becerril
- Departamento de Química y Sección Externa de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Pedro Joseph-Nathan
- Departamento de Química y Sección Externa de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Víctor M. Pérez-Álvarez
- Departamento de Química y Sección Externa de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
| | - Martha S. Morales-Ríos
- Departamento de Química y Sección Externa de Farmacología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, D. F., 07000 México
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Abstract
Brominated natural indoles are frequently reported metabolites of marine seaweeds. The bryozoan Flustra foliacea has been a rich source of brominated indole alkaloids bearing prenyl or isoprenyl substituents at various positions. Because interest in the chemistry of these marine alkaloids is steadily growing and shows unique promise in the discovery of new important medicinal drugs, the methods which have been employed towards their total synthesis are reviewed in detail.
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Affiliation(s)
- Martha S. Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, Mexico, D. F., 07000 Mexico
| | - Oscar R. Suárez-Castillo
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Hidalgo, Apartado 1-328, Pachuca, Hidalgo, 42001 Mexico
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Fernández-Martínez E, Bobadilla RA, Morales-Ríos MS, Muriel P, Pérez-Alvarez VM. Trans-3-phenyl-2-propenoic acid (cinnamic acid) derivatives: structure-activity relationship as hepatoprotective agents. Med Chem 2007; 3:475-9. [PMID: 17897074 DOI: 10.2174/157340607781745410] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Among various phenolic compounds, caffeic acid (3,4-dihydroxycinnamic acid) exhibited pharmacological antioxidant, anticancer and antimutagenic activities. The antioxidant properties of phenolic compounds depend on their chemical structure, however, the role of the ethylenic side chain in the radical scavenging activity remains controversial. Thus, the aim of this study consisted to test cinnamic acid and 15 cinnamic acid derivatives in the well known CCl(4)-induced acute liver damage model, which is dependent on oxidative stress mechanisms. Cinnamic acid and 15 cinnamic acid derivatives (50 mg/kg, p.o.) were administered to male Wistar rats intoxicated with CCl(4) (4 g/kg, p.o.). The activities of gamma-glutamyl transpeptidase, alkaline phosphatase and alanine aminotransferase were measured in serum. The lipid peroxidation products were determined in liver. Compounds with a methoxy group at position 3 or 4, or a 3,4-methylenedioxy moiety were the most active ones. Also, we observed that the monosubstituted 3 or 4 hydroxy, or the bulky 3,4 dibenzyloxy substituted compounds showed lower activity. The poorest activity was displayed by disubstituted 3,4-dihydroxy, dimethoxy or diacetyl cinnamic acid derivatives, the ester derived from cinnamic acid with an 8 carbon chain and N-dimethyl substituted compound. Thus, the methoxy substituted group at positions 3 or 4 or the 3,4-methylenedioxy moiety in the caffeic acid derivatives; seem to be the main features required for the hepatoprotection in this model.
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Affiliation(s)
- Eduardo Fernández-Martínez
- Centro de Investigación en Biología de la Reproducción, Universidad Autónoma del Estado de Hidalgo, Mexico
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Reyes-Trejo B, Morales-Ríos MS, Joseph-Nathan P. Wagner-Meerwein rearrangement of a [3.3.3]- to a [4.3.3]propellane: deuterium tracer and conformational analysis. Magn Reson Chem 2007; 45:346-50. [PMID: 17351977 DOI: 10.1002/mrc.1978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Formation of (-)-[4.3.3]propellane 4 from (-)-14-hydroxymodhephene (2) proceeds through a Wagner-Meerwein rearrangement via C3--C4 bond-shift to give a stable intermediate, dimethylcyclohexadienyl cation A, which undergoes deprotonation. Herein, this mechanism was investigated by using a deuterium labeled substrate at the C-14 methylene group of (-)-2, which was incorporated into the C-4 position of (-)-[4.3.3]propellane 4. The stereostructure of (-)-4 was investigated by applying a combination of NMR experimental and theoretical approaches.
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Affiliation(s)
- Benito Reyes-Trejo
- Laboratorio de Productos Naturales, Area de Química, Universidad Autónoma Chapingo, Apartado 74, Oficina de Correos Chapingo, Texcoco, México, 56230, México
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R. Suárez-Castillo O, Aquino-Torres E, Joseph-Nathan P, Sánchez-Zavala M, Meléndez-Rodríguez M, S. Morales-Ríos M. First Total Synthesis of (±)-Flustraminol B. HETEROCYCLES 2007. [DOI: 10.3987/com-07-11048] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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33
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Suárez-Castillo OR, Beiza-Granados L, Meléndez-Rodríguez M, Alvarez-Hernández A, Morales-Ríos MS, Joseph-Nathan P. Synthesis of bromoindole alkaloids from Laurencia brongniartii. J Nat Prod 2006; 69:1596-600. [PMID: 17125228 DOI: 10.1021/np060406a] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
A regioselective synthesis of N-carbomethoxy-2,3,5-tribromoindole (6) via a sequential one-pot bromination-aromatization-bromination of N-carbomethoxyindoline (2) is described. The process for the transformation of 2 into 6 permitted the isolation of stable reaction intermediates N-carbomethoxy-5-bromoindoline (3), N-carbomethoxy-5-bromoindole (4), and N-carbomethoxy-3,5-dibromoindole (5). Compound 6 was used to complete the total synthesis of the natural products 1b and 1c. In addition, bromination of N-carbomethoxyindole (11) afforded N-carbomethoxy-2,3,6-tribromoindole (13), from which the natural product 1a was synthesized.
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Affiliation(s)
- Oscar R Suárez-Castillo
- Centro de Investigaciones Químicas, Universidad Autónoma del Estado de Hidalgo, Apartado 1-622, Pachuca, Hidalgo, 42001 México.
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Abstract
The preparation and further rearrangement of (-)-modhephene (1) to a (-)-triquinane 5 has been assessed through acid catalysis. The rearrangement involved protonation, 1,2 sigma-bond and methyl shifts, and deprotonation. Monitored experiments by 1H NMR spectroscopy suggested the intermediate (-)-isocomene (3), which was further evidenced when a sample of natural (-)-3 undergoes acid-catalyzed conversion to the (-)-triquinane 5. In addition, deuterated (-)-modhephene (1-d) labeled stereospecifically at the 14beta geminal methyl group at C4 was synthesized, through the corresponding chiral deuterated primary alcohol, in 5 steps, starting from natural (-)-14-hydroxymodhephene (8), and rearranged under acid catalysis to elucidate the stereochemical factors that control the methyl shift at this position. The final deuterium-labeled (-)-triquinane, 5-d, obtained from [14-(2)H1]-1-d was established to have deuterium in the methyl group at C5 by 13C NMR spectroscopy. This stereoselective methyl migration is in accordance with the molecular orbital demand formulated by the quantum chemical calculations performed in the present study.
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Affiliation(s)
- Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, DF, 07000 México
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Pérez-Hernández N, Morales-Ríos MS, Cerda-García-Rojas CM, Joseph-Nathan P. Conformational evaluation and detailed 1H and 13C NMR assignments of flavoxate, a urinary tract antispasmodic agent. J Pharm Biomed Anal 2006; 41:603-9. [PMID: 16426792 DOI: 10.1016/j.jpba.2005.11.042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2005] [Revised: 11/21/2005] [Accepted: 11/22/2005] [Indexed: 11/19/2022]
Abstract
1H and 13C NMR chemical shift assignments for the urinary tract antispasmodic flavoxate (1) and flavoxate hydrochloride (2) were obtained from one- and two-dimensional measurements. A Monte Carlo random search using molecular mechanics, followed by geometry optimization of each minimum energy structure employing DFT calculations at the B3LYP/6-31G* level, and a Boltzmann analysis of the total energies, provided accurate molecular models which describe the conformational behavior of flavoxate (1). The electron density surfaces for the global minimum and the second minimum conformers 1a and 1b of this L-type Ca2+ channel inhibitor were calculated. The presence of both conformers in solution was demonstrated in full agreement with 2D NOESY data and NOE difference spectroscopy.
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Affiliation(s)
- Nury Pérez-Hernández
- Centro de Investigación en Biología de la Reproducción, Campus Sahagún, Universidad Autónoma del Estado de Hidalgo, Apartado 1-622, Pachuca, Hidalgo 42001, Mexico
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36
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S. Morales-Ríos M, Rivera-Becerril E, Joseph-Nathan P, Pérez-Hernández N. Structural Characterization of Isomeric Methyl 2-(2-Oxo-3-indolyl)acetate and Methyl 1-(2-Oxo-4-quinolyl)formate. HETEROCYCLES 2006. [DOI: 10.3987/com-06-10759] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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Suárez-Castillo OR, Contreras-Martínez YM, Beiza-Granados L, Meléndez-Rodríguez M, Villagómez-Ibarra JR, Torres-Valencia JM, Morales-Ríos MS, Joseph-Nathan P. Conformational studies of N-carbomethoxy-2-alkoxyindolenines by dynamic NMR, crystallography, and molecular mechanics. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.07.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Burgueño-Tapia E, Mora-Pérez Y, Morales-Ríos MS, Joseph-Nathan P. 1H, 13C and 15N NMR assignments of phenazopyridine derivatives. Magn Reson Chem 2005; 43:256-260. [PMID: 15625718 DOI: 10.1002/mrc.1542] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Phenazopyridine hydrochloride (1), a drug in clinical use for many decades, and some derivatives were studied by one- and two-dimensional (1)H, (13)C and (15)N NMR methodology. The assignments, combined with DFT calculations, reveal that the preferred protonation site of the drug is the pyridine ring nitrogen atom. The chemoselective acetylation of phenazopyridine (2) and its influence on the polarization of the azo nitrogen atoms were evidenced by the (15)N NMR spectra. Molecular calculations of the phenazopyridines 2-4 show that the pyridine and phenyl groups are oriented in an antiperiplanar conformation with intramolecular hydrogen bonding between the N-b atom and the C-2 amino group preserving the E-azo stereochemistry.
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Affiliation(s)
- Eleuterio Burgueño-Tapia
- Departamento de Química, Unidad Profesional Interdisciplinaria de Biotecnología, Instituto Politécnico Nacional, Av. Acueducto s/n, La Laguna Ticomán, México D.F., 07340 Mexico
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Morales-Ríos MS, Velasco L, Pérez-Rojas NA, Joseph-Nathan P. Electron ionization mass spectra of indolenines obtained using sector and ion trap mass spectrometers. Rapid Commun Mass Spectrom 2005; 19:1296-1304. [PMID: 15852451 DOI: 10.1002/rcm.1930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The electron impact (EI)-induced fragmentations of 18 indolenines were studied using both double-focusing and ion trap mass spectrometers. The compounds used in this study were synthesized to provide correlations of characteristic fragment ions with specific structural differences. In 2-hydroxyindolenines the hydroxy group was involved in a major fragmentation process by interacting with the ester side chain to generate an alpha,beta-unsaturated gamma-lactone structure, with concomitant loss of the corresponding alcohol. In contrast, loss of an alkyl radical, derived solely from the 2-alkoxy group, is a major primary decomposition process for 2-alkoxyindolenines. EI-MS analyses using sector and ion trap spectrometers resulted in similar fragmentation patterns.
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Affiliation(s)
- Martha S Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México.
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Morales-Ríos MS, Santos-Sánchez NF, Pérez-Rojas NA, Joseph-Nathan P. Conformational insights into furo- and thieno[2,3-b]indolines derived from coupling constants and molecular modeling. Magn Reson Chem 2004; 42:973-976. [PMID: 15386545 DOI: 10.1002/mrc.1479] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The extent to which conformational preferences of fused heterocyclic five-membered rings change with the nature of the heteroatom (O and S) was investigated in furo- (1, 2) and thieno[2,3-b]indolines (3, 4) by the combined use of 1H NMR spectroscopy and density functional theory (DFT) calculations. In contrast to the behavior observed for pyrroloindolines, the furo- and thienoindolines exist in solution in only one conformer, with structures in the 2E-2T3 (1,2) and 2T3-E (3,4) North/West region of the pseudorotational wheel, and with pseudorotation phase angles (P) of 315.8, 311.6, 337.2 and 331.6 degrees, respectively.
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Affiliation(s)
- Martha S Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México D.F., 07000 Mexico.
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Fernández-Martínez E, Morales-Ríos MS, Pérez-Alvarez V, Muriel P. Immunomodulatory effects of thalidomide analogs on LPS-induced plasma and hepatic cytokines in the rat. Biochem Pharmacol 2004; 68:1321-9. [PMID: 15345321 DOI: 10.1016/j.bcp.2004.06.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2004] [Accepted: 06/17/2004] [Indexed: 11/18/2022]
Abstract
Thalidomide has shown to inhibit, selectively and mainly the cytokine tumor necrosis factor-alpha (TNF-alpha), thus, thalidomide has inhibitory consequences on other cytokines; this is ascribed as an immunomodulatory effect. Novel thalidomide analogs are reported with immunomodulatory activity. The aim of this work was to synthesize some of these analogs and to assess them as immunomodulatory agents in an acute model of LPS-induced septic challenge in rat. Animal groups received orally twice a day vehicle carboxymethylcellulose (0.9%), or thalidomide in suspension (100mg/kg), or analogs in an equimolar dose. Two hours after last dose, rats were injected with saline (NaCl, 0.9%, i.p.) or LPS (5mg/kg, i.p.). Groups were sacrificed 2h after injection and samples of blood and liver were obtained. TNF-alpha, interleukin-6, -1beta, and -10 (IL-6, IL-1beta, IL-10) were quantified by enzyme linked immunosorbent assay (ELISA) and studied in plasma and liver. After 2h of LPS-induction, different patterns of measured cytokines were observed with thalidomide analogs administration evidencing their immunomodulatory effects. Interestingly, some analogs decreased significantly plasma and hepatic levels of LPS-induced proinflammatory TNF-alpha and others increased plasma concentration of anti-inflammatory IL-10. Thalidomide analogs also showed slight effects on the remaining proinflammatory cytokines. Differences among immunomodulatory effects of analogs can be related to potency, mechanism of action, and half lives. Thalidomide analogs could be used as a pharmacological tool and in therapeutics in the future.
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S. Morales-Ríos M, Joseph-Nathan P, F. Santos-Sánchez N, Mora-Pérez Y. Synthesis of Isotope Labeled Me(3a)-13C-Physostigmine and Debromoflustramine B. HETEROCYCLES 2004. [DOI: 10.3987/com-04-10041] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Morales-Ríos MS, Santos-Sánchez NF, Suárez-Castillo OR, Joseph-Nathan P. Aromatic bromination versus oxidation of indolylmalonates by bromine. J Org Chem 2003; 68:305-11. [PMID: 12530853 DOI: 10.1021/jo020543m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reactions of 5-substituted indolylmalonates (2a-e), carrying an electron-withdrawing group at the N(1) position, with bromine in CCl(4) or AcOH are reported. These substrates undergo oxidation in competition with the well-known aromatic bromination. Under the two sets of conditions, with parent indolylmalonate (2a), chemospecific oxidation is observed, whereas with 5-hydroxyindolylmalonate (2c), bromination at the 4- and 6-position is the dominating reaction. Investigation of the products composition of several 5-substituted indolylmalonates revealed the following trend: with a 5-substituted electron-withdrawing group like fluorine, the indolylmalonate undergoes oxidation rather than bromination. In contrast, with a 5-substituted electron-donating group, like a hydroxyl group, the ring bromination occurs preferentially over the oxidation. When the 5-substituent is an alkoxyl group, a significant amount of brominated-oxidized products is obtained. Monitoring the oxidation reaction by mass spectrometry allowed the characterization of the 2-bromoindolylidenemalonate intermediate. A bromonium ion is considered as possible pathway in the formation of this intermediate. The conformation of unsymmetrical methoxyl and benzyloxyl substituents was determined from (1)H NMR spectra, single-crystal X-ray diffraction and ab initio calculations.
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Affiliation(s)
- Martha S Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México D. F. 07000, Mexico
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Pérez-Alvarez V, Fernández-Martinez E, Morales-Ríos MS, Bobadilla RA, Muriel P. Synthesis and hepatoprotective activity of 3,4 diacetyl; 3,4 dibenzyl caffeic and 4-(dimethylamino) cinnamic acids. Proc West Pharmacol Soc 2003; 46:136-8. [PMID: 14699911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Affiliation(s)
- Victor Pérez-Alvarez
- Sección Externa de Farmacología, CINVESTAV IPN, Apartado Postal 14-740 México 07360 D.F., México.
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Fernández-Martínez E, Morales-Ríos MS, Pérez-Álvarez V, Muriel P. Effects of thalidomide and 3-phthalimido-3-(3,4-dimethoxyphenyl)-propanamide on bile duct obstruction-induced cirrhosis in the rat. Drug Dev Res 2002. [DOI: 10.1002/ddr.10022] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Morales-Ríos MS, Santos-Sánchez NF, Joseph-Nathan P. Efficient formal total synthesis of physostigmine and physovenine: conformational analysis of key intermediates. J Nat Prod 2002; 65:136-141. [PMID: 11858744 DOI: 10.1021/np010475j] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
An efficient route for the formal total synthesis of physostigmine (1) and physovenine (2), alkaloids from 5-methoxyindole-3-acetonitrile, through a Grignard reagent 1,4-addition, is described. 2-Hydroxyindolenine 5, the key advanced intermediate for the synthetic targets, was converted either to esermethole (12) via a high-yielding (28%) seven-step sequence or to the C-ring oxygenated analogue 15 in a five-step sequence and 23% overall yield. (1)H NMR and molecular modeling analyses of esermethole (12) and the furoindolines 13 and 15 were used to deconvolute weighted time-average vicinal coupling constants to provide definite solution-state conformational preferences in CD(2)Cl(2) solvent.
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Affiliation(s)
- Martha S Morales-Ríos
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, México, DF, 07000 México
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Rivera A, Torres OL, Leitón JD, Morales-Ríos MS, Joseph-Nathan P. AN EFFICIENT APPROACH TO 1,3,5-TRIS-ARYLHEXAHYDRO-1,3,5-TRIAZINES. SYNTHETIC COMMUN 2002. [DOI: 10.1081/scc-120003638] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Morales-Ríos MS, Suárez-Castillo OR, Trujillo-Serrato JJ, Joseph-Nathan P. Total syntheses of five indole alkaloids from the marine bryozoan Flustra foliacea. J Org Chem 2001; 66:1186-92. [PMID: 11312946 DOI: 10.1021/jo0012647] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A general, efficient, and conceptually new approach to the total syntheses of marine-derived indole alkaloids, including (+/-)-flustramines A (1) and B (2), (+/-)-flustramides A (3) and B (4), and (+/-)-debromoflustramine B (5), is outlined. The key step in the syntheses involves the conjugated addition of an organomagnesium species derived from prenyl bromide to 2-hydroxyindolenines. Compounds 1, 2, and 5 have been synthesized in five steps with 23%, 17%, and 16% overall yield, respectively, whereas flustramides 3 and 4 have been synthesized in only four steps with 24% and 18% overall yield, respectively, on the basis of 2-hydroxyindolenines.
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Affiliation(s)
- M S Morales-Ríos
- Departamento de Química del Centro de Investigación y de Estudios Avanzados, Instituto Politéctico Nacional, Apartado 14-740, México D. F., 07000 Mexico
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Morales-Ríos MS, Suárez-Castillo OR, Joseph-Nathan P. General Approach to the Synthesis of Marine Bryozoan Flustra foliacea Alkaloids: Total Syntheses of Debromoflustramines A and B. J Org Chem 1999. [DOI: 10.1021/jo982090k] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Martha S. Morales-Ríos
- Departamento de Química del Centro de Investigación y de Estudios Avanzados, Instituto Politéctico Nacional, Apartado 14-740, México D. F. 07000, Mexico
| | - Oscar R. Suárez-Castillo
- Departamento de Química del Centro de Investigación y de Estudios Avanzados, Instituto Politéctico Nacional, Apartado 14-740, México D. F. 07000, Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química del Centro de Investigación y de Estudios Avanzados, Instituto Politéctico Nacional, Apartado 14-740, México D. F. 07000, Mexico
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