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Tlatelpa-Romero B, Contreras-Cruz DA, Guerrero-Luna G, Hernández-Linares MG, Ruiz-Salgado S, Mendoza-Milla C, Romero Y, de-la-Rosa Paredes R, Oyarzábal LF, Mendoza-Sámano DA, Galván-León JA, Vázquez-de-Lara LG. Organic synthesis of 1,2-dipalmitoyl-rac-glycero-3-phosphatidylethanolamine and its effect on the induction of apoptosis in normal human lung fibroblasts. Chem Phys Lipids 2023; 257:105349. [PMID: 37838345 DOI: 10.1016/j.chemphyslip.2023.105349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/19/2023] [Accepted: 10/11/2023] [Indexed: 10/16/2023]
Abstract
BACKGROUND /OBJECTIVE The phospholipid 1,2-dipalmitoyl-rac-glycero-3-phosphatidylethanolamine (PE) comprises two fatty acid chains: glycerol, phosphate, and ethanolamine. PE participates in critical cellular processes such as apoptosis and autophagy, which places it as a target for designing new therapeutic alternatives in diseases such as pulmonary fibrosis. Therefore, this study aimed obtain PE through a six-step organic synthesis pathway and determine its biological effect on apoptosis induction in normal human lung fibroblasts (NHLF). METHODOLOGY The first step of the organic synthesis route began with protected glycerol that was benzylated at sn-3; later, it was deprotected to react with palmitic acid at sn-1, sn-2. To remove the benzyl group, hydrogenation was performed with palladium on carbon (Pd/C); subsequently, the molecule was phosphorylated in sn-3 with phosphorus oxychloride and triethylamine, and the intermediate was hydrolyzed in an acid medium to obtain the final compound. After PE synthesis, apoptosis assessment was performed: apoptosis was induced using exposure to annexin V-FITC/propidium iodide-ECD (PI) and quantified using flow cytometry. The experiments were performed in three NHLF cell lines with different concentrations of PE 10, 100 and 1000 µg/mL for 24 and 48 h. RESULTS The PE obtained by organic synthesis presented a melting point of 190-192 °C, a purity of 95%, and a global yield of 8%. The evaluation of apoptosis with flow cytometry showed that at 24 h, exposure to PE 10, 100, and 1000 µg/mL induces early apoptosis in 19.42%- 25.54%, while late apoptosis was only significant P < 0.05 in cells challenged with 100 µg/mL PE. At 48 h, NHLF exposed to PE 10, 100, and 1000 µg/mL showed decreasing early apoptosis: 28.69-32.16%, 12.59-18.84%, and 10.91-12.61%, respectively. The rest of the NHLF exposed to PE showed late apoptosis: 12.03-16-42%, 11.04-15.94%, and 49.23-51.28%. Statistical analysis showed a significance P < 0.05 compared to the control. CONCLUSION The organic synthesis route of PE allows obtaining rac-1,2-O-Dipalmitoyl-glycero-3-phosphoethanolamine (1), which showed an apoptotic effect on NHLF.
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Affiliation(s)
- Beatriz Tlatelpa-Romero
- Programa de Maestría y Doctorado en Ciencias Médicas, Ondotológicas y de la Salud, División de Estudios de Posgrado e Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de Mexico 04510, Mexico; Laboratorio de Medicina Experimental, Facultad de Medicina, Benemérita Universidad Autónoma de Puebla, Puebla 72420, Mexico
| | | | - Gabriel Guerrero-Luna
- Centro de Química, Instituto de Ciencias. Herbario y Jardín Botánico Universitario. Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Mexico
| | - María Guadalupe Hernández-Linares
- Centro de Química, Instituto de Ciencias. Herbario y Jardín Botánico Universitario. Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Mexico
| | - Sinuhé Ruiz-Salgado
- Área Académica de Ciencias de la Tierra y Materiales, Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km. 4.5, 42184, Mexico
| | - Criselda Mendoza-Milla
- Laboratorio de Transducción de Señales, Unidad de Investigación, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Ciudad de México 14080, Mexico
| | - Yair Romero
- Facultad de Ciencias, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | | | - Luis F Oyarzábal
- Laboratorio de Medicina Experimental, Facultad de Medicina, Benemérita Universidad Autónoma de Puebla, Puebla 72420, Mexico
| | | | - Jiovani Alfredo Galván-León
- Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, Ciudad de México 09230, Mexico
| | - Luis G Vázquez-de-Lara
- Laboratorio de Medicina Experimental, Facultad de Medicina, Benemérita Universidad Autónoma de Puebla, Puebla 72420, Mexico.
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Ortiz-González A, González-Pérez PP, Cárdenas-García M, Hernández-Linares MG. In silico Prediction on the PI3K/AKT/mTOR Pathway of the Antiproliferative Effect of O. joconostle in Breast Cancer Models. Cancer Inform 2022; 21:11769351221087028. [PMID: 35356703 PMCID: PMC8958723 DOI: 10.1177/11769351221087028] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 02/22/2022] [Indexed: 01/21/2023] Open
Abstract
The search for new cancer treatments from traditional medicine involves developing studies to understand at the molecular level different cell signaling pathways involved in cancer development. In this work, we present a model of the PI3K/Akt/mTOR pathway, which plays a key role in cell cycle regulation and is related to cell survival, proliferation, and growth in cancer, as well as resistance to antitumor therapies, so finding drugs that act on this pathway is ideal to propose a new adjuvant treatment. The aim of this work was to model, simulate and predict in silico using the Big Data-Cellulat platform the possible targets in the PI3K/Akt/mTOR pathway on which the Opuntia joconostle extract acts, as well as to indicate the concentration range to be used to find the mean lethal dose in in vitro experiments on breast cancer cells. The in silico results show that, in a cancer cell, the activation of JAK and STAT, as well as PI3K and Akt is related to the effect of cell proliferation, angiogenesis, and inhibition of apoptosis, and that the extract of O. joconostle has an antiproliferative effect on breast cancer cells by inhibiting cell proliferation, regulating the cell cycle and inhibiting apoptosis through this signaling pathway . In vitro it was demonstrated that the extract shows an antiproliferative effect, causing the arrest of cells in the G2/M phase of the cell cycle. Therefore, it is concluded that the use of in silico tools is a valuable method to perform virtual experiments and discover new treatments. The use of this type of model supports in vitro experimentation, reducing the costs and number of experiments in the real laboratory.
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Affiliation(s)
- Alejandra Ortiz-González
- Laboratorio de Fisiología Celular, Facultad de Medicina, Benemérita Universidad Autónoma de Puebla, Puebla, PUE, México
| | - Pedro Pablo González-Pérez
- Departamento de Matemáticas Aplicadas y Sistemas, Universidad Autónoma Metropolitana, Unidad Cuajimalpa, México
| | - Maura Cárdenas-García
- Laboratorio de Fisiología Celular, Facultad de Medicina, Benemérita Universidad Autónoma de Puebla, Puebla, PUE, México
| | - María Guadalupe Hernández-Linares
- Laboratorio de Investigación del Jardín Botánico, Centro de Química, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Puebla, PUE, México
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3
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Bernès S, Hernández-Linares MG. N, N′-Dicyclohexyl- N-(phthaloylglycyl)urea. IUCr Data 2021; 6:x210697. [PMID: 36340662 PMCID: PMC9462355 DOI: 10.1107/s2414314621006970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 07/06/2021] [Indexed: 11/10/2022] Open
Abstract
The title urea derivative forms a one-dimensional supramolecular structure in the solid state, via intermolecular N—H⋯O hydrogen bonds. The molecular structure of the title compound {systematic name: 1,3-dicyclohexyl-1-[2-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl)acetyl]urea}, C23H29N3O4, derived from N,N′-dicyclohexylurea, shows that the tertiary N atom substituted by a cyclohexyl and phthaloylglycyl groups adopts a perfectly planar geometry (bond-angle sum = 360.0°). In the same way as for N,N′-dicyclohexylurea, the extended structure of the title compound features N—H⋯O hydrogen bonds, which generate chains of molecules running in the [001] direction.![]()
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4
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Carrasco-Carballo A, Guadalupe Hernández-Linares M, Cárdenas-García M, Sandoval-Ramírez J. Synthesis and biological in vitro evaluation of the effect of hydroxyimino steroidal derivatives on breast cancer cells. Steroids 2021; 166:108787. [PMID: 33383064 DOI: 10.1016/j.steroids.2020.108787] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 12/15/2020] [Accepted: 12/21/2020] [Indexed: 01/29/2023]
Abstract
Breast cancer is the most common cause of cancer death in women, according to Global Cancer Observatory. This fact forces scientists to continue in the search for effective treatments against this aggressive type of cancer. Breast cancer frequently metastasizes to other organs, most often the bones, lungs, and liver. Breast cancer is normally associated with estrogen and progestogen levels and can be hormone or non-hormone dependent. In current experiments herein reported, some hydroxyimino spirostan derivatives showed great potential against MCF-7 breast cancer, a Luminal-A cancer. On the other hand, a set of synthesized 6-hydroxyimino-22-oxocholestane compounds had excellent activity against the MDA-MB-231 breast cancer cell line. The synthesis of hydroxyamino derivatives from spirostan and 22-oxocholestane compounds was improved. The hydroxyimino compounds enhanced the bioactivity when compared with their parent carbonyl skeletons.
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Affiliation(s)
- Alan Carrasco-Carballo
- Facultad de Ciencias Químicas, Laboratorio de Elucidación y Síntesis en Química Orgánica, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Mexico
| | - María Guadalupe Hernández-Linares
- Herbario y Jardín Botánico Universitario, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, 72570 Puebla, Mexico; Centro de Química, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Mexico
| | - Maura Cárdenas-García
- Facultad de Medicina, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Mexico
| | - Jesús Sandoval-Ramírez
- Facultad de Ciencias Químicas, Laboratorio de Elucidación y Síntesis en Química Orgánica, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Mexico.
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5
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Martínez-Gallegos AA, Guerrero-Luna G, Ortiz-González A, Cárdenas-García M, Bernès S, Hernández-Linares MG. Azasteroids from diosgenin: Synthesis and evaluation of their antiproliferative activity. Steroids 2021; 166:108777. [PMID: 33309534 DOI: 10.1016/j.steroids.2020.108777] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 11/17/2020] [Accepted: 12/01/2020] [Indexed: 12/12/2022]
Abstract
In this work, we report the synthesis of two new azasteroids through the modification of the A and B rings of diosgenin 1. The 4-azasteroid derivative 12 was prepared in three steps using the α,β-insaturated-3-keto compound 11 as a precursor, which was first oxidized with KMnO4/KIO4 followed by an oxidative cleavage of ring A, and subsequently cyclized with an ammonium salt, under focused microwave irradiation for a short time of 3 min. A second azasteroid was synthesized, for which the key step was the Beckmann rearrangement of ring B of the oxime 16, affording the lactam-type enamide 17 in good yield. The methodologies developed for the synthesis of the precursors derivatives 10 and 11 contribute to improved yields, compared to those reported in the literature. The biological activity of the azasteroidal compounds 12 and 17 and their precursors has been evaluated in cervical cancer cells (HeLa), colon (HCT-15), and triple negative breast cancer (MDA-MB-231) lines.
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Affiliation(s)
| | - Gabriel Guerrero-Luna
- Posgrado en Ciencias Químicas. Benemérita, Universidad Autónoma de Puebla, 72570 Puebla, Pue, Mexico
| | - Alejandra Ortiz-González
- Laboratorio de Fisiología Celular, Facultad de Medicina, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue, Mexico
| | - Maura Cárdenas-García
- Laboratorio de Fisiología Celular, Facultad de Medicina, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue, Mexico
| | - Sylvain Bernès
- Instituto de Física, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue, Mexico
| | - María Guadalupe Hernández-Linares
- Centro de Química, Instituto de Ciencias. Benemérita, Universidad Autónoma de Puebla, 72570 Puebla, Pue, Mexico; Laboratorio de Investigación Herbario y Jardín Botánico Universitario, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue, Mexico.
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6
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Guerrero-Luna G, Hernández-Linares MG, Bernès S, Carrasco-Carballo A, Montalvo-Guerrero D, Fernández-Herrera MA, Sandoval-Ramírez J. Mesoscale Assembly of Bisteroidal Esters from Terephthalic Acid. Molecules 2020; 25:molecules25051213. [PMID: 32182644 PMCID: PMC7179421 DOI: 10.3390/molecules25051213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 02/24/2020] [Accepted: 03/01/2020] [Indexed: 11/16/2022] Open
Abstract
A new series of bisteroidal esters was synthesized using a spacer group, sterols and sapogenins as substrates. Steroidal dimers were prepared in high yields employing diesters of terephthalic acid as linkages at the 3β, 3'β steroidal positions. In all attempts to crystallize bisteroids, it was observed that the compounds tended to self-organize in solution, which was detected when employing various solvent systems. The non-covalent interactions (van der Waals) of the steroidal moieties of this series of symmetrical bisteroids, the polarity of the solvents systems, and the different solubilities of the bisteroid aggregates, indeed induce the molecules to self-assemble into supramolecular structures with well-defined organization. Our results show that the self-assembled structures for the bisteroidal derivatives depend on the solvent system used: with hexane/EtOAc, membrane-shaped structures were obtained, while pure EtOAc afforded strand-shaped arrangements. In the CHCl3/CH3OH system, thin strands were formed, since van der Waals interactions are lowered in this system, as a consequence of the increased solubility of the bisteroids in CHCl3. Based on the characterization by SEM and XRD, we show evidence that the phenomenon of self-assembly of bisteroids occurs presenting different morphologies depending on the solvent used. The new steroidal dimer derivatives were characterized by NMR, TGA, DSC, SEM, and XRD. Finally, the molecular structure of one bisteroid was confirmed by single-crystal X-ray analysis.
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Affiliation(s)
- Gabriel Guerrero-Luna
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico; (G.G.-L.); (A.C.-C.); (J.S.-R.)
| | - María Guadalupe Hernández-Linares
- Centro de Química, Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico
- Laboratorio de Investigación, Herbario y Jardín Botánico Universitario, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico
- Correspondence:
| | - Sylvain Bernès
- Instituto de Física, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico;
| | - Alan Carrasco-Carballo
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico; (G.G.-L.); (A.C.-C.); (J.S.-R.)
| | - Diana Montalvo-Guerrero
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados–Unidad Mérida, km 6 Antigua Carretera a Progreso, Cordemex, 97310 Mérida, Yuc., Mexico; (D.M.-G.); (M.A.F.-H.)
| | - María A. Fernández-Herrera
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados–Unidad Mérida, km 6 Antigua Carretera a Progreso, Cordemex, 97310 Mérida, Yuc., Mexico; (D.M.-G.); (M.A.F.-H.)
| | - Jesús Sandoval-Ramírez
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico; (G.G.-L.); (A.C.-C.); (J.S.-R.)
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7
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Sánchez-Sánchez L, Hernández-Linares MG, Escobar ML, López-Muñoz H, Zenteno E, Fernández-Herrera MA, Guerrero-Luna G, Carrasco-Carballo A, Sandoval-Ramírez J. Antiproliferative, Cytotoxic, and Apoptotic Activity of Steroidal Oximes in Cervicouterine Cell Lines. Molecules 2016; 21:molecules21111533. [PMID: 27854258 PMCID: PMC6273349 DOI: 10.3390/molecules21111533] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 11/04/2016] [Accepted: 11/07/2016] [Indexed: 02/06/2023] Open
Abstract
Steroidal sapogenins have shown antiproliferative effects against several tumor cell lines; and their effects on human cancer cells are currently under study. Changes in the functionality on the steroidal structure make it possible to modify the biological activity of compounds. Herein, we report the synthesis and in vitro antitumor activity of two steroidal oxime compounds on cervical cancer cells. These derivatives were synthesized from the steroidal sapogenin diosgenin in good yields. The in vitro assays show that the steroidal oximes show significant antiproliferative activity compared to the one observed for diosgenin. Cell proliferation, cell death, and the cytotoxic effects were determined in both cervical cancer cells and human lymphocytes. The cancer cells showed apoptotic morphology and an increased presence of active caspase-3, providing the notion of a death pathway in the cell. Significantly, the steroidal oximes did not exert a cytotoxic effect on lymphocytes.
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Affiliation(s)
- Luis Sánchez-Sánchez
- Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, 09230 Ciudad de México, Mexico.
| | | | - María L Escobar
- Departamento de Biología Celular, Facultad de Ciencias, Universidad Nacional Autónoma de México, 04510 Ciudad de México, Mexico.
| | - Hugo López-Muñoz
- Facultad de Estudios Superiores Zaragoza, Universidad Nacional Autónoma de México, 09230 Ciudad de México, Mexico.
| | - Edgar Zenteno
- Departamento de Bioquímica, Facultad de Medicina, Universidad Nacional Autónoma de México, 04510 Ciudad de México, Mexico.
- Centro de Investigación UNAM-UABJO, 68120 Oaxaca, Oax., Mexico.
| | - María A Fernández-Herrera
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados-Unidad Mérida, km 6 Antigua Carretera a Progreso, Cordemex, 97310 Mérida, Yuc., Mexico.
| | - Gabriel Guerrero-Luna
- Laboratorio de Investigación, Jardín Botánico Universitario, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico.
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico.
| | - Alan Carrasco-Carballo
- Laboratorio de Investigación, Jardín Botánico Universitario, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico.
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico.
| | - Jesús Sandoval-Ramírez
- Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, 72570 Puebla, Pue., Mexico.
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Hernández-Linares MG, Guerrero-Luna G, Pérez-Estrada S, Ellison M, Ortin MM, Garcia-Garibay MA. Large-Scale Green Chemical Synthesis of Adjacent Quaternary Chiral Centers by Continuous Flow Photodecarbonylation of Aqueous Suspensions of Nanocrystalline Ketones. J Am Chem Soc 2015; 137:1679-84. [DOI: 10.1021/ja512524j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Gabriel Guerrero-Luna
- Department of Chemistry
and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Salvador Pérez-Estrada
- Department of Chemistry
and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Martha Ellison
- Department of Chemistry
and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Maria-Mar Ortin
- Department of Chemistry
and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
| | - Miguel A. Garcia-Garibay
- Department of Chemistry
and Biochemistry, University of California, Los Angeles, California 90095-1569, United States
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9
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Gómez-Calvario V, Arenas-González A, Meza-Reyes S, Montiel-Smith S, Vega-Báez JL, Sandoval-Ramírez J, Hernández-Linares MG. Synthetic pathway to 22,23-dioxocholestanic chain derivatives and their usefulness for obtaining brassinosteroid analogues. Steroids 2013; 78:902-8. [PMID: 23643845 DOI: 10.1016/j.steroids.2013.04.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 03/21/2013] [Accepted: 04/21/2013] [Indexed: 11/20/2022]
Abstract
Recognizing the functionality of the pentacyclic steroidal derivative 7a as important synthon to obtain new brassinosteroid analogs, we have accomplished the derivatization of hecogenin, a sapogenin from the 25R serie containing a carbonyl group at C-12, to a 22,23-dioxocholestanic chain derivative. Starting from hecogenin acetate (5a) or hecogenin tosylate (5b), we obtained two pentacyclic derivatives (7a and 7b) which were subjected to an oxidation reaction on the double bond at C-12(23) to obtain a 22,23-dioxocholestanic chain, with the regeneration of the carbonyl group at C-12. Reduction of the carbonyl groups lead to the 20-epi-12,23-dihydroxy-22-oxo system 11a-b. The absolute configuration of compound 11a was established by X-ray diffraction analysis.
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Affiliation(s)
- Víctor Gómez-Calvario
- Benemérita Universidad Autónoma de Puebla, Facultad de Ciencias Químicas, Ciudad Universitaria, Col. San Manuel, C.P. 72570 Puebla, Pue., Mexico
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10
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Hernández-Linares MG, Sandoval-Ramírez J, Meza-Reyes S, Montiel-Smith S, Guerrero-Luna G. Stereospecific synthesis of new steroidal isoxazoles in dry media. Steroids 2011; 76:1521-6. [PMID: 21872615 DOI: 10.1016/j.steroids.2011.08.003] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 08/11/2011] [Accepted: 08/11/2011] [Indexed: 11/27/2022]
Abstract
An easy and fast procedure was developed for one-pot synthesis of steroidal isoxazoles starting from 23-acetylsapogenins derivatives in presence of P2O5/SiO2 in dry media under microwaves irradiation is described. Substrates of the 25S and 25R series were used as raw materials, establishing that this new methodology is applicable to both series.
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Affiliation(s)
- María Guadalupe Hernández-Linares
- Escuela de Ingeniería en Petróleos e Ingeniería Química, Universidad del Istmo, Ciudad Universitaria S/N, C.P. 70760 Sto. Domingo Tehuantepec, Oax., Mexico.
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