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Maestro A, Malviya BK, Auer G, Ötvös SB, Kappe CO. A robust heterogeneous chiral phosphoric acid enables multi decagram scale production of optically active N, S-ketals. Green Chem 2024; 26:4593-4599. [PMID: 38654978 PMCID: PMC11033974 DOI: 10.1039/d4gc00019f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Accepted: 03/05/2024] [Indexed: 04/26/2024]
Abstract
Asymmetric organocatalysis has been recognized as one of the "top 10 emerging technologies" in chemistry by IUPAC in 2019. Its potential to make chemical processes more sustainable is promising, but there are still challenges that need to be addressed. Developing new and reliable enantioselective processes for reproducing batch reactions on a large scale requires a combination of chemical and technical solutions. In this manuscript, we combine a robust immobilized chiral phosphoric acid with a new packed-bed reactor design. This combination allows scaling up of the enantioselective addition of thiols to imines from a few milligrams to a multi-decagram scale in a continuous flow process without physical or chemical degradation of the catalyst.
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Affiliation(s)
- Aitor Maestro
- Department of Organic Chemistry I, University of the Basque Country, UPV/EHU Paseo de la Universidad 7 01006 Vitoria-Gasteiz Spain
- Institute of Chemistry, University of Graz, NAWI Graz A-8010 Graz Austria
| | - Bhanwar K Malviya
- Institute of Chemistry, University of Graz, NAWI Graz A-8010 Graz Austria
- Center for Continuous Flow Synthesis and Processing (CC FLOW), Research Center Pharmaceutical Engineering GmbH (RCPE) A-8010 Graz Austria
| | - Gerald Auer
- Department of Earth Sciences, University of Graz, NAWI Graz Geocenter A-8010 Graz Austria
| | - Sándor B Ötvös
- Institute of Chemistry, University of Graz, NAWI Graz A-8010 Graz Austria
- Center for Continuous Flow Synthesis and Processing (CC FLOW), Research Center Pharmaceutical Engineering GmbH (RCPE) A-8010 Graz Austria
| | - C Oliver Kappe
- Institute of Chemistry, University of Graz, NAWI Graz A-8010 Graz Austria
- Center for Continuous Flow Synthesis and Processing (CC FLOW), Research Center Pharmaceutical Engineering GmbH (RCPE) A-8010 Graz Austria
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2
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Maestro A, Nagy BS, Ötvös SB, Kappe CO. A Telescoped Continuous Flow Enantioselective Process for Accessing Intermediates of 1-Aryl-1,3-diols as Chiral Building Blocks. J Org Chem 2023; 88:15523-15529. [PMID: 37844195 PMCID: PMC10629223 DOI: 10.1021/acs.joc.3c02040] [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: 10/18/2023]
Abstract
A telescoped continuous flow process is reported for the enantioselective synthesis of chiral precursors of 1-aryl-1,3-diols, intermediates in the synthesis of ezetimibe, dapoxetine, duloxetine, and atomoxetine. The two-step sequence consists of an asymmetric allylboration of readily available aldehydes using a polymer-supported chiral phosphoric acid catalyst to introduce asymmetry, followed by selective epoxidation of the resulting alkene. The process is highly stable for at least 7 h and represents a transition-metal free enantioselective approach to valuable 1-aryl-1,3-diols.
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Affiliation(s)
- Aitor Maestro
- Department of Organic Chemistry I, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
- Institute of Chemistry, University of Graz, NAWI Graz, A-8010 Graz, Austria
| | - Bence S Nagy
- Institute of Chemistry, University of Graz, NAWI Graz, A-8010 Graz, Austria
| | - Sándor B Ötvös
- Institute of Chemistry, University of Graz, NAWI Graz, A-8010 Graz, Austria
- Center for Continuous Flow Synthesis and Processing (CC FLOW), Research Center Pharmaceutical Engineering GmbH (RCPE), A-8010 Graz, Austria
| | - C Oliver Kappe
- Institute of Chemistry, University of Graz, NAWI Graz, A-8010 Graz, Austria
- Center for Continuous Flow Synthesis and Processing (CC FLOW), Research Center Pharmaceutical Engineering GmbH (RCPE), A-8010 Graz, Austria
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3
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Maestro A, Zurro M. Phosphine-catalysed transformations of ortho- and para-quinone methides. Org Biomol Chem 2023; 21:8244-8258. [PMID: 37807758 DOI: 10.1039/d3ob01276j] [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: 10/10/2023]
Abstract
Organocatalytic methodologies for the derivatization of o-QM, p-QM and the analogous aza-QM have been recently developed and involve different catalytic systems such as phosphoric acids, thioureas, squaramides, NHC carbenes or chiral ammonium salts. Besides, phosphines, commonly used as ligands in metal-catalysed reactions, can be also used as organocatalysts. In this case, they are mainly involved as nucleophilic catalysts in reactions such as the Rauhut-Currier (RC) reaction. In this review, an analysis of the recent developments in racemic and enantioselective phosphine-catalysed transformations of o-QM, p-QM and aza-o-QM has been carried out.
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Affiliation(s)
- Aitor Maestro
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados "Lucio Lascaray" - Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
- Institute of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - Mercedes Zurro
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá (IRYCIS), 28805-Alcalá de Henares, Madrid, Spain.
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4
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Maestro A, Lemaire S, Harutyunyan SR. Cu(I)-Catalyzed Alkynylation of Quinolones. Org Lett 2022; 24:1228-1231. [PMID: 35099185 PMCID: PMC8845045 DOI: 10.1021/acs.orglett.2c00020] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Herein we report
the first alkynylation of quinolones with terminal
alkynes under mild reaction conditions. The reaction is catalyzed
by Cu(I) salts in the presence of a Lewis acid, which is essential
for the reactivity of the system. The enantioselective version of
this transformation has also been explored, and the methodology has
been applied in the synthesis of the enantioenriched tetrahydroquinoline
alkaloid cuspareine.
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Affiliation(s)
- Aitor Maestro
- Stratingh Institute for Chemistry, University of Groningen, 9747 AG Groningen,The Netherlands
| | - Sebastien Lemaire
- Janssen Pharmaceutica, Chemical Process Research & Development, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Syuzanna R. Harutyunyan
- Stratingh Institute for Chemistry, University of Groningen, 9747 AG Groningen,The Netherlands
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5
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del Corte X, Martínez de Marigorta E, Palacios F, Vicario J, Maestro A. An overview of the applications of chiral phosphoric acid organocatalysts in enantioselective additions to CO and CN bonds. Org Chem Front 2022. [DOI: 10.1039/d2qo01209j] [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: 11/21/2022]
Abstract
Since 2004, chiral phosphoric acids (CPAs) have emerged as highyl efficient organocatalysts, providing excellent results in a wide reaction scope. In this review, the applications of CPA for enantioselective additions to CO and CN bonds are covered.
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Affiliation(s)
- Xabier del Corte
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Edorta Martínez de Marigorta
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Francisco Palacios
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Javier Vicario
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Aitor Maestro
- Department of Organic Chemistry I, Faculty of Pharmacy, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
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Maestro A, del Corte X, López-Francés A, Martínez de Marigorta E, Palacios F, Vicario J. Asymmetric Synthesis of Tetrasubstituted α-Aminophosphonic Acid Derivatives. Molecules 2021; 26:3202. [PMID: 34071844 PMCID: PMC8199250 DOI: 10.3390/molecules26113202] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/22/2021] [Accepted: 05/24/2021] [Indexed: 11/16/2022] Open
Abstract
Due to their structural similarity with natural α-amino acids, α-aminophosphonic acid derivatives are known biologically active molecules. In view of the relevance of tetrasubstituted carbons in nature and medicine and the strong dependence of the biological activity of chiral molecules into their absolute configuration, the synthesis of α-aminophosphonates bearing tetrasubstituted carbons in an asymmetric fashion has grown in interest in the past few decades. In the following lines, the existing literatures for the synthesis of optically active tetrasubstituted α-aminophosphonates are summarized, comprising diastereoselective and enantioselective approaches.
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Affiliation(s)
- Aitor Maestro
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”-Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (A.M.); (X.d.C.); (A.L.-F.); (E.M.d.M.)
- Stratingh Institute for Chemistry, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Xabier del Corte
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”-Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (A.M.); (X.d.C.); (A.L.-F.); (E.M.d.M.)
| | - Adrián López-Francés
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”-Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (A.M.); (X.d.C.); (A.L.-F.); (E.M.d.M.)
| | - Edorta Martínez de Marigorta
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”-Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (A.M.); (X.d.C.); (A.L.-F.); (E.M.d.M.)
| | - Francisco Palacios
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”-Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (A.M.); (X.d.C.); (A.L.-F.); (E.M.d.M.)
| | - Javier Vicario
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”-Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (A.M.); (X.d.C.); (A.L.-F.); (E.M.d.M.)
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7
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Quintana Barcia C, Rodríguez González C, Betegón Biempica C, Álvarez Díaz G, Maestro A. ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION NUMERIC AND EXPERIMENTAL ANALYSES: INFLUENCE OF TRABECULAR BONE CONSTITUTIVE MODEL. Br J Surg 2021. [DOI: 10.1093/bjs/znab160.014] [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: 11/13/2022]
Abstract
Abstract
INTRODUCTION
The number of variables that influence the success of an ACL reconstruction is such that, the use of numerical tools becomes increasingly necessary. In this work, a finite element model is developed to simulate the ACL reconstruction in its tibial insertion.
MATERIAL AND METHODS
Tibiae and ligaments porcine samples were used in this work. As the tibial fixation, an interference screw with a nominal diameter of 7mm and a length of 25mm is used.
The plasty which replace the injured ligament was characterize using tensile tests. Uniaxial and confined compression tests, as well as indentation tests, were used for characterizing trabecular bone. Finite element methods were used for the implementation of the ACL reconstruction simulation, which studies the effect in the knee joint of all the elements involved (plasty, bone and interference screw).
RESULTS
None of the models available for the description of the trabecular bone behavior (von Mises, Hill and Crushable Foam), is capable of doing it in a completely proper manner. The use of one or the other constitutive model does not greatly influence the numerical simulation results.
CONCLUSIONS
As trabecular bone has a strongly anisotropic and non-symmetric mechanical behavior, none of the constitutive models available in the finite element code used is capable of fully describing it. Thus, the use of von Mises criterion is recommended, as it is the easiest to define and the one that requires the least numerical resources (lower computational cost).
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Affiliation(s)
| | | | | | | | - A Maestro
- Universidad de Oviedo/Hospital Begoña/Jefe servicios médicos Sporting de Gijón
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8
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del Corte X, López-Francés A, Maestro A, Martinez de Marigorta E, Palacios F, Vicario J. Brönsted Acid Catalyzed Multicomponent Synthesis of Phosphorus and Fluorine-Derived γ-Lactam Derivatives. J Org Chem 2020; 85:14369-14383. [DOI: 10.1021/acs.joc.0c00280] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Xabier del Corte
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”- Facultad de Farmacia, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Adrián López-Francés
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”- Facultad de Farmacia, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Aitor Maestro
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”- Facultad de Farmacia, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Edorta Martinez de Marigorta
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”- Facultad de Farmacia, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Francisco Palacios
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”- Facultad de Farmacia, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Javier Vicario
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”- Facultad de Farmacia, University of the Basque Country, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
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9
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Maestro A, Marigorta EM, Palacios F, Vicario J. α‐Iminophosphonates: Useful Intermediates for Enantioselective Synthesis of α‐Aminophosphonates. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000039] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Aitor Maestro
- Departamento de Química Orgánica I Centro de Investigación y Estudios Avanzados “Lucio Lascaray” Facultad de FarmaciaUniversidad del País Vasco UPV/EHU Paseo de la Universidad 7 01006 Vitoria-Gasteiz Spain
| | - Edorta Martinez Marigorta
- Departamento de Química Orgánica I Centro de Investigación y Estudios Avanzados “Lucio Lascaray” Facultad de FarmaciaUniversidad del País Vasco UPV/EHU Paseo de la Universidad 7 01006 Vitoria-Gasteiz Spain
| | - Francisco Palacios
- Departamento de Química Orgánica I Centro de Investigación y Estudios Avanzados “Lucio Lascaray” Facultad de FarmaciaUniversidad del País Vasco UPV/EHU Paseo de la Universidad 7 01006 Vitoria-Gasteiz Spain
| | - Javier Vicario
- Departamento de Química Orgánica I Centro de Investigación y Estudios Avanzados “Lucio Lascaray” Facultad de FarmaciaUniversidad del País Vasco UPV/EHU Paseo de la Universidad 7 01006 Vitoria-Gasteiz Spain
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10
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Abstract
Here, an enantioselective aza-Reformatsky reaction using acyclic ketimine substrates is presented. Using α-phosphorated ketimines as electrophilic substrates and a simple BINOL-derived ligand, phosphorated analogues of aspartic acid holding chiral tetrasubstituted carbons are efficiently obtained with excellent enantioselectivity through an asymmetric organocatalytic Reformatsky-type reaction. The phosphorated analogues of aspartic acid have been used for the synthesis of phosphorus-containing enantiopure tetrasubstituted β-lactams.
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Affiliation(s)
- Aitor Maestro
- Departamento de Química Orgánica I , Facultad de Farmacia, University of the Basque Country , UPV/EHU Paseo de la Universidad 7 , 01006 Vitoria-Gasteiz , Spain
| | - Edorta Martinez de Marigorta
- Departamento de Química Orgánica I , Facultad de Farmacia, University of the Basque Country , UPV/EHU Paseo de la Universidad 7 , 01006 Vitoria-Gasteiz , Spain
| | - Francisco Palacios
- Departamento de Química Orgánica I , Facultad de Farmacia, University of the Basque Country , UPV/EHU Paseo de la Universidad 7 , 01006 Vitoria-Gasteiz , Spain
| | - Javier Vicario
- Departamento de Química Orgánica I , Facultad de Farmacia, University of the Basque Country , UPV/EHU Paseo de la Universidad 7 , 01006 Vitoria-Gasteiz , Spain
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11
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Maestro A, del Corte X, Martinez de Marigorta E, Palacios F, Vicario J. Enantioselective synthesis of functionalized αα-aminophosphonic acid derivatives. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2018.1528258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Aitor Maestro
- Departamento de Química Orgánica I, Facultad de Farmacia, University of the Basque Country, Vitoria-Gasteiz, Spain
| | - Xabier del Corte
- Departamento de Química Orgánica I, Facultad de Farmacia, University of the Basque Country, Vitoria-Gasteiz, Spain
| | - Edorta Martinez de Marigorta
- Departamento de Química Orgánica I, Facultad de Farmacia, University of the Basque Country, Vitoria-Gasteiz, Spain
| | - Francisco Palacios
- Departamento de Química Orgánica I, Facultad de Farmacia, University of the Basque Country, Vitoria-Gasteiz, Spain
| | - Javier Vicario
- Departamento de Química Orgánica I, Facultad de Farmacia, University of the Basque Country, Vitoria-Gasteiz, Spain
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Maestro A, Martinez de Marigorta E, Palacios F, Vicario J. Enantioselective α-Aminophosphonate Functionalization of Indole Ring through an Organocatalyzed Friedel–Crafts Reaction. J Org Chem 2018; 84:1094-1102. [DOI: 10.1021/acs.joc.8b02843] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aitor Maestro
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”- Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Edorta Martinez de Marigorta
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”- Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Francisco Palacios
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”- Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Javier Vicario
- Departamento de Química Orgánica I, Centro de Investigación y Estudios Avanzados “Lucio Lascaray”- Facultad de Farmacia, University of the Basque Country, UPV/EHU Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
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Maestro A, Martín-Encinas E, Alonso C, Martinez de Marigorta E, Rubiales G, Vicario J, Palacios F. Synthesis of novel antiproliferative hybrid bis-(3-indolyl)methane phosphonate derivatives. Eur J Med Chem 2018; 158:874-883. [PMID: 30253344 DOI: 10.1016/j.ejmech.2018.09.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 09/04/2018] [Accepted: 09/04/2018] [Indexed: 12/24/2022]
Abstract
An efficient synthetic methodology for the preparation of phosphorus substituted bis-(3-indolyl)methane through a double nucleophilic addition of indole derivatives to an in situ generated α-iminophosphonate is reported. In addition, bis-(3-indolyl)methane substrates showed in vitro cytotoxicity, inhibiting the growth of carcinoma human tumor cell lines A549 (carcinomic human alveolar basal epithelial cell) and SKOV03 (human ovarian carcinoma).
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14
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del Corte X, Maestro A, Vicario J, Martinez de Marigorta E, Palacios F. Brönsted-Acid-Catalyzed Asymmetric Three-Component Reaction of Amines, Aldehydes, and Pyruvate Derivatives. Enantioselective Synthesis of Highly Functionalized γ-Lactam Derivatives. Org Lett 2017; 20:317-320. [DOI: 10.1021/acs.orglett.7b03397] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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)
- Xabier del Corte
- Departamento de Química Orgánica
I, Facultad de Farmacia, University of the Basque Country, UPV/EHU
Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Aitor Maestro
- Departamento de Química Orgánica
I, Facultad de Farmacia, University of the Basque Country, UPV/EHU
Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Javier Vicario
- Departamento de Química Orgánica
I, Facultad de Farmacia, University of the Basque Country, UPV/EHU
Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Edorta Martinez de Marigorta
- Departamento de Química Orgánica
I, Facultad de Farmacia, University of the Basque Country, UPV/EHU
Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Francisco Palacios
- Departamento de Química Orgánica
I, Facultad de Farmacia, University of the Basque Country, UPV/EHU
Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
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Maestro A, De Rivas A, Saavedra V, Torralba A. CP-098 Use of statins in elderly patients. Eur J Hosp Pharm 2014. [DOI: 10.1136/ejhpharm-2013-000436.96] [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: 11/04/2022] Open
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16
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Zanon D, Schillani G, Maestro A, Paparazzo R, Ronfani L, Marchetti F, Rovere F. DI-107 Creation of an Italian network for the active surveillance of off-label drug prescriptions in paediatrics. Eur J Hosp Pharm 2014. [DOI: 10.1136/ejhpharm-2013-000436.278] [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: 11/04/2022] Open
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18
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Solè I, Solans C, Maestro A, González C, Gutiérrez J. Study of nano-emulsion formation by dilution of microemulsions. J Colloid Interface Sci 2012; 376:133-9. [DOI: 10.1016/j.jcis.2012.02.063] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 02/24/2012] [Accepted: 02/25/2012] [Indexed: 11/15/2022]
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19
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Rodríguez C, Maestro A, García T, Rodríguez L. Comportamiento biomecánico bajo carga estática de diferentes sistemas de fijación femoral para la reconstrucción del ligamento cruzado anterior. Rev Esp Cir Ortop Traumatol (Engl Ed) 2011. [DOI: 10.1016/j.recot.2011.07.002] [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: 10/17/2022] Open
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20
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Maestro A, Ortega F, Rubio RG, Rubio MA, Krägel J, Miller R. Rheology of poly(methyl methacrylate) Langmuir monolayers: Percolation transition to a soft glasslike system. J Chem Phys 2011; 134:104704. [DOI: 10.1063/1.3560612] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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21
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Maestro A, Langevin D, Monroy F. Amorphous freezing in two dimensions: from soft coils to rigid particles. Eur Phys J E Soft Matter 2010; 31:89-94. [PMID: 20101518 DOI: 10.1140/epje/i2010-10554-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2009] [Revised: 11/17/2009] [Accepted: 12/10/2009] [Indexed: 05/28/2023]
Abstract
The topic of the gel transition in two dimensions is revisited by considering data on the shear elasticity of Langmuir monolayers of different spherical objects. Amorphous freezing can be associated to structural percolation in a lattice able to resist shear stresses. The shear modulus and its dependence on the packing fraction are found to strongly depend on the details of the interaction potential and largely differ from expectations for entropic networks. This behaviour can be interpreted in terms of more elaborated percolation theories including central forces and bond-bending forces.
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Affiliation(s)
- A Maestro
- Departamento de Química Física I, Universidad Complutense, Madrid, Spain
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22
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Maestro A, Bonales LJ, Ritacco H, Rubio RG, Ortega F. Effect of the spreading solvent on the three-phase contact angle of microparticles attached at fluid interfaces. Phys Chem Chem Phys 2010; 12:14115-20. [DOI: 10.1039/c0cp00570c] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Maestro A, Ortega F, Monroy F, Krägel J, Miller R. Molecular weight dependence of the shear rheology of poly(methyl methacrylate) Langmuir films: a comparison between two different rheometry techniques. Langmuir 2009; 25:7393-7400. [PMID: 19326872 DOI: 10.1021/la9003033] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The surface shear rheology of Langmuir monolayers of poly(methyl methacrylate) (PMMA) has been studied as a function of polymer concentration (Gamma) and molecular weight (N). Two different rheology techniques were used, one based on free damped oscillations of a ring with a sharp edge and the other based on a forced oscillation of a biconical disk. Both instruments were used in the oscillatory mode at comparable oscillation frequency and amplitude, which gave access to the viscoelastic shear modulus (S). The two instruments, working in different viscosity ranges, provide complementary and mutually compatible data. The results obtained for four PMMA samples of molecular weight between 8x10(3) and 2.7x10(5) g.mol(-1) show powerlike behavior as S approximately Gamma10 and S approximately N4. These strong dependences suggest a structural scenario based on the 2D percolation of the polymer pancakes.
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Affiliation(s)
- A Maestro
- Departamento de Química Física I, Facultad de Química, Universidad Complutense, 28040-Madrid, Spain.
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24
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Balius R, Maestro A, Pedret C, Estruch A, Mota J, Rodriguez L, Garcia P, Mauri E. Central aponeurosis tears of the rectus femoris: practical sonographic prognosis. Br J Sports Med 2009; 43:818-24. [DOI: 10.1136/bjsm.2008.052332] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [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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25
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López G, Maestro A, Llopis J, Leyes M, Forriol F. Implante meniscal de colágeno asociado a rotura del ligamento cruzado anterior. Rev Esp Cir Ortop Traumatol (Engl Ed) 2009. [DOI: 10.1016/j.recot.2008.03.001] [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: 10/21/2022] Open
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26
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Maestro A, Álvarez A, Del Valle M, Rodríguez L, Meana A, García P, Suárez E, Rodríguez C. Double-bundle anterior cruciate ligament reconstruction. Rev Esp Cir Ortop Traumatol (Engl Ed) 2009. [DOI: 10.1016/s1988-8856(09)70135-x] [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: 11/29/2022] Open
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27
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López G, Maestro A, Llopis J, Leyes M, Forriol F. Collagen meniscal implants with an associated tear of the anterior cruciate ligament. Rev Esp Cir Ortop Traumatol (Engl Ed) 2009. [DOI: 10.1016/s1988-8856(09)70136-1] [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: 11/15/2022] Open
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28
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Maestro A, Rodríguez L, Llopis J. Fracturas periprotésicas de rodilla. Rev Esp Cir Ortop Traumatol (Engl Ed) 2008. [DOI: 10.1016/s1888-4415(08)74816-1] [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: 11/29/2022] Open
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29
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Ladero F, Maestro A. Estudio comparativo de dos sistemas de medición de la laxitud del ligamento cruzado anterior. Rev Esp Cir Ortop Traumatol (Engl Ed) 2006. [DOI: 10.1016/s1888-4415(06)76394-9] [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: 11/26/2022] Open
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30
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Suárez-Suárez MA, Murcia A, Maestro A. Filling of segmental bone defects in revision knee arthroplasty using morsellized bone grafts contained within a metal mesh. Acta Orthop Belg 2002; 68:163-7. [PMID: 12051003] [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: 02/25/2023]
Abstract
For revision knee surgery with uncontained tibial bone defects, the authors report the containment of compacted morsellized allograft using metal-wire mesh, followed by implantation of a cemented total knee prosthesis. This method is comparable to the "impaction grafting technique" described for revision hip surgery and could be an alternative to metal wedges, augmented components, custom-made implants, polymethyl-methacrylate or structural bone grafts to solve some problems of cavitary and segmental bone defects in revision total knee arthroplasty.
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Affiliation(s)
- M A Suárez-Suárez
- Orthopedic and Trauma Department, Cabueñes Hospital & Oviedo University, Gijón, Spain
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31
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Huertas R, Maestro A. [Socio-economic model and the quality of life: an approximation to the concept of social health]. Cuad Complut Hist Med Cienc 2001; 2:199-221. [PMID: 11625019] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
After a brief analysis of the principal contradictions in the model of the National Health Service in the industrialised, capitalist countries which, after the second world war, acceded to the Welfare State, we shall study, within the framework of the so-called "epidemiological revolution", the way in which a degradation of the medical model of Social Security and the configuration of an ideological view directed at the individualisation of health problems, is recorded following a crisis in the Welfare State. Finally the concept of Social Health shall be expounded as a category of analysis which may permit the understanding of the methodological inexactitude which involves creating the characteristics and possibilities of a health service outside the socio-economic model.
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Affiliation(s)
- R Huertas
- Departamento de Historia de la Ciencia, Centro de Estudios Históricos, CSIC
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Maestro A, Harwin SF, Delvalle M, Caballero D, Murcia A. Preoperative calculation of the femoral transepicondylar axis: a combined radiographic and mathematical method. Am J Knee Surg 2001; 13:181-7. [PMID: 11277250] [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: 02/19/2023]
Affiliation(s)
- A Maestro
- Department of Orthopedic Surgery, Cabuenes Hospital, Gijon, Spain
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Abstract
We report a study of 2 surgical approaches to the knee in 42 consecutive patients undergoing a total arthroplasty. They were divided into 2 groups. In Group 1 (n=17) the knee was exposed through classic medial parapatellar arthrotomy and in Group 2 (n=25) the knee was approached through the fibers of the medial vastus. Preoperative assessment did not reveal any statistical differences between the groups, and blood loss, operation time, biochemistry values and radiographic evaluation were also similar. However, a higher number of lateral releases, a loss of knee extension and a reduced range of motion were significantly associated with classical parapatellar arthrotomy. As the number of operative or postoperative complications was not increased, we recommend the mid-vastus approach for total knee arthroplasty.
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Affiliation(s)
- A Maestro
- Department of Orthopaedic Surgery, Hospital of Cabuenes, Gijon, Spain
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Simón JL, Arlegui LE, Liesa CL, Maestro A. Stress perturbations registered by jointing near strike-slip, normal, and reverse faults: Examples from the Ebro Basin, Spain. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1998jb900070] [Citation(s) in RCA: 18] [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: 11/10/2022]
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Del Valle ME, Harwin SF, Maestro A, Murcia A, Vega JA. Immunohistochemical analysis of mechanoreceptors in the human posterior cruciate ligament: a demonstration of its proprioceptive role and clinical relevance. J Arthroplasty 1998; 13:916-22. [PMID: 9880185 DOI: 10.1016/s0883-5403(98)90199-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.4] [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] [Indexed: 02/01/2023] Open
Abstract
Although long-term studies report successful results with total knee arthroplasty (TKA), performed with or without posterior cruciate ligament (PCL) retention, controversy exists as to which is preferable in regard to patient outcome and satisfaction. The possible proprioceptive role of the PCL may account for a more normal feeling of the arthroplasty. Although the PCL has been examined using various histological techniques, immunohistochemical techniques are the most sensitive for neural elements. Therefore an immunohistochemical study was designed to determine the patterns of innervation, the morphological types of the proprioceptors, and their immunohistochemical profile. During TKA, samples were obtained from 22 osteoarthritic PCLs and subjected to immunohistochemical analysis with mouse monoclonal antibodies against neurofilament protein (NFP), S100 protein (S100P), epithelial membrane antigen (EMA), and vimentin (all present in neuromechanoreceptors). Three normal PCLs from cadaveric specimens were also obtained and analyzed for comparison. Five types of sensory corpuscles were observed in both the normal and the arthritic PCLs: simple lamellar, Pacini-like, Ruffini, Krause-like, and morphologically unclassified. Their structure included a central axon, inner core, and capsule in lamellar and Pacini corpuscles and variable intracorpuscular axons and periaxonal cells in the Ruffini and Krause-like corpuscles. The immunohistochemical profile showed the central axon to have NFP immunoreactivity, periaxonal cells to have S100P and vimentin immunoreactivity, and the capsule to have EMA and vimentin immunoreactivity. Nerve fibers and free nerve endings displayed NFP and S100P immunoreactivity. The immunohistochemical profile of the PCL sensory corpuscles is almost identical to that of cutaneous sensory corpuscles. Some prior histological studies of the PCL reported Golgi-like mechanoreceptors, and others found encapsulated corpuscles but no Golgi-like structures. This report determined the innervation of the PCL by the more sensitive immunohistochemical means, revealing four major types of encapsulated mechanoreceptors. The plentiful and varied types of encapsulated mechanoreceptors found in even the arthritic PCL suggests a rich proprioceptive role. It is controversial as to whether preservation of the PCL at TKA improves postoperative proprioception. Our findings tend to support those clinical reports of improved proprioception after PCL-retaining versus PCL-substituting TKAs. The presence of many and varied types of mechanoreceptors may account for the improved stair climbing reported in patients with PCL-retaining TKA and may contribute to patient satisfaction and a more normal feeling after TKA.
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Affiliation(s)
- M E Del Valle
- Department of Morphology and Biology, University of Oviedo, Spain
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Maestro A, Harwin SF, Sandoval MG, Vaquero DH, Murcia A. Influence of intramedullary versus extramedullary alignment guides on final total knee arthroplasty component position: a radiographic analysis. J Arthroplasty 1998; 13:552-8. [PMID: 9726321 DOI: 10.1016/s0883-5403(98)90055-9] [Citation(s) in RCA: 94] [Impact Index Per Article: 3.6] [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] [Indexed: 02/01/2023] Open
Abstract
A prospective study of 116 consecutive Kinemax cemented posterior cruciate ligament-retaining total knee arthroplasties was carried out. Similar surgical technique was used with a single variable: 61 were implanted using intramedullary guides on the tibia and 55 were implanted using extramedullary guides on the tibia. A radiographic study was performed after at least 1 year of follow-up to evaluate postoperative component position and compare the difference in the accuracy of positioning of the femoral and tibial components. Radiographic analysis showed that satisfactory position was achieved using both types of instrumentation. No statistically significant difference was observed in either the coronal or sagittal plane of the femoral component and the sagittal plane positioning of the tibial component. However, the coronal plane positioning of the tibial component revealed a statistically significant difference (P < .01), with intramedullary guides being superior to extramedullary guides. Also observed, was that using either technique, patients with less accurate postoperative positioning tended to be obese, with wide intramedullary canals. Patients with significant extraarticular deformities, marked bowing, and those with prior surgery or fractures may not be suitable for intramedullary guides, and they may require the use of extramedullary guides and intraoperative radiographic control. The ideal indication for the use of intramedullary instrumentation is in the patient who is not obese, with no extraarticular deformity, and with a well-defined, but not excessively wide, tibial medullary canal. Since tibial component malalignment in general, and coronal plane malalignment in particular, may adversely affect the long-term survival of total knee arthroplasties, the use of intramedullary alignment instrumentation is recommended when possible.
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Affiliation(s)
- A Maestro
- Department of Orthopaedic Surgery, Cabuenes Hospital, Gijon, Spain
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Viviani S, Binkin N, Carrieri P, Greco D, Salamina G, Salmaso S, Tozzi AE, Niccolini A, D'Argenio P, Maestro A. [Vaccinal coverage for measles and pertussis: a study in 7 regions of Italy]. Ann Ig 1995; 7:243-50. [PMID: 8679164] [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] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
During the year 1993 a series of surveys aimed to estimate the immunization coverage against measles and pertussis have been carried out in seven Italian regions and two large towns (Milan and Naples). Mothers of children aged between 12 and 23 months, randomly selected from the list of newborns, by using the EPI cluster sampling, have been interviewed in order to determine the reasons for absent or incomplete vaccinations. The observed coverage for pertussis ranges between 8% in the Molise region and 71% in the town of Milan; coverage for measles ranges between 9% in the town of Naples and 52% in the region Lombardy. The most commonly reported reason for not-vaccinating for pertussis has been the negative advise given by the caring physician. Immunization against measles has often not been administered because of relative contraindications and the negative advise by the physicians. The coverage for the two non-compulsory vaccinations are low compared to compulsory vaccinations and to the immunization level reported for most European countries, pointing out that further health education is needed for improving the up-take of such voluntary vaccinations.
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Affiliation(s)
- S Viviani
- Lab. di Epidemiologia e Biostatistica, Ist. Superiore di Sanità, Roma
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Jucker C, Rovera S, Maestro A, Squassabia A. [Radiotherapy of carcinoma of the tongue (anterior two-thirds). Possibilities of the use of high-energy electrons]. Radiol Med 1970; 56:167-88. [PMID: 4987631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Coucourde F, Rovera S, Jucker C, Maestro A. [Preliminary results of radiotherapy with the 42 MeV betatron in bronchopulmonary tumors]. Radiol Med 1969; 55:575-91. [PMID: 5204672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Coucourde F, Jucker C, Maestro A, Rovera S. [Radiotherapy of bladder neoplasms with betatron 42 MeV radiation]. Minerva Radiol 1968; 13:783-92. [PMID: 4988083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Rovera S, Maestro A, Jucker C, Coucourde F, Cacciamali I. [First experiences with clinical use of a betatron of 42 MeV]. Radiol Med 1967; 53:1011-29. [PMID: 4976443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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42
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Casolo F, Maestro A. [Tomography in oblique frontal projection in the study of the tracheo-bronchial tree]. Minerva Radiol 1967; 12:145-9. [PMID: 5609621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Maestro A. [The use of benzidamine in the treatment of mucous reactions during radiotherapy of the upper respiratory and digestive tracts neoplasms]. Radiobiol Radioter Fis Med 1967; 22:43-55. [PMID: 4973918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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