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Wehrle RJ, Ste Marie EJ, Hondal RJ, Masterson DS. Synthesis of alpha-methyl selenocysteine and its utilization as a glutathione peroxidase mimic. J Pept Sci 2019; 25:e3173. [PMID: 31074180 DOI: 10.1002/psc.3173] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/15/2019] [Accepted: 03/22/2019] [Indexed: 12/22/2022]
Abstract
Selenocysteine (Sec) is the 21st amino acid in the genetic code where this amino acid is primarily involved in redox reactions in enzymes because of its high reactivity toward oxygen and related reactive oxygen species. Sec has found wide utility in synthetic peptides, especially as a replacement for cysteine. One limitation of using Sec in synthetic peptides is that it can undergo β-syn elimination reactions after oxidation, rendering the peptide inactive due to loss of selenium. This limitation can be overcome by substituting Cα-H with a methyl group. The resulting Sec derivative is α-methylselenocysteine ((αMe)Sec). Here, we present a new strategy for the synthesis of (αMe)Sec by alkylation of an achiral methyl malonate through the use of a selenium-containing alkylating agent synthesized in the presence of dichloromethane. The seleno-malonate was then subjected to an enzymatic hydrolysis utilizing pig liver esterase followed by a Curtius rearrangement producing a protected derivative of (αMe)Sec that could be used in solid-phase peptide synthesis. We then synthesized two peptides: one containing Sec and the other containing (αMe)Sec, based on the sequence of glutathione peroxidase. This is the first reported incorporation of (αMe)Sec into a peptide as well as the first reported biochemical application of this unique amino acid. The (αMe)Sec-containing peptide had superior stability as it could not undergo β-syn elimination and it also avoided cleavage of the peptide backbone, which we surprisingly found to be the case for the Sec-containing peptide when it was incubated for 96 hours in oxygenated buffer at pH 8.0.
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Affiliation(s)
- Robert J Wehrle
- School of Mathematics and Natural Sciences, Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, MS
| | - Emma J Ste Marie
- Department of Biochemistry, University of Vermont, Burlington, VT
| | - Robert J Hondal
- Department of Biochemistry, University of Vermont, Burlington, VT
| | - Douglas S Masterson
- School of Mathematics and Natural Sciences, Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, MS
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2
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Politanskaya LV, Selivanova GA, Panteleeva EV, Tretyakov EV, Platonov VE, Nikul’shin PV, Vinogradov AS, Zonov YV, Karpov VM, Mezhenkova TV, Vasilyev AV, Koldobskii AB, Shilova OS, Morozova SM, Burgart YV, Shchegolkov EV, Saloutin VI, Sokolov VB, Aksinenko AY, Nenajdenko VG, Moskalik MY, Astakhova VV, Shainyan BA, Tabolin AA, Ioffe SL, Muzalevskiy VM, Balenkova ES, Shastin AV, Tyutyunov AA, Boiko VE, Igumnov SM, Dilman AD, Adonin NY, Bardin VV, Masoud SM, Vorobyeva DV, Osipov SN, Nosova EV, Lipunova GN, Charushin VN, Prima DO, Makarov AG, Zibarev AV, Trofimov BA, Sobenina LN, Belyaeva KV, Sosnovskikh VY, Obydennov DL, Usachev SA. Organofluorine chemistry: promising growth areas and challenges. RUSSIAN CHEMICAL REVIEWS 2019. [DOI: 10.1070/rcr4871] [Citation(s) in RCA: 94] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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3
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Fustero S, Sedgwick DM, Román R, Barrio P. Recent advances in the synthesis of functionalised monofluorinated compounds. Chem Commun (Camb) 2018; 54:9706-9725. [DOI: 10.1039/c8cc05181j] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Over the past few years, we have tackled the synthesis of interesting monofluorinated organic molecules, such as: dihydronaphthalene derivatives, β-fluoro sulfones and related carbonyl compounds, fluorohydrins and allylic alcohols.
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Affiliation(s)
- Santos Fustero
- Departamento de Química Orgánica
- Universidad de Valencia
- E-46100 Burjassot
- Spain
- Laboratorio de Moléculas Orgánicas
| | - Daniel M. Sedgwick
- Departamento de Química Orgánica
- Universidad de Valencia
- E-46100 Burjassot
- Spain
- Laboratorio de Moléculas Orgánicas
| | - Raquel Román
- Laboratorio de Moléculas Orgánicas
- Centro de Investigación Príncipe Felipe
- E-46012 Valencia
- Spain
| | - Pablo Barrio
- Departamento de Química Orgánica
- Universidad de Valencia
- E-46100 Burjassot
- Spain
- Laboratorio de Moléculas Orgánicas
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4
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Saikia I, Borah AJ, Phukan P. Use of Bromine and Bromo-Organic Compounds in Organic Synthesis. Chem Rev 2016; 116:6837-7042. [PMID: 27199233 DOI: 10.1021/acs.chemrev.5b00400] [Citation(s) in RCA: 287] [Impact Index Per Article: 35.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Bromination is one of the most important transformations in organic synthesis and can be carried out using bromine and many other bromo compounds. Use of molecular bromine in organic synthesis is well-known. However, due to the hazardous nature of bromine, enormous growth has been witnessed in the past several decades for the development of solid bromine carriers. This review outlines the use of bromine and different bromo-organic compounds in organic synthesis. The applications of bromine, a total of 107 bromo-organic compounds, 11 other brominating agents, and a few natural bromine sources were incorporated. The scope of these reagents for various organic transformations such as bromination, cohalogenation, oxidation, cyclization, ring-opening reactions, substitution, rearrangement, hydrolysis, catalysis, etc. has been described briefly to highlight important aspects of the bromo-organic compounds in organic synthesis.
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Affiliation(s)
| | - Arun Jyoti Borah
- Department of Chemistry, Gauahti University , Guwahati-781014, Assam, India
| | - Prodeep Phukan
- Department of Chemistry, Gauahti University , Guwahati-781014, Assam, India
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Lázaro R, Román R, Sedgwick DM, Haufe G, Barrio P, Fustero S. Asymmetric Synthesis of Monofluorinated 1-Amino-1,2-dihydronaphthalene and 1,3-Amino Alcohol Derivatives. Org Lett 2016; 18:948-51. [DOI: 10.1021/acs.orglett.5b03671] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rubén Lázaro
- Departamento
de Química Orgánica, Universidad de Valencia, E-46100 Burjassot, Spain
- Laboratorio
de Moléculas Orgánicas, Centro de Investigación Príncipe Felipe, E-46012 Valencia, Spain
| | - Raquel Román
- Departamento
de Química Orgánica, Universidad de Valencia, E-46100 Burjassot, Spain
| | - Daniel M. Sedgwick
- Departamento
de Química Orgánica, Universidad de Valencia, E-46100 Burjassot, Spain
| | - Günter Haufe
- Organisch-Chemisches
Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, D-48149 Münster, Germany
| | - Pablo Barrio
- Departamento
de Química Orgánica, Universidad de Valencia, E-46100 Burjassot, Spain
| | - Santos Fustero
- Departamento
de Química Orgánica, Universidad de Valencia, E-46100 Burjassot, Spain
- Laboratorio
de Moléculas Orgánicas, Centro de Investigación Príncipe Felipe, E-46012 Valencia, Spain
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6
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Schulte A, Janich S, Würthwein EU, Saito S, Wünsch B. Investigation of the Corey Bromolactamization withN-Functionalized Allylamines. J Heterocycl Chem 2015. [DOI: 10.1002/jhet.2493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Adrian Schulte
- Institut für Pharmazeutische und Medizinische Chemie; Westfälische Wilhelms-Universität Münster; Corrensstr. 48 48149 Münster Germany
| | - Simon Janich
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstr. 40 48149 Münster Germany
| | - Ernst-Ulrich Würthwein
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität Münster; Corrensstr. 40 48149 Münster Germany
| | - Susumu Saito
- Research Center for Materials Science; Nagoya University; Chikusa Nagoya 464-8602 Japan
| | - Bernhard Wünsch
- Institut für Pharmazeutische und Medizinische Chemie; Westfälische Wilhelms-Universität Münster; Corrensstr. 48 48149 Münster Germany
- Cells-in-Motion Cluster of Excellence (EXC 1003-CiM); Westfälische Wilhelms-Universität Münster; Corrensstr. 48 48149 Münster Germany
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Wang M, Luo H, Zhang M, Wang J. Why trans- or cis-Dimethyl Fumarate Addition to 2,5-Dimethylpyrrole Gives Exclusively trans-7-Azanorbornane. J Phys Chem A 2015; 119:6563-73. [PMID: 25992596 DOI: 10.1021/acs.jpca.5b03872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The addition mechanism of dimethyl fumarate into 2,5-dimethylpyrrole is explored using density functional theory (DFT) methods. Our calculations find that TpW(NO)(PMe3)(η(2)-3H-2,5-dimethylpyrrole) prefers to undergo two TpW(NO)(PMe3) migrations, two 1,5-hydride migrations, and one reductive elimination to isomerize into TpW(NO)(PMe3)(η(2)-1H-2,5-dimethylpyrrole), in which TpW(NO)(PMe3) plays a proton-transfer role. trans-Dimethyl fumarate and TpW(NO)(PMe3)(η(2)-1H-2,5-dimethylpyrrole) tend to adopt a concerted cycloaddition manner to afford trans-7-azanorbornane with a free-energy barrier of 21.8 kcal/mol. cis-Dimethyl fumarate and TpW(NO)(PMe3)(η(2)-1H-2,5-dimethylpyrrole) are the most likely to experience a concerted cycloaddition → ring opening → ring closing process to provide trans-7-azanorbornane in which the concerted cycloaddition and the ring-opening process are in dynamic equilibrium (with similar energy barriers of 21.5 and 21.9 kcal/mol, respectively). The presence of TpW(NO)(PMe3) not only promotes the cycloaddition of trans- or cis-dimethyl fumarate with 2,5-dimethylpyrrole by donating d-electrons of the W atom into the diene system of the Diels-Alder reaction, but also is favorable for the ring-opening process of the formed cis-7-azanorbornane. Furthermore, trans-azanorbornane is 7.4 kcal/mol more stable than cis-azanorbornane. Our calculations provide a new explanation of the addition of dimethyl fumarate with 2,5-dimethylpyrrole exclusively giving trans-7-azanorbornane.
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Affiliation(s)
- Mian Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Hao Luo
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Min Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
| | - Jianyi Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China
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9
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Onogi S, Higashibayashi S, Sakurai H. Microwave-assisted synthesis of methyl (1S,2R,4S,5S)-7-aza-5-hydroxybicyclo[2.2.1]heptane-2-carboxylate through unexpected stereoselective substitution reaction. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.04.098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Hřebabecký H, Dejmek M, Dračínský M, Šála M, Leyssen P, Neyts J, Kaniaková M, Krůšek J, Nencka R. Synthesis of novel azanorbornylpurine derivatives. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.11.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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11
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2-Azidoethoxy derivatives of 2-aminocyclohexanecarboxylic acids (ACHC): interesting building blocks for the synthesis of cyclic β-peptide conjugates. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.05.131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Reddy DN, Prabhakaran EN. Synthesis and Isolation of 5,6-Dihydro-4H-1,3-Oxazine Hydrobromides by Autocyclization of N-(3-Bromopropyl)amides. J Org Chem 2010; 76:680-3. [DOI: 10.1021/jo101955q] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Damodara N. Reddy
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, India 560012
| | - Erode N. Prabhakaran
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, India 560012
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13
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Hosoya M, Otani Y, Kawahata M, Yamaguchi K, Ohwada T. Water-Stable Helical Structure of Tertiary Amides of Bicyclic β-Amino Acid Bearing 7-Azabicyclo[2.2.1]heptane. Full Control of Amide Cis−Trans Equilibrium by Bridgehead Substitution. J Am Chem Soc 2010; 132:14780-9. [DOI: 10.1021/ja1017877] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masahiro Hosoya
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki, Kagawa 769-2193, Japan
| | - Yuko Otani
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki, Kagawa 769-2193, Japan
| | - Masatoshi Kawahata
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki, Kagawa 769-2193, Japan
| | - Kentaro Yamaguchi
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki, Kagawa 769-2193, Japan
| | - Tomohiko Ohwada
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, and Department of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, 1314-1 Shido, Sanuki, Kagawa 769-2193, Japan
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14
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Forró E, Schönstein L, Kiss L, Vega-Peñaloza A, Juaristi E, Fülöp F. Direct enzymatic route for the preparation of novel enantiomerically enriched hydroxylated beta-amino ester stereoisomers. Molecules 2010; 15:3998-4010. [PMID: 20657421 PMCID: PMC6264416 DOI: 10.3390/molecules15063998] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2010] [Revised: 05/25/2010] [Accepted: 05/28/2010] [Indexed: 11/16/2022] Open
Abstract
Enantiomerically enriched hydroxy-substituted beta-amino esters have been synthesized through CAL-B-catalyzed enantioselective hydrolysis in organic media. Moderate to good enantiomeric excess values (ee > or = 52%) were obtained when the CAL-B-catalyzed reactions were performed in t-BuOMe, at 60 degrees C with 0.5 equiv. of added H(2)O as nucleophile.
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Affiliation(s)
- Enikő Forró
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
| | - László Schönstein
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
| | - Loránd Kiss
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
| | - Alberto Vega-Peñaloza
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional 2508 Col. San Pedro Zacatenco, 07360 México, D.F. Apartado Postal 14-740, 07000, D.F., Mexico
| | - Eusebio Juaristi
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Av. Instituto Politécnico Nacional 2508 Col. San Pedro Zacatenco, 07360 México, D.F. Apartado Postal 14-740, 07000, D.F., Mexico
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
- Research Group of Stereochemistry of the Hungarian Academy of Sciences, University of Szeged, H-6720 Szeged, Eötvös u. 6, Hungary
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15
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Forró E, Fülöp F. New Enzymatic Two-Step Cascade Reaction for the Preparation of a Key Intermediate for the Taxol Side-Chain. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000262] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Gómez E, Marco-Contelles J, Soriano E, Jimeno ML. N-Arylmethyl-7-azabicyclo[2.2.1]heptane derivatives: synthesis and reaction mechanisms. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.09.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Benedek G, Palkó M, Wéber E, Martinek TA, Forró E, Fülöp F. Efficient synthesis of 3,4- and 4,5-dihydroxy-2-amino-cyclohexanecarboxylic acid enantiomers. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.09.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Jenkins ID, Lacrampe F, Ripper J, Alcaraz L, Le PV, Nikolakopoulos G, de Almeida Leone P, White RH, Quinn RJ. Synthesis of four novel natural product inspired scaffolds for drug discovery. J Org Chem 2009; 74:1304-13. [PMID: 19105637 DOI: 10.1021/jo802456w] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Inspired by the novel spiro structures of a number of bioactive natural products such as the histrionicotoxins, a series of novel spiro scaffolds have been designed and robust syntheses developed. The scaffolds are ready-to-use building blocks and can be easily prepared on a 5-20 g scale. They contain two amino groups (one Boc-protected) and have been designed for ease of conversion to a lead generation library, using either amide formation or reductive amination procedures. The synthesis of the 1,9-diazaspiro[5.5]undecane and 3,7-diazaspiro[5.6]dodecane ring systems was achieved using RCM as the key step. A simple workup procedure is reported for the removal of highly colored ruthenium residues. The synthesis of the 1,8-diazaspiro[4.5]decane scaffold has been achieved using a bromine-mediated 5-endo cyclization of the corresponding 4-aminobutene intermediate under acidic conditions. This is the first example of this type of cyclization to be reported. A novel mechanism involving a bromine transfer reaction from an initially formed bromonium ion to a neighboring nitrogen atom is suggested as the reason for the failure of this type of reaction under "normal" bromination conditions. An unusual rearrangement of a 1-acyl-1,9-diazaspiro[5.5]undecane to the corresponding 9-acyl-1,9-diazaspiro[5.5]undecane is reported.
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Affiliation(s)
- Ian D Jenkins
- Eskitis Institute, Griffith University, Brisbane, QLD, 4111, Australia.
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19
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Soriano E, Marco-Contelles J. Mechanistic analysis of intramolecular free radical reactions toward synthesis of 7-azabicyclo[2.2.1]heptane derivatives. J Org Chem 2009; 74:4061-7. [PMID: 19402620 DOI: 10.1021/jo900225f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanisms for the formation of conformationally constrained epibatidine analogues by intramolecular free radical processes have been computationally addressed by means of DFT methods. The mechanism and the critical effect of the 7-nitrogen protecting group on the outcome of these radical-mediated cyclizations are discussed. Theoretical findings account for unexpected experimental results and can assist in the selection of proper precursors for a successful cyclization.
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Affiliation(s)
- Elena Soriano
- Laboratorio de Radicales Libres y Química Computacional, IQOG (CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.
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20
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Krief A, Jeanmart S, Kremer A. Diastereoselective Bromination of Compounds Bearing a Cyclohex-3-enol Moiety: Application to the Enantioselective Synthesis of (1R)-cis-Deltamethrinic Acid. J Org Chem 2008; 73:9795-7. [DOI: 10.1021/jo8022507] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alain Krief
- Laboratoire de Chimie Organique de Synthèse, Facultés Universitaires N.-D. de la Paix, 61 rue de Bruxelles, Namur, B-5000, Belgium
| | - Stephane Jeanmart
- Laboratoire de Chimie Organique de Synthèse, Facultés Universitaires N.-D. de la Paix, 61 rue de Bruxelles, Namur, B-5000, Belgium
| | - Adrian Kremer
- Laboratoire de Chimie Organique de Synthèse, Facultés Universitaires N.-D. de la Paix, 61 rue de Bruxelles, Namur, B-5000, Belgium
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21
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Zhou L, Jiang HF, Li CJ. Efficient Synthesis of γ,δ-Alkynyl-β-amino Acid Derivatives by a New Copper-Catalyzed Amine-Alkyne-Alkyne Addition Reaction. Adv Synth Catal 2008. [DOI: 10.1002/adsc.200800447] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Gómez-Sánchez E, Soriano E, Marco-Contelles J. Synthesis of heterocyclic analogues of epibatidine via 7-azabicyclo[2.2.1]hept-2-yl radical intermediates. 1. Intermolecular reactions. J Org Chem 2008; 73:6784-92. [PMID: 18656981 DOI: 10.1021/jo8011094] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and reactivity of the 7-azabicyclo[2.2.1]hept-2-yl radical has been extensively investigated in inter- and intramolecular reaction processes for the first time. In this work we will present the preparation of the radical and its successful intermolecular reaction with radical acceptors such as tert-butylisocyanide and acrylonitrile. Computational analyses have been carried out to show and explain the mechanisms and stereochemical outcome of these transformations. Overall and from the chemical point of view, a new and convenient synthetic approach has been developed for the synthesis of exo-2-(cyano)alkyl substituted 7-azabicyclo[2.2.1]heptane derivatives, a series of compounds of wide interest for the synthesis of heterocyclic analogues of epibatidine. As a result, we describe here the synthesis of the tetrazoloepibatidines (8 and 15) and the oxadiazoloepibatidine (10).
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Affiliation(s)
- Elena Gómez-Sánchez
- Laboratorio de Radicales Libres, IQOG (CSIC), C/Juan de la Cierva 3, 28006-Madrid, Spain
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23
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Forró E, Fülöp F. Vapour-assisted enzymatic hydrolysis of β-lactams in a solvent-free system. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.04.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Gómez-Sánchez E, Soriano E, Marco-Contelles J. Synthesis of 7-Azabicyclo[2.2.1]heptane and 2-Oxa-4-azabicyclo[3.3.1]non-3-ene Derivatives by Base-Promoted Heterocyclization of Alkyl N-(cis(trans)-3,trans(cis)-4-Dibromocyclohex-1-yl)carbamates and N-(cis(trans)-3,trans(cis)-4-Dibromocyclohex-1-yl)-2,2,2-trifluoroacetamides. J Org Chem 2007; 72:8656-70. [DOI: 10.1021/jo701625a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elena Gómez-Sánchez
- Laboratorio de Radicales Libres, IQOG (CSIC), C/Juan de la Cierva 3, 28006-Madrid, Spain, and Laboratorio de Resonancia Magnética, Instituto de Investigaciones Biomédicas (CSIC), C/Arturo Duperier 4, 28029-Madrid, Spain
| | - Elena Soriano
- Laboratorio de Radicales Libres, IQOG (CSIC), C/Juan de la Cierva 3, 28006-Madrid, Spain, and Laboratorio de Resonancia Magnética, Instituto de Investigaciones Biomédicas (CSIC), C/Arturo Duperier 4, 28029-Madrid, Spain
| | - José Marco-Contelles
- Laboratorio de Radicales Libres, IQOG (CSIC), C/Juan de la Cierva 3, 28006-Madrid, Spain, and Laboratorio de Resonancia Magnética, Instituto de Investigaciones Biomédicas (CSIC), C/Arturo Duperier 4, 28029-Madrid, Spain
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Abstract
A straightforward synthesis of 8-azabicyclo[3.2.1]octane-1-carboxylic acid, a new proline analogue with a bicyclic structure, is described. The procedure makes use of readily available starting materials and involves simple, high-yielding transformations.
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