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Gausmann M, Kreidt N, Christmann M. Electrosynthesis of Protected Dehydroamino Acids. Org Lett 2023; 25:2228-2232. [PMID: 36952622 DOI: 10.1021/acs.orglett.3c00403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
A NaCl-mediated electrochemical oxidation of amino acid carbamates (R1 = Boc, Cbz) afforded α-methoxylated α-amino acids. Subsequent acid-catalyzed elimination delivered valuable dehydroamino acid derivatives. The simplicity of our setup using graphite-electrodes was showcased, producing N-Boc-ΔAla-OMe on a decagram scale.
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Affiliation(s)
- Marcel Gausmann
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Nadine Kreidt
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Mathias Christmann
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
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2
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Retini M, Bartolucci S, Bartoccini F, Piersanti G. Asymmetric Alkylation of Cyclic Ketones with Dehydroalanine via H-Bond-Directing Enamine Catalysis: Straightforward Access to Enantiopure Unnatural α-Amino Acids. Chemistry 2022; 28:e202201994. [PMID: 35916657 PMCID: PMC9805190 DOI: 10.1002/chem.202201994] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Indexed: 01/09/2023]
Abstract
The growing importance of structurally diverse and functionalized enantiomerically pure unnatural amino acids in the design of drugs, including peptides, has stimulated the development of new synthetic methods. This study reports the challenging direct asymmetric alkylation of cyclic ketones with dehydroalanine derivatives via a conjugate addition reaction for the synthesis of enantiopure ketone-based α-unnatural amino acids. The key to success was the design of a bifunctional primary amine-thiourea catalyst that combines H-bond-directing activation and enamine catalysis. The simultaneous dual activation of the two relatively unreactive partners, confirmed by mass spectrometry studies, results in high reactivity while securing high levels of stereocontrol. A broad substrate scope is accompanied by versatile downstream chemical modifications. The mild reaction conditions and consistently excellent enantioselectivities (>95 % ee in most cases) render this protocol highly practical for the rapid construction of valuable noncanonical enantiopure α-amino-acid building blocks.
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Affiliation(s)
- Michele Retini
- Department of Biomolecular SciencesUniversity of Urbino Carlo BoPiazza Rinascimento 661029UrbinoPUItaly
| | - Silvia Bartolucci
- Department of Biomolecular SciencesUniversity of Urbino Carlo BoPiazza Rinascimento 661029UrbinoPUItaly
| | - Francesca Bartoccini
- Department of Biomolecular SciencesUniversity of Urbino Carlo BoPiazza Rinascimento 661029UrbinoPUItaly
| | - Giovanni Piersanti
- Department of Biomolecular SciencesUniversity of Urbino Carlo BoPiazza Rinascimento 661029UrbinoPUItaly
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3
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Shybanov DE, Kukushkin ME, Tafeenko VA, Zyk NV, Grishin YK, Roznyatovsky VA, Beloglazkina EK. Different addition modes of cyclopentadiene and furan at methylidene(thio)hydantoins. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.03.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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4
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Boto A, González CC, Hernández D, Romero-Estudillo I, Saavedra CJ. Site-selective modification of peptide backbones. Org Chem Front 2021. [DOI: 10.1039/d1qo00892g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Exciting developments in the site-selective modification of peptide backbones are allowing an outstanding fine-tuning of peptide conformation, folding ability, and physico-chemical and biological properties.
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Affiliation(s)
- Alicia Boto
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206-La Laguna, Tenerife, Spain
| | - Concepción C. González
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206-La Laguna, Tenerife, Spain
| | - Dácil Hernández
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206-La Laguna, Tenerife, Spain
| | - Iván Romero-Estudillo
- Centro de Investigaciones Químicas-IICBA, Universidad Autónoma del Estado de Morelos. Av. Universidad 1001, Cuernavaca, Morelos 62209, Mexico
- Catedrático CONACYT-CIQ-UAEM, Mexico
| | - Carlos J. Saavedra
- Instituto de Productos Naturales y Agrobiología del CSIC, Avda. Astrofísico Francisco Sánchez 3, 38206-La Laguna, Tenerife, Spain
- Programa Agustín de Betancourt, Universidad de la Laguna, 38200 Tenerife, Spain
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5
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Retini M, Bartolucci S, Bartoccini F, Mari M, Piersanti G. Concise and Convergent Enantioselective Total Syntheses of (+)- and (-)-Fumimycin. J Org Chem 2019; 84:12221-12227. [PMID: 31476858 DOI: 10.1021/acs.joc.9b02020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The concise and convergent total syntheses of (+)- and (-)-Fumimycin have been achieved by taking advantage of strategies for the asymmetric aza-Friedel-Crafts reaction of a highly substituted hydroquinone and N-fumaryl ketimine generated from the corresponding dehydroalanine. The enantiomerically pure natural product and its enantiomer were prepared in seven steps and 22% overall yield by employing both enantiomers of a BINOL-derived chiral phosphoric acid (CPA) catalyst.
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Affiliation(s)
- Michele Retini
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Silvia Bartolucci
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Francesca Bartoccini
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Michele Mari
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Giovanni Piersanti
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
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6
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Zaghouani M, Bögeholz LAK, Mercier E, Wintermeyer W, Roche SP. Total synthesis of (±)-fumimycin and analogues for biological evaluation as peptide deformylase inhibitors. Tetrahedron 2019; 75:3216-3230. [PMID: 31555018 PMCID: PMC6759494 DOI: 10.1016/j.tet.2019.03.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A concise 7-step total synthesis of (±)-fumimycin in 11.6 % overall yield is reported. An acid-catalyzed intramolecular aza-Friedel-Crafts cyclization was developed to construct the benzofuranone skeleton of the natural product bearing an α,α-disubstituted amino acid moiety in a single step. Regioselective chlorination followed by a Suzuki-Miyaura cross-coupling rapidly enabled the preparation of a library of analogues which were evaluated against peptide deformylase for antibacterial activity.
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Affiliation(s)
- Mehdi Zaghouani
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, USA
| | - Lena A. K. Bögeholz
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany
| | - Evan Mercier
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany
| | - Wolfgang Wintermeyer
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, Göttingen 37077, Germany
| | - Stéphane P. Roche
- Department of Chemistry and Biochemistry, Florida Atlantic University, Boca Raton, Florida 33431, USA
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7
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Bogart JW, Bowers AA. Dehydroamino acids: chemical multi-tools for late-stage diversification. Org Biomol Chem 2019; 17:3653-3669. [PMID: 30849157 PMCID: PMC6637761 DOI: 10.1039/c8ob03155j] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
α,β-Dehydroamino acids (dhAAs) are noncanonical amino acids that are found in a wide array of natural products and can be easily installed into peptides and proteins. dhAAs exhibit remarkable synthetic flexibility, readily undergoing a number of reactions, such as polar and single-electron additions, transition metal catalyzed cross-couplings, and cycloadditions. Because of the relatively mild conditions required for many of these reactions, dhAAs are increasingly being used as orthogonal chemical handles for late-stage modification of biomolecules. Still, only a fraction of the chemical reactivity of dhAAs has been exploited in such biorthogonal applications. Herein, we provide an overview of the broad spectrum of chemical reactivity of dhAAs, with special emphasis on recent efforts to adapt such transformations for biomolecules such as natural products, peptides, and proteins. We also discuss examples of enzymes from natural product biosynthetic pathways that have been found to catalyze many similar reactions; these enzymes provide mild, regio- and stereoselective, biocatalytic alternatives for future development. We anticipate that the continued investigation of the innate reactivity of dhAAs will furnish a diverse portfolio dhAA-based chemistries for use in chemical biology and drug discovery.
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Affiliation(s)
- Jonathan W Bogart
- Division of Chemical Biology and Medicinal Chemistry Eshelman School of Pharmacy, and Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
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8
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Zhou Z, Hu Y, Wang B, He X, Ren G, Feng L. A Concise Synthesis of (±)-Methoxyfumimycin Ethyl Ester. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/174751914x14011142030158] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Zhiwang Zhou
- School of Pharmaceutical Sciences, Nanchang University, Nanchang, 330006, Jiangxi, P.R. China
| | - Yu Hu
- Department of Chemistry, Nanchang University, Nanchang, 330031, Jiangxi, P.R. China
| | - Bin Wang
- School of Pharmaceutical Sciences, Nanchang University, Nanchang, 330006, Jiangxi, P.R. China
| | - Xiaoru He
- Key Laboratory of Modern Preparation of TCM, Jiangxi University of Traditional Chinese Medicine, Ministry of Education, Nanchang 330004, Jiangxi, P.R. China
| | - Gang Ren
- Key Laboratory of Modern Preparation of TCM, Jiangxi University of Traditional Chinese Medicine, Ministry of Education, Nanchang 330004, Jiangxi, P.R. China
| | - Lihua Feng
- School of Pharmaceutical Sciences, Nanchang University, Nanchang, 330006, Jiangxi, P.R. China
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9
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Bartoccini F, Mari M, Retini M, Bartolucci S, Piersanti G. Organocatalytic Aza-Friedel-Crafts/Lactonization Domino Reaction of Naphthols and Phenols with 2-Acetamidoacrylate to Naphtho- and Benzofuranones Bearing a Quaternary Center at the C3 Position. J Org Chem 2018; 83:12275-12283. [PMID: 30191715 DOI: 10.1021/acs.joc.8b01774] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
N-Acetyl ketimine generated from methyl 2-acetamidoacrylate was explored to develop an unprecedented domino aza-Friedel-Crafts/lactonization reaction with naphthols and phenols (including 5-hydroxyindoles). This novel method requires a catalyst loading of only 5 mol % of a phosphoric acid catalyst and provides a new series of 3-NHAc-naphtho- and benzofuranone derivatives bearing tetra-substituted stereogenic centers in moderate-to-good yields. The enantioselective variant using BINOL-derived phosphoric acids was also explored with 1-naphthol, providing the desired product with moderate enantioselectivities (up to 99:1 following recrystallization).
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Affiliation(s)
- Francesca Bartoccini
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Michele Mari
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Michele Retini
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Silvia Bartolucci
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
| | - Giovanni Piersanti
- Department of Biomolecular Sciences , University of Urbino "Carlo Bo" , P.zza Rinascimento 6 , 61029 Urbino , PU , Italy
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10
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Gilfillan L, Artschwager R, Harkiss AH, Liskamp RMJ, Sutherland A. Synthesis of pyrazole containing α-amino acids via a highly regioselective condensation/aza-Michael reaction of β-aryl α,β-unsaturated ketones. Org Biomol Chem 2015; 13:4514-23. [DOI: 10.1039/c5ob00364d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A new class of α-amino acid incorporating 5-aryl pyrazole units have been prepared using a highly regioselective condensation/aza-Michael reaction of β-aryl α,β-unsaturated ketones.
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Affiliation(s)
- Lynne Gilfillan
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | - Raik Artschwager
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | - Alexander H. Harkiss
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | - Rob M. J. Liskamp
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
| | - Andrew Sutherland
- WestCHEM
- School of Chemistry
- The Joseph Black Building
- University of Glasgow
- Glasgow
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11
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Kotha S, Bandarugattu VB, Krishna NG. Diversity-oriented approach to unusual amino acid derivatives and heterocycles via methyl 2-acetamidoacrylate and its congeners. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.05.056] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Pirovano V, Facoetti D, Dell'Acqua M, Della Fontana E, Abbiati G, Rossi E. Gold(I) or silver catalyzed synthesis of α-indolylacrylates. Org Lett 2013; 15:3812-5. [PMID: 23859310 DOI: 10.1021/ol401716b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Methyl 2-acetamidoacrylate reacted with various 2-substituted indoles in the presence of catalytic amounts of AgSbF6 or AuPPh3NTf2 to provide the corresponding methyl 2-(2-substituted-1H-indol-3-yl)acrylates.
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Affiliation(s)
- Valentina Pirovano
- Dipartimento di Scienze Farmaceutiche, Sezione di Chimica Generale e Organica A. Marchesini, Via Venezian, 21, 20133 Milano, Italy
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13
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Lucarini S, Mari M, Piersanti G, Spadoni G. Organocatalyzed coupling of indoles with dehydroalanine esters: synthesis of bis(indolyl)propanoates and indolacrylates. RSC Adv 2013. [DOI: 10.1039/c3ra42922a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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14
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Zhou ZW, Li WC, Hu Y, Wang B, Ren G, Feng LH. Synthesis of the intermediate for fumimycin: a natural peptide deformylase inhibitor. RESEARCH ON CHEMICAL INTERMEDIATES 2012. [DOI: 10.1007/s11164-012-0817-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Dörr AA, Lubell WD. Synthesis of Protected 2-Pyrrolylalanine for Peptide Chemistry and Examination of Its Influence on Prolyl Amide Isomer Equilibrium. J Org Chem 2012; 77:6414-22. [DOI: 10.1021/jo3005809] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aurélie A. Dörr
- Département de Chimie, Université de Montréal, C.P.6128. Succursale Centre-Ville,
Montréal, Québec, Canada H3C 3J7
| | - William D. Lubell
- Département de Chimie, Université de Montréal, C.P.6128. Succursale Centre-Ville,
Montréal, Québec, Canada H3C 3J7
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16
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Righi M, Bartoccini F, Lucarini S, Piersanti G. Organocatalytic synthesis of α-quaternary amino acid derivatives via aza-Friedel–Crafts alkylation of indoles with simple α-amidoacrylates. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.08.039] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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17
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18
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Thirumalairajan S, Pearce BM, Thompson A. Chiral molecules containing the pyrrole framework. Chem Commun (Camb) 2010; 46:1797-812. [DOI: 10.1039/b926045e] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthetic routes to chiral molecules containing a pyrrolic ring are discussed: strategies include formation of the pyrrole ring using starting materials appended with chirality, as well as the attachment of chirality to a pre-formed pyrrole.
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Affiliation(s)
| | - Beth M. Pearce
- Department of Chemistry
- Dalhousie University
- Halifax
- Canada
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19
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Gross PJ, Hartmann CE, Nieger M, Bräse S. Synthesis of Methoxyfumimycin with 1,2-Addition to Ketimines. J Org Chem 2009; 75:229-32. [DOI: 10.1021/jo902026s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Patrick J. Gross
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
| | - Caroline E. Hartmann
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
| | - Martin Nieger
- Laboratory of Inorganic Chemistry, University of Helsinki, 00014 Helsinki, Finland
| | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
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20
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Topuzyan VO, Kazandzhyan MM, Tamazyan RA, Aivazyan AG. Derivatives of α,β-dehydroamino acids: V. Intramolecular cyclization of 2-{2-[(Z)-1-Benzamido-2-phenylvinyl]acetamidomethyl}benzimidazole. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2009. [DOI: 10.1134/s1070428009020109] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Hartmann CE, Gross PJ, Nieger M, Bräse S. Towards an asymmetric synthesis of the bacterial peptide deformylase (PDF) inhibitor fumimycin. Org Biomol Chem 2009; 7:5059-62. [DOI: 10.1039/b916372g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Angelini E, Balsamini C, Bartoccini F, Lucarini S, Piersanti G. Switchable Reactivity of Acylated α, β-Dehydroamino Ester in the Friedel−Crafts Alkylation of Indoles by Changing the Lewis Acid. J Org Chem 2008; 73:5654-7. [DOI: 10.1021/jo800881u] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elena Angelini
- Institute of Medicinal Chemistry, University of Urbino “Carlo Bo”, Piazza del Rinascimento 6, 61029 Urbino (PU), Italy
| | - Cesarino Balsamini
- Institute of Medicinal Chemistry, University of Urbino “Carlo Bo”, Piazza del Rinascimento 6, 61029 Urbino (PU), Italy
| | - Francesca Bartoccini
- Institute of Medicinal Chemistry, University of Urbino “Carlo Bo”, Piazza del Rinascimento 6, 61029 Urbino (PU), Italy
| | - Simone Lucarini
- Institute of Medicinal Chemistry, University of Urbino “Carlo Bo”, Piazza del Rinascimento 6, 61029 Urbino (PU), Italy
| | - Giovanni Piersanti
- Institute of Medicinal Chemistry, University of Urbino “Carlo Bo”, Piazza del Rinascimento 6, 61029 Urbino (PU), Italy
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23
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Saçmaci M, Ungören SH, Akçamur Y. Preparation and characterization of novel pyrrol-3-ones attached to α/β-amino acids, esters and amides. Amino Acids 2006; 31:397-401. [PMID: 16729189 DOI: 10.1007/s00726-006-0340-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2005] [Accepted: 03/24/2006] [Indexed: 11/25/2022]
Abstract
Various alpha/beta amino acid derivatives 5 were attached to compounds 3 to yield 2,3-dihydro-1H-pyrrol-3-ones amino acids derivatives 6. This rare heterocyclic amino acid skeleton including the pyrrolo[1,2-b][1,3]oxazol moiety was also successfully prepared in the esteric form. The structure of the new compounds was characterized by spectroscopic methods.
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Affiliation(s)
- M Saçmaci
- Department of Chemistry, Yozgat Faculty of Arts and Sciences, Erciyes University, Yozgat, Turkey
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24
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Dı́ez-Barra E, Guerra J, Hornillos V, Merino S, Tejeda J. Double Michael addition of azoles to methyl propiolate: a straightforward entry to ligands with two heterocyclic rings. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.07.083] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Siwicka A, Zawadzka A, Wojtasiewicz K, Maurin JK, Leniewski A, Czarnocki Z. Towards Enantioselective Synthesis Of Tryptophan-Derived Alkaloids. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2003; 527:637-41. [PMID: 15206783 DOI: 10.1007/978-1-4615-0135-0_73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Tryptamine was subjected to a series of reactions with derivatives of L-Ala, L-Val that ended with final diketopiperazines 9 and 10, having (R) configuration on the newly created, via 1,4-chirality transfer, stereogenic center. On the other hand, when L-Pro was used the opposite chirality sense was formed at this position.
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Affiliation(s)
- Aleksandra Siwicka
- Faculty of Chemistry, Warsaw University, Pasteur St. 1, 02-093, Warsaw, Poland
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26
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Chapter 5.2 Five membered ring systems: Pyrroles and benzo derivatives. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0959-6380(02)80008-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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