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Žukauskas M, Grybaitė B, Jonutė P, Vaickelionienė R, Gibieža P, Vaickelionis G, Dragūnaitė B, Anusevičius K, Mickevičius V, Petrikaitė V. Evaluation of N-aryl-β-alanine derivatives as anticancer agents in triple-negative breast cancer and glioblastoma in vitro models. Bioorg Chem 2021; 115:105214. [PMID: 34426161 DOI: 10.1016/j.bioorg.2021.105214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 07/16/2021] [Accepted: 07/24/2021] [Indexed: 11/24/2022]
Abstract
Synthesis of β-amino acid derivatives containing hydrazone and azole moieties is described. For this purpose, the appropriate hydrazide was treated with aromatic aldehydes, ketones and phenyl iso(thio)cyanates to obtain the desired outcome. The synthesized target compounds were evaluated for their anticancer properties. The assay displayed 3,3'-((2,6-diethylphenyl)azanediyl)bis(N'-(benzylidene)propanehydrazide) to possess the convincing anticancer effect against triple-negative breast cancer cells in vitro. To further study the anticancer properties of compounds containing a hydrazone moiety in breast cancer, series of previously and newly prepared dihydrazones were investigated. It was determined that derivatives with the bis(N'-(4-bromobenzylidene) fragment in the structure are exclusively cytotoxic to cancer cells. The most active compounds against both cell lines were those containing electron withdrawing 4-BrPh or 4-ClPh moieties, together with either chlorine, bromine or iodine groups in para position of phenyl ring. Selected two representative compounds showed migrastatic activity in MDA-MB-231 cell line, where both of them reduced the growth of breast cancer and glioblastoma cell 3D cultures and inhibited cell colony formation. 2009 Elsevier Ltd. All rights reserved.
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Affiliation(s)
| | - Birutė Grybaitė
- Kaunas University of Technology, Radvilėnų pl. 19, Kaunas 50254, Lithuania.
| | - Paulina Jonutė
- Lithuanian University of Health Sciences, A. Mickevičiaus g. 9, Kaunas LT-44307, Lithuania
| | | | - Paulius Gibieža
- Lithuanian University of Health Sciences, A. Mickevičiaus g. 9, Kaunas LT-44307, Lithuania
| | | | - Bertina Dragūnaitė
- Lithuanian University of Health Sciences, A. Mickevičiaus g. 9, Kaunas LT-44307, Lithuania
| | | | | | - Vilma Petrikaitė
- Lithuanian University of Health Sciences, A. Mickevičiaus g. 9, Kaunas LT-44307, Lithuania; Life Sciences Center of Vilnius University, Saulėtekio al. 7, LT-10257 Vilnius, Lithuania
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Schrey H, Müller FJ, Harz P, Rupcic Z, Stadler M, Spiteller P. Nematicidal anthranilic acid derivatives from Laccaria species. PHYTOCHEMISTRY 2019; 160:85-91. [PMID: 30802801 DOI: 10.1016/j.phytochem.2019.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 01/11/2019] [Accepted: 01/13/2019] [Indexed: 06/09/2023]
Abstract
Three undescribed natural products, the anthranilic acid derivatives laccanthrilic acids A, B, and C, as well as the known (3S)-1,2,3,4-tetrahydro-3-β-carboline-3-carboxylic acid were isolated from fruiting bodies of Laccaria laccata. The structures were established by 1D and 2D NMR spectroscopy, HR-(+)-ESIMS and chemical synthesis. The absolute configuration of laccanthrilic acids A and B was determined by GC-MS after hydrolytic cleavage and derivatisation of the resulting glutamic acid with methanol and Mosher's reagent and subsequent comparison with authentic synthetic samples of known absolute configuration. The absolute configuration of laccanthrilic acid C was determined by comparison of the CD spectra of laccanthrilic acids B and C with each other. Metabolic profiling of related species showed that the compounds are common in the genus Laccaria. Laccanthrilic acid B exhibited moderate nematicidal effects against Caenorhabditis elegans, which might explain to some degree the beneficial role of these fungi for the growth and survival of their host plants.
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Affiliation(s)
- Hedda Schrey
- Institute for Organic and Analytical Chemistry, University of Bremen, Leobener Straße 7, 28359, Bremen, Germany
| | - Freya Janina Müller
- Institute for Organic and Analytical Chemistry, University of Bremen, Leobener Straße 7, 28359, Bremen, Germany
| | - Philipp Harz
- Institute for Organic and Analytical Chemistry, University of Bremen, Leobener Straße 7, 28359, Bremen, Germany
| | - Zeljka Rupcic
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Marc Stadler
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Peter Spiteller
- Institute for Organic and Analytical Chemistry, University of Bremen, Leobener Straße 7, 28359, Bremen, Germany.
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Kim GH, Jeon H, Khobragade TP, Patil MD, Sung S, Yoon S, Won Y, Choi IS, Yun H. Enzymatic synthesis of sitagliptin intermediate using a novel ω-transaminase. Enzyme Microb Technol 2019; 120:52-60. [DOI: 10.1016/j.enzmictec.2018.10.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 09/17/2018] [Accepted: 10/05/2018] [Indexed: 01/10/2023]
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Fernández-Sánchez L, Fernández-Salas JA, Maestro MC, García Ruano JL. Reformatsky Reaction to Alkynyl N-tert-Butanesulfinyl Imines: Lewis Acid Controlled Stereodivergent Synthesis of β-Alkynyl-β-Amino Acids. J Org Chem 2018; 83:12903-12910. [DOI: 10.1021/acs.joc.8b01918] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Luis Fernández-Sánchez
- Departamento de Química Orgánica (módulo-1), Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - José A. Fernández-Salas
- Departamento de Química Orgánica (módulo-1), Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - M. Carmen Maestro
- Departamento de Química Orgánica (módulo-1), Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - Jose L. García Ruano
- Departamento de Química Orgánica (módulo-1), Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
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Harrower E, Bougher NL, Winterbottom C, Henkel TW, Horak E, Matheny PB. New species in Cortinarius section Cortinarius (Agaricales) from the Americas and Australasia. MycoKeys 2015. [DOI: 10.3897/mycokeys.11.5409] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Zhao W, Lu Z, Wulff WD. β-amino esters from the reductive ring opening of aziridine-2-carboxylates. J Org Chem 2014; 79:10068-80. [PMID: 25329528 PMCID: PMC4227569 DOI: 10.1021/jo501694h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Indexed: 11/30/2022]
Abstract
A general study is undertaken to examine the scope of the reductive ring opening of aziridine-2-carboxylates with samarium diiodide. The competition between C-C and C-N bond cleavage is examined as a function of the nature of the N-substituent of the aziridine, the nature of the substituent in the 3-position of the aziridine, and whether the substituent in the 3-position is in a cis or trans relationship with the carboxylate in the 2-position. The desired C-N bond cleavage leads to β-amino esters that are the predominant products for most aziridines with an N-activating group. However, C-C cleavage products are observed with an aryl group in the 3-position; this can be particularly pronounced with cis-aziridines where a nearly equal mixture of the two is observed. Exclusive formation of the C-N cleavage product is observed for all aziridines with the strongly N-activating p-toluene sulfonate group. Similarly high selectivity is observed for the 2-trimethylsilylethyl sulfonate group (SES), which is easier to remove. The utility of these methods is illustrated in the synthesis of protected forms of (R)-β(3)-DOPA and L-DOPA from the same aziridine, the former by SmI2-mediated reductive opening at C-2 and the latter by palladium-mediated reductive opening at C-3.
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Affiliation(s)
- Wenjun Zhao
- Department of Chemistry, Michigan
State University, East Lansing, Michigan 48824, United States
| | - Zhenjie Lu
- Department of Chemistry, Michigan
State University, East Lansing, Michigan 48824, United States
| | - William D. Wulff
- Department of Chemistry, Michigan
State University, East Lansing, Michigan 48824, United States
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Fei H, Shin J, Meng YS, Adelhardt M, Sutter J, Meyer K, Cohen SM. Reusable oxidation catalysis using metal-monocatecholato species in a robust metal-organic framework. J Am Chem Soc 2014; 136:4965-73. [PMID: 24597832 DOI: 10.1021/ja411627z] [Citation(s) in RCA: 192] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An isolated metal-monocatecholato moiety has been achieved in a highly robust metal-organic framework (MOF) by two fundamentally different postsynthetic strategies: postsynthetic deprotection (PSD) and postsynthetic exchange (PSE). Compared with PSD, PSE proved to be a more facile and efficient functionalization approach to access MOFs that could not be directly synthesized under solvothermal conditions. Metalation of the catechol functionality residing in the MOFs resulted in unprecedented Fe-monocatecholato and Cr-monocatecholato species, which were characterized by X-ray absorption spectroscopy, X-band electron paramagnetic resonance spectroscopy, and (57)Fe Mössbauer spectroscopy. The resulting materials are among the first examples of Zr(IV)-based UiO MOFs (UiO = University of Oslo) with coordinatively unsaturated active metal centers. Importantly, the Cr-metalated MOFs are active and efficient catalysts for the oxidation of alcohols to ketones using a wide range of substrates. Catalysis could be achieved with very low metal loadings (0.5-1 mol %). Unlike zeolite-supported, Cr-exchange oxidation catalysts, the MOF-based catalysts reported here are completely recyclable and reusable, which may make them attractive catalysts for 'green' chemistry processes.
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Affiliation(s)
- Honghan Fei
- Department of Chemistry and Biochemistry and ‡Department of NanoEngineering, University of California, San Diego , La Jolla, California 92093, United States
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Jaeger RJR, Lamshöft M, Gottfried S, Spiteller M, Spiteller P. HR-MALDI-MS imaging assisted screening of β-carboline alkaloids discovered from Mycena metata. JOURNAL OF NATURAL PRODUCTS 2013; 76:127-134. [PMID: 23330951 DOI: 10.1021/np300455a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Fruiting bodies of Mycena metata were screened for the presence of new secondary metabolites by means of HPLC-UV, LC-HR-ESIMS, and high-resolution matrix-assisted laser desorption/ionization mass spectrometry imaging (HR-MALDI-MS imaging). Thus, a new β-carboline alkaloid, 6-hydroxymetatacarboline D (1d), was isolated from fruiting bodies of M. metata. 6-Hydroxymetatacarboline D consists of a highly substituted β-carboline skeleton, which is likely to be derived biosynthetically from l-tryptophan, 2-oxoglutaric acid, l-threonine, and l-proline. The structure of the alkaloid was established by 2D NMR spectroscopic methods and HR-ESIMS. Moreover, by extensive application of LC-HR-ESIMS, LC-HR-ESIMS/MS, and LC-HR-ESIMS(3) techniques we were able to elucidate the structures of a number of accompanying β-carboline alkaloids, 1a-1c, 1e-1i, and 2a-2g, structurally closely related to 6-hydroxymetatacarboline D, which are present in M. metata in minor amounts. The absolute configuration of the stereogenic centers of the β-carboline alkaloids was determined by GC-MS comparison with authentic synthetic samples after hydrolytic cleavage and derivatization of the resulting amino acids.
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Affiliation(s)
- Robert J R Jaeger
- Institut für Organische und Analytische Chemie, Universität Bremen, Leobener Straße NW2C, Bremen, Germany
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Yuen AKL, Hutton GA, Masters AF, Maschmeyer T. The interplay of catechol ligands with nanoparticulate iron oxides. Dalton Trans 2012; 41:2545-59. [DOI: 10.1039/c2dt11864e] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Jaeger RJR, Spiteller P. Mycenaaurin A, an antibacterial polyene pigment from the fruiting bodies of Mycena aurantiomarginata. JOURNAL OF NATURAL PRODUCTS 2010; 73:1350-1354. [PMID: 20617819 DOI: 10.1021/np100155z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A new polyene pigment, mycenaaurin A (1), was isolated from fruiting bodies of Mycena aurantiomarginata. Mycenaaurin A consists of a tridecaketide that is flanked by two amino acid moieties. These are likely to be derived biosynthetically from S-adenosylmethionine. The tridecaketide itself contains an alpha-pyrone, a conjugated hexaene, and an isolated alkenyl moiety. The structure of the new pigment was established by 2D NMR spectroscopic methods and APCIMS. The absolute configuration of the four stereogenic centers was determined by degradation of 1 by ozonolysis and GC-MS comparison of the resulting fragments, after appropriate derivatization, with authentic synthetic samples. Mycenaaurin A (1) might act as a constitutive defense compound, since it exhibits antibacterial activity against the gram-positive bacterium Bacillus pumilus.
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Affiliation(s)
- Robert J R Jaeger
- Institut für Organische Chemie und Biochemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany
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TiCl4 promoted menthyl ester chiral auxiliary mediated synthesis of chiral syn-β-amino esters and applications of a representative syn-β-amino ester. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.02.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Nishimura T, Wang J, Nagaosa M, Okamoto K, Shintani R, Kwong FY, Yu WY, Chan ASC, Hayashi T. Rhodium-Catalyzed Asymmetric Addition of Arylboronic Acids to β-Phthaliminoacrylate Esters toward the Synthesis of β-Amino Acids. J Am Chem Soc 2009; 132:464-5. [DOI: 10.1021/ja909642h] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takahiro Nishimura
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
| | - Jun Wang
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
| | - Makoto Nagaosa
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
| | - Kazuhiro Okamoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
| | - Ryo Shintani
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
| | - Fuk-yee Kwong
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
| | - Wing-yiu Yu
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
| | - Albert S. C. Chan
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
| | - Tamio Hayashi
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan, and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong
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Teichert A, Schmidt J, Porzel A, Arnold N, Wessjohann L. N-Glucosyl-1H-indole Derivatives fromCortinarius brunneus (Basidiomycetes). Chem Biodivers 2008; 5:664-9. [DOI: 10.1002/cbdv.200890062] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kondoh A, Yorimitsu H, Oshima K. Copper-Catalyzed anti-Hydrophosphination Reaction of 1-Alkynylphosphines with Diphenylphosphine Providing (Z)-1,2-Diphosphino-1-alkenes. J Am Chem Soc 2007; 129:4099-104. [PMID: 17355137 DOI: 10.1021/ja070048d] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydrophosphination of 1-alkynylphosphines with diphenylphosphine proceeds in an anti fashion under copper catalysis, providing an easy and efficient access to a variety of (Z)-1,2-diphosphino-1-alkenes and their sulfides. The reaction is highly chemoselective and can be performed even in an aqueous medium. The reaction is reliable enough to realize a gram-scale synthesis of (Z)-1,2-diphosphino-1-alkene. Radical reduction of the diphosphine disulfides with tris(trimethylsilyl)silane yields the parent trivalent diphosphines without suffering from the isomerization of the olefinic geometry. Enantioselective hydrogenation of (Z)-3,3-dimethyl-1,2-bis(diphenylthiophosphinyl)-1-butene followed by desulfidation leads to a new chiral bidentate phosphine ligand.
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Affiliation(s)
- Azusa Kondoh
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto-daigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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P. Mahajan M, Anand A, Bhargava G, Singh Hundal M. A Facile Sodium Alkoxide Mediated Ring Opening of Unactivated a-Dienyl-b-lactams: Synthesis of Unnatural Multicomponent b-Aminodienoic Esters. HETEROCYCLES 2007. [DOI: 10.3987/com-07-s(u)48] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Davies SG, Garrido NM, Kruchinin D, Ichihara O, Kotchie LJ, Price PD, Mortimer AJP, Russell AJ, Smith AD. Homochiral lithium amides for the asymmetric synthesis of β-amino acids. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.05.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Garnica S, Weiß M, Oertel B, Oberwinkler F. A framework for a phylogenetic classification in the genus Cortinarius (Basidiomycota, Agaricales) derived from morphological and molecular data. ACTA ACUST UNITED AC 2005. [DOI: 10.1139/b05-107] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Phylogenetic relationships in the genus Cortinarius with emphasis on European species were studied by integrating a molecular phylogenetic analysis of nuclear rDNA sequences with morphological, chemical, and ecological data. Internal transcribed spacers (ITS1 and ITS2, including 5.8S) and the D1–D2 regions of nuclear rDNA of 262 Cortinarius species including most of the recognised subgenera from Europe, South America, Australia, Tasmania, New Zealand, and Asia were sequenced and analysed by maximum likelihood and neighbour joining. Our morphological and molecular analyses showed considerable disagreement with earlier morphology-based hypotheses concerning the infrageneric delimitations in Cortinarius. We propose a new base for a more natural classification system in Cortinarius involving the taxonomic rearrangement of the species into the following major lineages that we informally designate as “clades” at this time: (1) phlegmacioid species are included in Alluti, Amarescentes, Arguti, Calochroi, Caerulescentes, Percomes, Phlegmacioides, Phlegmacium, Purpurascentes, Scauri, and Vulpini; (2) the Heterocliti clade includes species of the subgenera Leprocybe and Cystogenes ; (3) most of the Myxacium species are included in the Delibuti and Myxacium clades; (4) part of Rozites are included in the Rozites clade; (5) the north-hemispheric species of subgenus Dermocybe are included in the Dermocybe clade and part of the south-hemispheric species in the Splendidi clade; (6) part of Sericeocybe are integrated in the Anomali and Telamonia clades; (7) members of subgenus Cortinarius are assigned to the Cortinarius clade; (8) telamonioid taxa are included in the Obtusi, Renidentes, and Telamonia clades. Several Cortinarius species with peculiar patterns of morphology and basidiome coloration had isolated positions in the sequence analysis, and the evolutionary relationships among the major lineages remained unresolved. Our results suggest the convergent evolution of certain morphological traits across phylogenetically divergent lineages in Cortinarius. However, combinations of features such as pileipellis anatomy, spore shape, veil coloration, basidiome pigments, and stipe shape appear useful to circumscribe clades. Our molecular phylogenetic analysis allows insights in global geographical patterns of species distribution within the major lineages in the genus Cortinarius. The clade structure proposed here could be used as backbone for further more detailed systematic studies.
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Affiliation(s)
- Sigisfredo Garnica
- Lehrstuhl für Spezielle Botanik und Mykologie, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076 Tübingen, Germany
- Institut für Gartenbauwissenschaft, Universität Bonn, Auf dem Hügel 6, D-53121 Bonn, Germany
| | - Michael Weiß
- Lehrstuhl für Spezielle Botanik und Mykologie, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076 Tübingen, Germany
- Institut für Gartenbauwissenschaft, Universität Bonn, Auf dem Hügel 6, D-53121 Bonn, Germany
| | - Bernhard Oertel
- Lehrstuhl für Spezielle Botanik und Mykologie, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076 Tübingen, Germany
- Institut für Gartenbauwissenschaft, Universität Bonn, Auf dem Hügel 6, D-53121 Bonn, Germany
| | - Franz Oberwinkler
- Lehrstuhl für Spezielle Botanik und Mykologie, Botanisches Institut, Universität Tübingen, Auf der Morgenstelle 1, D-72076 Tübingen, Germany
- Institut für Gartenbauwissenschaft, Universität Bonn, Auf dem Hügel 6, D-53121 Bonn, Germany
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Avila-Ortiz CG, Reyes-Rangel G, Juaristi E. Preparation of both enantiomers of β2-(3,4-dihydroxybenzyl)-β-alanine, higher homologues of Dopa. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.06.094] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Affiliation(s)
- Ji-Kai Liu
- Kunming Institute of Botany, the Chinese Academy of Sciences, Kunming 650204, P. R. China.
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Synthesis of terminally protected (S)-β3-H-DOPA by Arndt–Eistert homologation: an approach to crowned β-peptides. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2004.11.089] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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N-Benzylhydroxylamine addition to beta-aryl enoates. Enantioselective synthesis of beta-aryl-beta-amino acid precursors. Org Lett 2000; 2:3393-6. [PMID: 11029219 DOI: 10.1021/ol006500e] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chiral Lewis acid catalyzed N-benzylhydroxylamine addition to pyrrolidinone-derived enoates afforded beta-aryl-beta-amino acid derivatives in high enantiomeric purity with moderate to very good chemical efficiency.
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