1
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Gryko D, Szumna A, Aav R, Soós T. ChemEASTry Europe, the Status of the Chemical Sciences in a Growing Region. Org Lett 2023; 25:6237-6239. [PMID: 37654249 DOI: 10.1021/acs.orglett.3c02621] [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: 09/02/2023]
Affiliation(s)
- Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Agnieszka Szumna
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Riina Aav
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Akadeemia tee 15, SCI-421A, 12618 Tallinn, Harju Maakon, Estonia
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, H-1117 Budapest, Hungary
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2
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Gryko D, Szumna A, Aav R, Soós T. ChemEASTry Europe, the Status of the Chemical Sciences in a Growing Region. J Org Chem 2023; 88:12165-12167. [PMID: 37655397 DOI: 10.1021/acs.joc.3c01805] [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: 09/02/2023]
Affiliation(s)
- Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Agnieszka Szumna
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Riina Aav
- Department of Chemistry and Biotechnology, School of Science, Tallinn University of Technology, Akadeemia tee 15, SCI-421A, 12618 Tallinn, Harju Maakon, Estonia
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, H-1117 Budapest, Hungary
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3
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Angyal P, Hegedüs K, Mészáros BB, Daru J, Dudás Á, Galambos AR, Essmat N, Al-Khrasani M, Varga S, Soós T. Total Synthesis and Structural Plasticity of Kratom Pseudoindoxyl Metabolites. Angew Chem Int Ed Engl 2023; 62:e202303700. [PMID: 37332089 DOI: 10.1002/anie.202303700] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 06/13/2023] [Accepted: 06/15/2023] [Indexed: 06/20/2023]
Abstract
Mitragynine pseudoindoxyl, a kratom metabolite, has attracted increasing attention due to its favorable side effect profile as compared to conventional opioids. Herein, we describe the first enantioselective and scalable total synthesis of this natural product and its epimeric congener, speciogynine pseudoindoxyl. The characteristic spiro-5-5-6-tricyclic system of these alkaloids was formed through a protecting-group-free cascade relay process in which oxidized tryptamine and secologanin analogues were used. Furthermore, we discovered that mitragynine pseudoindoxyl acts not as a single molecular entity but as a dynamic ensemble of stereoisomers in protic environments; thus, it exhibits structural plasticity in biological systems. Accordingly, these synthetic, structural, and biological studies provide a basis for the planned design of mitragynine pseudoindoxyl analogues, which can guide the development of next-generation analgesics.
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Affiliation(s)
- Péter Angyal
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
- Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117, Budapest, Hungary
| | - Kristóf Hegedüs
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
- Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117, Budapest, Hungary
| | - Bence Balázs Mészáros
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - János Daru
- Department of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117, Budapest, Hungary
| | - Ádám Dudás
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
- Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117, Budapest, Hungary
| | - Anna Rita Galambos
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Nagyvárad tér 4, 1089, Budapest, Hungary
| | - Nariman Essmat
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Nagyvárad tér 4, 1089, Budapest, Hungary
| | - Mahmoud Al-Khrasani
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Nagyvárad tér 4, 1089, Budapest, Hungary
| | - Szilárd Varga
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
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4
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Sztanó G, Dobi Z, Soós T. Strain and Complexity, Passerini and Ugi Reactions of Four-Membered Heterocycles and Further Elaboration of TOSMIC Product. ChemistryOpen 2023; 12:e202200083. [PMID: 37548280 PMCID: PMC10405247 DOI: 10.1002/open.202200083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 06/21/2023] [Indexed: 08/08/2023] Open
Abstract
Straightforward and general Passerini and Ugi procedures have been developed to incorporate four-membered heterocycles into highly functionalized scaffolds. Additionally, toslymethyl isocyanide (TosMIC)-derived Ugi adducts have been prepared, showcasing the prospect of the multicomponent reaction.
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Affiliation(s)
- Gábor Sztanó
- Institute of Organic ChemistryResearch Centre for Natural SciencesBudapest1519Hungary
- Hevesy György PhD School of ChemistryELTE Eötvös Loránd UniversityBudapest1117Pázmány Péter sétány 1/AHungary
| | - Zoltán Dobi
- Institute of Organic ChemistryResearch Centre for Natural SciencesBudapest1519Hungary
| | - Tibor Soós
- Institute of Organic ChemistryResearch Centre for Natural SciencesBudapest1519Hungary
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5
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Kőnig B, Sztanó G, Holczbauer T, Soós T. Syntheses of 2- and 3-Substituted Morpholine Congeners via Ring Opening of 2-Tosyl-1,2-Oxazetidine. J Org Chem 2023; 88:6182-6191. [PMID: 37125664 PMCID: PMC10167689 DOI: 10.1021/acs.joc.3c00207] [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: 05/02/2023]
Abstract
Diastereoselective and diastereoconvergent syntheses of 2- and 3-substituted morpholine congeners are reported. Starting from tosyl-oxazatedine 1 and α-formyl carboxylates 2, base catalysis is utilized to yield morpholine hemiaminals. Their further synthetic elaborations allowed the concise constructions of conformationally rigid morpholines. The observed diastereoselectivities and the unusual diastereoconvergence in the photoredox radical processes seem to be the direct consequence of the avoidance of pseudo A1,3 strain between the C-3 substituent and the N-tosyl group and the anomeric effect of oxygen atoms.
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Affiliation(s)
- Bálint Kőnig
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, H-1117 Budapest, Hungary
- Hevesy György PhD School of Chemistry, Eötvös Loránd University, 1/A Pázmány Péter sétány, H-1117 Budapest, Hungary
| | - Gábor Sztanó
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, H-1117 Budapest, Hungary
- Hevesy György PhD School of Chemistry, Eötvös Loránd University, 1/A Pázmány Péter sétány, H-1117 Budapest, Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, H-1117 Budapest, Hungary
- Centre for Structural Science, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, H-1117 Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, H-1117 Budapest, Hungary
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6
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Albitz K, Csókás D, Dobi Z, Pápai I, Soós T. Late-Stage Formal Double C-H Oxidation of Prenylated Molecules to Alkylidene Oxetanes and Azetidines by Strain-Enabled Cross-Metathesis. Angew Chem Int Ed Engl 2023; 62:e202216879. [PMID: 36629402 DOI: 10.1002/anie.202216879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 01/12/2023]
Abstract
Prenylation is a ubiquitous late-stage modification in nature that often confers significantly improved bioactivity for secondary metabolites. While this lipophilic modification renders enhanced potency, the lipophilic tag(s) can diminish bioavailability and adversely alter drug transportation and metabolism. Thus, a functional-group-tolerant, mild, and selective late-stage C-H functionalization of prenyl tags would present a great potential in drug discovery programs but could also impact other fields, such as agrochemistry and chemical biology. Herein we report an exocyclic-strain-driven cross-metathesis reaction of prenyl tags, a formal double C-H oxidation protocol, that can be used for the selective late-stage derivatization of prenylated compounds and natural products. This methodology avoids the need for prefunctionalization of target molecules and affords ready access to an unprecedented library of oxo- and aza-prenylated complex molecules. Thus, in a broader context, this methodology extends late-stage functionalization beyond that available to nature.
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Affiliation(s)
- Krisztián Albitz
- Organocatalysis Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, 1117, Budapest, Hungary.,Hevesy György PhD School of Chemistry, Eötvös Loránd University, 1/A Pázmány Péter sétány, 1117, Budapest, Hungary
| | - Dániel Csókás
- Theoretical Chemistry Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, 1117, Budapest, Hungary
| | - Zoltán Dobi
- Organocatalysis Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, 1117, Budapest, Hungary
| | - Imre Pápai
- Theoretical Chemistry Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, 1117, Budapest, Hungary
| | - Tibor Soós
- Organocatalysis Research Group, Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok körútja, 1117, Budapest, Hungary
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7
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Albitz K, Csókás D, Dobi Z, Pápai I, Soós T. Late‐Stage Formal Double C–H Oxidation of Prenylated Molecules to Alkylidene Oxetanes and Azetidines by Strain‐Enabled Cross‐Metathesis. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202216879] [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: 01/13/2023]
Affiliation(s)
- Krisztián Albitz
- HAS RCNS: Termeszettudomanyi Kutatokozpont Institute of Organic Chemistry HUNGARY
| | - Dániel Csókás
- HAS RCNS: Termeszettudomanyi Kutatokozpont Institute of Organic Chemistry HUNGARY
| | - Zoltán Dobi
- HAS RCNS: Termeszettudomanyi Kutatokozpont Institute of Organic Chemistry HUNGARY
| | - Imre Pápai
- HAS RCNS: Termeszettudomanyi Kutatokozpont Institute of Organic Chemistry HUNGARY
| | - Tibor Soós
- Research Centre for Natural Sciences: Termeszettudomanyi Kutatokozpont Institute of Organic Chemistry 2 Magyar tudósok körútja 1117 Budapest HUNGARY
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8
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Angyal P, Kotschy AM, Dudás Á, Varga S, Soós T. Intertwining Olefin Thianthrenation with Kornblum/Ganem Oxidations: Ene-type Oxidation to Furnish α,β-Unsaturated Carbonyls. Angew Chem Int Ed Engl 2023; 62:e202214096. [PMID: 36408745 PMCID: PMC10108043 DOI: 10.1002/anie.202214096] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Indexed: 11/22/2022]
Abstract
A widely applicable, practical, and scalable synthetic method for efficient ene-type double oxidation of alkenes is reported via a two-step alkenyl thianthrenium umpolung/Kornblum-Ganem oxidation strategy. This chemo- and stereoselective procedure allows easy access to various α,β-unsaturated carbonyls that may be otherwise difficult or cumbersome to synthesize by conventional methods. For α-olefins, this metal-free transformation can be tuned according to synthetic needs to produce either the elusive (Z)-unsaturated aldehydes or their (E) counterparts. Moreover, this strategy has enabled streamlined synthesis of distinct butadienyl pheromones and kairomones.
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Affiliation(s)
- Péter Angyal
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary.,Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117, Budapest, Hungary
| | - András M Kotschy
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary.,Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117, Budapest, Hungary
| | - Ádám Dudás
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary.,Hevesy György PhD School of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117, Budapest, Hungary
| | - Szilárd Varga
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
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9
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Angyal P, Kotschy AM, Dudás Á, Varga S, Soós T. Intertwining Olefin Thianthrenation with Kornblum/Ganem Oxidations: Ene‐type Oxidation to Furnish α,β‐Unsaturated Carbonyls. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202214096] [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: 11/22/2022]
Affiliation(s)
- Péter Angyal
- Research Centre for Natural Sciences: Termeszettudomanyi Kutatokozpont Institute of Organic Chemistry HUNGARY
| | - András M. Kotschy
- Research Centre for Natural Sciences: Termeszettudomanyi Kutatokozpont Institute of Organic Chemistry HUNGARY
| | - Ádám Dudás
- Research Centre for Natural Sciences: Termeszettudomanyi Kutatokozpont Institute of Organic Chemistry HUNGARY
| | - Szilárd Varga
- Research Centre for Natural Sciences: Termeszettudomanyi Kutatokozpont Institute of Organic Chemistry HUNGARY
| | - Tibor Soós
- Research Centre for Natural Sciences: Termeszettudomanyi Kutatokozpont Institute of Organic Chemistry 2 Magyar tudósok körútja 1117 Budapest HUNGARY
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10
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Pape VFS, Palkó R, Tóth S, Szabó MJ, Sessler J, Dormán G, Enyedy ÉA, Soós T, Szatmári I, Szakács G. Structure-Activity Relationships of 8-Hydroxyquinoline-Derived Mannich Bases with Tertiary Amines Targeting Multidrug-Resistant Cancer. J Med Chem 2022; 65:7729-7745. [PMID: 35613553 PMCID: PMC9189845 DOI: 10.1021/acs.jmedchem.2c00076] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
![]()
A recently proposed
strategy to overcome multidrug resistance (MDR)
in cancer is to target the collateral sensitivity of otherwise resistant
cells. We designed a library of 120 compounds to explore the chemical
space around previously identified 8-hydroxyquinoline-derived Mannich
bases with robust MDR-selective toxicity. We included compounds to
study the effect of halogen and alkoxymethyl substitutions in R5 in
combination with different Mannich bases in R7, a shift of the Mannich
base from R7 to R5, as well as the introduction of an aromatic moiety.
Cytotoxicity tests performed on a panel of parental and MDR cells
highlight a strong influence of experimentally determined pKa values of the donor atom moieties, indicating
that protonation and metal chelation are important factors modulating
the MDR-selective anticancer activity of the studied compounds. Our
results identify structural requirements increasing MDR-selective
anticancer activity, providing guidelines for the development of more
effective anticancer chelators targeting MDR cancer.
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Affiliation(s)
- Veronika F S Pape
- Institute of Enzymology, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok körútja 2, H-1117 Budapest, Hungary.,Department of Physiology, Semmelweis University, Faculty of Medicine, Tűzoltó utca 37-47, H-1094 Budapest, Hungary
| | - Roberta Palkó
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok körútja 2, H-1117 Budapest, Hungary
| | - Szilárd Tóth
- Institute of Enzymology, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok körútja 2, H-1117 Budapest, Hungary
| | | | - Judit Sessler
- Institute of Enzymology, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok körútja 2, H-1117 Budapest, Hungary
| | - György Dormán
- TargetEx Ltd., Madách Imre u 31/2., H-2120 Dunakeszi, Hungary
| | - Éva A Enyedy
- Department of Inorganic and Analytical Chemistry, MTA-SZTE Lendület Functional Metal Complexes Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok körútja 2, H-1117 Budapest, Hungary
| | - István Szatmári
- Institute of Pharmaceutical Chemistry and Stereochemistry Research Group of Hungarian Academy of Sciences, University of Szeged, Eötvös u. 6, H-6720 Szeged, Hungary
| | - Gergely Szakács
- Institute of Enzymology, Research Centre for Natural Sciences, Eötvös Loránd Research Network, Magyar Tudósok körútja 2, H-1117 Budapest, Hungary.,Institute of Cancer Research, Medical University of Vienna, Borschkegasse 8a, A-1090 Vienna, Austria
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11
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Martin G, Angyal P, Egyed O, Varga S, Soós T. Total Syntheses of Dihydroindole Aspidosperma Alkaloids: Reductive Interrupted Fischer Indolization Followed by Redox Diversification. Org Lett 2020; 22:4675-4679. [PMID: 32497431 PMCID: PMC7467818 DOI: 10.1021/acs.orglett.0c01472] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Indexed: 01/22/2023]
Abstract
We report a novel reductive interrupted Fischer indolization process for the concise assembly of the 20-oxoaspidospermidine framework. This rapid complexity generating route paves the way toward various dihydroindole Aspidosperma alkaloids with different C-5 side chain redox patterns. The end-game redox modulations were accomplished by modified Wolff-Kishner reaction and photo-Wolff rearrangement, enabling the total synthesis of (-)-aspidospermidine, (-)-limaspermidine, and (+)-17-demethoxy-N-acetylcylindrocarine and the formal total synthesis of (-)-1-acetylaspidoalbidine.
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Affiliation(s)
- Gábor Martin
- Institute
of Organic Chemistry, Research Centre for
Natural Sciences, 2 Magyar tudósok krt., Budapest, H-1117, Hungary
| | - Péter Angyal
- Institute
of Organic Chemistry, Research Centre for
Natural Sciences, 2 Magyar tudósok krt., Budapest, H-1117, Hungary
| | - Orsolya Egyed
- Instrumentation
Center, Research Centre for Natural Sciences, 2 Magyar tudósok krt., Budapest, H-1117, Hungary
| | - Szilárd Varga
- Institute
of Organic Chemistry, Research Centre for
Natural Sciences, 2 Magyar tudósok krt., Budapest, H-1117, Hungary
| | - Tibor Soós
- Institute
of Organic Chemistry, Research Centre for
Natural Sciences, 2 Magyar tudósok krt., Budapest, H-1117, Hungary
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12
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Varga S, Angyal P, Martin G, Egyed O, Holczbauer T, Soós T. Total Syntheses of (−)‐Minovincine and (−)‐Aspidofractinine through a Sequence of Cascade Reactions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004769] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Szilárd Varga
- Institute of Organic Chemistry Research Centre for Natural Sciences 2 Magyar tudósok krt. 1117 Budapest Hungary
| | - Péter Angyal
- Institute of Organic Chemistry Research Centre for Natural Sciences 2 Magyar tudósok krt. 1117 Budapest Hungary
| | - Gábor Martin
- Institute of Organic Chemistry Research Centre for Natural Sciences 2 Magyar tudósok krt. 1117 Budapest Hungary
| | - Orsolya Egyed
- Instrumentation Center Research Centre for Natural Sciences 2 Magyar tudósok krt. 1117 Budapest Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry Research Centre for Natural Sciences 2 Magyar tudósok krt. 1117 Budapest Hungary
- Instrumentation Center Research Centre for Natural Sciences 2 Magyar tudósok krt. 1117 Budapest Hungary
| | - Tibor Soós
- Institute of Organic Chemistry Research Centre for Natural Sciences 2 Magyar tudósok krt. 1117 Budapest Hungary
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13
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Varga S, Angyal P, Martin G, Egyed O, Holczbauer T, Soós T. Total Syntheses of (-)-Minovincine and (-)-Aspidofractinine through a Sequence of Cascade Reactions. Angew Chem Int Ed Engl 2020; 59:13547-13551. [PMID: 32351014 PMCID: PMC7497198 DOI: 10.1002/anie.202004769] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 04/27/2020] [Indexed: 12/31/2022]
Abstract
We report 8‐step syntheses of (−)‐minovincine and (−)‐aspidofractinine using easily available and inexpensive reagents and catalyst. A key element of the strategy was the utilization of a sequence of cascade reactions to rapidly construct the penta‐ and hexacyclic frameworks. These cascade transformations included organocatalytic Michael‐aldol condensation, a multistep anionic Michael‐SN2 cascade reaction, and Mannich reaction interrupted Fischer indolization. To streamline the synthetic routes, we also investigated the deliberate use of steric effect to secure various chemo‐ and regioselective transformations.
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Affiliation(s)
- Szilárd Varga
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok krt., 1117, Budapest, Hungary
| | - Péter Angyal
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok krt., 1117, Budapest, Hungary
| | - Gábor Martin
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok krt., 1117, Budapest, Hungary
| | - Orsolya Egyed
- Instrumentation Center, Research Centre for Natural Sciences, 2 Magyar tudósok krt., 1117, Budapest, Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok krt., 1117, Budapest, Hungary.,Instrumentation Center, Research Centre for Natural Sciences, 2 Magyar tudósok krt., 1117, Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre for Natural Sciences, 2 Magyar tudósok krt., 1117, Budapest, Hungary
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14
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Bombicz P, Bereczki L, May NV, Palkó R, Horváth DV, Soós T, Holczbauer T. Structural features of the formation of iHOF materials. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s0108767319096715] [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: 11/10/2022] Open
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15
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Fegyverneki D, Kolozsvári N, Molnár D, Egyed O, Holczbauer T, Soós T. Size-Exclusion Borane-Catalyzed Domino 1,3-Allylic/Reductive Ireland-Claisen Rearrangements: Impact of the Electronic and Structural Parameters on the 1,3-Allylic Shift Aptitude. Chemistry 2019. [DOI: 10.1002/chem.201900161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dániel Fegyverneki
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
| | - Natália Kolozsvári
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
| | - Dániel Molnár
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
| | - Orsolya Egyed
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
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Fegyverneki D, Kolozsvári N, Molnár D, Egyed O, Holczbauer T, Soós T. Size-Exclusion Borane-Catalyzed Domino 1,3-Allylic/Reductive Ireland-Claisen Rearrangements: Impact of the Electronic and Structural Parameters on the 1,3-Allylic Shift Aptitude. Chemistry 2019; 25:2179-2183. [PMID: 30466176 DOI: 10.1002/chem.201805208] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/12/2018] [Indexed: 01/09/2023]
Abstract
The reductive Ireland-Claisen rearrangement through borane-mediated hydrosilylation is reported. The method employs a borane catalyst with a special structural design and affords access to synthetically relevant products with high diastereoselectivity. Depending on electronic and structural parameters, the reaction can be coupled with a 1,3-allylic shift, thus the valence isomer of the Ireland-Claisen product is formed.
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Affiliation(s)
- Dániel Fegyverneki
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences, 2 Magyar tudósok krt., Budapest, 1117, Hungary
| | - Natália Kolozsvári
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences, 2 Magyar tudósok krt., Budapest, 1117, Hungary
| | - Dániel Molnár
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences, 2 Magyar tudósok krt., Budapest, 1117, Hungary
| | - Orsolya Egyed
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences, 2 Magyar tudósok krt., Budapest, 1117, Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences, 2 Magyar tudósok krt., Budapest, 1117, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences, 2 Magyar tudósok krt., Budapest, 1117, Hungary
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Fegyverneki D, Kolozsvári N, Molnár D, Egyed O, Holczbauer T, Soós T. Front Cover: Size-Exclusion Borane-Catalyzed Domino 1,3-Allylic/Reductive Ireland-Claisen Rearrangements: Impact of the Electronic and Structural Parameters on the 1,3-Allylic Shift Aptitude (Chem. Eur. J. 9/2019). Chemistry 2019. [DOI: 10.1002/chem.201900160] [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: 11/07/2022]
Affiliation(s)
- Dániel Fegyverneki
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
| | - Natália Kolozsvári
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
| | - Dániel Molnár
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
| | - Orsolya Egyed
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Research Centre of Natural Sciences; Hungarian Academy of Sciences; 2 Magyar tudósok krt. Budapest 1117 Hungary
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18
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Spránitz P, Sőregi P, Botlik B, Berta M, Soós T. Organocatalytic Desymmetrisation of Fittig’s Lactones: Deuterium as a Reporter Tag for Hidden Racemisation. SYNTHESIS-STUTTGART 2019. [DOI: 10.1055/s-0037-1611655] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Highly enantioselective desymmetrisation of Fittig’s lactones with alcohols is promoted by bifunctional cinchona squaramides. The reactions were carried out with monodeuterated methanol to detect possible hidden racemisation of the stereogenic centre. Current evidence suggests that racemisation was not a relevant process for most substrates; partial erosion of enantioselectivity was only detected with ortho-substituted aryl derivates. The resultant glutaric acid derivatives possess a scaffold that is common in natural products and the compounds are also useful chiral building blocks for further synthetic endeavours.
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Affiliation(s)
| | | | | | | | - Tibor Soós
- Institute of Organic Chemistry, Research Centre for Natural Sciences
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19
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Nagyné Bereczki L, Makó Z, Fegyverneki D, May NV, Soós T, Bombicz P. A systematic structural study of halogenated 2-phenylbenzimidazoles. Acta Crystallogr A Found Adv 2018. [DOI: 10.1107/s2053273318089891] [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: 11/10/2022] Open
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20
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Holczbauer T, Bereczki L, May NV, Horváth DV, Palkó R, Soós T, Bombicz P. Sponge-like structures assisted by hydrogen bonds. Acta Crystallogr A Found Adv 2018. [DOI: 10.1107/s2053273318090137] [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: 11/10/2022] Open
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21
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Soós T, Horváth D, Domonyi F, Palkó R, Lomoschitz A. Regioexhaustive Functionalization of the Carbocyclic Core of Isoquinoline: Concise Synthesis of Oxoaporphine Core and Ellipticine. SYNTHESIS-STUTTGART 2018. [DOI: 10.1055/s-0037-1609153] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
A general and versatile strategy has been developed for the functionalization of the carbocyclic core of the isoquinoline. This regioexhaustive approach employs electrophilic halogenation as a toolbox methodology and delivers highly decorated intermediates that can be further elaborated toward medicinally relevant building blocks or natural products.
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22
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Szigeti M, Dobi Z, Soós T. The Goldilocks Principle in Phase Labeling. Minimalist and Orthogonal Phase Tagging for Chromatography-Free Mitsunobu Reaction. J Org Chem 2018; 83:2869-2874. [PMID: 29378404 DOI: 10.1021/acs.joc.8b00014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An inexpensive and chromatography-free Mitsunobu methodology has been developed using low molecular weight and orthogonally phase-tagged reagents, a tert-butyl-tagged highly apolar phosphine, and a water-soluble DIAD analogue. The byproduct of the Mitsunobu reactions can be removed by sequential liquid-liquid extractions using traditional solvents such as hexanes, MeOH, water, and EtOAc. Owing to the orthogonal phase labeling, the spent reagents can be regenerated. This new variant of the Mitsunobu reaction promises to provide an alternative and complementary solution for the well-known separation problem of the Mitsunobu reaction without having to resort to expensive, large molecular weight reagents and chromatography.
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Affiliation(s)
- Mariann Szigeti
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences Magyar tudósok körútja 2, H-1117, Budapest, Hungary
| | - Zoltán Dobi
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences Magyar tudósok körútja 2, H-1117, Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre of Natural Sciences, Hungarian Academy of Sciences Magyar tudósok körútja 2, H-1117, Budapest, Hungary
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23
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Horváth DV, Holczbauer T, Bereczki L, Palkó R, May NV, Soós T, Bombicz P. Polymorphism of a porous hydrogen bond-assisted ionic organic framework. CrystEngComm 2018. [DOI: 10.1039/c8ce00041g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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
The polymorphs of a cationic iHOF constructed by anion⋯pi interactions and the role of molecular inflexibility in framework construction are presented.
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Affiliation(s)
- Dániel Vajk Horváth
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1117 Budapest
- Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1117 Budapest
- Hungary
| | - Laura Bereczki
- Chemical Crystallography Research Laboratory
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1117 Budapest
- Hungary
| | - Roberta Palkó
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1117 Budapest
- Hungary
| | - Nóra Veronika May
- Chemical Crystallography Research Laboratory
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1117 Budapest
- Hungary
| | - Tibor Soós
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1117 Budapest
- Hungary
| | - Petra Bombicz
- Chemical Crystallography Research Laboratory
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- 1117 Budapest
- Hungary
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24
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Dorkó É, Kótai B, Földes T, Gyömöre Á, Pápai I, Soós T. Correlating electronic and catalytic properties of frustrated Lewis pairs for imine hydrogenation. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.04.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Dorkó É, Szabó M, Kótai B, Pápai I, Domján A, Soós T. Expanding the Boundaries of Water-Tolerant Frustrated Lewis Pair Hydrogenation: Enhanced Back Strain in the Lewis Acid Enables the Reductive Amination of Carbonyls. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703591] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Éva Dorkó
- Institute of Organic Chemistry; Hungarian Academy of Sciences; Research Centre for Natural Sciences; Magyar tudósok körútja 2 1117 Budapest Hungary
| | - Márk Szabó
- NMR Research Laboratory of IC; Hungarian Academy of Sciences; Research Centre for Natural Sciences; Magyar tudósok körútja 2 1117 Budapest Hungary
| | - Bianka Kótai
- Institute of Organic Chemistry; Hungarian Academy of Sciences; Research Centre for Natural Sciences; Magyar tudósok körútja 2 1117 Budapest Hungary
| | - Imre Pápai
- Institute of Organic Chemistry; Hungarian Academy of Sciences; Research Centre for Natural Sciences; Magyar tudósok körútja 2 1117 Budapest Hungary
| | - Attila Domján
- NMR Research Laboratory of IC; Hungarian Academy of Sciences; Research Centre for Natural Sciences; Magyar tudósok körútja 2 1117 Budapest Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Hungarian Academy of Sciences; Research Centre for Natural Sciences; Magyar tudósok körútja 2 1117 Budapest Hungary
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26
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Dorkó É, Szabó M, Kótai B, Pápai I, Domján A, Soós T. Expanding the Boundaries of Water-Tolerant Frustrated Lewis Pair Hydrogenation: Enhanced Back Strain in the Lewis Acid Enables the Reductive Amination of Carbonyls. Angew Chem Int Ed Engl 2017; 56:9512-9516. [PMID: 28591474 DOI: 10.1002/anie.201703591] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 05/21/2017] [Indexed: 12/20/2022]
Abstract
The development of a boron/nitrogen-centered frustrated Lewis pair (FLP) with remarkably high water tolerance is presented. As systematic steric tuning of the boron-based Lewis acid (LA) component revealed, the enhanced back-strain makes water binding increasingly reversible in the presence of relatively strong base. This advance allows the limits of FLP's hydrogenation to be expanded, as demonstrated by the FLP reductive amination of carbonyls. This metal-free catalytic variant displays a notably broad chemoselectivity and generality.
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Affiliation(s)
- Éva Dorkó
- Institute of Organic Chemistry, Hungarian Academy of Sciences, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Márk Szabó
- NMR Research Laboratory of IC, Hungarian Academy of Sciences, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Bianka Kótai
- Institute of Organic Chemistry, Hungarian Academy of Sciences, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Imre Pápai
- Institute of Organic Chemistry, Hungarian Academy of Sciences, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Attila Domján
- NMR Research Laboratory of IC, Hungarian Academy of Sciences, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry, Hungarian Academy of Sciences, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
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27
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Bakos M, Gyömöre Á, Domján A, Soós T. Auto-Tandem Catalysis with Frustrated Lewis Pairs for Reductive Etherification of Aldehydes and Ketones. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700231] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mária Bakos
- Research Centre for Natural Sciences; Hungarian Academy of Sciences; Institute of Organic Chemistry; Magyar tudósok körútja 2 1117 Budapest Hungary
| | - Ádám Gyömöre
- Research Centre for Natural Sciences; Hungarian Academy of Sciences; Institute of Organic Chemistry; Magyar tudósok körútja 2 1117 Budapest Hungary
| | - Attila Domján
- Research Centre for Natural Sciences; Hungarian Academy of Sciences; Institute of Organic Chemistry; Magyar tudósok körútja 2 1117 Budapest Hungary
| | - Tibor Soós
- Research Centre for Natural Sciences; Hungarian Academy of Sciences; Institute of Organic Chemistry; Magyar tudósok körútja 2 1117 Budapest Hungary
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28
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Bakos M, Gyömöre Á, Domján A, Soós T. Auto-Tandem Catalysis with Frustrated Lewis Pairs for Reductive Etherification of Aldehydes and Ketones. Angew Chem Int Ed Engl 2017; 56:5217-5221. [PMID: 28378401 DOI: 10.1002/anie.201700231] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 02/10/2017] [Indexed: 01/19/2023]
Abstract
Herein we report that a single frustrated Lewis pair (FLP) catalyst can promote the reductive etherification of aldehydes and ketones. The reaction does not require an exogenous acid catalyst, but the combined action of FLP on H2 , R-OH or H2 O generates the required Brønsted acid in a reversible, "turn on" manner. The method is not only a complementary metal-free reductive etherification, but also a niche procedure for ethers that would be either synthetically inconvenient or even intractable to access by alternative synthetic protocols.
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Affiliation(s)
- Mária Bakos
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Institute of Organic Chemistry, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Ádám Gyömöre
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Institute of Organic Chemistry, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Attila Domján
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Institute of Organic Chemistry, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Tibor Soós
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Institute of Organic Chemistry, Magyar tudósok körútja 2, 1117, Budapest, Hungary
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29
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Dobi Z, Holczbauer T, Soós T. Front Cover: Schreiner's Thiourea Promoted [2+2] Cycloaddition of Captodative Azetidinones and Nitroolefins (Eur. J. Org. Chem. 11/2017). European J Org Chem 2017. [DOI: 10.1002/ejoc.201700335] [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: 11/11/2022]
Affiliation(s)
- Zoltán Dobi
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
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30
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Affiliation(s)
- Zoltán Dobi
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Research Centre for Natural Sciences; Hungarian Academy of Sciences; P. O. Box 286 1519 Budapest Hungary
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31
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Berkes B, Ozsváth K, Molnár L, Gáti T, Holczbauer T, Kardos G, Soós T. Expedient and Diastereodivergent Assembly of Terpenoid Decalin Subunits having Quaternary Stereocenters through Organocatalytic Robinson Annulation of Nazarov Reagent. Chemistry 2016; 22:18101-18106. [DOI: 10.1002/chem.201604541] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Barbara Berkes
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Kristóf Ozsváth
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Laura Molnár
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry; Záhony Street 7 1031 Budapest Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - György Kardos
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
| | - Tibor Soós
- Institute of Organic Chemistry; Hungarian Academy of Sciences; 1519 Budapest, P.O. Box 286 Hungary
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32
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Soós T, Bacsó A, Szigeti M, Varga S. Bifunctional Thiourea-Catalyzed Stereoablative Retro-Sulfa-Michael Reaction: Concise and Diastereoselective Access to Chiral 2,4-Diarylthietanes. SYNTHESIS-STUTTGART 2016. [DOI: 10.1055/s-0036-1588612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Affiliation(s)
- Ádám Madarász
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Zsolt Dósa
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Szilárd Varga
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Tibor Soós
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
| | - Antal Csámpai
- Institute
of Chemistry, Eötvös Loránd University, P.O. Box 32, H-1518 Budapest-112, Hungary
| | - Imre Pápai
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary
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34
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Varga S, Jakab G, Csámpai A, Soós T. Iterative Coupling of Two Different Enones by Nitromethane Using Bifunctional Thiourea Organocatalysts. Stereocontrolled Assembly of Cyclic and Acyclic Structures. J Org Chem 2015; 80:8990-6. [DOI: 10.1021/acs.joc.5b01474] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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)
- Szilárd Varga
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, HAS, P.O. Box 286, Budapest, H-1519, Hungary
| | - Gergely Jakab
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, HAS, P.O. Box 286, Budapest, H-1519, Hungary
| | - Antal Csámpai
- Institute
of Chemistry, Department of Inorganic Chemistry, L. Eötvös University, Pázmány Péter sétány 1/A, Budapest H-1117, Hungary
| | - Tibor Soós
- Institute
of Organic Chemistry, Research Centre for Natural Sciences, HAS, P.O. Box 286, Budapest, H-1519, Hungary
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35
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Gyömöre Á, Bakos M, Földes T, Pápai I, Domján A, Soós T. Moisture-Tolerant Frustrated Lewis Pair Catalyst for Hydrogenation of Aldehydes and Ketones. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01299] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Ádám Gyömöre
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Mária Bakos
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Tamás Földes
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Imre Pápai
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Attila Domján
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
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36
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Affiliation(s)
- Zoltán Dobi
- Institute of Organic Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1519 Budapest, Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1519 Budapest, Hungary
| | - Tibor Soós
- Institute of Organic Chemistry,
Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1519 Budapest, Hungary
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Varga E, Mika LT, Csámpai A, Holczbauer T, Kardos G, Soós T. Mechanistic investigations of a bifunctional squaramide organocatalyst in asymmetric Michael reaction and observation of stereoselective retro-Michael reaction. RSC Adv 2015. [DOI: 10.1039/c5ra19593d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The mechanism of cinchona–squaramide organocatalytic Michael addition was studied usingin situIR and NMR experiments. As a result, not only kinetic parameters were determined but a stereoselective retro-Michael reaction was also observed.
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Affiliation(s)
- Eszter Varga
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - László Tamás Mika
- Budapest University of Technology and Economics
- Faculty of Chemical Technology and Biotechnology
- Department of Chemical and Environmental Process Engineering
- Budapest
- Hungary
| | - Antal Csámpai
- Institute of Chemistry
- Eötvös Loránd University
- Budapest
- Hungary
| | - Tamás Holczbauer
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - György Kardos
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - Tibor Soós
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
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Jakab A, Dalicsek Z, Holczbauer T, Hamza A, Pápai I, Finta Z, Timári G, Soós T. Superstable Palladium(0) Complex as an Air- and Thermostable Catalyst for Suzuki Coupling Reactions. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403214] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Jakab A, Dalicsek Z, Soós T. A Robust and Efficient Catalyst Possessing an Electron-Deficient Ligand for the Palladium-Catalyzed Direct Arylation of Heteroarenes. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402586] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [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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Abstract
Foot-and-mouth disease (FMD) is one of the most feared of transboundary animal diseases. Accidental or deliberate release of the causative agent can have both direct and indirect effects that result in massive economic losses and disruption. The direct effects of an FMD outbreak include immediate losses to agricultural production and disruption of local economies, while the indirect effects are mainly related to disease control measures such as restriction of market access at local and global levels and the high costs of disease control. To improve the capacity of the European Union (EU) to counter animal bioterrorism threats, AniBioThreat was launched with a special focus on threats to living animals, feed, and food of animal origin. As part of this project, several zoonotic or animal pathogenic agents are considered from different perspectives. FMD virus was selected as one agent to be scrutinized because it is highly contagious and an outbreak can have a severe economic impact. Ways to fight a deliberate outbreak can be demonstrated through the example of FMD. In this article, the virology and epidemiology of FMD virus are discussed with special attention to the related law enforcement aspects.
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Soós T, Dorkó É, Varga E, Gáti T, Holczbauer T, Pápai I, Mehdi H. Steric Control of Geminal Lewis Pair Behavior: Frustration Induced Dyotropic Rearrangement. Synlett 2014. [DOI: 10.1055/s-0033-1339125] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Tibor Soós
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
| | - Éva Dorkó
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
| | - Eszter Varga
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
| | - Tamás Gáti
- Servier Research Institute of Medicinal Chemistry
| | - Tamás Holczbauer
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
| | - Imre Pápai
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
| | - Hasan Mehdi
- Hungarian Academy of Sciences, Research Centre for Natural Sciences, Institute of Organic Chemistry
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Kótai B, Kardos G, Hamza A, Farkas V, Pápai I, Soós T. On the mechanism of bifunctional squaramide-catalyzed organocatalytic Michael addition: a protonated catalyst as an oxyanion hole. Chemistry 2014; 20:5631-9. [PMID: 24677388 DOI: 10.1002/chem.201304553] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Indexed: 12/31/2022]
Abstract
A joint experimental-theoretical study of a bifunctional squaramide-amine-catalyzed Michael addition reaction between 1,3-dioxo nucleophiles and nitrostyrene has been undertaken to gain insight into the nature of bifunctional organocatalytic activation. For this highly stereoselective reaction, three previously proposed mechanistic scenarios for the critical CC bond-formation step were examined. Accordingly, the formation of the major stereoisomeric products is most plausible by one of the bifunctional pathways that involve electrophile activation by the protonated amine group of the catalyst. However, some of the minor product isomers are also accessible through alternative reaction routes. Structural analysis of transition states points to the structural invariance of certain fragments of the transition state, such as the protonated catalyst and the anionic fragment of approaching reactants. Our topological analysis provides deeper insight and a more general understanding of bifunctional noncovalent organocatalysis.
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Affiliation(s)
- Bianka Kótai
- Institute of Organic Chemistry, Research Centre for Natural Sciences of the Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest (Hungary), Fax: (+36) 1-438-1145
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Keserű GM, Soós T, Kappe CO. Anthropogenic reaction parameters – the missing link between chemical intuition and the available chemical space. Chem Soc Rev 2014; 43:5387-99. [DOI: 10.1039/c3cs60423c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Anthropogenic factors limit reaction parameters and thus the scope of synthetic chemistry, nevertheless, their role is both advantageous and critical.
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Affiliation(s)
- György M. Keserű
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest, Hungary
| | - Tibor Soós
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest, Hungary
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Demeter A, Horváth K, Böőr K, Molnár L, Soós T, Lendvay G. Substituent Effect on the Photoreduction Kinetics of Benzophenone. J Phys Chem A 2013; 117:10196-210. [DOI: 10.1021/jp406269e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Attila Demeter
- Institute
of Materials and Environmental Chemistry, ‡Institute of Organic
Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1025 Budapest, Pusztaszeri út 59-67, Hungary
| | - Klaudia Horváth
- Institute
of Materials and Environmental Chemistry, ‡Institute of Organic
Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1025 Budapest, Pusztaszeri út 59-67, Hungary
| | - Katalin Böőr
- Institute
of Materials and Environmental Chemistry, ‡Institute of Organic
Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1025 Budapest, Pusztaszeri út 59-67, Hungary
| | - Laura Molnár
- Institute
of Materials and Environmental Chemistry, ‡Institute of Organic
Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1025 Budapest, Pusztaszeri út 59-67, Hungary
| | - Tibor Soós
- Institute
of Materials and Environmental Chemistry, ‡Institute of Organic
Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1025 Budapest, Pusztaszeri út 59-67, Hungary
| | - György Lendvay
- Institute
of Materials and Environmental Chemistry, ‡Institute of Organic
Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, 1025 Budapest, Pusztaszeri út 59-67, Hungary
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Tárkányi G, Király P, Soós T, Varga S. Active Conformation in Amine-Thiourea Bifunctional Organocatalysis Preformed by Catalyst Aggregation. Chemistry 2012; 18:1918-22. [DOI: 10.1002/chem.201102701] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 12/01/2011] [Indexed: 11/08/2022]
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Erős G, Nagy K, Mehdi H, Pápai I, Nagy P, Király P, Tárkányi G, Soós T. Catalytic Hydrogenation with Frustrated Lewis Pairs: Selectivity Achieved by Size-Exclusion Design of Lewis Acids. Chemistry 2011; 18:574-85. [DOI: 10.1002/chem.201102438] [Citation(s) in RCA: 139] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Indexed: 11/06/2022]
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Varga S, Jakab G, Drahos L, Holczbauer T, Czugler M, Soós T. Double Diastereocontrol in Bifunctional Thiourea Organocatalysis: Iterative Michael–Michael–Henry Sequence Regulated by the Configuration of Chiral Catalysts. Org Lett 2011; 13:5416-9. [DOI: 10.1021/ol201559j] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Szilárd Varga
- Institute of Biomolecular Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, and Institute of Structural Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary
| | - Gergely Jakab
- Institute of Biomolecular Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, and Institute of Structural Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary
| | - László Drahos
- Institute of Biomolecular Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, and Institute of Structural Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary
| | - Tamás Holczbauer
- Institute of Biomolecular Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, and Institute of Structural Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary
| | - Mátyás Czugler
- Institute of Biomolecular Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, and Institute of Structural Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary
| | - Tibor Soós
- Institute of Biomolecular Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary, and Institute of Structural Chemistry, Chemical Research Center of Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary
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Lanfer A, Knof K, Sparano S, Veidebaum T, Papoutsou S, de Henauw S, Soós T, Moreno LA, Ahrens W, Lissner L. Taste preferences in association with dietary habits and weight status in European children – results from the IDEFICS study. Gesundheitswesen 2011. [DOI: 10.1055/s-0031-1283528] [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]
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Abstract
After a short introduction to place our work in a proper context, this account summarizes our theoretical and synthetic results in the field of frustrated Lewis pair (FLP) chemistry.
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Affiliation(s)
- Tibor Soós
- 1Chemical Research Center of the Hungarian Academy of Sciences, P.O. Box 17, 1525 Budapest, Hungary
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