1
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Sakuma M, Haraguchi R. Charge-Enhanced Reactivity of Esters by a Cationic Substituent. Org Lett 2024; 26:6148-6152. [PMID: 39008814 DOI: 10.1021/acs.orglett.4c01962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
In this study, the high electrophilicity of carbonyl carbons attached to cationic heterocycles was observed. Triazolium-substituted esters underwent catalyst-free amidation with aliphatic amines at -50 °C and reduction with NaBH4 at -100 °C. The origin and generality of the high reactivity of these esters were systematically investigated. The findings of this work were utilized for the postmodification of N-heterocyclic carbenes, which are utilized as promising ligands in a wide range of transition-metal-catalyzed reactions.
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Affiliation(s)
- Masaaki Sakuma
- Department of Applied Chemistry, Graduate School of Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
| | - Ryosuke Haraguchi
- Department of Applied Chemistry, Graduate School of Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan
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2
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Yadav R, Das B, Singh A, Anmol, Sharma A, Majumder C, Kundu S. Bicyclic (alkyl)(amino)carbene (BICAAC)-supported phosphinidenes. Dalton Trans 2023; 52:16680-16687. [PMID: 37960973 DOI: 10.1039/d3dt02765a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Herein, the synthesis and characterization of bicyclic (alkyl)(amino)carbene (BICAAC)-stabilized phosphinidenes (1-4) are reported. Compounds 1-3 were obtained by reacting trihalophosphine [PX3, X = Cl (1), Br (2), I (3)] with BICAAC in THF. A BICAAC-stabilized bis-phosphinidene (4) was obtained from the reduction of compound 2. All four compounds were characterized by X-ray crystallography and heteronuclear NMR spectroscopy. Theoretical calculations indicated the predominant C(carbene)P double bond characteristic in compounds 1-4.
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Affiliation(s)
- Ritu Yadav
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Bindusagar Das
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Ashi Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Anmol
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Ankita Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Chinmoy Majumder
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
| | - Subrata Kundu
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India.
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3
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One-pot carbonylation-dehydration tandem reaction of aryl iodides with acylhydrazines for synthesis of 2,5-diaryl-1,3,4-oxadiazoles. MONATSHEFTE FUR CHEMIE 2023. [DOI: 10.1007/s00706-022-03021-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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4
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Li R, Barel N, Subramaniyan V, Cohen O, Tibika F, Tulchinsky Y. Sulfonium cations as versatile strongly π-acidic ligands. Chem Sci 2022; 13:4770-4778. [PMID: 35655889 PMCID: PMC9067576 DOI: 10.1039/d2sc00588c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 03/14/2022] [Indexed: 01/31/2023] Open
Abstract
More than a century old, sulfonium cations are still intriguing species in the landscape of organic chemistry. On one hand they have found broad applications in organic synthesis and materials science, but on the other hand, while isoelectronic to the ubiquitous tertiary phosphine ligands, their own coordination chemistry has been neglected for the last three decades. Here we report the synthesis and full characterization of the first Rh(i) and Pt(ii) complexes of sulfonium. Moreover, for the first time, coordination of an aromatic sulfonium has been established. A thorough computational analysis of the exceptionally short S-Rh bonds obtained attests to the strongly π-accepting nature of sulfonium cations and places them among the best π-acceptor ligands available today. Our calculations also show that embedding within a pincer framework enhances their π-acidity even further. Therefore, in addition to the stability and modularity that these frameworks offer, our pincer complexes might open the way for sulfonium cations to become powerful tools in π-acid catalysis.
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Affiliation(s)
- Ruiping Li
- Institute of Chemistry, The Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | - Nitsan Barel
- Institute of Chemistry, The Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | | | - Orit Cohen
- Institute of Chemistry, The Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | - Françoise Tibika
- Institute of Chemistry, The Hebrew University of Jerusalem Jerusalem 9190401 Israel
| | - Yuri Tulchinsky
- Institute of Chemistry, The Hebrew University of Jerusalem Jerusalem 9190401 Israel
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5
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Bhattacharjee J, Bockfeld D, Tamm M. N-Heterocyclic Carbene-Phosphinidenide Complexes as Hydroboration Catalysts. J Org Chem 2022; 87:1098-1109. [PMID: 35007063 DOI: 10.1021/acs.joc.1c02377] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The reactions of the N-heterocyclic carbene-phosphinidene adducts (NHC)PSiMe3 and (NHC)PH with the dinuclear ruthenium and osmium complexes [(η6-p-cymene)MCl2]2 (M = Ru, Os) afforded the half-sandwich complexes [(η6-p-cymene){(NHC)P}MCl] and [(η6-p-cymene){(NHC)PH}MCl2] with two- and three-legged piano-stool geometries, respectively (NHC = IDipp, IMes; IDipp = 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene; IMes = 1,3-bis(2,4,6-trimethylphenyl)imidazolin-2-ylidene). The complexes were initially tested as precatalysts for the hydroboration of benzonitrile, and the most active species, the ruthenium complex [(η6-p-cymene){(IMes)P}RuCl], was further used for the efficient hydroboration of a wide range (ca. 50 substrates) of nitriles, carboxylic esters, and carboxamides in neat pinacolborane (HBpin) under comparatively mild reaction conditions (60-80 °C, 3-5 mol % catalyst loading). Preliminary mechanistic and kinetic studies are reported, and stoichiometric reactions with HBpin indicate the initial formation of the monohydride complex [(η6-p-cymene){(IMes)P}RuH] as the putative catalytically active species.
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Affiliation(s)
- Jayeeta Bhattacharjee
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Dirk Bockfeld
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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6
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Hanusch F, Munz D, Sutter J, Meyer K, Inoue S. A Zwitterionic Heterobimetallic Gold-Iron Complex Supported by Bis(N-Heterocyclic Imine)Silyliumylidene. Angew Chem Int Ed Engl 2021; 60:23274-23280. [PMID: 34411406 PMCID: PMC8596601 DOI: 10.1002/anie.202108146] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Indexed: 01/15/2023]
Abstract
The facile synthesis of the first bis-N-heterocyclic imine-stabilized chlorosilyliumylidene 1 is reported. Remarkably, consecutive reaction of 1 with PPh3 AuCl and K2 Fe(CO)4 gives rise to the unique heterobimetallic complex 1,2-(Mes NHI)2 -C2 H4 -ClSiAuFe(CO)4 (4). The overall neutral complex 4 bears an unusual linear Si-Au-Fe structure and a rare anagostic interaction between the d10 -configured gold atom and a CH bond of the mesityl ligand. According to the computational analysis and 57 Fe Mössbauer spectroscopy, the formal Fe-oxidation state remains at -II. Thus, the electronic structure of 4 is best described as an overall neutral-yet zwitterionic-heterobimetallic "Si(II)+ -Au(I)+ -Fe(-II)2- "-silyliumylidene complex, derived from double anion exchange. The computational analysis indicates strong hyperconjugative back donation from the gold(I) atom to the silyliumylidene ligand.
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Affiliation(s)
- Franziska Hanusch
- Department of ChemistryCatalysis Research Center and Institute of Silicon ChemistryTechnische Universität München (TUM)Lichtenbergstrasse 485748Garching bei MünchenGermany
| | - Dominik Munz
- Faculty of Natural Sciences and TechnologyInorganic Chemistry: Coordination ChemistrySaarland UniversityCampus C4 166123SaarbrückenGermany
- Department of Chemistry and PharmacyInorganic ChemistryFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU)Egerlandstrasse 191058ErlangenGermany
| | - Jörg Sutter
- Department of Chemistry and PharmacyInorganic ChemistryFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU)Egerlandstrasse 191058ErlangenGermany
| | - Karsten Meyer
- Department of Chemistry and PharmacyInorganic ChemistryFriedrich-Alexander-Universität Erlangen-Nürnberg (FAU)Egerlandstrasse 191058ErlangenGermany
| | - Shigeyoshi Inoue
- Department of ChemistryCatalysis Research Center and Institute of Silicon ChemistryTechnische Universität München (TUM)Lichtenbergstrasse 485748Garching bei MünchenGermany
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7
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Hanusch F, Munz D, Sutter J, Meyer K, Inoue S. A Zwitterionic Heterobimetallic Gold–Iron Complex Supported by Bis(
N
‐Heterocyclic Imine)Silyliumylidene. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108146] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Franziska Hanusch
- Department of Chemistry Catalysis Research Center and Institute of Silicon Chemistry Technische Universität München (TUM) Lichtenbergstrasse 4 85748 Garching bei München Germany
| | - Dominik Munz
- Faculty of Natural Sciences and Technology Inorganic Chemistry: Coordination Chemistry Saarland University Campus C4 1 66123 Saarbrücken Germany
- Department of Chemistry and Pharmacy Inorganic Chemistry Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) Egerlandstrasse 1 91058 Erlangen Germany
| | - Jörg Sutter
- Department of Chemistry and Pharmacy Inorganic Chemistry Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) Egerlandstrasse 1 91058 Erlangen Germany
| | - Karsten Meyer
- Department of Chemistry and Pharmacy Inorganic Chemistry Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) Egerlandstrasse 1 91058 Erlangen Germany
| | - Shigeyoshi Inoue
- Department of Chemistry Catalysis Research Center and Institute of Silicon Chemistry Technische Universität München (TUM) Lichtenbergstrasse 4 85748 Garching bei München Germany
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8
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Sawaguchi D, Hayakawa S, Sakuma M, Niitsuma K, Kase D, Michii S, Ozawa M, Sakai Y, Sakamaki K, Ueyama K, Haraguchi R. Improved Synthesis of 1,2,3‐Triazolium Salts via Oxidative [3+2] Cycloaddition of Triazenes with Alkynes and Their Deprotonative Functionalization. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Daiki Sawaguchi
- Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
| | - Shunsuke Hayakawa
- Department of Applied Chemistry Graduate School of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
| | - Masaaki Sakuma
- Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
| | - Kenta Niitsuma
- Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
| | - Daiya Kase
- Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
| | - Shota Michii
- Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
| | - Miyuki Ozawa
- Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
| | - Yusuke Sakai
- Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
| | - Kentaro Sakamaki
- Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
| | - Kyohei Ueyama
- Department of Applied Chemistry Graduate School of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
| | - Ryosuke Haraguchi
- Department of Applied Chemistry Faculty of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
- Department of Applied Chemistry Graduate School of Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Narashino, Chiba 275-0016 Japan
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9
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Ariga K, Shionoya M. Nanoarchitectonics for Coordination Asymmetry and Related Chemistry. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200362] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Katsuhiko Ariga
- World Premier International (WPI) Research Centre for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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10
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Franchino A, Montesinos-Magraner M, Echavarren AM. Silver-Free Catalysis with Gold(I) Chloride Complexes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200358] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Allegra Franchino
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Marc Montesinos-Magraner
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Antonio M. Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain
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11
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12
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Zieliński A, Marset X, Golz C, Wolf LM, Alcarazo M. Two‐Step Synthesis of Heptacyclo[6.6.0.0
2,6
.0
3,13
.0
4,11
.0
5,9
.0
10,14
] tetradecane from Norbornadiene: Mechanism of the Cage Assembly and Post‐synthetic Functionalization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Adam Zieliński
- Institut für Organische und Biomolekulare Chemie Georg August Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Xavier Marset
- Institut für Organische und Biomolekulare Chemie Georg August Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie Georg August Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Lawrence M. Wolf
- Department of Chemistry University of Massachusetts Lowell Lowell MA 01854 USA
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie Georg August Universität Göttingen Tammannstr 2 37077 Göttingen Germany
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13
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Zieliński A, Marset X, Golz C, Wolf LM, Alcarazo M. Two-Step Synthesis of Heptacyclo[6.6.0.0 2,6 .0 3,13 .0 4,11 .0 5,9 .0 10,14 ] tetradecane from Norbornadiene: Mechanism of the Cage Assembly and Post-synthetic Functionalization. Angew Chem Int Ed Engl 2020; 59:23299-23305. [PMID: 32881255 PMCID: PMC7756769 DOI: 10.1002/anie.202010766] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Indexed: 01/18/2023]
Abstract
A selective and scalable two-step approach to the dimerization of norbornadiene (NBD) into its thermodynamically most stable dimer, heptacyclo[6.6.0.02,6 .03,13 .04,11 .05,9 .010,14 ] tetradecane, (HCTD) is reported. Calculations indicate that the reaction starts with the Rh-catalyzed stepwise homo Diels-Alder cyclisation of NBD into its exo-cis-endo dimer. Treatment of this compound with acid promotes its evolution to HCTD via a [1,2]-sigmatropic rearrangement. The assemblies of 7,12-disubstituted cages from 7-(alkyl/aryl) NBDs, as well as the selective post-synthetic C-H functionalization of the core HCTD scaffold at position C1, or positions C1 and C4 are described.
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Affiliation(s)
- Adam Zieliński
- Institut für Organische und Biomolekulare ChemieGeorg August Universität GöttingenTammannstr 237077GöttingenGermany
| | - Xavier Marset
- Institut für Organische und Biomolekulare ChemieGeorg August Universität GöttingenTammannstr 237077GöttingenGermany
| | - Christopher Golz
- Institut für Organische und Biomolekulare ChemieGeorg August Universität GöttingenTammannstr 237077GöttingenGermany
| | - Lawrence M. Wolf
- Department of ChemistryUniversity of Massachusetts LowellLowellMA01854USA
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare ChemieGeorg August Universität GöttingenTammannstr 237077GöttingenGermany
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14
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Johannsen T, Golz C, Alcarazo M. α‐Kationische Phosphole: Synthese und Anwendungen als Liganden. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Tim Johannsen
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammanstr. 2 Göttingen Deutschland
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammanstr. 2 Göttingen Deutschland
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie Georg-August-Universität Göttingen Tammanstr. 2 Göttingen Deutschland
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15
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Johannsen T, Golz C, Alcarazo M. α-Cationic Phospholes: Synthesis and Applications as Ancillary Ligands. Angew Chem Int Ed Engl 2020; 59:22779-22784. [PMID: 32853445 PMCID: PMC7756421 DOI: 10.1002/anie.202009303] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/23/2020] [Indexed: 01/14/2023]
Abstract
A series of structurally differentiated α‐cationic phospholes containing cyclopropenium, imidazolium, and iminium substituents has been synthesized by reaction of chlorophosphole 1 with the corresponding stable carbenes. Evaluation of the donor properties of these compounds reveals that their strong π‐acceptor character is heavily influenced by the nature of the cationic group. The coordination chemistry of these newly prepared ligands towards AuI centers is also described and their unique electronic properties exploited in catalysis. Interestingly, α‐cationic phosphole containing catalysts were not only able to accelerate model cycloisomerization reactions, but also to efficiently discriminate between concurrent reaction pathways, avoiding the formation of undesired product mixtures.
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Affiliation(s)
- Tim Johannsen
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammanstr. 2, Göttingen, Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammanstr. 2, Göttingen, Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammanstr. 2, Göttingen, Germany
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16
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Sprenger K, Golz C, Alcarazo M. Synthesis of Cycloheptatrienes, Oxepines, Thiepines, and Silepines: A Comparison between Brønsted Acid and Au‐Catalysis. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001072] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kristin Sprenger
- Institut für Organische und Biomolekulare Chemie Georg‐August‐Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie Georg‐August‐Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie Georg‐August‐Universität Göttingen Tammannstr 2 37077 Göttingen Germany
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17
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Malchau C, Loose F, Mees Y, Duppe J, Sun Y, Niedner-Schatteburg G, Thiel WR. Electronic Properties of a Cationic Triphenylphosphine Ligand Decorated with a (η5-C5H5)Fe Group in Late-Transition-Metal Complexes. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00414] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Malchau
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße 54, 67663 Kaiserslautern, Germany
| | - Florian Loose
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße 54, 67663 Kaiserslautern, Germany
| | - Yannick Mees
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße 54, 67663 Kaiserslautern, Germany
- Research Center OPTIMAS, Erwin-Schrödinger Straße 46, D-67663 Kaiserslautern, Germany
| | - Jens Duppe
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße 54, 67663 Kaiserslautern, Germany
| | - Yu Sun
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße 54, 67663 Kaiserslautern, Germany
| | - Gereon Niedner-Schatteburg
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße 54, 67663 Kaiserslautern, Germany
- Research Center OPTIMAS, Erwin-Schrödinger Straße 46, D-67663 Kaiserslautern, Germany
| | - Werner R. Thiel
- Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße 54, 67663 Kaiserslautern, Germany
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18
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Hartung T, Machleid R, Simon M, Golz C, Alcarazo M. Enantioselective Synthesis of 1,12‐Disubstituted [4]Helicenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915870] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Thierry Hartung
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Rafael Machleid
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Martin Simon
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen Tammannstr 2 37077 Göttingen Germany
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19
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Hartung T, Machleid R, Simon M, Golz C, Alcarazo M. Enantioselective Synthesis of 1,12-Disubstituted [4]Helicenes. Angew Chem Int Ed Engl 2020; 59:5660-5664. [PMID: 31961992 PMCID: PMC7154633 DOI: 10.1002/anie.201915870] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Indexed: 12/16/2022]
Abstract
A highly enantioselective synthesis of 1,12-disubstituted [4]carbohelicenes is reported. The key step for the developed synthetic route is a Au-catalyzed intramolecular alkyne hydroarylation, which is achieved with good to excellent regio- and enantioselectivity by employing TADDOL-derived (TADDOL=α,α,α,α-tetraaryl-1,3-dioxolane-4,5-dimethanol) α-cationic phosphonites as ancillary ligands. Moreover, an appropriate design of the substrate makes the assembly of [4]helicenes of different substitution patterns possible, thus demonstrating the synthetic utility of the method. The absolute stereochemistry of the newly prepared structures was determined by X-ray crystallography and characterization of their photophysical properties is also reported.
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Affiliation(s)
- Thierry Hartung
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Rafael Machleid
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Martin Simon
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
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20
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Kafuta K, Korzun A, Böhm M, Golz C, Alcarazo M. Synthesis, Structure, and Reactivity of 5-(Aryl)dibenzothiophenium Triflates. Angew Chem Int Ed Engl 2020; 59:1950-1955. [PMID: 31680351 PMCID: PMC7004049 DOI: 10.1002/anie.201912383] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Indexed: 01/13/2023]
Abstract
A synthetic protocol for the preparation of 5-(aryl)dibenzothiophenium salts starting from inexpensive dibenzothiophene S-oxide and simple arenes is reported. The scope of the method regarding the nature of the arene is evaluated, intermediates along the reaction sequence have been trapped, and side-reactions identified. In addition, the X-ray structures of a complete set of these salts are reported and their reactivities studied. Specifically, chemoselective Suzuki coupling is observed at the dibenzothiophenium in the presence of iodides.
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Affiliation(s)
- Kevin Kafuta
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstr. 2GöttingenGermany
| | - André Korzun
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstr. 2GöttingenGermany
| | - Marvin Böhm
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstr. 2GöttingenGermany
| | - Christopher Golz
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstr. 2GöttingenGermany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität GöttingenTammannstr. 2GöttingenGermany
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21
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Zhang J, Simon M, Golz C, Alcarazo M. Gold‐Catalyzed Atroposelective Synthesis of 1,1′‐Binaphthalene‐2,3′‐diols. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201915456] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jianwei Zhang
- Institut für Organische und Biomolekulare Chemie Georg August Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Martin Simon
- Institut für Organische und Biomolekulare Chemie Georg August Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie Georg August Universität Göttingen Tammannstr 2 37077 Göttingen Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie Georg August Universität Göttingen Tammannstr 2 37077 Göttingen Germany
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22
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Zhang J, Simon M, Golz C, Alcarazo M. Gold-Catalyzed Atroposelective Synthesis of 1,1'-Binaphthalene-2,3'-diols. Angew Chem Int Ed Engl 2020; 59:5647-5650. [PMID: 31859408 PMCID: PMC7155015 DOI: 10.1002/anie.201915456] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Indexed: 01/15/2023]
Abstract
A highly atroposelective (up to 97 % ee) Au‐catalyzed synthesis of 1,1′‐binaphthalene‐2,3′‐diols is reported starting from a range of substituted benzyl alkynones. Essential for the achievement of high enantioselectivity during the key assembly of the naphto‐3‐ol unit is the use of TADDOL‐derived α‐cationic phosphonites as ancillary ligands. Preliminary results demonstrate that the transformation of the obtained binaphthyls into axially chiral monodentate phosphines is possible without degradation of enantiopurity.
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Affiliation(s)
- Jianwei Zhang
- Institut für Organische und Biomolekulare Chemie, Georg August Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Martin Simon
- Institut für Organische und Biomolekulare Chemie, Georg August Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie, Georg August Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg August Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
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23
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Kafuta K, Korzun A, Böhm M, Golz C, Alcarazo M. Synthesis, Structure, and Reactivity of 5‐(Aryl)dibenzothiophenium Triflates. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201912383] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Kevin Kafuta
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstr. 2 Göttingen Germany
| | - André Korzun
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstr. 2 Göttingen Germany
| | - Marvin Böhm
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstr. 2 Göttingen Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstr. 2 Göttingen Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstr. 2 Göttingen Germany
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24
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Marset X, Saavedra B, González-Gallardo N, Beaton A, León MM, Luna R, Ramón DJ, Guillena G. Palladium Mesoionic Carbene Pre-catalyst for General Cross-Coupling Transformations in Deep Eutectic Solvents. Front Chem 2019; 7:700. [PMID: 31709230 PMCID: PMC6819497 DOI: 10.3389/fchem.2019.00700] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 10/08/2019] [Indexed: 11/26/2022] Open
Abstract
A strong σ-donor mesoionic carbene ligand has been synthesized and applied to four different palladium-catalyzed cross-coupling transformations, proving the catalyst/medium compatibility and the increased activity of this system over previous reports in Deep Eutectic Solvent medium. Some cross-coupling processes could be carried out at room temperature and using aryl chlorides as starting materials. The possible implementation of multistep synthesis in eutectic mixtures has also been explored. The presence of palladium nanoparticles in the reaction media has been evaluated and correlated to the observed activity.
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Affiliation(s)
- Xavier Marset
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Beatriz Saavedra
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Nerea González-Gallardo
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Alexander Beaton
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Martín M León
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Raúl Luna
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Diego J Ramón
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
| | - Gabriela Guillena
- Departamento de Química Orgánica, Facultad de Ciencias, Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
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25
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Averesch KFG, Pesch H, Golz C, Alcarazo M. Synthesis of Alkynylthiopyridinium Salts and Their Use as Thioketene Equivalents. Chemistry 2019; 25:10472-10477. [PMID: 31168874 DOI: 10.1002/chem.201901895] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 05/24/2019] [Indexed: 11/10/2022]
Abstract
A synthetic method has been developed for the preparation of dihalo(pyridinium)sulfuranes and their transformation into alkynylthiopyridinium salts, starting from inexpensive thiopyridones. The reactivity of these salts towards different nucleophiles is evaluated. Most thiols and amines are converted into dithioesters and thioamides, respectively; whereas sterically demanding thiols delivered alkynylthioethers. These results, together with preliminary mechanistic studies reveal that alkynylthiopyridinium salts can be considered synthetic equivalents of unstable thioketenes.
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Affiliation(s)
- Kai F G Averesch
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Henner Pesch
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
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