1
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Hamamoto Y, Ochiai K, Li Y, Tapavicza E, Ito S. Synthesis and Properties of Azahomocorannulenyl Cations and Radicals. Angew Chem Int Ed Engl 2024; 63:e202319022. [PMID: 38153357 DOI: 10.1002/anie.202319022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 12/22/2023] [Accepted: 12/28/2023] [Indexed: 12/29/2023]
Abstract
Cycloheptatrienyl (tropyl) molecules are representative non-alternant hydrocarbons that offer interesting chemistry because of their unique structures and properties. However, there have been a limited number of polycyclic aromatic tropyl cations and radicals reported in the literature. Herein, we report the synthesis of a series of azahomocorannulene derivatives, where the key reactions are a 1,3-dipolar cycloaddition of polycyclic aromatic azomethine ylides with dibenzotropone and a subsequent palladium-catalyzed cyclization. X-ray diffraction analysis revealed that the obtained azahomocorannulenyl cation and radical adopt planar structures and exhibit unique packing structures. Their electronic and optical properties were investigated experimentally and theoretically to reveal their aromatic character.
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Affiliation(s)
- Yosuke Hamamoto
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Kotaro Ochiai
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Yongxin Li
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Enrico Tapavicza
- Department of Chemistry and Biochemistry, California State University, Long Beach, 1250 Bellflower Boulevard, Long Beach, CA 90840, USA
| | - Shingo Ito
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
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2
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Liu HC, Ruan K, Ma K, Fei J, Lin YM, Xia H. Synthesis of metalla-dual-azulenes with fluoride ion recognition properties. Nat Commun 2023; 14:5583. [PMID: 37696902 PMCID: PMC10495402 DOI: 10.1038/s41467-023-41250-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/28/2023] [Indexed: 09/13/2023] Open
Abstract
Azulene-based conjugated systems are of great interests due to their unusual structures and photophysical properties. Incorporation of a transition metal into azulene skeleton presents an intriguing opportunity to combine the dπ-pπ and pπ-pπ conjugated properties. No such metallaazulene skeleton however has been reported to date. Here, we describe our development of an efficient [5 + 2] annulation reaction to rapid construction of a unique metal-containing [5-5-7] scaffold, termed metalla-dual-azulene (MDA), which includes a metallaazulene and a metal-free organic azulene intertwined by sharing the tropylium motif. The two azulene motifs in MDA exhibit distinct reactivities. The azulene motif readily undergoes nucleophilic addition, leading to N-, O- and S-substituted cycloheptanetrienyl species. Demetalation of the metallaazulene moiety occurs when it reacts with nBu4NF, which enables highly selective recognition of fluoride anion and a noticeable color change. The practical [5 + 2] annulation methodology, facile functional-group modification, high and selective fluoride detection make this new π-conjugated polycyclic system very suitable for potential applications in photoelectric and sensing materials.
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Affiliation(s)
- Hai-Cheng Liu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, Fujian, China
| | - Kaidong Ruan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, Fujian, China
| | - Kexin Ma
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, Fujian, China
| | - Jiawei Fei
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, Fujian, China
| | - Yu-Mei Lin
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, Fujian, China.
| | - Haiping Xia
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, Fujian, China.
- Department of Chemistry, Shenzhen Grubbs Institute, Southern University of Science and Technology, 518055, Shenzhen, China.
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3
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Zahra FT, Saeed A, Mumtaz K, Albericio F. Tropylium Ion, an Intriguing Moiety in Organic Chemistry. Molecules 2023; 28:molecules28104095. [PMID: 37241836 DOI: 10.3390/molecules28104095] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/06/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
The tropylium ion is a non-benzenoid aromatic species that works as a catalyst. This chemical entity brings about a large number of organic transformations, such as hydroboration reactions, ring contraction, the trapping of enolates, oxidative functionalization, metathesis, insertion, acetalization, and trans-acetalization reactions. The tropylium ion also functions as a coupling reagent in synthetic reactions. This cation's versatility can be seen in its role in the synthesis of macrocyclic compounds and cage structures. Bearing a charge, the tropylium ion is more prone to nucleophilic/electrophilic reactions than neutral benzenoid equivalents. This ability enables it to assist in a variety of chemical reactions. The primary purpose of using tropylium ions in organic reactions is to replace transition metals in catalysis chemistry. It outperforms transition-metal catalysts in terms of its yield, moderate conditions, non-toxic byproducts, functional group tolerance, selectivity, and ease of handling. Furthermore, the tropylium ion is simple to synthesize in the laboratory. The current review incorporates the literature reported from 1950 to 2021; however, the last two decades have witnessed a phenomenal upsurge in the utilization of the tropylium ion in the facilitation of organic conversions. The importance of the tropylium ion as an environmentally safe catalyst in synthesis and a comprehensive summary of some important reactions catalyzed via tropylium cations are described.
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Affiliation(s)
- Fatima Tuz Zahra
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Aamer Saeed
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Khansa Mumtaz
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Fernando Albericio
- School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4001, South Africa
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, Department of Organic Chemistry, University of Barcelona, 08028 Barcelona, Spain
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4
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Saha PK, Mallick A, Turley AT, Bismillah AN, Danos A, Monkman AP, Avestro AJ, Yufit DS, McGonigal PR. Rupturing aromaticity by periphery overcrowding. Nat Chem 2023; 15:516-525. [PMID: 36879076 PMCID: PMC10070187 DOI: 10.1038/s41557-023-01149-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 01/26/2023] [Indexed: 03/08/2023]
Abstract
The balance between strain relief and aromatic stabilization dictates the form and function of non-planar π-aromatics. Overcrowded systems are known to undergo geometric deformations, but the energetically favourable π-electron delocalization of their aromatic ring(s) is typically preserved. In this study we incremented the strain energy of an aromatic system beyond its aromatic stabilization energy, causing it to rearrange and its aromaticity to be ruptured. We noted that increasing the steric bulk around the periphery of π-extended tropylium rings leads them to deviate from planarity to form contorted conformations in which aromatic stabilization and strain are close in energy. Under increasing strain, the aromatic π-electron delocalization of the system is broken, leading to the formation of a non-aromatic, bicyclic analogue referred to as 'Dewar tropylium'. The aromatic and non-aromatic isomers have been found to exist in rapid equilibrium with one another. This investigation demarcates the extent of steric deformation tolerated by an aromatic carbocycle and thus provides direct experimental insights into the fundamental nature of aromaticity.
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Affiliation(s)
| | | | | | | | - Andrew Danos
- Department of Physics, Durham University, Durham, UK
| | | | | | | | - Paul R McGonigal
- Department of Chemistry, Durham University, Durham, UK.
- Department of Chemistry, University of York, York, UK.
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5
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Mann JS, Mai BK, Nguyen TV. Carbocation-Catalyzed Intramolecular and Intermolecular Carbonyl-Alkyne Metathesis Reactions. ACS Catal 2023. [DOI: 10.1021/acscatal.2c06016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- Jasnoor S. Mann
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Thanh Vinh Nguyen
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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6
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Boldrini C, Reis MC, Harutyunyan SR. Electrophilic Trapping of Semibenzenes. J Org Chem 2022; 87:12772-12782. [PMID: 36095222 PMCID: PMC9552181 DOI: 10.1021/acs.joc.2c01331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
In this work, we
demonstrate how allylative dearomatization of
benzyl chlorides can provide direct access to a variety of semibenzenes.
These scaffolds behave as highly reactive nucleophiles in the presence
of carbocations. In addition, semibenzenes are susceptible to intramolecular
rearrangements rendering a broad scope of functionalized arenes. An
analysis of this new reactivity is reported, as well as the rationale
behind the observed intramolecular reorganizations.
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Affiliation(s)
- Cosimo Boldrini
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Marta Castiñeira Reis
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Syuzanna R Harutyunyan
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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7
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Kinoshita R, Tomura F, Fujita T, Ichikawa J. A New Family of Tropylium Ions: Tropone–Triarylborane Complexes. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ryo Kinoshita
- University of Tsukuba: Tsukuba Daigaku Division of Chemistry JAPAN
| | - Fumiya Tomura
- University of Tsukuba: Tsukuba Daigaku Division of Chemistry JAPAN
| | - Takeshi Fujita
- University of Tsukuba: Tsukuba Daigaku Division of Chemistry JAPAN
| | - Junji Ichikawa
- University of Tsukuba Department of Chemistry 1-1-1 Tennodai 305-8571 Tsukuba JAPAN
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8
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Yunnikova LP, Neustroev DA. Nucleophilic Functionalization of Tropylium Salts with Aromatic Amines. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428022030010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Lyons DJM, Dinh AH, Ton NNH, Crocker RD, Mai BK, Nguyen TV. Ring Contraction of Tropylium Ions into Benzenoid Derivatives. Org Lett 2022; 24:2520-2525. [PMID: 35324211 DOI: 10.1021/acs.orglett.2c00663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a method to convert substituted tropylium ions into benzenoid derivatives.
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Affiliation(s)
- Demelza J M Lyons
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - An H Dinh
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Nhan N H Ton
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Reece D Crocker
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Thanh Vinh Nguyen
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
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10
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Rekha, Sharma S, Singh G, Vijaya Anand R. Tropylium Salt-Promoted Vinylogous Aza-Michael Addition of Carbamates to para-Quinone Methides: Elaboration to Diastereomerically Pure α,α'-Diarylmethyl Carbamates. ACS ORGANIC & INORGANIC AU 2021; 2:186-196. [PMID: 36855457 PMCID: PMC9954356 DOI: 10.1021/acsorginorgau.1c00033] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Carbocation catalysis is emerging as an important subarea of Lewis acid catalysis. Some stable and isolable carbocations have been successfully utilized as Lewis acid catalysts and promoters in many synthetic transformations. In this manuscript, we report a tropylium cation-promoted vinylogous aza-Michael addition of carbamates to para-quinone methides (QMs) to access a wide range of unsymmetrical α,α'-diarylmethyl carbamates. This mild protocol was effective for the vinylogous conjugate addition of (-)-menthyl carbamate to p-QMs, and the respective diastereomerically pure α,α'-diarylmethyl carbamate derivatives could be obtained in excellent yields and diastereoselectivities (up to >20:1 de).
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11
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Crocker RD, Pace DP, Zhang B, Lyons DJM, Bhadbhade MM, Wong WWH, Mai BK, Nguyen TV. Unusual Alternating Crystallization-Induced Emission Enhancement Behavior in Nonconjugated ω-Phenylalkyl Tropylium Salts. J Am Chem Soc 2021; 143:20384-20394. [PMID: 34807589 DOI: 10.1021/jacs.1c10038] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The alternating physical properties, especially melting points, of α,ω-disubstituted n-alkanes and their parent n-alkanes had been known since Baeyer's report in 1877. There is, however, no general and comprehensive explanation for such a phenomenon. Herein, we report the synthesis and examination of a series of novel ω-phenyl n-alkyl tropylium tetrafluoroborates, which also display alternation in their physicochemical characters. Despite being organic salts, the compounds with odd numbers of carbons in the alkyl bridge exist as room temperature ionic liquids. In stark contrast to this, the analogues with even numbers of carbons in the linker are crystalline solids. These solid nonconjugated molecules exhibit curious photoluminescent properties, which can be attributed to their ability to form through-space charge-transfer complexes to cause crystallization-induced emission enhancement. Most notably, the compound with the highest photoluminescent quantum yield in this series showed an unusual arrangement of carbocationic dimer in the solid state. A combination of XRD analysis and ab initio calculations revealed interesting insights into these systems.
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Affiliation(s)
- Reece D Crocker
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Domenic P Pace
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Bolong Zhang
- Bio21 Institute and School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia.,ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia
| | - Demelza J M Lyons
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Mohan M Bhadbhade
- Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia
| | - Wallace W H Wong
- Bio21 Institute and School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia.,ARC Centre of Excellence in Exciton Science, School of Chemistry, University of Melbourne, Parkville, VIC 3010, Australia
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Thanh Vinh Nguyen
- School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
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12
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Abstract
The Ritter reaction used to be one of the most powerful synthetic tools to functionalize alcohols and nitriles, providing valuable N-alkyl amide products. However, this reaction has not been frequently used in modern organic synthesis due to its employment of strongly acidic and harsh reaction conditions, which often lead to complicated side reactions. Herein, we report the development of a new method using salts of the tropylium ion to promote the Ritter reaction. This method works well on a range of alcohol and nitrile substrates, giving the corresponding products in good to excellent yields. This reaction protocol is amenable to microwave and continuous flow reactors, offering an attractive opportunity for further applications in organic synthesis.
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Affiliation(s)
- Son H Doan
- School of Chemistry, University of New South Wales, Sydney, Australia.
| | - Mohanad A Hussein
- School of Chemistry, University of New South Wales, Sydney, Australia.
| | - Thanh Vinh Nguyen
- School of Chemistry, University of New South Wales, Sydney, Australia.
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13
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Hori D, Yum JH, Sugiyama H, Park S. Tropylium Derivatives as New Entrants that Sense Quadruplex Structures. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Daisuke Hori
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Ji Hye Yum
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hiroshi Sugiyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida-ushinomiyacho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Soyoung Park
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
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14
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Ton NNH, Mai BK, Nguyen TV. Tropylium-Promoted Hydroboration Reactions: Mechanistic Insights Via Experimental and Computational Studies. J Org Chem 2021; 86:9117-9133. [PMID: 34134487 DOI: 10.1021/acs.joc.1c01208] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydroboration reaction of alkynes is one of the most synthetically powerful tools to access organoboron compounds, versatile precursors for cross-coupling chemistry. This type of reaction has traditionally been mediated by transition-metal or main group catalysts. Herein, we report a novel method using tropylium salts, typically known as organic oxidants and Lewis acids, to promote the hydroboration reaction of alkynes. A broad range of vinylboranes can be easily accessed via this metal-free protocol. Similar hydroboration reactions of alkenes and epoxides can also be efficiently catalyzed by the same tropylium catalysts. Experimental studies and DFT calculations suggested that the reaction follows an uncommon mechanistic pathway, which is triggered by the hydride abstraction of pinacolborane with tropylium ion. This is followed by a series of in situ counterion-activated substituent exchanges to generate boron intermediates that promote the hydroboration reaction.
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Affiliation(s)
- Nhan N H Ton
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Thanh Vinh Nguyen
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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15
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Belyaev A, Chou P, Koshevoy IO. Cationic Organophosphorus Chromophores: A Diamond in the Rough among Ionic Dyes. Chemistry 2021; 27:537-552. [PMID: 32492231 PMCID: PMC7821147 DOI: 10.1002/chem.202001853] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Indexed: 12/21/2022]
Abstract
Tunable electron-accepting properties of the cationic phosphorus center, its geometry and unique preparative chemistry that allows combining this unit with diversity of π-conjugated motifs, define the appealing photophysical and electrochemical characteristics of organophosphorus ionic chromophores. This Minireview summarizes the achievements in the synthesis of the π-extended molecules functionalized with P-cationic fragments, modulation of their properties by means of structural modification, and emphasizes the important effect of cation-anion interactions, which can drastically change physical behavior of these two-component systems.
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Affiliation(s)
- Andrey Belyaev
- Department of ChemistryUniversity of Eastern FinlandYliopistokatu 780101JoensuuFinland
| | - Pi‐Tai Chou
- Department of ChemistryNational (Taiwan) UniversityTaipei106Taiwan
| | - Igor O. Koshevoy
- Department of ChemistryUniversity of Eastern FinlandYliopistokatu 780101JoensuuFinland
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16
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Empel C, Nguyen TV, Koenigs RM. Tropylium-Catalyzed O–H Insertion Reactions of Diazoalkanes with Carboxylic Acids. Org Lett 2021; 23:548-553. [DOI: 10.1021/acs.orglett.0c04069] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Claire Empel
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Thanh Vinh Nguyen
- School of Chemistry, University of New South Wales, Sydney 2052, NSW, Australia
| | - Rene M. Koenigs
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
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17
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Sattar F, Feng Z, Zou H, Ye H, Zhang Y, You L. Dynamic covalent bond constrained ureas for multimode fluorescence switching, thermally induced emission, and chemical signaling cascades. Org Chem Front 2021. [DOI: 10.1039/d1qo00500f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A combination of organic ureas and dynamic covalent chemistry was demonstrated for multistate switching, thermally induced fluorescence, and signaling cascades.
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Affiliation(s)
- Fazli Sattar
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Zelin Feng
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Hanxun Zou
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Hebo Ye
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Yi Zhang
- School of Materials Science and Energy Engineering
- Foshan University
- Foshan
- China
| | - Lei You
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
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18
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Lyons DJM, Empel C, Pace DP, Dinh AH, Mai BK, Koenigs RM, Nguyen TV. Tropolonate Salts as Acyl-Transfer Catalysts under Thermal and Photochemical Conditions: Reaction Scope and Mechanistic Insights. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03702] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Demelza J. M. Lyons
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Claire Empel
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
- Institute of Organic Chemistry, RWTH Aachen, Aachen D52074, Germany
| | - Domenic P. Pace
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - An H. Dinh
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Binh Khanh Mai
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Rene M. Koenigs
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
- Institute of Organic Chemistry, RWTH Aachen, Aachen D52074, Germany
| | - Thanh Vinh Nguyen
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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19
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Casper LA, Wursthorn L, Geppert M, Roser P, Linseis M, Drescher M, Winter RF. 4-Ferrocenylphenyl-Substituted Tritylium Dyes with Open and Interlinked C +Ar 2 Entities: Redox Behavior, Electrochromism, and a Quantitative Study of the Dimerization of Their Neutral Radicals. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00486] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Larissa A. Casper
- Department of Chemistry, Universität Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
| | - Lukas Wursthorn
- Department of Chemistry, Universität Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
| | - Marcel Geppert
- Department of Chemistry, Universität Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
| | - Patrick Roser
- Department of Chemistry, Universität Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
| | - Michael Linseis
- Department of Chemistry, Universität Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
| | - Malte Drescher
- Department of Chemistry, Universität Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
| | - Rainer F. Winter
- Department of Chemistry, Universität Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
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20
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Yan L, Xie Y, Li J, Zhu W. A red fluorogen: AIEE characteristic, photoluminescence mechanism and its application as chemosensor for ClO . SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 228:117794. [PMID: 31757700 DOI: 10.1016/j.saa.2019.117794] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 11/10/2019] [Accepted: 11/11/2019] [Indexed: 06/10/2023]
Abstract
Red material is widely used in many fields because it has a lot of high performances such as strong penetrability, little trauma to cell and tissue, easy to prepare, and low background interference. However, a lot of organic materials were troubled with the aggregation caused emission quenching (ACQ) effect, which really limits their practical applications. In contrast, aggregation induced emission (AIE) and aggregation-induced enhanced emission (AIEE) effects provide an efficient method to break the obstacle of ACQ effect. Herein, a red light molecule was developed by integrating cyano and alkyl sulfide moieties. Its photoluminescence mechanism was further revealed by fluorescence spectrum, density functional theory (DFT) and X-ray single crystal diffraction, respectively. It is found that this compound has good planar construction and has no rotatory unit, it showed typical AIEE performance because of intramolecular D-π-A structure and the formation of J-aggregation. This molecular design principle may be able to offer an effective strategy to exploit red AIE/AIEE organic materials. Meanwhile, this fluorogen showed excellent response capability to ClO- including high selectivity and sensitivity, and cell imaging performance.
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Affiliation(s)
- Liqiang Yan
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, Guangxi 541004, PR China.
| | - Ya Xie
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, Guangxi 541004, PR China
| | - Jianping Li
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, Guangxi 541004, PR China.
| | - Wenyuan Zhu
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, Guangxi 541004, PR China.
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21
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Omoregbee K, Luc KNH, Dinh AH, Nguyen TV. Tropylium-promoted prenylation reactions of phenols in continuous flow. J Flow Chem 2020. [DOI: 10.1007/s41981-020-00082-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Hussein MA, Tran UPN, Huynh VT, Ho J, Bhadbhade M, Mayr H, Nguyen TV. Halide Anion Triggered Reactions of Michael Acceptors with Tropylium Ion. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201910578] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
| | | | | | - Junming Ho
- School of Chemistry UNSW Sydney Australia
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23
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Xu J, Gao Y, Li Z, Liu J, Guo T, Zhang L, Wang H, Zhang Z, Guo K. Chlorotropylium Promoted Conversions of Oximes to Amides and Nitriles. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901537] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jiaxi Xu
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; 30 Puzhu Road South 211816 Nanjing China
| | - Yu Gao
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; 30 Puzhu Road South 211816 Nanjing China
| | - Zhenjiang Li
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; 30 Puzhu Road South 211816 Nanjing China
| | - Jingjing Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; 30 Puzhu Road South 211816 Nanjing China
| | - Tianfo Guo
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; 30 Puzhu Road South 211816 Nanjing China
| | - Lei Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; 30 Puzhu Road South 211816 Nanjing China
| | - Haixin Wang
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; 30 Puzhu Road South 211816 Nanjing China
| | - Zhihao Zhang
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; 30 Puzhu Road South 211816 Nanjing China
| | - Kai Guo
- State Key Laboratory of Materials-Oriented Chemical Engineering; College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; 30 Puzhu Road South 211816 Nanjing China
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24
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Hussein MA, Tran UPN, Huynh VT, Ho J, Bhadbhade M, Mayr H, Nguyen TV. Halide Anion Triggered Reactions of Michael Acceptors with Tropylium Ion. Angew Chem Int Ed Engl 2019; 59:1455-1459. [DOI: 10.1002/anie.201910578] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 09/27/2019] [Indexed: 12/27/2022]
Affiliation(s)
| | | | | | - Junming Ho
- School of Chemistry UNSW Sydney Australia
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25
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Guo Y, Nguyen TV, Koenigs RM. Norcaradiene Synthesis via Visible-Light-Mediated Cyclopropanation Reactions of Arenes. Org Lett 2019; 21:8814-8818. [PMID: 31617724 DOI: 10.1021/acs.orglett.9b03453] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Cyclopropanation reactions of carbenes with arenes provide a straightforward pathway to norcaradienes or cycloheptatrienes. This reaction normally requires harsh reaction conditions or transition-metal catalysts. In this report, we describe the metal-free visible-light photolysis of aryl diazoacetates in aromatic solvents, which provides access to the norcaradiene ring system in a highly regio- and stereoselective manner. The mild reaction conditions of this approach also allow chemoselective cyclopropanation of substituted arenes without competing C-H functionalization reactions.
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Affiliation(s)
- Yujing Guo
- Institute of Organic Chemistry , RWTH Aachen University , Landoltweg 1 , 52074 Aachen , Germany
| | - Thanh Vinh Nguyen
- School of Chemistry , University of New South Wales , Sydney 2052 , Australia
| | - Rene M Koenigs
- Institute of Organic Chemistry , RWTH Aachen University , Landoltweg 1 , 52074 Aachen , Germany
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26
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Vargová D, Pérez JM, Harutyunyan SR, Šebesta R. Trapping of chiral enolates generated by Lewis acid promoted conjugate addition of Grignard reagents to unreactive Michael acceptors by various electrophiles. Chem Commun (Camb) 2019; 55:11766-11769. [PMID: 31513177 DOI: 10.1039/c9cc05041h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here we show trapping of chiral enolates with carbenium ions, Michael acceptors, and bromine. Silyl ketene aminals, disilyl acetals, and aza-enolates were obtained via Lewis acid mediated enantioselective conjugate addition of Grignard reagents to unsaturated amides, carboxylic acids and alkenyl heterocycles.
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Affiliation(s)
- Denisa Vargová
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynska dolina, Ilkovičova 6, 84215 Bratislava, Slovakia. and Stratingh Institute for Chemistry, Rijksuniversiteit Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Juana M Pérez
- Stratingh Institute for Chemistry, Rijksuniversiteit Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Syuzanna R Harutyunyan
- Stratingh Institute for Chemistry, Rijksuniversiteit Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Radovan Šebesta
- Comenius University in Bratislava, Faculty of Natural Sciences, Department of Organic Chemistry, Mlynska dolina, Ilkovičova 6, 84215 Bratislava, Slovakia.
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27
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Shao X, Tian L, Wang Y. C-N Coupling of Azoles or Imides with Carbocations Generated by Electrochemical Oxidation. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900714] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xiaoqing Shao
- Institute of Advanced Synthesis (IAS); School of Chemistry and Molecular Engineering (SCME); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University; 30 South Puzhu Road 211816 Nanjing China
| | - Lifang Tian
- Institute of Advanced Synthesis (IAS); School of Chemistry and Molecular Engineering (SCME); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University; 30 South Puzhu Road 211816 Nanjing China
| | - Yahui Wang
- Institute of Advanced Synthesis (IAS); School of Chemistry and Molecular Engineering (SCME); Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM); Nanjing Tech University; 30 South Puzhu Road 211816 Nanjing China
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28
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Wen C, Yu G, Ou Y, Wang X, Zhang K, Chen Q. DDQ-promoted C(sp3) H phosphorylation of cycloheptatriene. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.04.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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29
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Crocker RD, Zhang B, Pace DP, Wong WWH, Nguyen TV. Tetrabenzo[5.7]fulvalene: a forgotten aggregation induced-emission luminogen. Chem Commun (Camb) 2019; 55:11591-11594. [DOI: 10.1039/c9cc06289k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tetrabenzo[5.7]fulvalene has been proven to be an outstanding aggregation-induced emission fluorophore.
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Affiliation(s)
| | - Bolong Zhang
- ARC Centre of Excellence in Exciton Science
- Bio21 Institute and School of Chemistry
- University of Melbourne
- Australia
| | - Domenic P. Pace
- School of Chemistry
- University of New South Wales
- Sydney
- Australia
| | - Wallace W. H. Wong
- ARC Centre of Excellence in Exciton Science
- Bio21 Institute and School of Chemistry
- University of Melbourne
- Australia
| | - Thanh V. Nguyen
- School of Chemistry
- University of New South Wales
- Sydney
- Australia
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30
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Tran UPN, Oss G, Breugst M, Detmar E, Pace DP, Liyanto K, Nguyen TV. Carbonyl–Olefin Metathesis Catalyzed by Molecular Iodine. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03769] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Uyen P. N. Tran
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Giulia Oss
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Martin Breugst
- Department für Chemie, Universität zu Köln, Greinstraße
4, 50939 Köln, Germany
| | - Eric Detmar
- Department für Chemie, Universität zu Köln, Greinstraße
4, 50939 Köln, Germany
| | - Domenic P. Pace
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Kevin Liyanto
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Thanh V. Nguyen
- School of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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31
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Hussein MA, Huynh VT, Hommelsheim R, Koenigs RM, Nguyen TV. An efficient method for retro-Claisen-type C–C bond cleavage of diketones with tropylium catalyst. Chem Commun (Camb) 2018; 54:12970-12973. [DOI: 10.1039/c8cc07329e] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We report a new convenient and efficient method utilizing the tropylium ion as a mild and environmentally friendly organocatalyst to mediate retro-Claisen-type reactions.
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Affiliation(s)
- M. A. Hussein
- School of Chemistry
- University of New South Wales
- Sydney
- Australia
| | - V. T. Huynh
- School of Chemistry
- University of Sydney
- Australia
| | - R. Hommelsheim
- Institute of Organic Chemistry
- RWTH Aachen University
- Germany
| | - R. M. Koenigs
- Institute of Organic Chemistry
- RWTH Aachen University
- Germany
| | - T. V. Nguyen
- School of Chemistry
- University of New South Wales
- Sydney
- Australia
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