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Janecký L, Markos A, Klepetářová B, Beier P. Lewis-Acid-Mediated Intramolecular Cyclization of 4-Aryl-5-allyl-1,2,3-triazoles to Substituted Cyclopentene Derivatives. J Org Chem 2023; 88:1155-1167. [PMID: 36580673 DOI: 10.1021/acs.joc.2c02685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
4-Aryl-5-allyl-N-fluoroalkyl-1,2,3-triazoles available by a three-component reaction of fluoroalkyl azides, copper acetylides, and allyl halides underwent aluminum halide-mediated transformation to N-(4-halo-2-aryl-cyclopentenyl) imidoyl halides by cyclization of vinyl cation intermediates, followed by halide capture. Utilization of the cyclic products was demonstrated by the synthesis of N-alkenyl amides, amidines, isoquinolines, and tetrazoles or by the subsequent modification of the cyclopentene ring.
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Affiliation(s)
- Lukáš Janecký
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague, Czech Republic.,Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43 Prague 2, Czech Republic
| | - Athanasios Markos
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Blanka Klepetářová
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Petr Beier
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague, Czech Republic
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Greiner LC, Arichi N, Inuki S, Ohno H. Gold(I)-Catalyzed Benzylic C(sp 3 )-H Functionalizations: Divergent Synthesis of Indole[a]- and [b]-Fused Polycycles. Angew Chem Int Ed Engl 2023; 62:e202213653. [PMID: 36255174 DOI: 10.1002/anie.202213653] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/17/2022] [Accepted: 10/17/2022] [Indexed: 11/05/2022]
Abstract
Phenyl azides substituted by an (alkylphenyl)ethynyl group facilitate benzylic sp3 (C-H) functionalization in the presence of a JohnPhosAu catalyst, resulting in indole-fused tetra- and pentacycles via divergent N- or C-cyclization. The chemoselectivity is influenced depending on the counter-anion, the electron density of the α-imino gold(I) carbene, and the alkyl groups stabilizing the benzylic carbocation originating from a 1,5-hydride shift. An isotopic labeling experiment demonstrates the involvement of an indolylgold(I) species resulting from a tautomerization that is much faster than the deauration. The formation of a benzylic sp3 (C-H) functionalization leading to an indole-fused seven-membered ring is also demonstrated.
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Affiliation(s)
- Luca C Greiner
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Norihito Arichi
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Shinsuke Inuki
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences, Kyoto University Sakyo-ku, Kyoto, 606-8501, Japan
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Elwahy AHM, Shaaban MR, Abdelhamid IA. Recent Advances in the Functionalization of Azulene Through Rh‐, Ir‐, Ru‐, Au‐, Fe‐, Ni‐, and Cu‐catalyzed Reactions. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6772] [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)
| | - Mohamed R. Shaaban
- Chemistry Department, Faculty of Applied Sciences, Makkah Almukkarramah, Umm AL‐Qura University Saudi Arabia
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Komatsu H, Ikeuchi T, Tsuno H, Arichi N, Yasui K, Oishi S, Inuki S, Fukazawa A, Ohno H. Construction of Tricyclic Nitrogen Heterocycles by a Gold(I)‐Catalyzed Cascade Cyclization of Allenynes and Application to Polycyclic π‐Electron Systems. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111267] [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)
- Hiroki Komatsu
- Graduate School of Pharmaceutical Sciences Kyoto University, Sakyo-ku Kyoto 606-8501 Japan
| | - Takaya Ikeuchi
- Graduate School of Pharmaceutical Sciences Kyoto University, Sakyo-ku Kyoto 606-8501 Japan
| | - Hitomi Tsuno
- Graduate School of Pharmaceutical Sciences Kyoto University, Sakyo-ku Kyoto 606-8501 Japan
| | - Norihito Arichi
- Graduate School of Pharmaceutical Sciences Kyoto University, Sakyo-ku Kyoto 606-8501 Japan
| | - Kosuke Yasui
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS) Institute for Advanced Study Kyoto University, Sakyo-ku Kyoto 606-8501 Japan
| | - Shinya Oishi
- Graduate School of Pharmaceutical Sciences Kyoto University, Sakyo-ku Kyoto 606-8501 Japan
| | - Shinsuke Inuki
- Graduate School of Pharmaceutical Sciences Kyoto University, Sakyo-ku Kyoto 606-8501 Japan
| | - Aiko Fukazawa
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS) Institute for Advanced Study Kyoto University, Sakyo-ku Kyoto 606-8501 Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences Kyoto University, Sakyo-ku Kyoto 606-8501 Japan
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Komatsu H, Ikeuchi T, Tsuno H, Arichi N, Yasui K, Oishi S, Inuki S, Fukazawa A, Ohno H. Construction of Tricyclic Nitrogen Heterocycles by a Gold(I)-Catalyzed Cascade Cyclization of Allenynes and Application to Polycyclic π-Electron Systems. Angew Chem Int Ed Engl 2021; 60:27019-27025. [PMID: 34590766 DOI: 10.1002/anie.202111267] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Indexed: 11/11/2022]
Abstract
A novel approach to the direct construction of tricyclic nitrogen heterocycles based on gold-catalyzed cascade cyclization of aminoallenynes is described. The expected biscyclization reaction of hydroxyisobutyryl-protected aminoallenynes was efficiently promoted by a catalytic amount of BrettPhosAuNTf2 in the presence of iPrOH to produce 1,2-dihydrobenzo[cd]indole derivatives in good yields. When the reaction was combined with Friedel-Crafts acylation or palladium-catalyzed N-arylation, the resulting tricyclic products were efficiently converted into nitrogen-containing polycyclic aromatic compounds (N-PACs) with highly conjugated π-electron systems. A newly obtained hexacyclic indolium salt showed characteristic concentration-dependent absorption and emission properties.
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Affiliation(s)
- Hiroki Komatsu
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Takaya Ikeuchi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hitomi Tsuno
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Norihito Arichi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Kosuke Yasui
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Institute for Advanced Study, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Shinya Oishi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Shinsuke Inuki
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Aiko Fukazawa
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Institute for Advanced Study, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, 606-8501, Japan
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6
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Affiliation(s)
- José M. Alonso
- Departamento de Química Orgánica Universidad Complutense de Madrid Avda. Complutense s/n 28040 Madrid Spain
| | - María Paz Muñoz
- School of Chemistry University of East Anglia Earlham Road 4 7TJ Norwich, NR UK
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Mubarok H, Lee W, Lee T, Jung J, Yoo S, Lee MH. Impact of Boron Acceptors on the TADF Properties of Ortho-Donor-Appended Triarylboron Emitters. Front Chem 2020; 8:538. [PMID: 32714897 PMCID: PMC7344311 DOI: 10.3389/fchem.2020.00538] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 05/26/2020] [Indexed: 01/29/2023] Open
Abstract
We report the impact of boron acceptors on the thermally activated delayed fluorescence (TADF) properties of ortho-donor-appended triarylboron compounds. Different boryl acceptor moieties, such as 9-boraanthryl (1), 10H-phenoxaboryl (2), and dimesitylboryl (BMes2, 3) groups have been introduced into an ortho donor (D)–acceptor (A) backbone structure containing a 9,9-diphenylacridine (DPAC) donor. X-ray crystal diffraction and NMR spectroscopy evidence the presence of steric congestion around the boron atom along with a highly twisted D–A structure. A short contact of 2.906 Å between the N and B atoms, which is indicative of an N → B nonbonding electronic interaction, is observed in the crystal structure of 2. All compounds are highly emissive (PLQYs = 90–99%) and display strong TADF properties in both solution and solid state. The fluorescence bands of cyclic boryl-containing 1 and 2 are substantially blue-shifted compared to that of BMes2-containing 3. In particular, the PL emission bandwidths of 1 and 2 are narrower than that of 3. High-efficiency TADF-OLEDs are realized using 1–3 as emitters. Among them, the devices based on the cyclic boryl emitters exhibit pure blue electroluminescence (EL) and narrower EL bands than the device with 3. Furthermore, the device fabricated with emitter 1 achieves a high external quantum efficiency of 25.8%.
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Affiliation(s)
- Hanif Mubarok
- Department of Chemistry, University of Ulsan, Ulsan, South Korea
| | - Woochan Lee
- School of Electrical Engineering, KAIST, Daejeon, South Korea
| | - Taehwan Lee
- Department of Chemistry, University of Ulsan, Ulsan, South Korea
| | - Jaehoon Jung
- Department of Chemistry, University of Ulsan, Ulsan, South Korea
| | - Seunghyup Yoo
- School of Electrical Engineering, KAIST, Daejeon, South Korea
| | - Min Hyung Lee
- Department of Chemistry, University of Ulsan, Ulsan, South Korea
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