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Ganaie BA, Balasubramani A, Bhat BA, Mehta G. Indeno-Annulation of o-Formyl-Ynones, o-Bis-Ynones, and p-Bis- o-Formyl-Ynones with Dimethyl Acetone-1,3-Dicarboxylate: One Flask Cascade Synthesis of Functionally Endowed 9-Fluorenols and Indeno[1,2- b]fluorenols. J Org Chem 2023; 88:11637-11649. [PMID: 37558646 DOI: 10.1021/acs.joc.3c00958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
A mild, scalable, one-pot access to multifunctional 9-fluorenols from o-formyl-ynones and o-bis-ynones on reaction with dimethylacetone-1,3-dicarboxyate through tandem Michael addition-Aldol condensation cascade has been conceptualized and executed. The scope and utility of this synthetic approach have been further amplified for one-pot entry into functionally enhanced, higher order fluorenols like pentacyclic indeno[1,2-b]fluorene-6,12-diols and further to indeno[1,2-b]fluorene-6,12-diones through the implementation of "double indeno-annulation" tactic on p-bis-o-formyl ynones and dimethylacetone-1,3-dicarboxylate. Besides several green attributes, the current approach is also compatible with the emerging time and energy economy features and is a swift gateway to build complexity.
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Affiliation(s)
| | | | - Bilal A Bhat
- Natural Products & Medicinal Chemistry, CSIR-Indian Institute and Integrative Medicine Sanatnagar, Srinagar 190005, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Goverdhan Mehta
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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Nishiuchi T, Makihara Y, Kishi R, Sato H, Kubo T. Stacked antiaromaticity in the π‐congested space between the aromatic rings in the anthracene dimer. J PHYS ORG CHEM 2022. [DOI: 10.1002/poc.4451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tomohiko Nishiuchi
- Department of Chemistry, Graduate School of Science Osaka University Toyonaka Osaka Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives, (ICS‐OTRI) Osaka University Suita Osaka Japan
| | - Yuta Makihara
- Department of Chemistry, Graduate School of Science Osaka University Toyonaka Osaka Japan
| | - Ryohei Kishi
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives, (ICS‐OTRI) Osaka University Suita Osaka Japan
- Department of Materials Engineering Science, Graduate School of Engineering Science Osaka University Toyonaka Osaka Japan
- Research Center for Solar Energy Chemistry (RCSEC) and Center for Quantum Information and Quantum Biology (QIQB) Osaka University Toyonaka Osaka Japan
| | | | - Takashi Kubo
- Department of Chemistry, Graduate School of Science Osaka University Toyonaka Osaka Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives, (ICS‐OTRI) Osaka University Suita Osaka Japan
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Nishiuchi T, Aibara S, Yamakado T, Kimura R, Saito S, Sato H, Kubo T. Sterically Frustrated Aromatic Enes with Various Colors Originating from Multiple Folded and Twisted Conformations in Crystal Polymorphs. Chemistry 2022; 28:e202200286. [PMID: 35333427 DOI: 10.1002/chem.202200286] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Indexed: 12/11/2022]
Abstract
Overcrowded ethylenes composed of 10-methyleneanthrone and two bulky aromatic rings contain a twisted carbon-carbon double (C=C) bond as well as a folded anthrone unit. As such, they are unique frustrated aromatic enes (FAEs). Various colored crystals of these FAEs, obtained in different solvents, correspond to multiple metastable conformations of the FAEs with various twist and fold angles of the C=C bond, as well as various dihedral angles of attached aryl units with respect to the C=C bond. The relationships between color and these parameters associated with conformational features around the C=C bond were elucidated in experimental and computational studies. Owing to the fact that they are separated by small energy barriers, the variously colored conformations in the FAE crystal change in response to various external stimuli, such as mechanical grinding, hydrostatic pressure and thermal heating.
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Affiliation(s)
- Tomohiko Nishiuchi
- Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Seito Aibara
- Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Takuya Yamakado
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake, Sakyo, Kyoto, 606-8502, Japan
| | - Ryo Kimura
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake, Sakyo, Kyoto, 606-8502, Japan
| | - Shohei Saito
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake, Sakyo, Kyoto, 606-8502, Japan
| | - Hiroyasu Sato
- Rigaku Corporation, 3-9-12 Matsubara, Akishima, Tokyo, 196-8666, Japan
| | - Takashi Kubo
- Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama, Toyonaka, Osaka, 560-0043, Japan.,Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives, ICS-OTRI), Osaka University, Suita, Osaka, 565-0871, Japan
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Meindl B, Pfennigbauer K, Stöger B, Heeney M, Glöcklhofer F. Double Ring-Closing Approach for the Synthesis of 2,3,6,7-Substituted Anthracene Derivatives. J Org Chem 2020; 85:8240-8244. [PMID: 32447951 DOI: 10.1021/acs.joc.0c00826] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A method for the synthesis of 2,3,6,7-substituted anthracene derivatives, one of the most challenging anthracene substitution patterns to obtain, is presented. The method is exemplified by the preparation of 2,3,6,7-anthracenetetracarbonitrile and employs a newly developed, stable, protected 1,2,4,5-benzenetetracarbaldehyde as the precursor. The precursor can be obtained in two scalable synthetic steps from 2,5-dibromoterephthalaldehyde and is converted into the anthracene derivative by a double intermolecular Wittig reaction under very mild conditions, followed by a deprotection and intramolecular double ring-closing condensation reaction.
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Affiliation(s)
- Birgit Meindl
- Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9/163, Vienna 1060, Austria
| | - Katharina Pfennigbauer
- Department of Chemistry and Centre for Processable Electronics, Imperial College London, Molecular Sciences Research Hub, 80 Wood Lane, London W12 0BZ, United Kingdom
| | - Berthold Stöger
- X-Ray Center, TU Wien, Getreidemarkt 9, Vienna 1060, Austria
| | - Martin Heeney
- Department of Chemistry and Centre for Processable Electronics, Imperial College London, Molecular Sciences Research Hub, 80 Wood Lane, London W12 0BZ, United Kingdom
| | - Florian Glöcklhofer
- Department of Chemistry and Centre for Processable Electronics, Imperial College London, Molecular Sciences Research Hub, 80 Wood Lane, London W12 0BZ, United Kingdom
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Martínez-Abadía M, Antonicelli G, Zuccatti E, Atxabal A, Melle-Franco M, Hueso LE, Mateo-Alonso A. Synthesis and Properties of a Twisted and Stable Tetracyano-Substituted Tetrabenzoheptacene. Org Lett 2017; 19:1718-1721. [PMID: 28291368 DOI: 10.1021/acs.orglett.7b00493] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An approach for the synthesis of pyrene-fused acenes that allows the introduction of electron-withdrawing cyano groups in key positions that simultaneously (i) induce twists in the aromatic framework and (ii) stabilize the LUMO level is reported. This combination of steric and electronic features provide a twisted, stable, and n-type tetrabenzoheptacene as confirmed by a combination of theoretical calculations and optical, electrochemical, thermal, and electrical characterization.
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Affiliation(s)
- Marta Martínez-Abadía
- POLYMAT, University of the Basque Country UPV/EHU . Avenida de Tolosa 72, E-20018 Donostia-San Sebastián, Spain
| | - Gabriella Antonicelli
- POLYMAT, University of the Basque Country UPV/EHU . Avenida de Tolosa 72, E-20018 Donostia-San Sebastián, Spain
| | | | - Ainhoa Atxabal
- CIC Nanogune . Avenida de Tolosa 76, E-20018 Donostia-San Sebastián, Spain
| | - Manuel Melle-Franco
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro , 3810-193 Aveiro, Portugal
| | - Luis E Hueso
- CIC Nanogune . Avenida de Tolosa 76, E-20018 Donostia-San Sebastián, Spain.,Ikerbasque, Basque Foundation for Science , Bilbao, Spain
| | - Aurelio Mateo-Alonso
- POLYMAT, University of the Basque Country UPV/EHU . Avenida de Tolosa 72, E-20018 Donostia-San Sebastián, Spain.,Ikerbasque, Basque Foundation for Science , Bilbao, Spain
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Nishiuchi T, Iyoda M. Bent π-conjugated systems composed of three-dimensional benzoannulenes. CHEM REC 2015; 15:329-46. [PMID: 25612235 DOI: 10.1002/tcr.201402079] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Indexed: 01/06/2023]
Abstract
This article describes bent π-conjugated systems composed of alternating o-phenylene and Z-vinylene units. all-Z-[n]Benzo[4n]annulenes are higher homologues of dibenzocyclooctatetraene (DBCOT) with a concave π system, and attempts were made to convert [20]- and [24]annulenes having partial belt structures of fullerenes and carbon nanotubes into [10]- and [12]phenacenes. A bent π-conjugated system composed of two DBCOT units showed dynamic syn-anti equilibrium in solution and behaved as dynamic molecular tweezers (DMTs). The syn isomers of the DMTs formed blue charge-transfer complexes with DDQ in solution, and this complexation and color change were applied to thermochromism. Furthermore, DMTs having two CN groups on each COT ring exhibited crystalline-state emission in the presence of solvent molecules, although almost no emission was observed in solution or the solid state. Based on this crystalline-state emission, a vapochromic system was established. The multifunctional properties of DMTs caused by the flexibility of the nonplanar π system are summarized.
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Affiliation(s)
- Tomohiko Nishiuchi
- Department of Chemistry, Graduate School of Science, Osaka University, Machikaneyama 1-1, Toyonaka, Osaka, 560-0043, Japan
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