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Irgashev RA, Steparuk AS. A general approach to construct selenopheno[3,2- b]indole-cored molecules using Fischer indolization. Org Biomol Chem 2024. [PMID: 39016603 DOI: 10.1039/d4ob00788c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
A wide series of various selenopheno[3,2-b]indole-based compounds, including 2-aryl-substituted selenopheno[3,2-b]indoles as well as derivatives of benzo[4,5]selenopheno[3,2-b]indole, pyrido[3',2':4,5]selenopheno[3,2-b]indole, pyrazino[2',3':4,5]selenopheno[3,2-b]indole and chromeno[3',4':4,5]selenopheno[3,2-b]indol-6-one, were prepared from the appropriate 3-aminoselenophen-2-carboxylates via a one-pot two-step procedure based on the Fischer indole synthesis. The present synthetic strategy includes the conversion of 3-aminoselenophen-2-carboxylates into 2-unsubstituted 3-aminoselenophenes, their C-2 protonation to form selenophen-3(2H)-iminium cations, and the reaction of these iminium intermediates with arylhydrazines to obtain arylhydrazones of selenophen-3(2H)-ones followed by their Fischer indolization affording selenopheno[3,2-b]indole molecules.
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Affiliation(s)
- Roman A Irgashev
- Postovsky Institute of Organic Synthesis, Ural Division, Russian Academy of Sciences, S. Kovalevskoy Str., 22, Ekaterinburg, 620990, Russia.
| | - Alexander S Steparuk
- Postovsky Institute of Organic Synthesis, Ural Division, Russian Academy of Sciences, S. Kovalevskoy Str., 22, Ekaterinburg, 620990, Russia.
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Irgashev RA, Kazin NA, Rusinov GL. An Approach to the Construction of Benzofuran-thieno[3,2- b]indole-Cored N,O,S-Heteroacenes Using Fischer Indolization. ACS OMEGA 2021; 6:32277-32284. [PMID: 34870048 PMCID: PMC8638309 DOI: 10.1021/acsomega.1c05239] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 10/28/2021] [Indexed: 05/28/2023]
Abstract
A series of 6H-benzofuro[2',3':4,5]thieno[3,2-b]indoles were readily synthesized from methyl 3-aminothieno[3,2-b]benzofuran-2-carboxylates using a one-pot procedure with Fischer indolization as the key step. At the same time, 3-aminothieno[3,2-b]benzofuran-2-carboxylates were prepared from 3-chlorobenzofuran-2-carbaldehydes in three steps, including replacement of the Cl atom at the C-3 position of these starting substrates onto the -SCH2CO2Me moiety, conversion of the CHO group at the C-2 position into the CN group, followed by base-promoted cyclization of the formed carbonitrile. The present route was elaborated by us because we failed to obtain directly the desired 3-aminothiophene-2-carboxylate by reaction of 3-chlorobenzofuran-2-carbonitrile with methyl thioglycolate in the presence of various bases. In turn, 3-chlorobenzofuran-2-carbaldehydes were prepared from benzofuran-3(2H)-ones following the Vilsmeier-Haack-Arnold reaction.
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Affiliation(s)
- Roman A. Irgashev
- Postovsky
Institute of Organic Synthesis, Ural Division, Russian Academy of
Sciences, S. Kovalevskoy Str., 22, Ekaterinburg 620990, Russia
- Ural
Federal University Named after the First President of Russia B. N.
Yeltsin, Mira Str., 19, Ekaterinburg 620002, Russia
| | - Nikita A. Kazin
- Postovsky
Institute of Organic Synthesis, Ural Division, Russian Academy of
Sciences, S. Kovalevskoy Str., 22, Ekaterinburg 620990, Russia
| | - Gennady L. Rusinov
- Postovsky
Institute of Organic Synthesis, Ural Division, Russian Academy of
Sciences, S. Kovalevskoy Str., 22, Ekaterinburg 620990, Russia
- Ural
Federal University Named after the First President of Russia B. N.
Yeltsin, Mira Str., 19, Ekaterinburg 620002, Russia
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One-pot approach to construct benzo[4,5]thieno[3,2-b]indoles, pyrido[3′,2’:4,5]thieno[3,2-b]indoles and pyrazino[2′,3’:4,5]thieno[3,2-b]indoles based on the Fischer indole synthesis. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131723] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Huang YF, Chung CL, Prakoso SP, Ciou GT, Wang CK, Chen YS, Lai BH, Wong KT, Wang CL. Influence of Molecular Symmetry and Terminal Substituents on the Morphology and OFET Characteristics of S,N-Heteropentacenes. ACS APPLIED MATERIALS & INTERFACES 2020; 12:40572-40580. [PMID: 32791830 DOI: 10.1021/acsami.0c09520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Many heteroacenes have been extensively studied to improve device performances; however, the morphological effects stemmed from the chemical modification on a multiscale remain less explored. In this research, five axisymmetric S,N-heteropentacenes (DTPT, DTPT-Ph, DTPT-CN, DTPT-PYCN, and DTPT-BTCN) are studied to reveal the influences of molecular symmetry and end-capping substituents on the structure-property relationship, the thermal stability, crystallization behavior, film morphology, and OFET performance. Phase behavior was probed by differential scanning calorimetry (DSC), while the quality of the crystal array and structural details was investigated by optical microscopy (OM) and grazing-incidence wide-angle X-ray scattering (GIWAXS). The analytic results reveal that (1) the parent axisymmetric S,N-heteropentacene, DTPT, is hard to crystallize, which hinders the preparation of high-quality crystal arrays for the OFET application. (2) The incorporation of π-conjugated electron-withdrawing (π-EW) endcaps that provide extended conjugation length and enhanced molecular polarity is required to form oriented crystal arrays to deliver reasonable OFET characteristics. (3) The π-EW endcaps with conformational freedom, such as -BTCN, due to the asymmetric feature of benzothiadiazole (BT), can hinder bulk phase crystallization and cause conformational disorder in the crystal array. Hence, the tradeoff of introducing the end-substituents to reinforce the poor crystalline nature of S,N-heteroacenes should be carefully considered.
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Affiliation(s)
- Yi-Fan Huang
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Chin-Lung Chung
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Suhendro Purbo Prakoso
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
- Institute of Chemistry, Academia Sinica, Taipei 10617, Taiwan
| | - Guan-Ting Ciou
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Chun-Kai Wang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Yi-Sheng Chen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Bo-Han Lai
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
| | - Ken-Tsung Wong
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
- Institute of Atomic and Molecular Science, Academia Sinica, Taipei 10617, Taiwan
| | - Chien-Lung Wang
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 30010, Taiwan
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