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Krishnan R A, Babu SA, Ravi NP, Thulasi S, John J. Base-Mediated Annulation of Electrophilic Benzothiophene with Naphthols and Phenols: Accessing Benzothiophene-Fused Heteroacenes. J Org Chem 2022; 87:8017-8027. [PMID: 35666573 DOI: 10.1021/acs.joc.2c00645] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A base-mediated annulation of 2-nitrobenzothiophenes with naphthols was realized for the synthesis of hitherto unknown class of heteroacenes, namely benzothieno[2,3-b]naphthofurans. By using naphthols with a hydroxyl group positioned at 1st or 2nd position, we could synthesize two positional isomers, benzothieno[2,3-b]naphtho[2,1-d]furans or benzothieno[2,3-b]naphtho[2,3-d]furans. The annulation was found to be general with a range of substituted 2-nitrobenzothiophenes and naphthols. This heteroannulation of benzothiophene was extended using a range of phenols affording the corresponding benzothieno[2,3-b]benzofurans in moderate yields. The basic photophysical properties of these heteroacenes were evaluated, and we also demonstrated the applicability of this annulation on the gram scale.
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Affiliation(s)
- Akhil Krishnan R
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
| | - Sheba Ann Babu
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Nitha P Ravi
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sreeja Thulasi
- Department of Chemistry, T. K. Madhava Memorial College, Nangiarkulangara, Haripad 690513, India
| | - Jubi John
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Huang J. Organic Transformation of Benzothiophenes by C−S Bond Cleavage Beyond Reductive Desulfurization. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jirong Huang
- School of Pharmacy Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 Hubei Province People's Republic of China
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Krishnan R A, Babu SA, P R N, Krishnan J, John J. Synthesis of Benzothienobenzofurans via Annulation of Electrophilic Benzothiophenes with Phenols. Org Lett 2021; 23:1814-1819. [PMID: 33591196 DOI: 10.1021/acs.orglett.1c00219] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We have developed a metal-free, mild, and green synthetic route toward benzothieno[3,2-b]benzofurans by the annulation of 3-nitrobenzothiophene with phenols. The reaction was found to be general with a range of substituted phenols. In addition, we could extend the methodology for the synthesis of pentacenes and could demonstrate the synthesis in gram-scale. Moreover, we extended the strategy for the synthesis of benzothieno[2,3-b]benzofurans by starting from 2-nitrobenzothiophenes.
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Affiliation(s)
- Akhil Krishnan R
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
| | - Sheba Ann Babu
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Nitha P R
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Jagadeesh Krishnan
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
| | - Jubi John
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Petrillo G, Benzi A, Bianchi L, Maccagno M, Pagano A, Tavani C, Spinelli D. Recent advances in the use of conjugated nitro or dinitro-1,3-butadienes as building-blocks for the synthesis of heterocycles. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152297] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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3-Aryl-4-nitrobenzothiochromans S,S-dioxide: From Calcium-Channel Modulators Properties to Multidrug-Resistance Reverting Activity. Molecules 2020; 25:molecules25051056. [PMID: 32120861 PMCID: PMC7179187 DOI: 10.3390/molecules25051056] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/20/2020] [Accepted: 02/23/2020] [Indexed: 11/16/2022] Open
Abstract
Our research groups have been involved for many years in studies aimed at identifying new active organic compounds endowed with pharmacological properties. In this work, we focused our attention on the evaluation of cardiovascular and molecular drug resistance (MDR) reverting activities of some nitrosubstituted sulphur-containing heterocycles. Firstly, we have examined the effects of 4-nitro-3-(4-methylphenyl)-3,6-dihydro-2H-thiopyran S,S-dioxide 5, and have observed no activity. Then we have extended our investigation to the 3-aryl-4-nitrobenzothiochromans S,S-dioxide 6 and 7, and have observed an interesting biological profile. Cardiovascular activities were assessed for all compounds using ex vivo studies, while the MDR reverting effect was evaluated only for selected compounds using tumor cell lines. All compounds were shown to affect cardiovascular parameters. Compound 7i exerted the most effect on negative inotropic activity, while 6d and 6f could be interesting molecules for the development of more active ABCB1 inhibitors. Both 6 and 7 represent structures of large possible biological interest, providing a scaffold for the identification of new ABCB1 inhibitors.
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Pagano A, Mancinelli M, Bianchi L, Giorgi G, Maccagno M, Petrillo G, Tavani C. Nitrobutadienes as powerful benzannulating agents: An unprecedented easy access to rare nitroindoles. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.06.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Tavani C, Bianchi L, Giorgi G, Maccagno M, Petrillo G. Densely Functionalized 2-Methylideneazetidines from Nitrodienic Building Blocks. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701467] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Cinzia Tavani
- Dipartimento di Chimica e Chimica Industriale; Università di Genova; Via Dodecaneso 31 16146 Genova Italy
| | - Lara Bianchi
- Dipartimento di Chimica e Chimica Industriale; Università di Genova; Via Dodecaneso 31 16146 Genova Italy
| | - Gianluca Giorgi
- Dipartimento di Biotecnologie; Chimica e Farmacia; Università di Siena; Via A. Moro 53100 Siena Italy
| | - Massimo Maccagno
- Dipartimento di Chimica e Chimica Industriale; Università di Genova; Via Dodecaneso 31 16146 Genova Italy
| | - Giovanni Petrillo
- Dipartimento di Chimica e Chimica Industriale; Università di Genova; Via Dodecaneso 31 16146 Genova Italy
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Bianchi L, Giorgi G, Maccagno M, Petrillo G, Scapolla C, Tavani C. On the behavior of bis(sulfonyl)nitrobutadienes towards primary amines: a convenient access to 1-alkyl-2-aryl-4-(phenylsulfonyl)pyrroles. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.09.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Bianchi L, Carloni-Garaventa A, Maccagno M, Pani M, Petrillo G, Scapolla C, Tavani C. Synthesis of poly-functionalized pyrazoles and pyridazines from nitrobutadienes: an interesting dichotomy of practical relevance. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.08.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bianchi L, Maccagno M, Pani M, Petrillo G, Scapolla C, Tavani C. A straight access to functionalized carbazoles by tandem reaction between indole and nitrobutadienes. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.05.046] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bianchi L, Maccagno M, Petrillo G, Scapolla C, Tavani C, Tirocco A. Ring-Opening/Ring-Closing Protocols from Nitrothiophenes: Easy Access toN-Fused Pyrroles through a Tandem 1,6-H Shift/6π-Electrocyclization. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301236] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Highly-substituted pyrazoles and pyridazines by MIRC reactions of hydrazone anions and nitrobutadienic fragments. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.09.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Bianchi L, Giorgi G, Maccagno M, Petrillo G, Scapolla C, Tavani C. An original route to newly-functionalized indoles and carbazoles starting from the ring-opening of nitrothiophenes. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2011.11.137] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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