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Allen LAT, Natho P. Trends in carbazole synthesis - an update (2013-2023). Org Biomol Chem 2023; 21:8956-8974. [PMID: 37906471 DOI: 10.1039/d3ob01605f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
The interest of scientists in the carbazole core has risen steadily over the last 30 years, particularly over the last decade given its presence in several active pharmaceutical ingredients, functional materials and a wide range of biologically active natural products. The continuous development of more efficient, more (regio-)selective and "greener" methodologies to access the carbazole core is thus imperative. This review compares and evaluates synthetic strategies towards the carbazole core that have been reported since 2013, with a focus on their applicability towards the total synthesis of carbazole-containing natural products.
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Affiliation(s)
- Lewis A T Allen
- CheMastery, Paper Yard, 11a Quebec Way, London, SE16 7LG, UK
| | - Philipp Natho
- FLAME-Lab, Flow Chemistry and Microreactor Technology Laboratory, Department of Pharmacy-Drug Sciences, University of Bari "A. Moro", Via E. Orabona 4, 70125 Bari, Italy
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Parsons PJ, Natho P, Allen LAT. A Cyclobutanol Ring-Expansion Approach to Oxygenated Carbazoles: Total Synthesis of Glycoborine, Carbazomycin A and Carbazomycin B. Synlett 2023. [DOI: 10.1055/s-0042-1751411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
AbstractThe transition-metal-free total syntheses of the oxygenated carbazole natural products glycoborine, carbazomycin A and carbazomycin B are reported. The key step involves an NBS-mediated cyclobutanol ring expansion to 4-tetralones for the preparation of the tricyclic carbazole core.
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3
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Huang J, Wang W, Zhang L, Meng X. Recent advances in the synthesis of benzo[b]thiophene fused polycyclic derivatives: strategies and reactions. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.108003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bar S, Martin M. An Efficient Synthesis of Substituted Hexahydrobenzo[f]thieno[c]quinoline; an Advanced Intermediate of Analogue of A-86929, a Dopamine D1 Full Agonist. CAN J CHEM 2022. [DOI: 10.1139/cjc-2021-0290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An efficient synthesis of substituted hexahydrobenzo[f]thieno[c]quinolines was achieved via catalytic one-pot aziridination followed by Friedel–Crafts cyclization and a mild Pictet–Spengler cyclization protocol. Cu(OTf)2 was an effective catalyst for both aziridination followed by Friedel–Crafts cyclization with excellent diastereoselectivity (dr: >99: 1) and high yield (75%).
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Affiliation(s)
- Sukanta Bar
- St Jude Children's Research Hospital, 5417, Structural Biology, 262 DANNY THOMAS PLACE MAIL STOP 312, 38105, Memphis, Tennessee, United States, 38105-3678,
| | - Max Martin
- St. Jude Children’s Research Hospital, Department of Structural Biology, Memphis, Tennessee, United States
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5
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Leclair A, Wang Q, Zhu J. Two-Carbon Ring Expansion of Cyclobutanols to Cyclohexenones Enabled by Indole Radical Cation Intermediate: Development and Application to a Total Synthesis of Uleine. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05621] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Alexandre Leclair
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, CH-1015 Lausanne, Switzerland
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Biletskyi B, Colonna P, Masson K, Parrain JL, Commeiras L, Chouraqui G. Small rings in the bigger picture: ring expansion of three- and four-membered rings to access larger all-carbon cyclic systems. Chem Soc Rev 2021; 50:7513-7538. [PMID: 34002179 DOI: 10.1039/d0cs01396j] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The release of the inherent ring strain of cyclobutane and cyclopropane derivatives allows a rapid build-up of molecular complexity. This review highlights the state-of-the-art of the ring expansions of three- and four-membered cycles and is organised by types of reactions with emphasis on the reaction mechanisms. Selected examples are discussed to illustrate the synthetic potential of this elegant synthetic tool.
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Affiliation(s)
- Bohdan Biletskyi
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Pierre Colonna
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Kévin Masson
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Jean-Luc Parrain
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Laurent Commeiras
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
| | - Gaëlle Chouraqui
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.
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Natho P, Yang Z, Allen LAT, Rey J, White AJP, Parsons PJ. An entry to 2-(cyclobut-1-en-1-yl)-1 H-indoles through a cyclobutenylation/deprotection cascade. Org Biomol Chem 2021; 19:4048-4053. [PMID: 33885127 DOI: 10.1039/d1ob00430a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A transition-metal-free strategy for the synthesis of 2-(cyclobut-1-en-1-yl)-1H-indoles under mild conditions is described herein. A series of substituted 2-(cyclobut-1-en-1-yl)-1H-indoles are accessed by a one-pot cyclobutenylation/deprotection cascade from N-Boc protected indoles. Preliminary experimental and density functional theory calculations suggest that a Boc-group transfer is involved in the underlying mechanism.
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Affiliation(s)
- Philipp Natho
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ London, UK.
| | - Zeyu Yang
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ London, UK.
| | - Lewis A T Allen
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ London, UK.
| | - Juliette Rey
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ London, UK.
| | - Andrew J P White
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ London, UK.
| | - Philip J Parsons
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, W12 0BZ London, UK.
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Petti A, Natho P, Lam K, Parsons PJ. Regioselective Electrochemical Cyclobutanol Ring Expansion to 1‐Tetralones. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001535] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Alessia Petti
- School of Science University of Greenwich Chatham Maritime ME4 4TB United Kingdom
| | - Philipp Natho
- Department of Chemistry Imperial College London Molecular Sciences Research Hub W12 0BZ London United Kingdom
| | - Kevin Lam
- School of Science University of Greenwich Chatham Maritime ME4 4TB United Kingdom
| | - Philip J. Parsons
- Department of Chemistry Imperial College London Molecular Sciences Research Hub W12 0BZ London United Kingdom
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