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Hann JL, Lyall CL, Kociok-Köhn G, Faverio C, Pantoş GD, Lewis SE. Unusual Regio- and Chemoselectivity in Oxidation of Pyrroles and Indoles Enabled by a Thianthrenium Salt Intermediate. Angew Chem Int Ed Engl 2024:e202405057. [PMID: 38830180 DOI: 10.1002/anie.202405057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 05/31/2024] [Accepted: 06/03/2024] [Indexed: 06/05/2024]
Abstract
A dearomative oxidation of pyrroles to Δ3-pyrrol-2-ones is described, which employs a sulfoxide as oxidant, in conjunction with a carboxylic acid anhydride and a Brønsted acid additive. 3-substituted pyrroles undergo regioselective oxidation to give the product isomer in which oxygen has been introduced at the more hindered position. Regioselectivity is rationalized by a proposed mechanism that proceeds by initial thianthrenium introduction at the less-hindered pyrrole α-position, followed by distal attack of an oxygen nucleophile and subsequent elimination of thianthrene. The same reaction conditions are also able to effect a chemoselective oxidation of indoles to indolin-3-ones and additionally of indolin-3-ones to 2-hydroxyindolin-3-ones. Here again, the regio- and chemoselectivities are rationalized through the intermediacy of a thianthrenium salt.
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Affiliation(s)
- Jodie L Hann
- Department of Chemistry, University of Bath, Bath, BA2 7AY, United Kingdom
| | - Catherine L Lyall
- Research Facilities, University of Bath, Bath, BA2 7AY, United Kingdom
| | | | - Chiara Faverio
- Department of Chemistry, University of Bath, Bath, BA2 7AY, United Kingdom
| | - G Dan Pantoş
- Department of Chemistry, University of Bath, Bath, BA2 7AY, United Kingdom
| | - Simon E Lewis
- Department of Chemistry, University of Bath, Bath, BA2 7AY, United Kingdom
- Institute of Sustainability and Climate Change, University of Bath, Bath, BA2 7AY, United Kingdom
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2
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Do TH, Phaenok S, Soorukram D, Modjinou T, Grande D, Nguyen TTT, Nguyen TB. Synthesis of Thioureas, Thioamides, and Aza-Heterocycles via Dimethyl-Sulfoxide-Promoted Oxidative Condensation of Sulfur, Malonic Acids, and Amines. Org Lett 2023; 25:6322-6327. [PMID: 37606344 DOI: 10.1021/acs.orglett.3c02247] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
Malonic acid and derivatives have been well-known to undergo monodecarboxylation under relatively mild conditions and have been exclusively used as a C2 synthon. We report herein their new application as a C1 synthon via double decarboxylation promoted by sulfur and dimethyl sulfoxide. In the presence of amines as nucleophiles, a wide range of thioureas and thioamides as well as N-heterocycles were obtained in good to excellent yields under mild heating conditions.
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Affiliation(s)
- Trung Hieu Do
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Supasorn Phaenok
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama VI Road, Bangkok 10400, Thailand
| | - Tina Modjinou
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Daniel Grande
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Thi Thanh Tam Nguyen
- Université Paris-Est Créteil, CNRS, Institut de Chimie et des Matériaux Paris-Est, UMR 7182, 2 Rue Henri Dunant, 94320 Thiais, France
| | - Thanh Binh Nguyen
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Université Paris-Sud, Université Paris-Saclay, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
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Bankura A, Saha J, Maity R, Das I. Non‐Bonding 1,4‐Sulphur‐Oxygen Interaction Governs the Reactivity of α‐Ketothioesters in Triphenylphosphine‐Catalyzed Cyclization with Acetylenedicarboxylates. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Abhijit Bankura
- Organic and Medicinal Chemistry Division CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India
| | - Jayanta Saha
- Organic and Medicinal Chemistry Division CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India
| | - Rajib Maity
- Organic and Medicinal Chemistry Division CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India
| | - Indrajit Das
- Organic and Medicinal Chemistry Division CSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India
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4
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Yadav P, Pratap R, Ji Ram V. Natural and Synthetic Spirobutenolides and Spirobutyrolactones. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000259] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Pratik Yadav
- Department of Chemistry Kirori Mal College University of Delhi Delhi 110 007 India
| | - Ramendra Pratap
- Department of Chemistry University of Delhi Delhi 110 007 India
| | - Vishnu Ji Ram
- B-67, Eldeco Towne IIM road, PO-Diguria Lucknow-226020 Uttar Pradesh India
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5
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Phae-nok S, Pohmakotr M, Kuhakarn C, Reutrakul V, Soorukram D. Site-Specific Synthesis of β-Fluorinated γ-Butyrolactams via Decarboxylative Fluorination of β-Carboxyl-γ-Butyrolactams. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900685] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Supasorn Phae-nok
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC); Faculty of Science; Mahidol University; Rama VI Road 10400 Bangkok Thailand
| | - Manat Pohmakotr
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC); Faculty of Science; Mahidol University; Rama VI Road 10400 Bangkok Thailand
| | - Chutima Kuhakarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC); Faculty of Science; Mahidol University; Rama VI Road 10400 Bangkok Thailand
| | - Vichai Reutrakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC); Faculty of Science; Mahidol University; Rama VI Road 10400 Bangkok Thailand
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC); Faculty of Science; Mahidol University; Rama VI Road 10400 Bangkok Thailand
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6
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Gérardy R, Winter M, Horn CR, Vizza A, Van Hecke K, Monbaliu JCM. Continuous-Flow Preparation of γ-Butyrolactone Scaffolds from Renewable Fumaric and Itaconic Acids under Photosensitized Conditions. Org Process Res Dev 2017. [DOI: 10.1021/acs.oprd.7b00314] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Romaric Gérardy
- Center
for Integrated Technology and Organic Synthesis, Department of Chemistry, University of Liège, B-4000 Liège (Sart Tilman), Belgium
| | - Marc Winter
- Corning
Reactor Technologies, Corning SAS, 7 bis Avenue de Valvins, CS 70156
Samois sur Seine, 77215 Avon Cedex, France
| | - Clemens R. Horn
- Corning
Reactor Technologies, Corning SAS, 7 bis Avenue de Valvins, CS 70156
Samois sur Seine, 77215 Avon Cedex, France
| | - Alessandra Vizza
- Corning
Reactor Technologies, Corning SAS, 7 bis Avenue de Valvins, CS 70156
Samois sur Seine, 77215 Avon Cedex, France
| | - Kristof Van Hecke
- XStruct,
Department of Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium
| | - Jean-Christophe M. Monbaliu
- Center
for Integrated Technology and Organic Synthesis, Department of Chemistry, University of Liège, B-4000 Liège (Sart Tilman), Belgium
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