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Khatua B, Ghosh A, Ray AK, Banerjee N, Dey J, Paul A, Guin J. Photocatalytic Synthesis of β-Keto Primary Chlorides by Selective Chlorocarbonylation of Olefins. Angew Chem Int Ed Engl 2024; 63:e202402849. [PMID: 38389271 DOI: 10.1002/anie.202402849] [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: 02/08/2024] [Revised: 02/22/2024] [Accepted: 02/22/2024] [Indexed: 02/24/2024]
Abstract
Functionalized primary alkyl chlorides are precursors to a plethora of scaffolds but their access from chemical feedstocks remains challenging. Herein, we report a concise dual Ni/photoredox catalytic protocol for regioselective chlorocarbonylation of unactivated alkenes that enables rapid access to β-keto primary chlorides. The catalytic process features an extensive substrate scope, scalability and functional group tolerance. The Ni/photocatalytic Cl⋅ generation and subsequent cross-coupling is implicated for the process based on the control experiments and DFT study. The synthetic utility of the protocol has been further corroborated through functionalization of complex substrates and modifications of the product.
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Affiliation(s)
- Bitasik Khatua
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Anjulika Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Anuj Kumar Ray
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Nayan Banerjee
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Jayanta Dey
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Ankan Paul
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
| | - Joyram Guin
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2 A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, 700032, India
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Kushwaha AK, Kamal A, Singh HK, Maury SK, Mondal T, Singh S. Photoinduced, Metal-Free Hydroacylation of Aromatic Alkynes for Synthesis of α,β-Unsaturated Ketones via C(sp 3)-H Functionalization. Org Lett 2024; 26:1416-1420. [PMID: 38329826 DOI: 10.1021/acs.orglett.4c00031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Despite the notable advancements made over the past decade in achieving carbon-carbon bonds by transition-metal-catalyzed cross-coupling processes, metal-free cross-coupling reactions for hydroacylation of aromatic alkynes via C(sp3)-H functionalization are still rare and highly desired. Here we report a metal-free reliable approach for the synthesis of α,β-unsaturated ketones (chalcones) via C(sp3)-H functionalization using MeCN:H2O as green solvent, Eosin Y as organic photocatalyst, and ambient air as oxidant. More significantly, this strategy can effectively transform a variety of methyl arenes and aromatic alkynes into the desired product. With high atom efficiency, use of green solvents, metal-free nature, environmental friendliness, and visible light as a renewable energy source, this method is compatible with biologically active molecules.
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Affiliation(s)
- Ambuj Kumar Kushwaha
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi 221 005, U.P., India
| | - Arsala Kamal
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi 221 005, U.P., India
| | - Himanshu Kumar Singh
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi 221 005, U.P., India
| | - Suresh Kumar Maury
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi 221 005, U.P., India
| | - Tusar Mondal
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi 221 005, U.P., India
| | - Sundaram Singh
- Department of Chemistry, Indian Institute of Technology (BHU), Varanasi 221 005, U.P., India
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Bhakat M, Khatua B, Biswas P, Guin J. Brønsted Acid-Promoted Intermolecular Dearomative Photocycloaddition of Bicyclic Azaarenes with Olefins under Aerobic Conditions. Org Lett 2023; 25:3089-3093. [PMID: 37096800 DOI: 10.1021/acs.orglett.3c00917] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
Herein, we present a simplified reaction protocol for the dearomatization of bicyclic azaarenes via photochemical cycloaddition with alkenes using an Ir(III) photosensitizer, trifluoroacetic acid (TFA), dichloroethane, and a blue light-emitting diode. An efficient protonation of azaarenes with TFA enhances the reactivity of triplet azaarene toward olefins, enabling the photocycloaddition under aerobic conditions. The protocol applies to a broad range of substrates. Control experiments indicate a strong correlation between the degree of protonation of azaarene and the product yield.
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Affiliation(s)
- Manotosh Bhakat
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Bitasik Khatua
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Promita Biswas
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Joyram Guin
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
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Dey J, Paul S, Bhakat M, Guin J. Photocatalytic Incorporation of an Oxime Ether Functional Group at Inert C(sp 3)–H Bonds via HAT. Org Lett 2022; 24:8047-8051. [DOI: 10.1021/acs.orglett.2c03300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jayanta Dey
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, West Bengal 700032, India
| | - Subhasis Paul
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, West Bengal 700032, India
| | - Manotosh Bhakat
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, West Bengal 700032, India
| | - Joyram Guin
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Jadavpur, Kolkata, West Bengal 700032, India
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Varlet T, Bouchet D, Van Elslande E, Masson G. Decatungstate‐Photocatalyzed Dearomative Hydroacylation of Indoles: Direct Synthesis of 2‐Acylindolines. Chemistry 2022; 28:e202201707. [DOI: 10.1002/chem.202201707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Thomas Varlet
- Institut de Chimie des Substances Naturelles (ICSN) CNRS University Paris-Saclay 1 Avenue de la Terrasse 91198 Gif-sur-Yvette Cedex France
| | - Damien Bouchet
- Institut de Chimie des Substances Naturelles (ICSN) CNRS University Paris-Saclay 1 Avenue de la Terrasse 91198 Gif-sur-Yvette Cedex France
| | - Elsa Van Elslande
- Institut de Chimie des Substances Naturelles (ICSN) CNRS University Paris-Saclay 1 Avenue de la Terrasse 91198 Gif-sur-Yvette Cedex France
| | - Géraldine Masson
- Institut de Chimie des Substances Naturelles (ICSN) CNRS University Paris-Saclay 1 Avenue de la Terrasse 91198 Gif-sur-Yvette Cedex France
- HitCat Seqens-CNRS joint laboratory Seqens'Lab 8 Rue de Rouen 78440 Porcheville France
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Jiang S, Zi-Tong Z, Young DJ, Lu-Lu C, Wu Q, Li HX. Visible-light mediated cross-coupling of aryl halides with sodium sulfinates via carbonyl-photoredox/nickel dual catalysis. Org Chem Front 2022. [DOI: 10.1039/d1qo01850g] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoinduced nickel-catalyzed cross-coupling of arylsulfinates (ArSO2−) with (hetero)aryl halides (Ar’-X) via visible light photoexcitation of 2-chloro-thioxanthen-9-one (Cl-TXO) has been achieved in moderate to excellent yields. This photocoupling exhibited a broad...
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Liu YL, Ouyang YJ, Zheng H, Liu H, Wei WT. Recent advances in acyl radical enabled reactions between aldehydes and alkenes. Chem Commun (Camb) 2021; 57:6111-6120. [PMID: 34113948 DOI: 10.1039/d1cc02112e] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Radical-mediated functionalization of alkenes has been emerging as an elegant and straightforward protocol to increase molecule complexity. Moreover, the abstraction of a hydrogen atom from aldehydes to afford acyl radicals has evolved as a rising star due to its high atom-economy and the ready availability of aldehydes. Considering the great influence and synthetic potential of acyl radical enabled reactions between aldehydes and alkenes, we provide a summary of the state of the art in this field with a specific emphasis on the working models and corresponding mechanisms. The discussion is divided according to the kind of alkenes and reaction type.
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Affiliation(s)
- Yi-Lin Liu
- College of Chemistry and Materials Engineering, Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol (PVA) Fiber Material, Huaihua University, Huaihua, Hunan 418008, China.
| | - Yue-Jun Ouyang
- College of Chemistry and Materials Engineering, Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol (PVA) Fiber Material, Huaihua University, Huaihua, Hunan 418008, China.
| | - Hongxing Zheng
- Institution of Functional Organic Molecules and Materials, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China and College of Chemistry and Materials Engineering, Institute of New Materials & Industrial Technology, Wenzhou University, Wenzhou, 325035, China
| | - Hongxin Liu
- College of Chemistry and Materials Engineering, Institute of New Materials & Industrial Technology, Wenzhou University, Wenzhou, 325035, China
| | - Wen-Ting Wei
- College of Chemistry and Materials Engineering, Hunan Engineering Laboratory for Preparation Technology of Polyvinyl Alcohol (PVA) Fiber Material, Huaihua University, Huaihua, Hunan 418008, China. and School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
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