1
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Yi M, Wu X, Yang L, Yuan Y, Lu Y, Zhang Z. Visible Light Induced B-H Bond Insertion Reaction with Diazo Compounds. J Org Chem 2024; 89:12583-12590. [PMID: 39158102 DOI: 10.1021/acs.joc.4c01510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/20/2024]
Abstract
A protocol induced by visible light for the direct insertion of α-carbonyl carbenes into the B-H bond of amine-borane adducts has been developed under conditions that are free of metal and photocatalyst. This approach provides a straightforward route to various organoboron compounds from diazo compounds and amine-borane adducts with moderate to good yields. Mechanistic investigations reveal that this photoinduced reaction proceeds through concerted carbene insertion into the B-H bond, and the photoinduced generation of free carbene from α-diazo esters may be the rate-determining step.
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Affiliation(s)
- Mingjun Yi
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xiaoyu Wu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Liqun Yang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yao Yuan
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yan Lu
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Zhaoguo Zhang
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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2
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Sang QQ, Chen ZL, Yao N, Xuan J. Visible-Light-Promoted N-H Insertion/Controllable Transformation of Diazoalkanes and 3-Aminomethylated Maleimides. J Org Chem 2024. [PMID: 39235899 DOI: 10.1021/acs.joc.4c01791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2024]
Abstract
The utilization of photogenerated carbene species to perform N-H insertion reactions has attracted considerable attention in the past few years. In this Article, we disclose a visible-light-promoted N-H insertion of 3-aminomethylated maleimides with aryl diazoacetates under sole blue LED irradiation. Continuous flow reactor technology was exploited to improve the reaction efficiency. By simply varying the reaction conditions, the formed N-H insertion products could be selectively transferred to bioimportant octahydropyrrolo[3,4-c]pyrroles and E-selective trisubstituted olefins.
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Affiliation(s)
- Qian-Qian Sang
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Ze-Le Chen
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Na Yao
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Ministry of Education, Anhui University, Hefei, Anhui 230601, People's Republic of China
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3
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Empel C, Pham QH, Koenigs RM. Spin States Matter─from Fundamentals toward Synthetic Methodology Development and Drug Discovery. Acc Chem Res 2024. [PMID: 39221592 DOI: 10.1021/acs.accounts.4c00405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
ConspectusThe potent reactivity of carbenes and nitrenes has been traditionally harnessed by the employment of a transition-metal catalyst in which the reactivity of the metal carbene/nitrene intermediates can be controlled via the judicious tuning of the metal catalyst. In recent years, progress made in this research area has unveiled novel strategies to directly access free carbenes or nitrenes under visible-light-mediated conditions without the necessity of a metal catalyst for stabilization of the carbene/nitrene intermediate. Such photochemical approaches present new opportunities to leverage orthogonal reactions with classic metal-catalyzed transformations.In this Account, we describe the major contributions from our group over the past years pushing the boundaries of light-mediated carbene and nitrene transfer reactions. In the first section, the development from purely singlet carbene chemistry toward methods that allow access to triplet carbene intermediates will be dissected. We describe how the triplet spin state of reagents provides a rich array of novel synthetic methods that build on the fundamentals of spin conservation. We lay out the different strategies in accessing the triplet spin state of carbenes (i.e., via electronic stabilization, via triplet sensitization with suitable photocatalysts, or via exploitation of geometric features of these intermediates), followed by an analysis of how the triplet spin state can be employed to leverage reactions distinct to the classic singlet carbene chemistry.The second part focuses on free nitrene intermediates, whereby both photochemical and photocatalytic strategies are analyzed and compared. We initiate with a discussion of the reactivity of iminoiodinanes as nitrene precursors in the presence of a photocatalyst or under photochemical conditions and how these two approaches result in fundamentally distinct nitrogen-based intermediates. While a nitrene radical anion is formed under photocatalytic conditions, triplet nitrene is generated under photochemical conditions. We commence with an outline of the basic reactivity of nitrene transfer reactions under both conditions, with a focus on the reaction with substrates containing double bonds. Finally, the latest developments in advanced cycloaddition chemistry beyond classic aziridination reactions are examined, with a special emphasis on the relay of the triplet nitrene reactivity to enable a Pauson-Khand-like (2 + 2 + 1) cycloaddition reaction that offers convenient access to high value bioisosteres in drug discovery.The work from our group on spin-dependent reactivities offers insight into important fundamentals in synthesis, where the spin state of the reactive intermediate will dictate the reaction outcome. We hope this may inspire others to widen the scope of applications of light-mediated carbene and/or nitrene transfer reactions, and furthermore, we anticipate that these understandings may also enable the development of advanced catalytic systems featuring triplet metal carbene/nitrene intermediates.
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Affiliation(s)
- Claire Empel
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Quoc Hoang Pham
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Rene M Koenigs
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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4
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Zhang Z, Gevorgyan V. Visible Light-Induced Reactions of Diazo Compounds and Their Precursors. Chem Rev 2024; 124:7214-7261. [PMID: 38754038 DOI: 10.1021/acs.chemrev.3c00869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
In recent years, visible light-induced reactions of diazo compounds have attracted increasing attention in organic synthesis, leading to improvement of existing reactions, as well as to the discovery of unprecedented transformations. Thus, photochemical or photocatalytic generation of both carbenes and radicals provide milder tools toward these key intermediates for many valuable transformations. However, the vast majority of the transformations represent new reactivity modes of diazo compounds, which are achieved by the photochemical decomposition of diazo compounds and photoredox catalysis. In particular, the use of a redox-active photocatalysts opens the avenue to a plethora of radical reactions. The application of these methods to diazo compounds led to discovery of transformations inaccessible by the classical reactivity associated with carbenes and metal carbenes. In most cases, diazo compounds act as radical sources but can also serve as radical acceptors. Importantly, the described processes operate under mild, practical conditions. This Review describes this subfield of diazo compound chemistry, particularly focusing on recent advancements.
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Affiliation(s)
- Ziyan Zhang
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
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5
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Liu Y, Yang Q, Wang W, Fu Y, Ding Q, Peng Y. Visible-light-induced three-component reactions of α-diazoesters, quinazolinones and cyclic ethers toward quinazoline-based hybrids. Org Biomol Chem 2024; 22:4332-4346. [PMID: 38726656 DOI: 10.1039/d4ob00295d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
An effective approach for the construction of 4-short-chain ether attached carbonyl group-substituted quinazolines was developed. Visible-light-induced three-component reactions of α-diazoesters, quinazolinones, and cyclic ethers, with a broad substrate scope and excellent functional group tolerance, under extremely mild conditions without the need for any additional additives and catalysts, selectively led to quinazoline-based hybrids in good to excellent yields. The synthesized hybrids, which are a conglomeration of a quinazoline, a short-chain ether, and a carbonyl group in one molecular skeleton, have potential for application in the development of new drugs or drug candidates.
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Affiliation(s)
- Yan Liu
- Key Laboratory for Green Chemistry of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China.
| | - Qin Yang
- Key Laboratory for Green Chemistry of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China.
| | - Wei Wang
- Key Laboratory for Green Chemistry of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China.
| | - Yang Fu
- Key Laboratory for Green Chemistry of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China.
| | - Qiuping Ding
- Key Laboratory for Green Chemistry of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China.
| | - Yiyuan Peng
- Key Laboratory for Green Chemistry of Jiangxi Province, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China.
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6
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Di Terlizzi L, Nicchio L, Protti S, Fagnoni M. Visible photons as ideal reagents for the activation of coloured organic compounds. Chem Soc Rev 2024; 53:4926-4975. [PMID: 38596901 DOI: 10.1039/d3cs01129a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
In recent decades, the traceless nature of visible photons has been exploited for the development of efficient synthetic strategies for the photoconversion of colourless compounds, namely, photocatalysis, chromophore activation, and the formation of an electron donor/acceptor (EDA) complex. However, the use of photoreactive coloured organic compounds is the optimal strategy to boost visible photons as ideal reagents in synthetic protocols. In view of such premises, the present review aims to provide its readership with a collection of recent photochemical strategies facilitated via direct light absorption by coloured molecules. The protocols have been classified and presented according to the nature of the intermediate/excited state achieved during the transformation.
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Affiliation(s)
- Lorenzo Di Terlizzi
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy.
| | - Luca Nicchio
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy.
| | - Stefano Protti
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy.
| | - Maurizio Fagnoni
- PhotoGreen Lab, Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy.
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7
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Fujioka H, Yasui M, Hamada S, Fukumi K, Takeda N, Kobayashi Y, Furuta T, Ueda M. Palladium-catalyzed C-C bond cleavage of N-cyclopropyl acylhydrazones. Org Biomol Chem 2024; 22:3262-3267. [PMID: 38568183 DOI: 10.1039/d4ob00349g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Despite their utility as directing groups, the C-C bond cleavage of cyclopropanes utilizing hydrazones has not been explored. Herein, Pd-catalyzed C-C bond cleavage reaction of N-cyclopropyl acylhydrazones, followed by cycloisomerization to yield pyrazoles, has been developed. The protocol enables the synthesis of various α-pyrazole carbonyl compounds, which have a potential of biological activity. Control experiments and DFT calculations suggest that β-carbon elimination of a stable 6-membered chelate palladium complex occurs, generating a conjugated azine as a reaction intermediate for the following cycloisomerization.
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Affiliation(s)
- Hiroki Fujioka
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Motohiro Yasui
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Shohei Hamada
- Department of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan.
| | - Kohei Fukumi
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Norihiko Takeda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
| | - Yusuke Kobayashi
- Department of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan.
| | - Takumi Furuta
- Department of Pharmaceutical Chemistry, Kyoto Pharmaceutical University, Yamashina-ku, Kyoto 607-8414, Japan.
| | - Masafumi Ueda
- Kobe Pharmaceutical University, Motoyamakita, Higashinada, Kobe 658-8558, Japan.
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8
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Takeda N, Miyashita T, Hirokawa N, Yasui M, Ueda M. P(III)-Mediated Formal Reductive N-H Bond Insertion Reaction of Hydrazones to α-Keto Esters. Chem Pharm Bull (Tokyo) 2024; 72:413-420. [PMID: 38684408 DOI: 10.1248/cpb.c24-00091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
A diazo-, metal-, and base-free multi-substituted hydrazone synthesis via a formal reductive N-H bond insertion reactions of hydrazones to α-keto esters has been developed. The protocol features a broad substrate scope and good functional group tolerance, providing N-H bond insertion products in moderate to excellent yields. Moreover, P(III)-mediated N-H functionalization of pharmaceutical containing hydrazone moiety was also successfully achieved.
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9
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Hota SK, Murarka S. Visible Light-Induced Imide Alkylation of Azauracils with Aryl Diazoesters. Chem Asian J 2023:e202301027. [PMID: 38052726 DOI: 10.1002/asia.202301027] [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: 11/21/2023] [Revised: 12/05/2023] [Accepted: 12/05/2023] [Indexed: 12/07/2023]
Abstract
A visible light-induced green and sustainable N-H functionalization of (aza)uracils with α-diazo esters leading to imide alkylation is described. The reaction does not require any catalyst or additive and proceeds under mild conditions. Moreover, an intriguing three component coupling was observed when (aza)uracils were allowed to react with α-diazo esters in cyclic ethers (e. g. 1,4-dioxane, THF) as a solvent. Both the insertion and three-component coupling features broad scope with good to excellent yields and appreciable functional group tolerance. Notably, the divergent method enables modification of natural products and pharmaceuticals, thereby facilitates access to potentially biologically active compounds.
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Affiliation(s)
- Sudhir Kumar Hota
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar, 342037, Rajasthan, India
| | - Sandip Murarka
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar, 342037, Rajasthan, India
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10
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Roy S, Biswas A, Paul H, Ariyan SK, Chatterjee I. Introducing N-Sulfinylamines into Visible-Light-Induced Carbene Chemistry for the Synthesis of Diverse Amides and α-Iminoesters. Org Lett 2023; 25:8511-8515. [PMID: 37975825 DOI: 10.1021/acs.orglett.3c03486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
A rare example of visible-light-mediated diverse reactivity of N-sulfinylamines with different types of carbene precursors has been disclosed. Acylsilanes and aryldiazoacetates have been utilized as nucleophilic and electrophilic carbene precursors into the N═S═O linchpin, to achieve valuable amides and α-iminoesters, respectively. Interestingly, diazocarbonyls can also participate in the amidation reaction with N-sulfinylamines via in situ generated ketenes. This operationally simple modular method offers a mild, transition-metal-free, and coupling-reagent-free protocol to fabricate structurally diverse amides and a promptly accessible technique to achieve α-iminoesters, where visible light remains as a key promoter.
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Affiliation(s)
- Sourav Roy
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India
| | - Apurba Biswas
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India
| | - Hrishikesh Paul
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India
| | - S K Ariyan
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India
| | - Indranil Chatterjee
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab-140001, India
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11
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Dolcini L, Gandini T, Castiglioni R, Bossi A, Penconi M, Dal Corso A, Gennari C, Pignataro L. Visible Light-Promoted β-Functionalization of Carbonyl Compounds in the Presence of Organic Dyes. J Org Chem 2023; 88:14283-14291. [PMID: 37792665 PMCID: PMC10594657 DOI: 10.1021/acs.joc.3c00890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Indexed: 10/06/2023]
Abstract
Herein, we investigate the use of organic photocatalysts in the visible light-promoted β-functionalization of carbonyl compounds. In particular, we studied the addition of aliphatic aldehydes to α,β-unsaturated compounds (β-Michael addition), and the reaction of cyclic ketones with either ketones (β-aldol condensation) or imines (β-Mannich reaction). Among the dyes tested, donor-acceptor cyanoarenes gave the best results, promoting the transformations of interest in moderate to good yields. The reaction scope was investigated on substrates with different steric and electronic properties. Fluorescence quenching analysis (Stern-Volmer experiments) led us to propose for these reactions a reductive quenching mechanism involving a transient 5πe- activation mode.
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Affiliation(s)
- Luigi Dolcini
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
| | - Tommaso Gandini
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
| | - Riccardo Castiglioni
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
| | - Alberto Bossi
- Istituto
di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC)
del Consiglio Nazionale delle Ricerche (CNR), via Fantoli 16/15; SmartMatLab Center, via C. Golgi
19, Milano 20138, Italy
| | - Marta Penconi
- Istituto
di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC)
del Consiglio Nazionale delle Ricerche (CNR), via Fantoli 16/15; SmartMatLab Center, via C. Golgi
19, Milano 20138, Italy
| | - Alberto Dal Corso
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
| | - Cesare Gennari
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
| | - Luca Pignataro
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
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12
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Hussain Y, Empel C, Koenigs RM, Chauhan P. Carbene Formation or Reduction of the Diazo Functional Group? An Unexpected Solvent-Dependent Reactivity of Cyclic Diazo Imides. Angew Chem Int Ed Engl 2023; 62:e202309184. [PMID: 37506274 DOI: 10.1002/anie.202309184] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 07/25/2023] [Accepted: 07/26/2023] [Indexed: 07/30/2023]
Abstract
The control of the reactivity of diazo compounds is commonly achieved by the choice of a suitable catalyst, e.g. via stabilization of singlet carbenes or radical intermediates. Herein, we report on the light-promoted reactivity of cyclic diazo imides with thiols, where the choice of solvent results in two fundamentally different reaction pathways. In dichloromethane (DCM), a carbene is formed initially and engages in a cascade C-H functionalization/thiolation reaction to deliver indane-fused pyrrolidines in good to excellent yields. When switching to acetonitrile solvent, the carbene pathway is shut down and an unusual reduction of the diazo compound occurs under otherwise identical reaction conditions, where the aryl thiol acts as reductant. A combined set of experimental and computational studies was carried out to obtain mechanistic understanding and to support that indane formation proceeds via the insertion of a triplet carbene, while the reduction of diazo imides proceeds via an electron transfer process.
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Affiliation(s)
- Yaseen Hussain
- Department of Chemistry, Indian Institute of Technology Jammu Jagti, NH-44, Nagrota Bypass, Jammu, 181221, J&K, India
| | - Claire Empel
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, 52074, Aachen, Germany
| | - Rene M Koenigs
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, 52074, Aachen, Germany
| | - Pankaj Chauhan
- Department of Chemistry, Indian Institute of Technology Jammu Jagti, NH-44, Nagrota Bypass, Jammu, 181221, J&K, India
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13
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Rath S, Maiti D, Modi M, Pal P, Munan S, Mohanty B, Bhatia A, Bhowal R, Priyadarshini R, Samanta A, Munshi P, Sen S. Metal-free synthesis and study of glycine betaine derivatives in water for antimicrobial and anticancer applications. iScience 2023; 26:107285. [PMID: 37575199 PMCID: PMC10415718 DOI: 10.1016/j.isci.2023.107285] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/01/2023] [Accepted: 06/30/2023] [Indexed: 08/15/2023] Open
Abstract
A sustainable synthesis of interesting glycine betaine derivatives from cyclic 3°-amines viz. N-methyl morpholine (NMM), N-methyl piperidine (NMP), and 1,4-diazabicyclo[2.2.2]octane (DABCO) with numerous aryl diazoacetates 1 in water and under blue LED is reported. Generally, 3°-amines and metal carbenoids (from diazoacetates with transition metal catalysts) provide C-H insertion at the α-position of the amines. Computational comparison of the metal carbenoid with the singlet carbene (metal free and generated under blue LED) realized the difference in reactivity. Next, experimental results corroborated the preliminary findings. The products were isolated either by precipitation of the solid or gel-like final products from the aqueous reaction mixture without any chromatographic purification. The reaction mechanism was realized by control experiments. These compounds exhibit selective bactericidal properties against Gram-positive S. aureus, induce lipid droplets (LDs) formation in HePG2 cells and single crystal X-ray diffraction study of their halogenated analogs reveal interesting Hal … Hal contacts.
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Affiliation(s)
- Suchismita Rath
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Debajit Maiti
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Malvika Modi
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Parul Pal
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Subrata Munan
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Biswajit Mohanty
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Anjani Bhatia
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Rohit Bhowal
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Richa Priyadarshini
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Animesh Samanta
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Parthapratim Munshi
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
| | - Subhabrata Sen
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University, Gautam Buddha Nagar, Chithera, Dadri, UP 201310, India
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14
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Maiti D, Saha A, Guin S, Maiti D, Sen S. Unveiling catalyst-free electro-photochemical reactivity of aryl diazoesters and facile synthesis of oxazoles, imide-fused pyrroles and tetrahydro-epoxy-pyridines via carbene radical anions. Chem Sci 2023; 14:6216-6225. [PMID: 37325143 PMCID: PMC10266477 DOI: 10.1039/d3sc00089c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/16/2023] [Indexed: 06/17/2023] Open
Abstract
Herein, we report a reagent-less (devoid of catalyst, supporting electrolyte, oxidant and reductant) electro-photochemical (EPC) reaction [electricity (50 μA) and blue LED (5 W)] of aryl diazoesters to generate radical anions which are subsequently reacted with acetonitrile or propionitrile and maleimides to generate diversely substituted oxazoles, diastereo-selective imide-fused pyrroles and tetrahydroepoxy-pyridines in good to excellent yield. Thorough mechanistic investigation including a 'biphasic e-cell' experiment supports the reaction mechanism involving a carbene radical anion. The tetrahydroepoxy-pyridines could be fluently converted to fused pyridines resembling vitamin B6 derivatives. The source of the electric current in the EPC reaction could be a simple cell phone charger. The reaction was efficiently scaled up to the gram level. Crystal structure, 1D, 2D NMRs and HRMS data confirmed the product structures. This report demonstrates a unique generation of radical anions via electro-photochemistry and their direct applications in the synthesis of important heterocycles.
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Affiliation(s)
- Debajit Maiti
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University Chithera, Dadri, Gautam Buddha Nagar UP 201314 India
| | - Argha Saha
- Department of Chemistry, IIT-Bombay Powai Mumbai 400076 MH India
| | - Srimanta Guin
- Department of Chemistry, IIT-Bombay Powai Mumbai 400076 MH India
| | - Debabrata Maiti
- Department of Chemistry, IIT-Bombay Powai Mumbai 400076 MH India
| | - Subhabrata Sen
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence Deemed to be University Chithera, Dadri, Gautam Buddha Nagar UP 201314 India
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15
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Guo W, Zhou Y, Xie H, Yue X, Jiang F, Huang H, Han Z, Sun J. Visible-light-induced organocatalytic enantioselective N-H insertion of α-diazoesters enabled by indirect free carbene capture. Chem Sci 2023; 14:843-848. [PMID: 36755716 PMCID: PMC9890670 DOI: 10.1039/d2sc05149d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 11/28/2022] [Indexed: 11/30/2022] Open
Abstract
While asymmetric insertion of metal carbenes into H-X (X = C, N, O, etc.) bonds has been well-established, asymmetric control over free carbenes is challenging due to the presence of strong background reactions and lack of any anchor for a catalyst interaction. Here we have achieved the first photo-induced metal-free asymmetric H-X bond insertion of this type. With visible light used as a promoter and a chiral phosphoric acid used as a catalyst, α-diazoesters and aryl amines underwent smooth N-H bond insertion to form enantioenriched α-aminoesters with high efficiency and good enantioselectivity under mild conditions. Key to the success was the use of DMSO as an additive, which served to rapidly capture the highly reactive free carbene intermediate to form a domesticated sulfoxonium ylide.
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Affiliation(s)
- Wengang Guo
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Ying Zhou
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Hongling Xie
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Xin Yue
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Feng Jiang
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Hai Huang
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Zhengyu Han
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Jianwei Sun
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University Changzhou 213164 China .,Department of Chemistry, The Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST) Clear Water Bay Kowloon Hong Kong SAR China.,Shenzhen Research Institute, HKUST No. 9 Yuexing 1st Rd Shenzhen 518057 China
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16
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Rath S, Mohanty B, Sen S. "All-Aqueous" Tandem Boc-Deprotection and Alkylation of N-Bocbenzimidazole Derivatives under Visible Light with Alkyl Aryl Diazoacetates: Application to Site-Selective Insertion of Carbenes into the N-H Bond of Purines. J Org Chem 2023; 88:1036-1048. [PMID: 36579969 DOI: 10.1021/acs.joc.2c02467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Herein, we have reported a blue LED-induced tandem Boc-deprotection and NH-alkylation of benzimidazole derivatives with methyl aryl diazoacetates. The reactions occur in water at room temperature. The desired products are obtained in good to excellent yields. The putative mechanism of this reaction is discussed based on control experiments and supported by DFT studies. Additionally, the strategy is used to alkylate various purine derivatives via site-selective N1-alkylation to generate acyclic nucleoside analogues.
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Affiliation(s)
- Suchismita Rath
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institute of Eminence Deemed to be University, Chithera, Gautam Buddha Nagar, Dadri, Uttar Pradesh 201314, India
| | - Biswajit Mohanty
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institute of Eminence Deemed to be University, Chithera, Gautam Buddha Nagar, Dadri, Uttar Pradesh 201314, India
| | - Subhabrata Sen
- Department of Chemistry, School of Natural Sciences, Shiv Nadar Institute of Eminence Deemed to be University, Chithera, Gautam Buddha Nagar, Dadri, Uttar Pradesh 201314, India
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17
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Zhu K, Zhou X, Ren Y, Dong L, Zhao G, Zhao J, Li P. Visible light-induced carbene reactivity of acceptor diazoalkanes: deconstructive difunctionalizations of cyclic ethers with nucleophiles. Chem Commun (Camb) 2023; 59:631-634. [PMID: 36533686 DOI: 10.1039/d2cc05632a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A visible light-induced carbene reactivity of acceptor diazoalkanes has been developed for the synthesis of difunctionalized ethers from cyclic ethers and various N/O/S nucleophiles.
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Affiliation(s)
- Keyong Zhu
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, P. R. China.
| | - Xinlong Zhou
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, P. R. China.
| | - Yikun Ren
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, P. R. China.
| | - Linhui Dong
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, P. R. China.
| | - Guanzhen Zhao
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, P. R. China.
| | - Jingjing Zhao
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, P. R. China.
| | - Pan Li
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, P. R. China.
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18
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Zhao Y, Liu F, Wang Q, Xia W. Visible-Light-Promoted N-Alkylation Reactions of (aza)Aromatic Amines with Ethyl Diazoacetate. ACTA CHIMICA SINICA 2023. [DOI: 10.6023/a22120490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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19
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Kumar V, Lal K, Kumar A, Tittal RK, Singh MB, Singh P. Efficient synthesis, antimicrobial and molecular modelling studies of 3-sulfenylated oxindole linked 1,2,3-triazole hybrids. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04933-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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20
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Silver-Catalyzed Cascade Cyclization of Amino-NH-1,2,3-Triazoles with 2-Alkynylbenzaldehydes: An Access to Pentacyclic Fused Triazoles. Molecules 2022; 27:molecules27217567. [PMID: 36364393 PMCID: PMC9655256 DOI: 10.3390/molecules27217567] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 10/25/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022] Open
Abstract
An operationally simple Ag(I)-catalyzed approach for the synthesis of isoquinoline and quinazoline fused 1,2,3-triazoles was developed by a condensation and amination cyclization cascade of amino-NH-1,2,3-triazoles with 2-alkynylbenzaldehydes involving three new C-N bond formations in one manipulation, in which the group of -NH of the triazole ring serves as a nucleophile to form the quinazoline skeleton. The efficient protocol can be applied to a variety of substrates containing a range of functional groups, delivering novel pentacyclic fused 1,2,3-triazoles in good-to-excellent yields.
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21
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Karmakar U, Hwang HS, Lee Y, Cho EJ. Photocatalytic para-Selective C-H Functionalization of Anilines with Diazomalonates. Org Lett 2022; 24:6137-6141. [PMID: 35973228 DOI: 10.1021/acs.orglett.2c02228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Visible-light-induced para-selective C-H functionalization of anilines over N-H insertion was developed using diazomalonates with the help of an Ir(III) photocatalyst. The para-selective radical-radical cross coupling proceeded via C-centered radical intermediates generated from both anilines and diazomalonates. The photochemistry of anilines could be extended to other N-heterocycles, such as indole and carbazole. The reaction pathway for the selective C-C coupling was validated by electrochemical and photophysical experiments as well as computational studies.
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Affiliation(s)
- Ujjwal Karmakar
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Ho Seong Hwang
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Yunjeong Lee
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Republic of Korea
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22
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Zhu K, Cao M, Zhao G, Zhao J, Li P. Visible Light-Promoted Diazoacetates and Nitriles Generating Nitrilium Ions Trapped by Benzotriazoles and Carboxylic Acids. Org Lett 2022; 24:5855-5859. [PMID: 35916596 DOI: 10.1021/acs.orglett.2c02426] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A visible light-promoted generation of nitrilium ions from diazoacetates and nitriles has been developed. The reaction utilized visible light transformation of diazoacetates to the free carbene that could be trapped by nitriles to generate nitrilium ions, followed by nucleophilic attack on the benzotriazoles and carboxylic acids. This protocol provides an efficient and practical approach to N-imidoylbenzotriazoles and diacylglycine esters in good to excellent yields.
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Affiliation(s)
- Keyong Zhu
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Mengting Cao
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Guanzhen Zhao
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Jingjing Zhao
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Pan Li
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
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23
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Chen R, Ma G, Li Y, Zhang J, Xia R, Wang KK, Liu L. TBAI-Catalyzed S-H and N-H Insertion Reactions of α-Diazoesters with Thiophenols and Amines under Metal-Free Conditions. J Org Chem 2022; 87:10990-10999. [PMID: 35916386 DOI: 10.1021/acs.joc.2c01262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Mild, convenient, and effective TBAI-catalyzed S-H and N-H insertion reactions of α-diazoesters with thiophenols and aromatic amines under metal-free conditions have been described, furnishing a straightforward and general platform for the synthesis of various thioethers and 2-amino-2-oxoacetates in moderate to excellent yields. Moreover, this strategy features simple operation, mild conditions, broad substrate scope, and easy scale-up.
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Affiliation(s)
- Rongxiang Chen
- School of Pharmacy, Xinxiang University, Xinxiang 453003, P.R. China
| | - Guoyang Ma
- School of Chemistry and Materials Engineering, Xinxiang University, Xinxiang 453003, P.R. China
| | - Yawen Li
- School of Pharmacy, Xinxiang University, Xinxiang 453003, P.R. China
| | - Jinju Zhang
- School of Pharmacy, Xinxiang University, Xinxiang 453003, P.R. China
| | - Ran Xia
- School of Pharmacy, Xinxiang University, Xinxiang 453003, P.R. China
| | - Kai-Kai Wang
- School of Pharmacy, Xinxiang University, Xinxiang 453003, P.R. China
| | - Lantao Liu
- College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, Henan 476000, P. R. China
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24
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Zhang G, Liang Q, Yang W, Jiang S, Wang Z, Zhang C, Zhang G. One Pot Synthesis of 1,2‐Disubstituted Ethanones by Base‐Mediated Reductive Homocoupling of Aldehydes. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Guohui Zhang
- Qingdao University of Science and Technology CHINA
| | | | - Wei Yang
- Institute of Coal Chemistry CAS CHINA
| | | | - Zhiping Wang
- Qingdao University of Science and Technology CHINA
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25
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DFT rationalization of metal-catalyst-controlled coupling of carbazole with diazo-naphthalen-2(1H)-one. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Pei C, Koenigs RM. A Computational Study on the Photochemical O-H Functionalization of Alcohols with Diazoacetates. J Org Chem 2022; 87:6832-6837. [PMID: 35500213 DOI: 10.1021/acs.joc.2c00513] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In this computational study, we provide a detailed analysis of the underlying reaction mechanism and show that a singlet carbene is initially formed. Depending on the pKA of the alcohol, this singlet carbene can engage in direct protonation or enol formation to yield the O-H functionalization product. On the contrary, propargylic alcohols take up a dual role and form a complex with the carbene intermediate that leads to facile cyclopropenation reactions.
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Affiliation(s)
- Chao Pei
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Rene M Koenigs
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
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27
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Zhang H, Wang Z, Wang Z, Chu Y, Wang S, Hui XP. Visible-Light-Mediated Formal Carbene Insertion Reaction: Enantioselective Synthesis of 1,4-Dicarbonyl Compounds Containing All-Carbon Quaternary Stereocenter. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00064] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hua Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Zheyuan Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Zirui Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yunpeng Chu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Shuncheng Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xin-Ping Hui
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China
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28
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Gallardo GM, Ventura DJ, Petit AS. Computationally Probing the Mechanism of the Blue-Light-Driven O–H Functionalization of Alcohols by Aryldiazoacetates: Photobasicity or Carbene Chemistry. J Org Chem 2022; 87:6212-6223. [DOI: 10.1021/acs.joc.2c00442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Geovanny M. Gallardo
- Department of Chemistry and Biochemistry, California State University─Fullerton, Fullerton, California 92834-6866, United States
| | - Damian J. Ventura
- Department of Chemistry and Biochemistry, California State University─Fullerton, Fullerton, California 92834-6866, United States
| | - Andrew S. Petit
- Department of Chemistry and Biochemistry, California State University─Fullerton, Fullerton, California 92834-6866, United States
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29
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Stivanin ML, Gallo RDC, Spadeo JPM, Cormanich RA, Jurberg ID. A Visible Light-Mediated Three-Component Strategy Based on the Ring-Opening of Cyclic Ethers with Aryldiazoacetates and Nucleophiles. Org Chem Front 2022. [DOI: 10.1039/d1qo01780b] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A blue light-promoted reaction between aryldiazoacetates and different nucleophiles has been developed in the presence of THF (and other cyclic ethers) as solvent, allowing the incorporation of these three elements...
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30
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Empel C, Pei C, Koenigs RM. Unlocking novel reaction pathways of diazoalkanes with visible light. Chem Commun (Camb) 2022; 58:2788-2798. [DOI: 10.1039/d1cc06521a] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photochemistry has recently attracted the interest of synthetic chemists to conduct photolysis reactions of diazoalkanes. In this feature article, we provide a concise overview on this field, starting with discoveries...
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31
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Shojaei H, Bossi ML, Belov VN, Hell SW. Bis-Rhodamines Bridged with a Diazoketone Linker: Synthesis, Structure, and Photolysis. J Org Chem 2021; 87:56-65. [PMID: 34919387 PMCID: PMC8749961 DOI: 10.1021/acs.joc.1c01721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
![]()
Two fluorophores
bound with a short photoreactive bridge are fascinating
structures and remained unexplored. To investigate the synthesis and
photolysis of such dyes, we linked two rhodamine dyes via a diazoketone
bridge (−COCN2−) attached to position 5′
or 6′ of the pendant phenyl rings. For that, the mixture of
5′- or 6′-bromo derivatives of the parent dye was prepared,
transformed into 1,2-diarylacetylenes, hydrated to 1,2-diarylethanones,
and converted to diazoketones Ar1COCN2Ar2. The high performance liquid chromatography (HPLC) separation
gave four individual regioisomers of Ar1COCN2Ar2. Photolysis of the model compound—C6H5COCN2C6H5—in
aqueous acetonitrile at pH 7.3 and under irradiation with 365 nm light
provided diphenylacetic acid amide (Wolff rearrangement). However,
under the same conditions, Ar1COCN2Ar2 gave mainly α-diketones Ar1COCOAr2.
The migration ability of the very bulky dye residues was low, and
the Wolff rearrangement did not occur. We observed only moderate fluorescence
increase, which may be explained by the insufficient quenching ability
of diazoketone bridge (−COCN2−) and its transformation
into another (weaker) quencher, 1,2-diarylethane-1,2-dione.
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Affiliation(s)
- Heydar Shojaei
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry (MPIBPC), 37077 Göttingen, Germany
| | - Mariano L Bossi
- Department of Optical Nanoscopy, Max Planck Institute for Medical Research, 69120 Heidelberg, Germany
| | - Vladimir N Belov
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry (MPIBPC), 37077 Göttingen, Germany
| | - Stefan W Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry (MPIBPC), 37077 Göttingen, Germany.,Department of Optical Nanoscopy, Max Planck Institute for Medical Research, 69120 Heidelberg, Germany
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32
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Stivanin ML, Duarte M, Leão LPMO, Saito FA, Jurberg ID. Visible-Light-Mediated Strategies for the Preparation of Oxime Ethers Derived from O-H Insertions of Oximes into Aryldiazoacetates. J Org Chem 2021; 86:17528-17532. [PMID: 34793163 DOI: 10.1021/acs.joc.1c02411] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Two visible-light-mediated O-H insertion protocols involving oximes and aryldiazoacetates leading to different products depending on the solvent employed are reported. In DCM, direct O-H insertion takes place. In THF, there is the additional incorporation of the ring-opened form of this solvent into the structure of the product. These metal-free protocols are mild and tolerant to air and moisture. The preparation of an acaricide has been developed as an example of synthetic application.
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Affiliation(s)
- Mateus L Stivanin
- State University of Campinas, Institute of Chemistry, Rua Monteiro Lobato 270, 13083-862, Campinas, SP, Brazil
| | - Marcelo Duarte
- State University of Campinas, Institute of Chemistry, Rua Monteiro Lobato 270, 13083-862, Campinas, SP, Brazil
| | - Luiz Paulo M O Leão
- State University of Campinas, Institute of Chemistry, Rua Monteiro Lobato 270, 13083-862, Campinas, SP, Brazil
| | - Felipe A Saito
- State University of Campinas, Institute of Chemistry, Rua Monteiro Lobato 270, 13083-862, Campinas, SP, Brazil
| | - Igor D Jurberg
- State University of Campinas, Institute of Chemistry, Rua Monteiro Lobato 270, 13083-862, Campinas, SP, Brazil
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33
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Visible-Light-Mediated Strategies to Assemble Alkyl 2-Carboxylate-2,3,3-Trisubstituted β-Lactams and 5-Alkoxy-2,2,4-Trisubstituted Furan-3(2H)-ones Using Aryldiazoacetates and Aryldiazoketones. Org Lett 2021; 23:9292-9296. [PMID: 34797682 DOI: 10.1021/acs.orglett.1c03662] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Two new visible-light-mediated strategies are described starting from aryldiazoacetates. The first approach describes their reaction with azides to afford the corresponding imines, and then reaction with aryldiazoketones produces alkyl 2-carboxylate-2,3,3-trisubstituted β-lactams. The second approach describes the reaction with sulfoxides to afford the corresponding sulfoxonium ylides, followed by reaction with aryldiazoketones to produce 5-alkoxy-2,2,4-trisubstituted furan-3(2H)-ones. These protocols take advantage of the photolysis of aryldiazoacetates and the photochemically promoted Wolff rearrangement of aryldiazoketones.
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34
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Gallo RDC, Duarte M, da Silva AF, Okada CY, Deflon VM, Jurberg ID. A Selective C-C Bond Cleavage Strategy Promoted by Visible Light. Org Lett 2021; 23:8916-8920. [PMID: 34730986 DOI: 10.1021/acs.orglett.1c03406] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new visible-light-promoted reaction between aryldiazoacetates and 1,3-diketones allows good yields and selectivities for C-C bond insertions, leading to the corresponding 1,4-dicarbonyl compounds. This transformation is straightforward and highly practical. It tolerates air and moisture and does not require the use of any metals. Mechanistic investigations support the involvement of a key cyclopropanol intermediate derived from an intramolecular rearrangement.
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Affiliation(s)
- Rafael D C Gallo
- State University of Campinas, Institute of Chemistry, Rua Monteiro Lobato 270, 13083-862 Campinas, São Paulo, Brazil
| | - Marcelo Duarte
- State University of Campinas, Institute of Chemistry, Rua Monteiro Lobato 270, 13083-862 Campinas, São Paulo, Brazil
| | - Amanda F da Silva
- State University of Campinas, Institute of Chemistry, Rua Monteiro Lobato 270, 13083-862 Campinas, São Paulo, Brazil
| | - Celso Y Okada
- State University of Campinas, Institute of Chemistry, Rua Monteiro Lobato 270, 13083-862 Campinas, São Paulo, Brazil
| | - Victor M Deflon
- University of São Paulo, Institute of Chemistry of São Carlos, Av. Trabalhador São-Carlense 400, 13566-590 São Carlos, São Paulo, Brazil
| | - Igor D Jurberg
- State University of Campinas, Institute of Chemistry, Rua Monteiro Lobato 270, 13083-862 Campinas, São Paulo, Brazil
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35
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Deng Y, Yang T, Wang H, Yang C, Cheng L, Yin SF, Kambe N, Qiu R. Recent Progress on Photocatalytic Synthesis of Ester Derivatives and Reaction Mechanisms. Top Curr Chem (Cham) 2021; 379:42. [PMID: 34668085 DOI: 10.1007/s41061-021-00355-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 10/05/2021] [Indexed: 11/28/2022]
Abstract
Esters and their derivatives are distributed widely in natural products, pharmaceuticals, fine chemicals and other fields. Esters are important building blocks in pharmaceuticals such as clopidogrel, methylphenidate, fenofibrate, travoprost, prasugrel, oseltamivir, eszopiclone and fluticasone. Therefore, esterification reaction becomes more and more popular in the photochemical field. In this review, we highlight three types of reactions to synthesize esters using photochemical strategies. The reaction mechanisms involve mainly single electron transfer, energy transfer or other radical procedures.
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Affiliation(s)
- Yiqiang Deng
- College of Chemical Engineering, Key Laboratory of Inferior Crude Oil Upgrade Processing of Guangdong Provincial Higher Education Institutes, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong, China.
| | - Tianbao Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Hui Wang
- College of Chemical Engineering, Key Laboratory of Inferior Crude Oil Upgrade Processing of Guangdong Provincial Higher Education Institutes, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong, China
| | - Chong Yang
- College of Chemical Engineering, Key Laboratory of Inferior Crude Oil Upgrade Processing of Guangdong Provincial Higher Education Institutes, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong, China
| | - Lihua Cheng
- College of Chemical Engineering, Key Laboratory of Inferior Crude Oil Upgrade Processing of Guangdong Provincial Higher Education Institutes, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong, China
| | - Shuang-Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Nobuaki Kambe
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Renhua Qiu
- College of Chemical Engineering, Key Laboratory of Inferior Crude Oil Upgrade Processing of Guangdong Provincial Higher Education Institutes, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong, China. .,State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
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36
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Abstract
Herein, we report on the tris(pentafluorophenyl)borane-catalyzed reaction of carbazole heterocycles with aryldiazoacetates. We could demonstrate that selective N-H functionalization occurs in the case of an unprotected carbazole, other N-heterocycles, and secondary amines in good yields. In contract, the protected carbazole undergoes C-H functionalization at the C-3 position in a good yield. The application of both approaches was studied in 41 examples with up to a 97% yield.
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Affiliation(s)
- Feifei He
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Rene M Koenigs
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
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37
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Zhao Y, Mandal D, Guo J, Wu Y, Stephan DW. B(C 6F 5) 3-Catalyzed site-selective N1-alkylation of benzotriazoles with diazoalkanes. Chem Commun (Camb) 2021; 57:7758-7761. [PMID: 34254070 DOI: 10.1039/d1cc03048e] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alkylation of benzotriazoles is synthetically challenging, often leading to mixtures of N1 and N2 alkylation. Herein, metal-free catalytic site-selective N1-alkylation of benzotriazoles with diazoalkanes is described in the presence of 10 mol% of B(C6F5)3. These reactions provide N1-alkylated benzotriazoles in good to excellent yields and this protocol is successfully adapted to gram-scale syntheses as well as a derivative with antimicrobial activity.
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Affiliation(s)
- Yunbo Zhao
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Dipendu Mandal
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Jing Guo
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Yile Wu
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Douglas W Stephan
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China. and Department of Chemistry, University of Toronto, Toronto, 80 St. George Street, Ontario M5S 3H6, Canada.
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38
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Visible light and base promoted O-H insertion/cyclization of para-quinone methides with aryl diazoacetates: An approach to 2,3-dihydrobenzofuran derivatives. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.03.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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39
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Wu YB, Wu YZ, Wu J, Xu D, Jiang H, Chang WW, Ma CY. Copper-Catalyzed Regioselective Coupling of Tosylhydrazones and 2-Pyridones: A Strategy for the Production of N-Alkylated Compounds. J Org Chem 2021; 86:6918-6926. [PMID: 33852298 DOI: 10.1021/acs.joc.1c00009] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The highly regioselective N-alkylation reaction of 2-pyridones was achieved through hydrazone chemistry, especially for substrates with bulky secondary alkyl groups. Described herein is a copper-catalyzed coupling reaction of pyridone derivatives with tosylhydrazones.
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Affiliation(s)
- Ye-Bin Wu
- Nanjing Chia Tai-Tianqing Pharmaceutical Co., Ltd., Hengguang Road No. 99-1, Qixia Nanjing, Jiangsu 210046, People's Rupublic of China
| | - You-Zhi Wu
- Nanjing Chia Tai-Tianqing Pharmaceutical Co., Ltd., Hengguang Road No. 99-1, Qixia Nanjing, Jiangsu 210046, People's Rupublic of China
| | - Jian Wu
- Nanjing Chia Tai-Tianqing Pharmaceutical Co., Ltd., Hengguang Road No. 99-1, Qixia Nanjing, Jiangsu 210046, People's Rupublic of China
| | - Dan Xu
- Nanjing Chia Tai-Tianqing Pharmaceutical Co., Ltd., Hengguang Road No. 99-1, Qixia Nanjing, Jiangsu 210046, People's Rupublic of China
| | - Hui Jiang
- Pharmaron (Shang Hai), Jinke Road No. 2727, Shang Hai 201203, People's Rupublic of China
| | - Wen-Wu Chang
- Pharmaron (Shang Hai), Jinke Road No. 2727, Shang Hai 201203, People's Rupublic of China
| | - Chang-You Ma
- Nanjing Chia Tai-Tianqing Pharmaceutical Co., Ltd., Hengguang Road No. 99-1, Qixia Nanjing, Jiangsu 210046, People's Rupublic of China
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40
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Guha S, Gadde S, Kumar N, Black DS, Sen S. Orthogonal Syntheses of γ-Carbolinone and Spiro[pyrrolidinone-3,3']indole Derivatives in One Pot through Reaction Telescoping. J Org Chem 2021; 86:5234-5244. [PMID: 33720725 DOI: 10.1021/acs.joc.1c00141] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Herein we report a series of telescoping methodologies for one pot synthesis of biologically relevant γ-carboline derivatives 6 and spiro[pyrrolidinone-3,3']indole 7. Initially the three consecutive steps of cyclopropanation, phthalimide deprotection, and Boc-deprotection have been congregated in a single reaction vessel to afford a ∼1:1 mixture of 6 and 7. Next, careful optimization of the reaction sequence and the conditions generated an orthogonal approach to access compounds 6 and 7 exclusively. Air oxidation of the γ-carbolinones 6 afforded aromatic γ-carbolines 8.
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Affiliation(s)
- Souvik Guha
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri, Chithera, Gautambudh Nagar, UP 201314, India
| | | | - Naresh Kumar
- School of Chemistry, UNSW Sydney, Sydney, NSW 2052, Australia
| | | | - Subhabrata Sen
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri, Chithera, Gautambudh Nagar, UP 201314, India
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41
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42
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Maiti D, Das R, Sen S. Blue LED-Mediated N-H Insertion of Indoles into Aryldiazoesters at Room Temperature in Batch and Flow: Reaction Kinetics, Density Functional Theory, and Mechanistic Study. J Org Chem 2021; 86:2522-2533. [PMID: 33417455 DOI: 10.1021/acs.joc.0c02649] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Mild blue light-mediated N-H insertion of indole and its derivatives into aryldiazoesters has been reported in a batch and flow strategy to afford the corresponding N-alkylated product in moderate-to-excellent yield. Detailed high-performance liquid chromatography-based reaction kinetics measurements, control experiments, and kinetic isotope effect reveal that 3-substituted indoles with electron-withdrawing groups such as -CN and -CHO facilitated the product formation, whereas the electron-donating group retarded the process. The neutral indole performed in between them. Furthermore, Hammett plot and density functional theory-based transition-state optimization studies showed substantial correlation of the electronic nature of the substituents at the C3 position of indoles with the rate of the N-H insertion reaction. The strategy was utilized to synthesize a key intermediate for the natural product (-)-psychotrimine.
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Affiliation(s)
- Debajit Maiti
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri, Chithera, Gautam Budh Nagar, Greater Noida, Uttar Pradesh 201314, India
| | - Ranajit Das
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri, Chithera, Gautam Budh Nagar, Greater Noida, Uttar Pradesh 201314, India
| | - Subhabrata Sen
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri, Chithera, Gautam Budh Nagar, Greater Noida, Uttar Pradesh 201314, India
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43
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Yang J, Wang G, Zhou H, Li Z, Ma B, Song M, Sun R, Huo C. Visible-light-promoted selective O-alkylation of 2-pyridones with α-aryldiazoacetates. Org Biomol Chem 2021; 19:394-398. [PMID: 33325960 DOI: 10.1039/d0ob02350g] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A visible-light-promoted O-H insertion reaction between 2-pyridones and α-aryldiazoacetates has been developed. Upon visible light irradiation, the reaction proceeds smoothly under mild and catalyst-free conditions. A wide scope of 2-pyridones and α-aryldiazoacetates are well tolerated, and various O-alkylated 2-pyridones are obtained with perfect selectivity and good functional group tolerance. A photoinduced radical process is probably responsible for the excellent selectivity.
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Affiliation(s)
- Jingya Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Ganggang Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Hongyan Zhou
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. and College of Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Zhifeng Li
- College of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741000, China
| | - Ben Ma
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Menghui Song
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Rongxia Sun
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Congde Huo
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
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44
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Zhang Z, He Z, Xie Y, He T, Fu Y, Yu Y, Huang F. Brønsted acid-catalyzed homogeneous O–H and S–H insertion reactions under metal- and ligand-free conditions. Org Chem Front 2021. [DOI: 10.1039/d0qo01401j] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The economical and accessible CF3SO3H successfully catalyzed homogeneous O–H and S–H bond insertion reactions between hydroxyl compounds, thiols and diazo compounds under metal- and ligand-free conditions.
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Affiliation(s)
- Zhipeng Zhang
- School of Food Science and Pharmaceutical Engineering
- Nanjing Normal University
- Nanjing 210023
- P. R. China
- School of Biology and Biological Engineering
| | - Zhiqin He
- School of Food Science and Pharmaceutical Engineering
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Yuxing Xie
- School of Food Science and Pharmaceutical Engineering
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Tiantong He
- School of Pharmaceutical Sciences
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Yaofeng Fu
- School of Pharmaceutical Sciences
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Yang Yu
- School of Environmental Science and Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Fei Huang
- School of Food Science and Pharmaceutical Engineering
- Nanjing Normal University
- Nanjing 210023
- P. R. China
- School of Pharmaceutical Sciences
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45
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Ji X, Zhang Z, Wang Y, Han Y, Peng H, Li F, Liu L. Catalyst-free synthesis of α,α-disubstituted carboxylic acid derivatives under ambient conditions via a Wolff rearrangement reaction. Org Chem Front 2021. [DOI: 10.1039/d1qo01265g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Herein, a hexafluoroisopropanol (HFIP)-promoted Wolff rearrangement reaction was developed, delivering various α,α-disubstituted carboxylic acid derivatives in good to excellent yields.
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Affiliation(s)
- Xin Ji
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Zhikun Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Yuzhu Wang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Yazhe Han
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Huiling Peng
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Fangzhu Li
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Lu Liu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, P. R. China
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46
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Cai B, Xuan J. Visible Light-Promoted Transformation of Diazo Compounds via the Formation of Free Carbene as Key Intermediate. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202109040] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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47
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Bera SS, Bahukhandi SB, Empel C, Koenigs RM. Catalyst-controlled site-selective N-H and C3-arylation of carbazole via carbene transfer reactions. Chem Commun (Camb) 2021; 57:6193-6196. [PMID: 34048520 DOI: 10.1039/d1cc01863a] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A site-selective direct arylation reaction of carbazole and other N-heterocycles with diazo-naphthalen-2(1H)-ones has been developed. While Au(i)-NHC catalysts lead to selective C3-arylation, palladium acetate allows for selective N-H arylation, displaying complete site-selectivity each. To show the applicability of these arylation reactions, one-pot, two-fold diarylation reactions of carbazole were demonstrated.
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Affiliation(s)
- Sourav Sekhar Bera
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, Aachen D-52074, Germany.
| | | | - Claire Empel
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, Aachen D-52074, Germany.
| | - Rene M Koenigs
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, Aachen D-52074, Germany.
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48
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Ye C, Cai BG, Lu J, Cheng X, Li L, Pan ZW, Xuan J. Visible-Light-Promoted Polysubstituted Olefins Synthesis Involving Sulfur Ylides as Carbene Trapping Reagents. J Org Chem 2020; 86:1012-1022. [PMID: 33301327 DOI: 10.1021/acs.joc.0c02500] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A blue-light-emitting diode (LED) promoted coupling of aryl diazoacetates with sulfur ylides is described. This protocol features mild conditions, good functional group tolerance, and broad substrate scope for both aryl diazoacetates with sulfur ylides. Under optimal reaction conditions, a wide range of trisubstituted olefins is obtained in moderate to good yield, which can be further transferred to other biologically important heterocycles after a two-step simple operation.
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Affiliation(s)
- Cong Ye
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Bao-Gui Cai
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Juan Lu
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Xiao Cheng
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Lei Li
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Zhong-Wen Pan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China.,Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, People's Republic of China
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49
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Okada CY, dos Santos CY, Jurberg ID. Blue light-promoted N–H insertion of amides, isatins, sulfonamides and imides into aryldiazoacetates: Synthesis of unnatural α-aryl amino acid derivatives. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131316] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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50
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Chen P, Nan J, Hu Y, Kang Y, Wang B, Ma Y, Szostak M. Metal-free tandem carbene N-H insertions and C-C bond cleavages. Chem Sci 2020; 12:803-811. [PMID: 34163814 PMCID: PMC8178978 DOI: 10.1039/d0sc05763k] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 11/09/2020] [Indexed: 01/16/2023] Open
Abstract
A metal-free C-H [5 + 1] annulation reaction of 2-arylanilines with diazo compounds has been achieved, giving rise to two types of prevalent phenanthridines via highly selective C-C cleavage. Compared to the simple N-H insertion manipulation of diazo, this method elegantly accomplishes a tandem N-H insertion/SEAr/C-C cleavage/aromatization reaction, and the synthetic utility of this new transformation is exemplified by the succinct syntheses of trisphaeridine and bicolorine alkaloids.
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Affiliation(s)
- Pu Chen
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Jiang Nan
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Yan Hu
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Yifan Kang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Bo Wang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Yangmin Ma
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Michal Szostak
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
- Department of Chemistry, Rutgers University 73 Warren Street Newark New Jersey 07102 USA
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