1
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Li X, Cheng H, Shao J, Zhang G, Zhang S. Rh(III)-Catalyzed [4 + 1] Annulation of Benzamides with Vinyl Cyclic Carbonates for the Synthesis of Isoindolinones. Org Lett 2024; 26:1304-1309. [PMID: 38329782 DOI: 10.1021/acs.orglett.3c03899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
A Rh(III)-catalyzed C-H bond activation and subsequent [4+1] annulation of benzamides with vinyl cyclic carbonates have been developed for the synthesis of isoindolinones, in which the electron-rich alkenes could serve as one-carbon units. This reaction proceeds smoothly with high regioselectivity under oxidant- and silver-free conditions and exhibits broad substrate scope and functional group tolerance including some biological active materials. The scale-up reaction and derivatizations of the product further demonstrate the potential synthetic utility of this transformation.
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Affiliation(s)
- Xiang Li
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China
| | - Hang Cheng
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China
| | - Jianghao Shao
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China
| | - Guodong Zhang
- College of Chemistry and Chemical Engineering, Yangzhou University, 180 Siwangting Road, Yangzhou, Jiangsu 225002, China
| | - Shuilong Zhang
- Shanghai Xchemtech Co., Ltd., 116 Cheyang Road, Songjiang district, Shanghai 201611, China
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2
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Zhu M, Zhu M, Wei F, Shao C, Li X, Liu B. Synthesis of Bridged Cycloisoxazoline Scaffolds via Rhodium-Catalyzed Coupling of Nitrones with Cyclic Carbonate. J Org Chem 2023; 88:16330-16339. [PMID: 37966420 DOI: 10.1021/acs.joc.3c01840] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Bridged isoxazolidines were synthesized via Rh(III)-catalyzed C-H allylation of α-aryl nitrones with 5-methylene-1,3-dioxan-2-one. The nitrone group serves as a directing group and 1,3-dipole in the C-H activation/[3 + 2] cycloaddition cascade, exhibiting excellent chemo- and stereoselectivity along with good functional group compatibility. The resulting skeletal structure was conveniently modified to produce a range of important chemical frameworks, and the protocol was applied to biologically active molecules.
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Affiliation(s)
- Man Zhu
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Mengdie Zhu
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Fangjie Wei
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Chongjing Shao
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xingwei Li
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Bingxian Liu
- State Key Laboratory of Antiviral Drugs, Pingyuan Laboratory, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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3
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Zhou R, Fan S, Fang L, Chu B, Zhu J. Rh(III)-Catalyzed N-Amino-Directed C-H Coupling with 3-Methyleneoxetan-2-ones for 1,2-Dihydroquinoline-3-carboxylic Acid Synthesis. Org Lett 2023. [PMID: 37996082 DOI: 10.1021/acs.orglett.3c03610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Dynamic polarity analysis is proposed herein as a general tool for investigating static polarity and transient polarity and revealing expanded reactivity patterns. Through this analysis formalism, polarity matching has been established for Rh(III)-catalyzed N-amino-directed C-H coupling with 3-methyleneoxetan-2-ones, providing efficient access to 1,2-dihydroquinoline-3-carboxylic acids. The identified reaction, by virtue of the internal oxidative mechanism, showcases mild reaction conditions (room temperature), a short reaction time (2 h), and a generally high product yield.
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Affiliation(s)
- Renpeng Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Shuaixin Fan
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Lili Fang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Benfa Chu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
| | - Jin Zhu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, China
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4
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Xue L, Song X, Zhang X, Fan X. Synthesis of O-Heterocycle Spiro-Fused Cyclopentaquinolinones and Cyclopentaindenes through Visible Light-Induced Radical Cyclization Reactions. J Org Chem 2023; 88:12641-12657. [PMID: 37591490 DOI: 10.1021/acs.joc.3c01317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Presented herein is an effective and sustainable synthesis of O-heterocycle spiro-fused cyclopentaquinolinone and cyclopentaindene derivatives through light-driven cascade reactions of N-(o-ethynylaryl)acrylamides or 2-(2-(phenylethynyl)benzyl)acrylate with various O-heterocycles. Experimental mechanistic studies revealed that these reactions are initiated by visible light-induced radical formation from O-heterocycle and its regioselective addition onto the acrylamide or acrylate moiety followed by 6-exo-dig and 5-endo-trig cascade radical annulation, which is terminated by single electron oxidation and proton elimination. Compared with previously reported synthetic methods for similar purposes, this newly developed protocol has advantages such as a broad substrate scope, extremely mild reaction conditions, excellent atom-economy, high efficiency, and good compatibility with diverse functional groups. With all of these merits, this method is expected to find wide applications in the related research arena.
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Affiliation(s)
- Lian Xue
- Pingyuan Laboratory, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xia Song
- Pingyuan Laboratory, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xinying Zhang
- Pingyuan Laboratory, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
| | - Xuesen Fan
- Pingyuan Laboratory, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P. R. China
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5
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Bhaduri N, Pawar AB. Redox-neutral C-H annulation strategies for the synthesis of heterocycles via high-valent Cp*Co(III) catalysis. Org Biomol Chem 2023; 21:3918-3941. [PMID: 37128760 DOI: 10.1039/d3ob00133d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A variety of biologically active molecules, pharmaceuticals, and natural products consist of a nitrogen-containing heterocyclic backbone. The majority of them are isoquinolones, indoles, isoquinolines, etc.; thereby the synthesis and derivatization of such heterocycles are synthetically very relevant. Also, certain naphthol derivatives have high synthetic utility as agrochemicals and in dye industries. Previous approaches have utilized ruthenium, rhodium, or iridium which may not be desirable due to the high toxicity, low abundance, and high cost of such 4d and 5d metals. Moreover, the need for an external oxidant during the reaction also adds by-products to the system. A high-valent cobalt-catalyzed redox-neutral C-H functionalization strategy has emerged to be a far better alternative in this regard. The use of the non-noble metal cobalt allows for selectivity and specificity in product formation. Also, the redox-neutral concept avoids the use of an external oxidant either due to the presence of a metal in a non-variable oxidation state throughout the catalytic cycle or due to the presence of an oxidizing directing group or an oxidizing coupling partner. Such an oxidizing directing group not only directs the catalyst to a specific reaction site by chelation but also regenerates the catalyst at the end of the cycle. Certain bonds such as N-O, N-N, N-Cl, N-S, and C-S are the main game-players behind the oxidizing property of such directing groups. In the other case, the directing group only chelates the catalyst to a reaction center, whereas the oxidation is carried out by the upcoming group/coupling partner. Overall, merging the redox-neutral concept with the high-valent cobalt catalysis is paving the way forward toward a sustainable and environmentally friendly approach. This review critically describes the mechanistic understanding, scope, limitations, and synthesis of various biologically relevant heterocycles via the redox-neutral concept in the high-valent Cp*Co(III)-catalyzed C-H functionalization chemistry domain.
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Affiliation(s)
- Nilanjan Bhaduri
- School of Chemical Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh, 175005, India.
| | - Amit B Pawar
- School of Chemical Sciences, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh, 175005, India.
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6
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Rana G, Kar A, Kundal S, Musib D, Jana U. DDQ/Fe(NO 3) 3-Catalyzed Aerobic Synthesis of 3-Acyl Indoles and an In Silico Study for the Binding Affinity of N-Tosyl-3-acyl Indoles toward RdRp against SARS-CoV-2. J Org Chem 2023; 88:838-851. [PMID: 36622749 DOI: 10.1021/acs.joc.2c02009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In the present study, we herein report a DDQ-catalyzed new protocol for the synthesis of substituted 3-acylindoles. Being a potential system for virtual hydrogen storage, introduction of catalytic DDQ in combination with Fe(NO3)3·9H2O and molecular oxygen as co-catalysts offers a regioselective oxo-functionalization of C-3 alkyl-/aryllidine indolines even with scale-up investigations. Intermediate isolation, their spectroscopic characterization, and the density functional theory calculations indicate that the method involves dehydrogenative allylic hydroxylation and 1,3-functional group isomerization/aromatization followed by terminal oxidation to afford 3-acylindoles quantitatively with very high regioselectivity. This method is very general for a large number of substrates with varieties of functional groups tolerance emerging high-yield outcome. Moreover, molecular docking studies were performed for some selected ligands with an RNA-dependent RNA polymerase complex (RdRp complex) of SARS-CoV-2 to illustrate the binding potential of those ligands. The docking results revealed that few of the ligands possess the potential to inhibit the RdRp of SARS-Cov-2 with binding energies (-6.7 to -8.19 kcal/mol), which are comparably higher with respect to the reported binding energies of the conventional re-purposed drugs such as Remdesivir, Ribavirin, and so forth (-4 to -7 kcal/mol).
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Affiliation(s)
- Gopal Rana
- Department of Chemistry, Jadavpur University, Kolkata 700 032, West Bengal, India
| | - Abhishek Kar
- Department of Chemistry, Jadavpur University, Kolkata 700 032, West Bengal, India
| | - Sandip Kundal
- Department of Chemistry, Jadavpur University, Kolkata 700 032, West Bengal, India
| | - Dulal Musib
- Department of Chemistry, National Institute of Technology Manipur, Langol, Imphal 795004, Manipur, India
| | - Umasish Jana
- Department of Chemistry, Jadavpur University, Kolkata 700 032, West Bengal, India
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7
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Kumar S, Borkar V, Mujahid M, Nunewar S, Kanchupalli V. Iodonium ylides: an emerging and alternative carbene precursor for C-H functionalizations. Org Biomol Chem 2022; 21:24-38. [PMID: 36416081 DOI: 10.1039/d2ob01644c] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The metal-catalyzed successive activation and functionalization of arene/heteroarene is one of the most fundamental transformations in organic synthesis and leads to privileged scaffolds in natural products, pharmaceuticals, agrochemicals, and fine chemicals. Particularly, transition-metal-catalyzed C-H functionalization of arenes with carbene precursors via metal carbene migratory insertion has been well studied. As a result, diverse carbene precursors have been evaluated, such as diazo compounds, sulfoxonium ylides, triazoles, etc. In addition, there have been significant developments with the use of iodonium ylides as carbene precursors in recent years, and these reactions proceed with high efficiencies and selectivities. This review provides a comprehensive overview of iodonium ylides in C-H functionalizations, including the scope, limitations, and their potential synthetic applications.
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Affiliation(s)
- Sanjeev Kumar
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana, India.
| | - Vaishnavi Borkar
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana, India.
| | - Mohd Mujahid
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana, India.
| | - Saiprasad Nunewar
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana, India.
| | - Vinaykumar Kanchupalli
- Department of Chemical Sciences National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad 500 037, Telangana, India.
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8
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Adhikari A, Bhakta S, Ghosh T. Microwave-assisted synthesis of bioactive heterocycles: An overview. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Yang Z, Tang J, Chen Z, Wu XF. Ruthenium-Catalyzed Hydroxyl-Directed peri-Selective C-H Activation and Annulation of 1-Naphthols with CF 3-Imidoyl Sulfoxonium Ylides for the Synthesis of 2-(Trifluoromethyl)-2,3-dihydrobenzo[ de]chromen-2-amines. Org Lett 2022; 24:7288-7293. [PMID: 36194465 DOI: 10.1021/acs.orglett.2c02685] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A ruthenium-catalyzed peri-selective C-H activation and annulation of 1-naphthols with CF3-substituted imidoyl sulfoxonium ylides that uses hydroxyl as a weakly coordinating directing group is disclosed. The strategy provides a facile and practical route to diverse trifluoromethyl-containing 2,3-dihydrobenzo[de]chromen-2-amines with high efficiency. Notable advantages of this protocol include readily available materials, excellent regioselectivity, good functional group compatibility, and scalability.
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Affiliation(s)
- Zuguang Yang
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Jianhua Tang
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Zhengkai Chen
- Department of Chemistry, Key Laboratory of Surface and Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
| | - Xiao-Feng Wu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China.,Leibniz-Institut für Katalyse e. V., Albert-Einstein-Straβe 29a, 18059 Rostock, Germany
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10
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Peng RJ, Chen L, Zhang XJ, Yan M. Rh(III)‐Catalyzed C‒H Functionalization of <i>N</i>‐Nitrosoanilines with <i>α</i>‐Sulfonylcarbenes. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Wang YZ, Liang PY, Liu HC, Lin WJ, Zhou PP, Yu W. Visible-Light-Driven [3 + 2]/[4 + 2] Annulation Reactions of Alkenes with N-Aminopyridinium Salts. Org Lett 2022; 24:6037-6042. [PMID: 35930310 DOI: 10.1021/acs.orglett.2c02323] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The annulation reactions of benzoamidyl radicals with alkenes were realized under visible light irradiation with fac-Ir(ppy)3 as catalyst and N-aminopyridinium salts as benzoamidyl radical precursors. The reaction can deliver two distinct types of products: in the case of vinyl arenes, [3 + 2] annulation product dihydrooxazoles were yielded exclusively; when alkyl-substituted alkenes were used, on the other hand, it afforded [4 + 2] annulation product dihydroisoquinolinones. Factors determining the reaction consequence were elucidated by DFT calculations.
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Affiliation(s)
- Yu-Zhao Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Peng-Yu Liang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Hong-Chao Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Wu-Jie Lin
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Pan-Pan Zhou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Wei Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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12
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Liu H, Xing R, Ren K, Xue F, Feng C. α-Iminyl Cation-Involved Indole Construction via Brønsted Acid-Promoted Reaction of Isoxazol-5-ones. J Org Chem 2022; 87:11226-11230. [PMID: 35901265 DOI: 10.1021/acs.joc.2c01086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, we report a strategically novel method for the efficient construction of indole skeletons using 2-phenylisoxazol-5-ones as the starting material. This reaction proceeds via Brønsted acid-promoted α-iminyl cation generation by N-O bond cleavage and a subsequent intramolecular cyclization to afford 1H-indole-3-carboxylic acid, which further undergoes decarboxylation to yield the final product. Control experiments show that N-O bond cleavage and intramolecular cyclization proceed so fast that the 1H-indole-3-carboxylic acid could be isolated in high yields even after 5-10 min. The substrate scope of this transformation is broad, and the desired products are obtained in moderate to good yields. The transition-metal-free reaction condition, CO2 as the sole byproduct, and good practicability add to the synthetic potential of this transformation in the pharmaceutical and flavor industries.
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Affiliation(s)
- Haidong Liu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Renyi Xing
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Kewei Ren
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Fei Xue
- Institute of Material Physics & Chemistry, College of Science, Nanjing Forestry University, Nanjing 210037, P. R. China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
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13
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Tan Y, Xuekun W, Han YP, Zhang Y, Zhang HY, Zhao J. Visible-Light-Induced Oxyalkylation of 1,2,4-Triazine-3,5(2 H, 4 H)-diones with Ethers via Oxidative Cross-Dehydrogenative Coupling. J Org Chem 2022; 87:8551-8561. [PMID: 35731594 DOI: 10.1021/acs.joc.2c00669] [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
An efficient and convenient method to synthesize 6-oxyalkylated 1,2,4-triazine-3,5(2H, 4H)-diones has been developed via visible-light-induced cross-dehydrogenative coupling reaction between 1,2,4-triazine-3,5(2H, 4H)-diones and ethers with a wide range of functional group tolerance. The present transformation employs the cheap and low-toxic 2-tert-butylanthraquinone as a metal-free photocatalyst and air as a green oxidant at room temperature. Moreover, this reaction can also be driven by sunlight as a clean energy resource. The synthetic utility of this method is further demonstrated by gram-scale reaction and application in the preparation of key intermediates of bioactive molecules.
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Affiliation(s)
- Yushi Tan
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Wu Xuekun
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Ya-Ping Han
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Yuecheng Zhang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Hong-Yu Zhang
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Jiquan Zhao
- School of Chemical Engineering and Technology, Hebei Provincial Key Lab of Green Chemical Technology & High Efficient Energy Saving, Tianjin Key Laboratory of Chemical Process Safety, Hebei University of Technology, Tianjin 300130, P. R. China
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14
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Shahriari A, Amiri K, Nikbakht A, Rominger F, Bijanzadeh HR, Balalaie S. Synthesis of Pyrrolidin-5-one-2-carboxamides through Cyclization of N-Substituted-2-alleneamides. J Org Chem 2022; 87:7778-7785. [PMID: 35668356 DOI: 10.1021/acs.joc.2c00387] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of pyrrolidin-5-one-2-carboxamides 6a-p has been developed via a one-pot Ugi reaction of allenic acids, primary amines, isocyanides, and aldehydes followed by regioselective cyclization of the resultant N-substituted-2-allenamides with KOt-Bu at room temperature. The cyclization reaction was carried out through a 5-exo-dig approach, which resulted in good yields and high atom-economy under transition-metal-free and mild reaction conditions.
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Affiliation(s)
- Azadeh Shahriari
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box, Tehran 15875-4416, Iran
| | - Kamran Amiri
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box, Tehran 15875-4416, Iran
| | - Ali Nikbakht
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box, Tehran 15875-4416, Iran
| | - Frank Rominger
- Organisch-Chemisches Institut der Universität Heidelberg, Im Neuenheimer Feld 270, Heidelberg D-69120, Germany
| | - Hamid Reza Bijanzadeh
- Department of Environmental Sciences, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, P.O.Box, Noor 46414-356, Iran
| | - Saeed Balalaie
- Peptide Chemistry Research Institute, K. N. Toosi University of Technology, P.O. Box, Tehran 15875-4416, Iran
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15
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Dhara HN, Rakshit A, Alam T, Patel BK. Metal-catalyzed reactions of organic nitriles and boronic acids to access diverse functionality. Org Biomol Chem 2022; 20:4243-4277. [PMID: 35552581 DOI: 10.1039/d2ob00288d] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The nitrile or cyano (-CN) group is one of the most appreciated and effective functional groups in organic synthesis, having a polar unsaturated C-N triple bond. Despite sufficient stability and being intrinsically inert, the nitrile group can be easily transformed into many other functional groups, such as amines, carboxylic acids, ketones, etc. which makes it a vital group in organic synthesis. On the other hand, despite several boronic acids having a low level of genotoxicity, they have found wide applicability in the field of organic synthesis, especially in transition metal-catalyzed cross-coupling reactions. Recently, transition-metal-catalyzed cascade additions or addition/cyclization processes of boronic acids to the nitrile group open up exciting and useful strategies to prepare a variety of functional molecules through the formation of C-C, C-N and CO bonds. Boronic acids can be added to the cyano functionality through catalytic carbometallation or through a radical cascade process to provide newer pathways for the rapid construction of various important acyclic ketones or amides, carbamidines, carbocycles and N,O-heterocycles. The present review focuses on various transition-metal-catalyzed additions of boronic acids via carbometallation or radical cascade processes using the cyano group as an acceptor.
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Affiliation(s)
- Hirendra Nath Dhara
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
| | - Amitava Rakshit
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
| | - Tipu Alam
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
| | - Bhisma K Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.
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16
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Cariello Silva G, de Souza GFP, Salles AG. Catalytic redox-neutral C-H functionalisation with TEMPO in water to access aminomethyl-substituted pyrroles. Org Biomol Chem 2022; 20:3495-3500. [PMID: 35416824 DOI: 10.1039/d2ob00574c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A redox-neutral C-H functionalisation in water employing catalytic TEMPO to synthesize aminomethyl-substituted pyrroles is reported. Starting from cheap and commercial chemical feedstocks (ketoesters and anilines), our approach delivered targeted products in good yields and represents an endeavour to address redox economy in radical transformations.
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Affiliation(s)
- Guilherme Cariello Silva
- Department of Organic Chemistry, Institute of Chemistry, University of Campinas, P.O. Box 6154, Campinas, SP 13084-862, Brazil.
| | - Gabriela F P de Souza
- Department of Organic Chemistry, Institute of Chemistry, University of Campinas, P.O. Box 6154, Campinas, SP 13084-862, Brazil.
| | - Airton G Salles
- Department of Organic Chemistry, Institute of Chemistry, University of Campinas, P.O. Box 6154, Campinas, SP 13084-862, Brazil.
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17
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Paik A, Paul S, Bhowmik S, Das R, Naveen T, Rana S. Recent Advances in First Row Transition Metal Mediated C‐H Halogenation of (Hetero)arenes and Alkanes. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Aniruddha Paik
- University of North Bengal Department of Chemistry Raja Rammohunpur, DarjeelingWest Bengal, India - 734013 734013 Siliguri INDIA
| | - Sabarni Paul
- University of North Bengal Department of Chemistry Raja Rammohunpur, DarjeelingWest Bengal, India - 734013 734013 Siliguri INDIA
| | - Sabyasachi Bhowmik
- University of North Bengal Department of Chemistry Raja Rammohunpur, DarjeelingWest Bengal, India - 734013 734013 Siliguri INDIA
| | - Rahul Das
- University of North Bengal Department of Chemistry Raja Rammohunpur, DarjeelingWest Bengal, India - 734013 734013 Siliguri INDIA
| | - Togati Naveen
- Sardar Vallabhbhai National Institute of Technology Department of Chemistry 395007 Surat INDIA
| | - Sujoy Rana
- University of North Bengal Chemistry Raja Rammohunpur, DarjeelingWest Bengal, India, 734013 734013 Siliguri INDIA
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18
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Font M, Gulías M, Mascareñas JL. Transition‐Metal‐Catalyzed Annulations Involving the Activation of C(sp
3
)−H Bonds. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Marc Font
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - Moisés Gulías
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
| | - José Luis Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) Departamento de Química Orgánica Universidade de Santiago de Compostela 15782 Santiago de Compostela Spain
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19
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Xia F, Lu YQ, Sun P, Guo QY, Shi QL, Zhang JZ, Qiu C. A formal [4 + 2] annulation of diamines and prop-2-ynyl sulfonium salts for the synthesis of tetrahydroquinoxalines. Org Biomol Chem 2022; 20:8415-8419. [DOI: 10.1039/d2ob01590k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A formal [4 + 2] annulation of diamines and prop-2-ynyl sulfonium salts was developed.
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Affiliation(s)
- Fei Xia
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Yu-Qian Lu
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Peng Sun
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Qiu-Yan Guo
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Qiao-Li Shi
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Jun-Zhe Zhang
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Chong Qiu
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
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20
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Liu J, Xiao X, Lai Y, Zhang Z. Recent advances in transition metal-catalyzed heteroannulative difunctionalization of alkenes via C-H activation for the synthesis of heterocycles. Org Chem Front 2022. [DOI: 10.1039/d2qo00081d] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heterocyclic compounds are the fundamental structural motifs distributed in natural products, pharmaceuticals and biologically active compounds. Thus, there is increasing interest in the development of novel synthetic strategies for the...
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21
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Font M, Gulías M, Mascareñas JL. Transition-Metal-Catalyzed Annulations Involving the Activation of C(sp 3 )-H Bonds. Angew Chem Int Ed Engl 2021; 61:e202112848. [PMID: 34699657 PMCID: PMC9300013 DOI: 10.1002/anie.202112848] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Indexed: 12/15/2022]
Abstract
The selective functionalization of C(sp3)−H bonds using transition‐metal catalysis is among the more attractive transformations of modern synthetic chemistry. In addition to its inherent atom economy, such reactions open unconventional retrosynthetic pathways that can streamline synthetic processes. However, the activation of intrinsically inert C(sp3)−H bonds, and the selection among very similar C−H bonds, represent highly challenging goals. In recent years there has been notable progress tackling these issues, especially with regard to the development of intermolecular reactions entailing the formation of C−C and C−heteroatom bonds. Conversely, the assembly of cyclic products from simple acyclic precursors using metal‐catalyzed C(sp3)−H bond activations has been less explored. Only recently has the number of reports on such annulations started to grow. Herein we give an overview of some of the more relevant advances in this exciting topic.
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Affiliation(s)
- Marc Font
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS)Departamento de Química OrgánicaUniversidade de Santiago de Compostela15782Santiago de CompostelaSpain
| | - Moisés Gulías
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS)Departamento de Química OrgánicaUniversidade de Santiago de Compostela15782Santiago de CompostelaSpain
| | - José Luis Mascareñas
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS)Departamento de Química OrgánicaUniversidade de Santiago de Compostela15782Santiago de CompostelaSpain
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