1
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Xu Z, Liang X, Li H. Oxidative Radical Transnitrilation of Arylboronic Acids with Trityl Isocyanide. Org Lett 2022; 24:9403-9407. [PMID: 36519782 DOI: 10.1021/acs.orglett.2c03778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We report a radical transnitrilation of arylboronic acids with trityl isocyanide in the presence of manganese(III) acetate. Many functional groups can be tolerated in this transformation, and a special positive effect of benzoic acid in this reaction has been observed.
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Affiliation(s)
- Zhiyuan Xu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Xiaojuan Liang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Huan Li
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China
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2
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Yuan S, Liu X, Huang Z, Gui S, Diao Y, Peng YY, Ding Q. Tetrabutylammonium Chloride-Induced Cascade Radical Addition/Cyclization of O-Isocyanodiaryl Amines: A Novel Protocol for the Synthesis of 11-Trifluoromethylated Dibenzodiazepines. J Org Chem 2022; 87:16542-16549. [PMID: 36454597 DOI: 10.1021/acs.joc.2c02100] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
A straightforward protocol for the synthesis of 11-trifluoromethylated dibenzodiazepines has been developed via TBAC-induced trifluoromethylation/cyclization of o-isocyanodiaryl amines using Togni's reagent as the trifluoromethyl source. This is the first report on the one-step construction of CF3-containing dibenzodiazepine drug skeletons. Additionally, a series of 11-trifluoromethylated dibenzodiazepines were afforded in moderate to excellent yields under transition-metal-free conditions.
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Affiliation(s)
- Sitian Yuan
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022 Jiangxi, China
| | - Xuan Liu
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022 Jiangxi, China
| | - Zhongzhi Huang
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022 Jiangxi, China
| | - Shuanggen Gui
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022 Jiangxi, China
| | - Yuexing Diao
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022 Jiangxi, China
| | - Yi-Yuan Peng
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022 Jiangxi, China
| | - Qiuping Ding
- National Engineering Research Center for Carbohydrate Synthesis, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Key Laboratory for Green Chemistry of Jiangxi Province, Jiangxi Normal University, Nanchang 330022 Jiangxi, China
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3
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Yang G, Yao L, Mao G, Deng GJ, Xiao F. Synthesis of Indenoquinolinones and 2-Substituted Quinolines via [4 + 2] Cycloaddition Reaction. J Org Chem 2022; 87:14523-14535. [PMID: 36261413 DOI: 10.1021/acs.joc.2c01939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We have reported a metal-free protocol for the synthesis of indenoquinolinones and 2-substituted quinolines via [4 + 2] cycloaddition reaction using readily available 2-aminobenzaldehydes and ketones as starting materials. Different quinoline derivatives can be selectively synthesized by changing the type of ketones. O2 and dimethyl sulfoxide (DMSO) as co-oxidants play an important role in the synthesis of indenoquinolinones. This condensation/oxidation strategy involves the formation of C-N, C-C, and C-O bonds, with the advantages of high yields and a broad substrate range.
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Affiliation(s)
- Gang Yang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Lin Yao
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Guojiang Mao
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, P. R. China
| | - Guo-Jun Deng
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
| | - Fuhong Xiao
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Hunan Province Key Laboratory of Green Organic Synthesis and Application, College of Chemistry, Xiangtan University, Xiangtan 411105, China
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4
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Matsubara K, Tomomatsu K, Tajiri A, Watanabe A, Koga Y, Ishikawa R, Yamada Y. Pincer‐type Mesoionic Carbene Nickel(II) Complexes: Synthesis, Properties, Reactions, and Catalytic Application to the Suzuki–Miyaura Coupling Reaction of Aryl Bromides. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kouki Matsubara
- Fukuoka University Department of Chemistry 8-19-1 NanakumaJonan-Ku 814-0180 Fukuoka JAPAN
| | | | - Ayame Tajiri
- Fukuoka University: Fukuoka Daigaku Chemistry JAPAN
| | | | - Yuji Koga
- Fukuoka University: Fukuoka Daigaku Chemistry JAPAN
| | | | - Yuji Yamada
- Fukuoka University: Fukuoka Daigaku Chemistry JAPAN
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5
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Li C, Wang H, Liu L, Sun R, Wang X, Zhou M, Li L. Base‐Catalyzed Intramolecular Self‐Cyclization of
o
‐Alkenylaryl Isocyanides: Access to 4‐Cyano‐3‐arylquinolines. ChemistrySelect 2022. [DOI: 10.1002/slct.202103829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chao Li
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun 113001 P. R. China
| | - He Wang
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun 113001 P. R. China
| | - Lu Liu
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun 113001 P. R. China
| | - Ran Sun
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun 113001 P. R. China
| | - Xin Wang
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun 113001 P. R. China
| | - Ming‐Dong Zhou
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun 113001 P. R. China
| | - Lei Li
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun 113001 P. R. China
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6
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Liu J, Li L, Bu X, Yuan Y, Wang X, Sun R, Zhou MD, Wang H. Mn( iii)-Catalyzed cascade cyclization reaction of o-acyl aromatic isocyanides with boronic acids. Org Chem Front 2022. [DOI: 10.1039/d2qo00271j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A Mn(iii)-catalyzed cascade cyclization of o-acyl aromatic isocyanides with boronic acids was examined to give a series of 3-hydroxyindolenines in single-step. This cascade process involved a transmetalation/nucleophilic addition/intramolecular cyclization sequence.
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Affiliation(s)
- Jingya Liu
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Lei Li
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Xiubin Bu
- Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering, Shenyang Normal University, Shenyang, Liaoning, 110034, China
| | - Yu Yuan
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Xin Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Ran Sun
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Ming-Dong Zhou
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - He Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
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7
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Alabugin IV, Kuhn L, Medvedev MG, Krivoshchapov NV, Vil' VA, Yaremenko IA, Mehaffy P, Yarie M, Terent'ev AO, Zolfigol MA. Stereoelectronic power of oxygen in control of chemical reactivity: the anomeric effect is not alone. Chem Soc Rev 2021; 50:10253-10345. [PMID: 34263287 DOI: 10.1039/d1cs00386k] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Although carbon is the central element of organic chemistry, oxygen is the central element of stereoelectronic control in organic chemistry. Generally, a molecule with a C-O bond has both a strong donor (a lone pair) and a strong acceptor (e.g., a σ*C-O orbital), a combination that provides opportunities to influence chemical transformations at both ends of the electron demand spectrum. Oxygen is a stereoelectronic chameleon that adapts to the varying situations in radical, cationic, anionic, and metal-mediated transformations. Arguably, the most historically important stereoelectronic effect is the anomeric effect (AE), i.e., the axial preference of acceptor groups at the anomeric position of sugars. Although AE is generally attributed to hyperconjugative interactions of σ-acceptors with a lone pair at oxygen (negative hyperconjugation), recent literature reports suggested alternative explanations. In this context, it is timely to evaluate the fundamental connections between the AE and a broad variety of O-functional groups. Such connections illustrate the general role of hyperconjugation with oxygen lone pairs in reactivity. Lessons from the AE can be used as the conceptual framework for organizing disjointed observations into a logical body of knowledge. In contrast, neglect of hyperconjugation can be deeply misleading as it removes the stereoelectronic cornerstone on which, as we show in this review, the chemistry of organic oxygen functionalities is largely based. As negative hyperconjugation releases the "underutilized" stereoelectronic power of unshared electrons (the lone pairs) for the stabilization of a developing positive charge, the role of orbital interactions increases when the electronic demand is high and molecules distort from their equilibrium geometries. From this perspective, hyperconjugative anomeric interactions play a unique role in guiding reaction design. In this manuscript, we discuss the reactivity of organic O-functionalities, outline variations in the possible hyperconjugative patterns, and showcase the vast implications of AE for the structure and reactivity. On our journey through a variety of O-containing organic functional groups, from textbook to exotic, we will illustrate how this knowledge can predict chemical reactivity and unlock new useful synthetic transformations.
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Affiliation(s)
- Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
| | - Leah Kuhn
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.,A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova St., 119991 Moscow, Russian Federation
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.,Lomonosov Moscow State University, Leninskie Gory 1 (3), Moscow, 119991, Russian Federation
| | - Vera A Vil'
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Ivan A Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Patricia Mehaffy
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
| | - Meysam Yarie
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65167, Iran
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation
| | - Mohammad Ali Zolfigol
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamedan 65167, Iran
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8
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Liu L, Li L, Wang X, Sun R, Zhou MD, Wang H. Mn(III)-Mediated Radical Cyclization of o-Alkenyl Aromatic Isocyanides with Boronic Acids: Access to N-Unprotected 2-Aryl-3-cyanoindoles. Org Lett 2021; 23:5826-5830. [PMID: 34323503 DOI: 10.1021/acs.orglett.1c01979] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The synthesis of N-unprotected 2-aryl-3-cyanoindoles was realized via the Mn(III)-mediated radical cascade cyclization of o-alkenyl aromatic isocyanides with boronic acids. A possible mechanism involving a sequential intermolecular radical addition, intramolecular cyclization, and cleavage of the C-C bond under mild reaction conditions is proposed. Mechanism studies show that H2O or O2 might provide the oxygen source for the elimination of benzaldehyde.
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Affiliation(s)
- Lu Liu
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Lei Li
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Xin Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Ran Sun
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Ming-Dong Zhou
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - He Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
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9
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Muzalevskiy VM, Sizova ZA, Abaev VT, Nenajdenko VG. Synthesis of 2-trifluoromethylated quinolines from CF 3-alkenes. Org Biomol Chem 2021; 19:4303-4319. [PMID: 33899886 DOI: 10.1039/d1ob00098e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
α-CF3-enamines can be prepared by the reaction of pyrrolidine with the corresponding haloalkenes. The prepared enamines react with 2-nitrobenzaldehydes to give ortho-nitro-substituted α,β-diaryl-CF3-enones highly stereoselectively in up to 88% yield. Subsequent reduction of the nitro-group by an Fe-AcOH system promotes intramolecular cyclization to afford 2-CF3-3-arylquinolines in up to 99% isolated yield. High synthetic utility of all synthetic steps of the sequence was shown. A one-pot procedure was developed to give the target trifluoromethylated quinolines directly from enamines or haloalkenes.
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10
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Liao J, Yang X, Ouyang L, Lai Y, Huang J, Luo R. Recent advances in cascade radical cyclization of radical acceptors for the synthesis of carbo- and heterocycles. Org Chem Front 2021. [DOI: 10.1039/d0qo01453b] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This review is devoted to highlighting main achievements in the development of cascade radical cyclization of radical acceptors for the synthesis of carbo- and heterocycles.
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Affiliation(s)
- Jianhua Liao
- School of Pharmaceutical Sciences
- Gannan Medical University
- Ganzhou
- P. R. China
| | - Xiao Yang
- School of Pharmaceutical Sciences
- Gannan Medical University
- Ganzhou
- P. R. China
| | - Lu Ouyang
- School of Pharmaceutical Sciences
- Gannan Medical University
- Ganzhou
- P. R. China
| | - Yinlong Lai
- College of Chemistry and Environmental Engineering
- Shaoguan University
- Shaoguan 512005
- China
| | - Jiuzhong Huang
- School of Pharmaceutical Sciences
- Gannan Medical University
- Ganzhou
- P. R. China
| | - Renshi Luo
- School of Pharmaceutical Sciences
- Gannan Medical University
- Ganzhou
- P. R. China
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11
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Kos M, Žádný J, Storch J, Církva V, Cuřínová P, Sýkora J, Císařová I, Kuriakose F, Alabugin IV. Oxidative Photocyclization of Aromatic Schiff Bases in Synthesis of Phenanthridines and Other Aza-PAHs. Int J Mol Sci 2020; 21:ijms21165868. [PMID: 32824231 PMCID: PMC7461585 DOI: 10.3390/ijms21165868] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 12/30/2022] Open
Abstract
The oxidative photocyclization of aromatic Schiff bases was investigated as a potential method for synthesis of phenanthridine derivatives, biologically active compounds with medical applications. Although it is possible to prepare the desired phenanthridines using such an approach, the reaction has to be performed in the presence of acid and TEMPO to increase reaction rate and yield. The reaction kinetics was studied on a series of substituted imines covering the range from electron-withdrawing to electron-donating substituents. It was found that imines with electron-withdrawing substituents react one order of magnitude faster than imines bearing electron-donating groups. The 1H NMR monitoring of the reaction course showed that a significant part of the Z isomer in the reaction is transformed into E isomer which is more prone to photocyclization. The portion of the Z isomer transformed showed a linear correlation to the Hammett substituent constants. The reaction scope was expanded towards synthesis of larger aromatic systems, namely to the synthesis of strained aromatic systems, e.g., helicenes. In this respect, it was found that the scope of oxidative photocyclization of aromatic imines is limited to the formation of no more than five ortho-fused aromatic rings.
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Affiliation(s)
- Martin Kos
- Department of Advanced Materials and Organic Synthesis, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic; (M.K.); (J.Ž.); (J.S.)
| | - Jaroslav Žádný
- Department of Advanced Materials and Organic Synthesis, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic; (M.K.); (J.Ž.); (J.S.)
| | - Jan Storch
- Department of Advanced Materials and Organic Synthesis, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic; (M.K.); (J.Ž.); (J.S.)
| | - Vladimír Církva
- Department of Advanced Materials and Organic Synthesis, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic; (M.K.); (J.Ž.); (J.S.)
- Correspondence: (V.C.); (J.S.); (I.V.A.)
| | - Petra Cuřínová
- Department of Analytical Chemistry, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic;
| | - Jan Sýkora
- Department of Analytical Chemistry, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v. v. i., Rozvojová 135, 165 02 Prague 6, Czech Republic;
- Correspondence: (V.C.); (J.S.); (I.V.A.)
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic;
| | - Febin Kuriakose
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA;
| | - Igor. V. Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA;
- Correspondence: (V.C.); (J.S.); (I.V.A.)
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12
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Muzalevskiy VM, Belyaeva KV, Trofimov BA, Nenajdenko VG. Organometal-Free Arylation and Arylation/Trifluoroacetylation of Quinolines by Their Reaction with CF 3-ynones and Base-Induced Rearrangement. J Org Chem 2020; 85:9993-10006. [PMID: 32631065 DOI: 10.1021/acs.joc.0c01277] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of quinolines with CF3-ynones resulted in the formation of 1,3-oxazinoquinolines. Subsequent treatment of the reaction mixture with a base initiated deep structural transformation of primary products. Both steps proceed in very high yield. As a result, unusual rearrangement of 1,3-oxazinoquinolines to form either 2-arylquinolines or 2-aryl-3-trifluoroacetylquinolines was discovered. The decisive role of the base in the reaction direction was shown. Using these reactions, highly efficient pathways to 2-arylquinolines and 2-aryl-3-trifluoroacetylquinolines were elaborated to provide the corresponding compounds in high yields using a simple one-pot procedure. The possible mechanism of rearrangement is discussed.
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Affiliation(s)
- Vasiliy M Muzalevskiy
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991 Russia
| | - Kseniya V Belyaeva
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Street, Irkutsk 664033, Russia
| | - Boris A Trofimov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 Favorsky Street, Irkutsk 664033, Russia
| | - Valentine G Nenajdenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991 Russia
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13
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Zhang X, Zhu P, Zhang R, Li X, Yao T. Visible-Light-Induced Decarboxylative Cyclization of 2-Alkenylarylisocyanides with α-Oxocarboxylic Acids: Access to 2-Acylindoles. J Org Chem 2020; 85:9503-9513. [PMID: 32600039 DOI: 10.1021/acs.joc.0c00039] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient and practical protocol for visible-light-induced decarboxylative cyclization of 2-alkenylarylisocyanides with α-oxocarboxylic acids has been developed, which afforded a broad range of 2-acylindoles in moderate to good yields. The reaction proceeds through a cascade of acyl radical addition/cyclization reactions under irradiation of an Ir3+ photoredox catalyst without external oxidants and features simple operation, scalability, a broad substrate scope, and good functional group tolerance.
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Affiliation(s)
- Xiaofei Zhang
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China.,Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Peiyuan Zhu
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China
| | - Ruihong Zhang
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China
| | - Xiang Li
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China.,Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Tuanli Yao
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, China.,Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an 710021, China
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14
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Mao S, Wang H, Liu L, Wang X, Zhou M, Li L. Trifluoromethylation/Difluoromethylation‐Initiated Radical Cyclization of
o
‐Alkenyl Aromatic Isocyanides for Direct Construction of 4‐Cyano‐2‐Trifluoromethyl/Difluoromethyl‐Containing Quinolines. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000155] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shukuan Mao
- School of Chemistry and Materials ScienceLiaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
| | - He Wang
- School of Chemistry and Materials ScienceLiaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
| | - Lu Liu
- School of Chemistry and Materials ScienceLiaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
| | - Xin Wang
- School of Chemistry and Materials ScienceLiaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
| | - Ming‐Dong Zhou
- School of Chemistry and Materials ScienceLiaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
| | - Lei Li
- School of Chemistry and Materials ScienceLiaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
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15
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La-ongthong K, Naweephattana P, Khaikate O, Surawatanawong P, Soorukram D, Pohmakotr M, Reutrakul V, Leowanawat P, Kuhakarn C. Alkanethiol-Mediated Cyclization of o-Alkynylisocyanobenzenes: Synthesis of Bis-Thiolated Indole Derivatives. J Org Chem 2020; 85:6338-6351. [DOI: 10.1021/acs.joc.0c00003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kannika La-ongthong
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Phiphop Naweephattana
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Onnicha Khaikate
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Panida Surawatanawong
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Manat Pohmakotr
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Vichai Reutrakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Pawaret Leowanawat
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Chutima Kuhakarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
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16
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Liu L, Li L, Mao S, Wang X, Zhou MD, Zhao YL, Wang H. Synthesis of pyrazolo[1,5-c]quinazoline derivatives through the copper-catalyzed domino reaction of o-alkenyl aromatic isocyanides with diazo compounds. Chem Commun (Camb) 2020; 56:7665-7668. [DOI: 10.1039/d0cc00594k] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Various o-alkenyl aromatic isocyanides were prepared from readily available reactants for their double annulation with diazo compounds for a one-pot synthesis of pyrazolo[1,5-c]quinazolines under mild reaction conditions.
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Affiliation(s)
- Lu Liu
- School of Chemistry and Materials Science
- Liaoning Shihua University
- Fushun 113001
- People's Republic of China
| | - Lei Li
- School of Chemistry and Materials Science
- Liaoning Shihua University
- Fushun 113001
- People's Republic of China
| | - Shukuan Mao
- School of Chemistry and Materials Science
- Liaoning Shihua University
- Fushun 113001
- People's Republic of China
| | - Xin Wang
- School of Chemistry and Materials Science
- Liaoning Shihua University
- Fushun 113001
- People's Republic of China
| | - Ming-Dong Zhou
- School of Chemistry and Materials Science
- Liaoning Shihua University
- Fushun 113001
- People's Republic of China
| | - Yu-long Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Faculty of Chemistry
- Northeast Normal University
- Changchun 130024
- People's Republic of China
| | - He Wang
- School of Chemistry and Materials Science
- Liaoning Shihua University
- Fushun 113001
- People's Republic of China
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17
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Yogesh Kumar GR, Begum NS, Mohammed Imran K. Mn-mediated oxidative radical cyclization of 2-(azidomethyl)phenyl isocyanides with carbazate: access to quinazoline-2-carboxylates. NEW J CHEM 2020. [DOI: 10.1039/d0nj00479k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mn-TBHP mediated oxidative radical cyclization of 2-(azidomethyl)phenyl isocyanides using methyl carbazate has been described.
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Affiliation(s)
| | - Noor Shahina Begum
- Department of Studies in Chemistry
- Bangalore University
- Jnana Bharathi Campus
- Bangalore 560056
- India
| | - Khan Mohammed Imran
- Department of Studies in Chemistry
- Bangalore University
- Jnana Bharathi Campus
- Bangalore 560056
- India
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18
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Yang M, Meng XH, Wang Z, Gong Y, Zhao YL. Rhodium/copper-cocatalyzed coupling-cyclization of o-alkenyl arylisocyanides with vinyl azides: one-pot synthesis of α-carbolines. Org Chem Front 2020. [DOI: 10.1039/d0qo00994f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A novel rhodium/copper-cocatalyzed coupling–cyclization reaction of o-alkenyl arylisocyanides with vinyl azides has been developed. The reaction provides a new route to α-carbolines by the formation of two C–C bonds, one C–N bond and two aromatic rings in a single step.
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Affiliation(s)
- Ming Yang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Xiang-He Meng
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Zhuo Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Yue Gong
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
| | - Yu-Long Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Department of Chemistry
- Northeast Normal University
- Changchun 130024
- China
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19
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Liu Y, Li S, Chen X, Fan L, Li X, Zhu S, Qu L, Yu B. Mn(III)‐Mediated Regioselective 6‐
endo
‐trig Radical Cyclization of
o
‐Vinylaryl Isocyanides to Access 2‐Functionalized Quinolines. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901300] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yan Liu
- College of Chemistry Zhengzhou University Zhengzhou 450001 People's Republic of China
- College of Biological and Pharmaceutical Engineering Xinyang Agriculture & Forestry University Xinyang 464000 People's Republic of China
| | - Shi‐Jun Li
- College of Chemistry Zhengzhou University Zhengzhou 450001 People's Republic of China
| | - Xiao‐Lan Chen
- College of Chemistry Zhengzhou University Zhengzhou 450001 People's Republic of China
| | - Lu‐Lu Fan
- School of Chemistry & Chemical Engineering Henan University of Technology Zhengzhou 450001 People's Republic of China
| | - Xiao‐Yun Li
- College of Chemistry Zhengzhou University Zhengzhou 450001 People's Republic of China
| | - Shan‐Shan Zhu
- College of Chemistry Zhengzhou University Zhengzhou 450001 People's Republic of China
| | - Ling‐Bo Qu
- College of Chemistry Zhengzhou University Zhengzhou 450001 People's Republic of China
| | - Bing Yu
- College of Chemistry Zhengzhou University Zhengzhou 450001 People's Republic of China
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20
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Khaikate O, Inthalaeng N, Meesin J, Kantarod K, Pohmakotr M, Reutrakul V, Soorukram D, Leowanawat P, Kuhakarn C. Synthesis of Indolo- and Benzothieno[2,3-b]quinolines by a Cascade Cyclization of o-Alkynylisocyanobenzene Derivatives. J Org Chem 2019; 84:15131-15144. [DOI: 10.1021/acs.joc.9b02081] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Onnicha Khaikate
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Natthamon Inthalaeng
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Jatuporn Meesin
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Kritchasorn Kantarod
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Manat Pohmakotr
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Vichai Reutrakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Pawaret Leowanawat
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
| | - Chutima Kuhakarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand
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21
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Hughes AM, dos Passos Gomes G, Alabugin IV. Stereoelectronic Influence of a “Spectator” Propargylic Substituent Can Override Aromaticity Effects in Radical Peri-Cyclizations en Route to Expanded Polyaromatics. J Org Chem 2019; 84:1853-1862. [DOI: 10.1021/acs.joc.8b02779] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Audrey M. Hughes
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Gabriel dos Passos Gomes
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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22
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Sivaguru P, Wang Z, Zanoni G, Bi X. Cleavage of carbon–carbon bonds by radical reactions. Chem Soc Rev 2019; 48:2615-2656. [DOI: 10.1039/c8cs00386f] [Citation(s) in RCA: 165] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This review provides insights into the in situ generated radicals triggered carbon–carbon bond cleavage reactions.
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Affiliation(s)
- Paramasivam Sivaguru
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Northeast Normal University
- Changchun 130024
- China
| | - Zikun Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Northeast Normal University
- Changchun 130024
- China
| | | | - Xihe Bi
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis
- Northeast Normal University
- Changchun 130024
- China
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23
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dos Passos Gomes G, Morrison AE, Dudley GB, Alabugin IV. Optimizing Amine‐Mediated Alkyne–Allene Isomerization to Improve Benzannulation Cascades: Synergy between Theory and Experiments. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801052] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
| | - Alec E. Morrison
- Department of Chemistry and Biochemistry Florida State University 32306 Tallahassee FL USA
| | - Gregory B. Dudley
- C. Eugene Bennett Department of Chemistry West Virginia University 26505 Morgantown WV USA
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry Florida State University 32306 Tallahassee FL USA
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24
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Gomes GDP, Loginova Y, Vatsadze SZ, Alabugin IV. Isonitriles as Stereoelectronic Chameleons: The Donor-Acceptor Dichotomy in Radical Additions. J Am Chem Soc 2018; 140:14272-14288. [PMID: 30270623 DOI: 10.1021/jacs.8b08513] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Radical addition to isonitriles (isocyanides) starts and continues all the way to the transition state (TS) mostly as a simple addition to a polarized π-bond. Only after the TS has been passed, the spin density moves to the α-carbon to form the imidoyl radical, the hallmark intermediate of the 1,1-addition-mediated cascades. Addition of alkyl, aryl, heteroatom-substituted, and heteroatom-centered radicals reveals a number of electronic, supramolecular, and conformational effects potentially useful for the practical control of isonitrile-mediated radical cascade transformations. Addition of alkyl radicals reveals two stereoelectronic preferences. First, the radical attack aligns the incipient C···C bond with the aromatic π-system. Second, one of the C-H/C-C bonds at the radical carbon eclipses the isonitrile N-C bond. Combination of these stereoelectronic preferences with entropic penalty explains why the least exergonic reaction (addition of the t-Bu radical) is also the fastest. Heteroatomic radicals reveal further unusual trends. In particular, the Sn radical addition to the PhNC is much faster than addition of the other group IV radicals, despite forming the weakest bond. This combination of kinetic and thermodynamic properties is ideal for applications in control of radical reactivity via dynamic covalent chemistry and may be responsible for the historically broad utility of Sn radicals ("the tyranny of tin"). In addition to polarity and low steric hindrance, radical attack at the relatively strong π-bond of isonitriles is assisted by "chameleonic" supramolecular interactions of the radical center with both the isonitrile π*-system and lone pair. These interactions are yet another manifestation of supramolecular control of radical chemistry.
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Affiliation(s)
- Gabriel Dos Passos Gomes
- Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32309 , United States
| | - Yulia Loginova
- Department of Organic Chemistry, Faculty of Chemistry , Lomonosov Moscow State University , 1-3 Leninskiye Gory , Moscow 119991 , Russia
| | - Sergey Z Vatsadze
- Department of Organic Chemistry, Faculty of Chemistry , Lomonosov Moscow State University , 1-3 Leninskiye Gory , Moscow 119991 , Russia
| | - Igor V Alabugin
- Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32309 , United States
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25
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Charoenpol A, Meesin J, Khaikate O, Reutrakul V, Pohmakotr M, Leowanawat P, Soorukram D, Kuhakarn C. Synthesis of 3-substituted quinolin-2(1H)-ones via the cyclization of o-alkynylisocyanobenzenes. Org Biomol Chem 2018; 16:7050-7054. [PMID: 30239546 DOI: 10.1039/c8ob01882k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A facile synthesis of various functionalized 3-substituted quinolin-2(1H)-ones through Ag(i) nitrate-catalyzed cyclization of o-alkynylisocyanobenzenes is described. The reaction allows rapid and convenient access to 3-substituted quinolin-2(1H)-one scaffolds in moderate to good yields.
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Affiliation(s)
- Ailada Charoenpol
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400, Thailand.
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26
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Orwat B, Oh MJO, Kubicki M, Kownacki I. Synthesis of 5-Substituted Benzo[h
]quinoline Derivatives via
Reactions Involving C(sp
2
)−Br Bond Activation. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800286] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Bartosz Orwat
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; St. Umultowska 89b 61-614 Poznań Poland
- Center for Advanced Technology; Adam Mickiewicz University in Poznań; Umultowska 89c 61-614 Poznań Poland
| | - Myong-joon Oh Oh
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; St. Umultowska 89b 61-614 Poznań Poland
- Center for Advanced Technology; Adam Mickiewicz University in Poznań; Umultowska 89c 61-614 Poznań Poland
| | - Maciej Kubicki
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; St. Umultowska 89b 61-614 Poznań Poland
| | - Ireneusz Kownacki
- Faculty of Chemistry; Adam Mickiewicz University in Poznań; St. Umultowska 89b 61-614 Poznań Poland
- Center for Advanced Technology; Adam Mickiewicz University in Poznań; Umultowska 89c 61-614 Poznań Poland
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27
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Han F, Yang W, Zhao A, Zheng R, Ji C, Liu X, Liu G, Chen C. Highly Efficient Construction of 2-Fluoroalkyl Quinolines through a Palladium-Catalyzed 6-endo
-trig Heck Cyclization Reaction. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800187] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Fangwai Han
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry; Ministry of Education; College of Chemistry; Tianjin Normal University; No. 393, Extension of Bin Shui West Road Tianjin 300387 P. R. China
| | - Wenqing Yang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry; Ministry of Education; College of Chemistry; Tianjin Normal University; No. 393, Extension of Bin Shui West Road Tianjin 300387 P. R. China
| | - Aichun Zhao
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry; Ministry of Education; College of Chemistry; Tianjin Normal University; No. 393, Extension of Bin Shui West Road Tianjin 300387 P. R. China
| | - Ruihong Zheng
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry; Ministry of Education; College of Chemistry; Tianjin Normal University; No. 393, Extension of Bin Shui West Road Tianjin 300387 P. R. China
| | - Chenhui Ji
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry; Ministry of Education; College of Chemistry; Tianjin Normal University; No. 393, Extension of Bin Shui West Road Tianjin 300387 P. R. China
| | - Xinqi Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry; Ministry of Education; College of Chemistry; Tianjin Normal University; No. 393, Extension of Bin Shui West Road Tianjin 300387 P. R. China
| | - Guiyan Liu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry; Ministry of Education; College of Chemistry; Tianjin Normal University; No. 393, Extension of Bin Shui West Road Tianjin 300387 P. R. China
| | - Chen Chen
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid Functional Materials Chemistry; Ministry of Education; College of Chemistry; Tianjin Normal University; No. 393, Extension of Bin Shui West Road Tianjin 300387 P. R. China
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28
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Heckman LM, He Z, Jamison TF. Synthesis of Highly Substituted 2-Arylindoles via Copper-Catalyzed Coupling of Isocyanides and Arylboronic Acids. Org Lett 2018; 20:3263-3267. [DOI: 10.1021/acs.orglett.8b01132] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Laurel M. Heckman
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Zhi He
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Timothy F. Jamison
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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29
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Alabugin IV, Gonzalez-Rodriguez E. Alkyne Origami: Folding Oligoalkynes into Polyaromatics. Acc Chem Res 2018; 51:1206-1219. [PMID: 29676896 DOI: 10.1021/acs.accounts.8b00026] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Do not bend the triple bonds! This familiar undergraduate mantra must be disobeyed if the alkyne group is used as a building block in molecular construction. This Account will describe our exploits in "alkyne origami", that is, folding oligoalkynes into new shapes via cyclization cascades. This research stems from a set of guidelines for the cyclizations of alkynes that we suggested in 2011 ( Gilmore Chem. Rev. 2011 , 111 , 6513 ; Alabugin J. Am. Chem. Soc. 2011 , 133 , 12608 ). The guidelines blended critical analysis of ∼40 years of experimental research with computations into the comprehensive predictions of the relative favorability of dig-cyclizations of anions and radicals. In this Account, we will show how this new understanding has been instrumental in building polyaromatics. In particular, we illustrate the utility of these stereoelectronic models by developing a toolbox of practical, selective, and efficient synthetic transformations. The high energy and high carbon content render alkynes the perfect precursors for the preparation of polyaromatic ribbons and other carbon-rich materials with precisely controlled structure and reactivity. Still, the paradox of alkyne reactivity (alkynes store a lot of energy but are protected kinetically by their relatively strong π-bonds) requires precise use of stereoelectronic factors for lowering the activation barriers for alkyne cyclizations. These factors are drastically different in the "all-exo" and the "all-endo" cyclization cascades of oligoynes. This Account will highlight the interplay between the stereoelectronics of bond formation and topology of acyclic precursor "folding" into a polycyclic ribbon. The topology of folding is simpler for the endo cascades, which are compatible with initiation either at the edge or at the center. In contrast, the exo cascades require precise folding of an oligoalkyne ribbon by starting the cascade exactly at the center of the chain. These differences define the key challenges in the design of these two types of alkyne cyclization cascades. For the endo processes, the folding is simple, but these processes require a strategy ("LUMO Umpolung") for inverting the usual stereoelectronic requirements of alkyne cyclizations. We also show how alkenes can be used as alkyne equivalents in cyclizations coupled with fragmentations and how one can make endo cyclization products without ever going through an endo cyclization. In contrast, each elementary step of the exo cascades benefits from the inherent exo preference for the radical attack, but these cascades require precise initiation by starting exactly at the central alkyne unit of the oligoyne. This strict selectivity requirement led to the development of traceless directing groups capable of supramolecular assistance to the initiation step and self-terminating departure at the end of the cascade. With attention to electronic effects that can stop radical cascades, oligoalkynes can be selectively converted into precisely shaped and functionalized polyaromatic products. The generality of these concepts is further illustrated by the development of radical "peri annulations" at the zigzag edge of acenes.
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Affiliation(s)
- Igor V. Alabugin
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Edgar Gonzalez-Rodriguez
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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30
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Du Y, Liu Y, Wan JP. Copper-Catalyzed One-Pot N-Acylation and C5–H Halogenation of 8-Aminoquinolines: The Dual Role of Acyl Halides. J Org Chem 2018; 83:3403-3408. [DOI: 10.1021/acs.joc.8b00068] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yi Du
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
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31
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Khaikate O, Meesin J, Pohmakotr M, Reutrakul V, Leowanawat P, Soorukram D, Kuhakarn C. Sulfinates and thiocyanates triggered 6-endocyclization ofo-alkynylisocyanobenzenes. Org Biomol Chem 2018; 16:8553-8558. [DOI: 10.1039/c8ob02338g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient synthesis of 2-sulfonyl- and 2-thiocyanato-3-substituted quinolines through sequential nucleophilic addition/cyclization ofo-alkynylisocyanobenzenes is described.
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Affiliation(s)
- Onnicha Khaikate
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | - Jatuporn Meesin
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | - Manat Pohmakotr
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | - Vichai Reutrakul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | - Pawaret Leowanawat
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | - Darunee Soorukram
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | - Chutima Kuhakarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC)
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
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32
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Plesniak MP, Huang HM, Procter DJ. Radical cascade reactions triggered by single electron transfer. Nat Rev Chem 2017. [DOI: 10.1038/s41570-017-0077] [Citation(s) in RCA: 169] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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33
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Yuan YQ, Kumar PS, Zhang CN, Yang MH, Guo SR. Aerobic thiyl radical addition/cyclization of N-methacryloyl benzamides for the synthesis of isoquinoline-1,3(2H,4H)-dione derivatives. Org Biomol Chem 2017; 15:7330-7338. [DOI: 10.1039/c7ob01552f] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly effective dioxygen-triggered oxidative thiyl radical addition/cyclization of N-methacryloylbenzamides was explored. This method provides convenient access to a variety of useful sulfide-containing 4,4-disubstituted isoquinoline-1,3-diones.
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Affiliation(s)
- Yan-qin Yuan
- Department of Chemistry
- Lishui University
- Lishui
- China
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34
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Gomes GDP, Evoniuk CJ, Ly M, Alabugin IV. Changing the path of least resistance, or access to endo-dig products via a sequence of three exo-trig transition states: electronic effects in homoallyic ring expansion cascades of alkenyl isonitriles. Org Biomol Chem 2017; 15:4135-4143. [DOI: 10.1039/c7ob00527j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Substituent effects reshape the potential energy surfaces for radical homoallylic expansion/fragmentation cascades that transform alkenyl isonitriles into N-heteroaromatics
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Affiliation(s)
| | | | - Michelle Ly
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee
- USA
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry
- Florida State University
- Tallahassee
- USA
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