1
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Lu B, Xu M, Qi X, Jiang M, Xiao WJ, Chen JR. Switchable Radical Carbonylation by Philicity Regulation. J Am Chem Soc 2022; 144:14923-14935. [PMID: 35939790 DOI: 10.1021/jacs.2c06677] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Carbonylation reactions involving CO as readily available C1 synthons have become one of the most important tools for the construction of carbonyl compounds from feedstock chemicals. Despite numerous catalytic methods for carbonylation reactions proceeding via ionic or radical pathways, an inherent limitation to these methods is the need to control switchable single and double carbonylative formation of value-added products from the same and simple starting materials. Here, we describe a new strategy that exploits photoredox catalysis to regulate the philicity of amine coupling partners to drive switchable radical carbonylation reactions. In double carbonylation, amines were first transformed into nitrogen radical cations by single-electron transfer-oxidation and coupled with CO to form carbamoyl radicals, which further underwent radical cross-coupling with the incipient cyanoalkyl acyl radicals to afford the double carbonylation products. Upon the addition of stoichiometric 4-dimethylaminopyridine (DMAP), DMAP competitively traps the initially formed cyanoalkyl acyl radical to form the relatively stabilized cyanoalkyl acyl-DMAP salts that engaged in the subsequent substitution with the nucleophilic amines to produce the single carbonylation products. The reaction proceeded smoothly with excellent selectivity in the presence of various amine nucleophiles at room temperature, generating valuable amides and α-ketoamides in a versatile and controlled fashion. Combined experimental and computational studies provided mechanistic insights into the possible pathways.
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Affiliation(s)
- Bin Lu
- Key Laboratory of Pesticides & Chemical Biology Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Minghao Xu
- Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Xiaotian Qi
- Materials, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Min Jiang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, P. R. China
| | - Wen-Jing Xiao
- Key Laboratory of Pesticides & Chemical Biology Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jia-Rong Chen
- Key Laboratory of Pesticides & Chemical Biology Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, P. R. China
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2
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Ge Y, Ye F, Yang J, Spannenberg A, Jiao H, Jackstell R, Beller M. Palladium-Catalyzed Cascade Carbonylation to α,β-Unsaturated Piperidones via Selective Cleavage of Carbon-Carbon Triple Bonds. Angew Chem Int Ed Engl 2021; 60:22393-22400. [PMID: 34382728 PMCID: PMC8519052 DOI: 10.1002/anie.202108120] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/29/2021] [Indexed: 12/23/2022]
Abstract
A direct and selective synthesis of α,β-unsaturated piperidones by a new palladium-catalyzed cascade carbonylation is described. In the presented protocol, easily available propargylic alcohols react with aliphatic amines to provide a broad variety of interesting heterocycles. Key to the success of this transformation is a remarkable catalytic cleavage of the present carbon-carbon triple bond by using a specific catalyst with 2-diphenylphosphinopyridine as ligand and appropriate reaction conditions. Mechanistic studies and control experiments revealed branched unsaturated acid 11 as crucial intermediate.
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Affiliation(s)
- Yao Ge
- Leibniz-Institut für Katalyse e. V.Albert-Einstein-Straße 29a18059RostockGermany
| | - Fei Ye
- Leibniz-Institut für Katalyse e. V.Albert-Einstein-Straße 29a18059RostockGermany
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of EducationKey Laboratory of Organosilicon Material Technology of Zhejiang ProvinceHangzhou Normal UniversityNo. 2318, Yuhangtang Road311121HangzhouP. R. China
| | - Ji Yang
- Leibniz-Institut für Katalyse e. V.Albert-Einstein-Straße 29a18059RostockGermany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e. V.Albert-Einstein-Straße 29a18059RostockGermany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e. V.Albert-Einstein-Straße 29a18059RostockGermany
| | - Ralf Jackstell
- Leibniz-Institut für Katalyse e. V.Albert-Einstein-Straße 29a18059RostockGermany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e. V.Albert-Einstein-Straße 29a18059RostockGermany
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3
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Ge Y, Ye F, Yang J, Spannenberg A, Jiao H, Jackstell R, Beller M. Palladium‐Catalyzed Cascade Carbonylation to α,β‐Unsaturated Piperidones via Selective Cleavage of Carbon–Carbon Triple Bonds. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108120] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yao Ge
- Leibniz-Institut für Katalyse e. V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Fei Ye
- Leibniz-Institut für Katalyse e. V. Albert-Einstein-Straße 29a 18059 Rostock Germany
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education Key Laboratory of Organosilicon Material Technology of Zhejiang Province Hangzhou Normal University No. 2318, Yuhangtang Road 311121 Hangzhou P. R. China
| | - Ji Yang
- Leibniz-Institut für Katalyse e. V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e. V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse e. V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Ralf Jackstell
- Leibniz-Institut für Katalyse e. V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e. V. Albert-Einstein-Straße 29a 18059 Rostock Germany
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4
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Zhang S, Neumann H, Beller M. Synthesis of α,β-unsaturated carbonyl compounds by carbonylation reactions. Chem Soc Rev 2020; 49:3187-3210. [DOI: 10.1039/c9cs00615j] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Carbonylation reactions represent one of the most important tool box for the synthesis of α,β-unsaturated carbonyl compounds which are key building blocks in organic chemistry. This paper summarizes the most important advances in this field.
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Affiliation(s)
- Shaoke Zhang
- Leibniz-Institut für Katalyse e.V
- 18059 Rostock
- Germany
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5
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Fukuyama T, Okada T, Nakashima N, Ryu I. Radical Mediated Aza‐
Pauson‐Khand
Reaction of Acetylenes, Imines, and CO Leading to Five‐Membered Unsaturated Lactams. Helv Chim Acta 2019. [DOI: 10.1002/hlca.201900186] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takahide Fukuyama
- Department of Chemistry, Graduate School of ScienceOsaka Prefecture University, Sakai Osaka 599-8531 Japan
| | - Takuma Okada
- Department of Chemistry, Graduate School of ScienceOsaka Prefecture University, Sakai Osaka 599-8531 Japan
| | - Nao Nakashima
- Department of Chemistry, Graduate School of ScienceOsaka Prefecture University, Sakai Osaka 599-8531 Japan
| | - Ilhyong Ryu
- Department of Chemistry, Graduate School of ScienceOsaka Prefecture University, Sakai Osaka 599-8531 Japan
- Department of Applied ChemistryNational Chiao Tung University Hsinchu 30010 Taiwan
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6
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Monier M, Abdel‐Latif D, El‐Mekabaty A, Elattar KM. Reactivity and stereoselectivity of oxazolopyridines with a ring‐junction nitrogen atom. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3727] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mohamed Monier
- Chemistry Department, Faculty of ScienceTaibah University Yanbu Al‐Bahr Kingdom of Saudi Arabia
- Chemistry Department, Faculty of ScienceMansoura University Mansoura Egypt
| | - Doaa Abdel‐Latif
- Chemistry Department, Faculty of ScienceTaibah University Yanbu Al‐Bahr Kingdom of Saudi Arabia
- Chemistry Department, Faculty of ScienceMansoura University Mansoura Egypt
| | - Ahmed El‐Mekabaty
- Chemistry Department, Faculty of ScienceMansoura University Mansoura Egypt
| | - Khaled M. Elattar
- Chemistry Department, Faculty of ScienceMansoura University Mansoura Egypt
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7
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Monier M, El-Mekabaty A, Abdel-Latif D, Elattar KM. Chemistry of bicyclic 5-6 systems: Synthesis of oxazolo[3,2-a]pyridines and their salts with a ring-junction nitrogen atom. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1643889] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Mohamed Monier
- Chemistry Department, Faculty of Science, Taibah University, Yanbu Al-Bahr, Kingdom of Saudi Arabia
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Ahmed El-Mekabaty
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Doaa Abdel-Latif
- Chemistry Department, Faculty of Science, Taibah University, Yanbu Al-Bahr, Kingdom of Saudi Arabia
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Khaled M. Elattar
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
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8
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9
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Matsubara H, Kawamoto T, Fukuyama T, Ryu I. Applications of Radical Carbonylation and Amine Addition Chemistry: 1,4-Hydrogen Transfer of 1-Hydroxylallyl Radicals. Acc Chem Res 2018; 51:2023-2035. [PMID: 30137961 DOI: 10.1021/acs.accounts.8b00278] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
1,4-Hydrogen transfer from the 1-hydroxyallyl radical to give the enoxyl (α-keto) radical is an exothermic process with a high activation energy based on DFT calculations. The lack of experimental examples of such 1,4-H shift reactions lies in the difficulty of generating the 1-hydroxyallyl radical. We have shown that radical carbonylation of alkenyl radicals with CO followed by nucleophilic trapping of the carbonyl portion of the resulting radical by amines gives rise to 1-amino-substituted 1-hydroxyallyl radicals in situ. At the outset of this chemistry, we examined intramolecular trapping reactions via radical carbonylation of alkynylamines mediated by tributyltin hydride. Consequently, α-methylene lactams were obtained, for which the initially formed 1-amino-substituted 1-hydroxyallyl radical underwent a 1,4-H shift followed by subsequent β-scission, which led to the expulsion of a tributyltin radical. A competing pathway of the 1,4-H shift of 1-amino-substituted 1-hydroxyallyl radicals involving hydrogen abstraction was observed, which led to the formation of α-stannylmethylene lactams as a major byproduct. However, in contrast, when intermolecular trapping of α-ketenyl radicals by amines was carried out, the 1,4-H shift from the 1-amino-substituted 1-hydroxyallyl radical became the major pathway, which gave good yields of α,β-unsaturated amides. Thus, we were able to develop three-component reactions comprising terminal alkynes, CO, and amines that led to α,β-unsaturated amides via the 1,4-H shift reaction. DFT calculations support the observation that the 1,4-H shift is more facile when 1-hydroxyallyl radicals have both 1-amino and 3-tin substituents. The choice of substituents on the amine nitrogen is also important, since N-C bond cleavage via an SH2-type reaction can become a competing pathway. Such an unusual SH2-type reaction at the amine nitrogen is favored when the leaving alkyl radicals are stable, such as PhC(•)H(CH3) and t-Bu•. Interestingly, even nucleophilic attack of tertiary amines onto α-ketenyl radicals causes cleavage of the C-N bond. For this reaction, DFT calculations predict an indirect homolytic substitution mechanism involving expulsion of alkyl radicals through the zwitterionic radical intermediate arising from nucleophilic amine addition onto the α-ketenyl radical. In contrast, the carbonylation of aryl radicals, generated from aryl iodides, in the presence of amines gave aromatic carboxylic amides in good yields. It is proposed that radical anions originating from acyl radicals and amines undergo electron transfer to aryl iodides to give aminocarbonylation products.
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Affiliation(s)
- Hiroshi Matsubara
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takuji Kawamoto
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takahide Fukuyama
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Ilhyong Ryu
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 300, ROC
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10
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Matsubara H, Kawamoto T, Fukuyama T, Ryu I. Theoretical Calculations for the 1,4-Hydrogen Shift of 1-Hydroxyallyl Radicals Leading to α-Keto Radicals; Prediction of Facilitation by 1-Amino and 3-Tin Substituents. CHEM LETT 2018. [DOI: 10.1246/cl.180522] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hiroshi Matsubara
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takuji Kawamoto
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takahide Fukuyama
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Ilhyong Ryu
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
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11
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Guo WS, Wang YC, Dou Q, Wen LR, Li M. A copper-catalyzed arylation/nucleophilic addition/fragmentation/C–S bond formation cascade: synthesis of bis(arylthio)imines. Org Chem Front 2017. [DOI: 10.1039/c6qo00739b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new arylation/nucleophilic addition/fragmentation/C–S bond formation cascade was developed using isothiocyanates and diaryliodonium salts.
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Affiliation(s)
- Wei-Si Guo
- State Key Laboratory Base of Eco-Chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science & Technology
- Qingdao
- China
| | - Yuan-Chao Wang
- State Key Laboratory Base of Eco-Chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science & Technology
- Qingdao
- China
| | - Qian Dou
- State Key Laboratory Base of Eco-Chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science & Technology
- Qingdao
- China
| | - Li-Rong Wen
- State Key Laboratory Base of Eco-Chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science & Technology
- Qingdao
- China
| | - Ming Li
- State Key Laboratory Base of Eco-Chemical Engineering
- College of Chemistry and Molecular Engineering
- Qingdao University of Science & Technology
- Qingdao
- China
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12
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Laha JK, Patel KV, Dubey G, Jethava KP. Intramolecular Minisci acylation under silver-free neutral conditions for the synthesis of azafluorenones and fluorenones. Org Biomol Chem 2017; 15:2199-2210. [DOI: 10.1039/c7ob00077d] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
An intramolecular Minisci acylation under silver-free neutral conditions providing access to azafluorenones and fluorenones has been developed.
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Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
| | - Ketul V. Patel
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
| | - Gurudutt Dubey
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
| | - Krupal P. Jethava
- Department of Pharmaceutical Technology (Process Chemistry)
- National Institute of Pharmaceutical Education and Research
- Punjab 160062
- India
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13
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Tang E, Zhao Y, Li W, Wang W, Zhang M, Dai X. Catalytic Selenium-Promoted Intermolecular Friedel–Crafts Alkylation with Simple Alkenes. Org Lett 2016; 18:912-5. [DOI: 10.1021/acs.orglett.5b03579] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- E Tang
- Key Laboratory of Medicinal Chemistry for Natural Resources (Yunnan
University) Ministry of Education and ‡School of Chemical Science and
Technology, Yunnan University, 2 Green Lake North Road, Kunming 650091, China
| | - Yinjiao Zhao
- Key Laboratory of Medicinal Chemistry for Natural Resources (Yunnan
University) Ministry of Education and ‡School of Chemical Science and
Technology, Yunnan University, 2 Green Lake North Road, Kunming 650091, China
| | - Wen Li
- Key Laboratory of Medicinal Chemistry for Natural Resources (Yunnan
University) Ministry of Education and ‡School of Chemical Science and
Technology, Yunnan University, 2 Green Lake North Road, Kunming 650091, China
| | - Weilin Wang
- Key Laboratory of Medicinal Chemistry for Natural Resources (Yunnan
University) Ministry of Education and ‡School of Chemical Science and
Technology, Yunnan University, 2 Green Lake North Road, Kunming 650091, China
| | - Meng Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resources (Yunnan
University) Ministry of Education and ‡School of Chemical Science and
Technology, Yunnan University, 2 Green Lake North Road, Kunming 650091, China
| | - Xin Dai
- Key Laboratory of Medicinal Chemistry for Natural Resources (Yunnan
University) Ministry of Education and ‡School of Chemical Science and
Technology, Yunnan University, 2 Green Lake North Road, Kunming 650091, China
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14
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Affiliation(s)
- Ilhyong Ryu
- Graduate School of Sciences, Osaka Prefecture University
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15
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Xu Y, Huang D, Wang KH, Ma J, Su Y, Fu Y, Hu Y. Tin Powder-Promoted One-Pot Construction of α-Methylene-γ-lactams and Spirolactams from Aldehydes or Ketones, Acylhydrazines, and 2-(Bromomethyl)acrylate. J Org Chem 2015; 80:12224-33. [DOI: 10.1021/acs.joc.5b02154] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yanli Xu
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967
Anning East Road, Lanzhou 730070, P. R. China
| | - Danfeng Huang
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967
Anning East Road, Lanzhou 730070, P. R. China
| | - Ke-Hu Wang
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967
Anning East Road, Lanzhou 730070, P. R. China
| | - Junyan Ma
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967
Anning East Road, Lanzhou 730070, P. R. China
| | - Yingpeng Su
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967
Anning East Road, Lanzhou 730070, P. R. China
| | - Ying Fu
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967
Anning East Road, Lanzhou 730070, P. R. China
| | - Yulai Hu
- College
of Chemistry and Chemical Engineering, Northwest Normal University, 967
Anning East Road, Lanzhou 730070, P. R. China
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
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16
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Liu D, Liu C, Lei A. Carbon-Centered Radical Addition to C=X Bonds for C−X Bond Formation. Chem Asian J 2015; 10:2040-54. [DOI: 10.1002/asia.201500326] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Dong Liu
- College of Chemistry and Molecular Sciences; the Institute for Advanced Studies (IAS); Wuhan University; Wuhan, Hubei 430072 P.R. China
| | - Chao Liu
- College of Chemistry and Molecular Sciences; the Institute for Advanced Studies (IAS); Wuhan University; Wuhan, Hubei 430072 P.R. China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences; the Institute for Advanced Studies (IAS); Wuhan University; Wuhan, Hubei 430072 P.R. China
- National Research Center for Carbohydrate Synthesis; Jiangxi Normal University; Nanchang, Jiangxi 330022 P.R. China
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17
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Kawamoto T, Matsubara H, Ryu I. A Theoretical Study on Reduction of Acyl Radicals with Borohydride Anions. CHEM LETT 2014. [DOI: 10.1246/cl.140370] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Takuji Kawamoto
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University
| | - Hiroshi Matsubara
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University
| | - Ilhyong Ryu
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University
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18
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Basavaiah D, Reddy GC, Bharadwaj KC. The Acrylamide Moiety as an Activated Alkene Component in the Intramolecular Baylis-Hillman Reaction: Facile Synthesis of Functionalized α-Methylene Lactam and Spirolactam Frameworks. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301526] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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19
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20
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21
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Abstract
This review article focuses on state-of-the-art borohydride based radical reactions, also covering earlier work, kinetics and some DFT calculations with respect to the hydrogen transfer mechanism.
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Affiliation(s)
- Takuji Kawamoto
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai, Japan
| | - Ilhyong Ryu
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai, Japan
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22
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Ueda M, Uenoyama Y, Terasoma N, Doi S, Kobayashi S, Ryu I, Murphy JA. A construction of 4,4-spirocyclic γ-lactams by tandem radical cyclization with carbon monoxide. Beilstein J Org Chem 2013; 9:1340-5. [PMID: 23946829 PMCID: PMC3740707 DOI: 10.3762/bjoc.9.151] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Accepted: 06/17/2013] [Indexed: 11/23/2022] Open
Abstract
A straightforward synthesis of 4,4-spirocyclic indol γ-lactams by tandem radical cyclization of iodoaryl allyl azides with CO was achieved. The reaction of iodoaryl allyl azides, TTMSS and AIBN under CO pressure (80 atm) in THF at 80 °C gave the desired 4,4-spirocyclic indoline, benzofuran, and oxindole γ-lactams in moderate to good yields.
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Affiliation(s)
- Mitsuhiro Ueda
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
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23
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Liu Y, Barry BD, Yu H, Liu J, Liao P, Bi X. Regiospecific 6-Endo-Annulation of in Situ Generated 3,4-Dienamides/Acids: Synthesis of δ-Lactams and δ-Lactones. Org Lett 2013; 15:2608-11. [DOI: 10.1021/ol4007772] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ying Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. of China, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. of China, and School of Chemistry and Life Science, Anshan Normal University, Anshan, Liaoning 114007, P. R. of China
| | - Badru-Deen Barry
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. of China, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. of China, and School of Chemistry and Life Science, Anshan Normal University, Anshan, Liaoning 114007, P. R. of China
| | - Haifeng Yu
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. of China, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. of China, and School of Chemistry and Life Science, Anshan Normal University, Anshan, Liaoning 114007, P. R. of China
| | - Jianquan Liu
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. of China, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. of China, and School of Chemistry and Life Science, Anshan Normal University, Anshan, Liaoning 114007, P. R. of China
| | - Peiqiu Liao
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. of China, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. of China, and School of Chemistry and Life Science, Anshan Normal University, Anshan, Liaoning 114007, P. R. of China
| | - Xihe Bi
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. of China, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. of China, and School of Chemistry and Life Science, Anshan Normal University, Anshan, Liaoning 114007, P. R. of China
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24
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Jiang H, Yan L, Xu M, Lu W, Cai Y, Wan W, Yao J, Wu S, Zhu S, Hao J. Nucleophile-Dependent Regioselective Reaction of (S)-4-Benzyl-2-Fluoroalkyl-1,3-Oxazolines. J Org Chem 2013; 78:4261-9. [DOI: 10.1021/jo400073d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Haizhen Jiang
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s
Republic of China
- Key Laboratory
of Organofluorine
Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of
China
| | - Liuming Yan
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s
Republic of China
| | - Minjun Xu
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s
Republic of China
| | - Wenjun Lu
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s
Republic of China
| | - Yeshan Cai
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s
Republic of China
| | - Wen Wan
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s
Republic of China
| | - Jianhua Yao
- Key Laboratory
of Organofluorine
Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of
China
| | - Shaoxiong Wu
- Emory NMR Research Center, Emory University, 201 Dowman Drive, Atlanta, Georgia, 30322,
United States
| | - Shizheng Zhu
- Key Laboratory
of Organofluorine
Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of
China
| | - Jian Hao
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, People’s
Republic of China
- Key Laboratory
of Organofluorine
Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People’s Republic of
China
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25
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Fukuyama T, Nakashima N, Okada T, Ryu I. Free-Radical-Mediated [2 + 2 + 1] Cycloaddition of Acetylenes, Amidines, and CO Leading to Five-Membered α,β-Unsaturated Lactams. J Am Chem Soc 2013; 135:1006-8. [DOI: 10.1021/ja312654q] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takahide Fukuyama
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531,
Japan
| | - Nao Nakashima
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531,
Japan
| | - Takuma Okada
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531,
Japan
| | - Ilhyong Ryu
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531,
Japan
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26
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Wille U. Radical Cascades Initiated by Intermolecular Radical Addition to Alkynes and Related Triple Bond Systems. Chem Rev 2012; 113:813-53. [DOI: 10.1021/cr100359d] [Citation(s) in RCA: 465] [Impact Index Per Article: 38.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Uta Wille
- School of Chemistry and
BIO21 Molecular Science and
Biotechnology Institute, Australian Research Council Centre of Excellence
for Free Radical Chemistry and Biotechnology, The University of Melbourne, 30 Flemington Road, Parkville, Victoria
3010, Australia
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27
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de Salas C, Blank O, Heinrich MR. Radical carbonitrosation and recycling of the waste gas nitrogen monoxide. Chemistry 2011; 17:9306-10. [PMID: 21766369 DOI: 10.1002/chem.201101565] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Indexed: 11/10/2022]
Affiliation(s)
- Cristina de Salas
- Department für Chemie und Pharmazie, Pharmazeutische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstrasse 19, 91052 Erlangen, Germany
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28
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Albrecht A, Albrecht Ł, Janecki T. Recent Advances in the Synthesis of α‐Alkylidene‐Substituted δ‐Lactones, γ‐Lactams and δ‐Lactams. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001486] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anna Albrecht
- Institute of Organic Chemistry, Technical University of Łódź, Żeromskiego 116, 90‐924 Łódź, Poland, Fax: +48‐426365530
| | - Łukasz Albrecht
- Institute of Organic Chemistry, Technical University of Łódź, Żeromskiego 116, 90‐924 Łódź, Poland, Fax: +48‐426365530
| | - Tomasz Janecki
- Institute of Organic Chemistry, Technical University of Łódź, Żeromskiego 116, 90‐924 Łódź, Poland, Fax: +48‐426365530
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29
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Ryu I, Fukuyama T, Tojino M, Uenoyama Y, Yonamine Y, Terasoma N, Matsubara H. Radical carbonylation of ω-alkynylamines leading to α-methylene lactams. Synthetic scope and the mechanistic insights. Org Biomol Chem 2011; 9:3780-6. [DOI: 10.1039/c1ob05145h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Kyne SH, Schiesser CH, Matsubara H. An ab initio and DFT study of radical addition reactions of imidoyl and thioyl radicals to methanimine. Org Biomol Chem 2011; 9:3217-24. [DOI: 10.1039/c1ob05105a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Lamas MC, Vaillard SE, Wibbeling B, Studer A. Radical Amination with Trimethylstannylated Benzophenone Imine. Org Lett 2010; 12:2072-5. [DOI: 10.1021/ol1005455] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marie-Céline Lamas
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Santiago E. Vaillard
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Birgit Wibbeling
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
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32
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Ryu IH, Fukuyama T, Nobuta O, Uenoyama Y. Stannylcarbonylation of Hydroxy-substituted Alkynes. Intramoleuclar Trapping of α-Ketenyl Radicals by a Hydroxy Group Leading to Lactols. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.03.545] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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33
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Ryu I, Kobayashi S, Hirao H, Kawauchi T. Novel Radical Cyclization Method Accompanied by Elimination of Hydrazyl Radical. HETEROCYCLES 2010. [DOI: 10.3987/com-09-s(s)115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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34
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Kyne SH, Lin CY, Ryu I, Coote ML, Schiesser CH. First determination of the rate constant for ring-closure of an azahexenoyl radical: 6-aza-7-ethyl-5-hexenoyl. Chem Commun (Camb) 2010; 46:6521-3. [DOI: 10.1039/c0cc01262a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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35
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36
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Portela-Cubillo F, Scott JS, Walton JC. Microwave-promoted syntheses of quinazolines and dihydroquinazolines from 2-aminoarylalkanone O-phenyl oximes. J Org Chem 2009; 74:4934-42. [PMID: 19449842 DOI: 10.1021/jo900629g] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A wide range of biologically active compounds contain the quinazoline ring system. A new free-radical-based method of making functionalized quinazolines is described, which relies on microwave-promoted reactions of O-phenyl oximes with aldehydes. A small set of 2-aminoaryl alkanone O-phenyl oximes was prepared and shown to produce dihydroquinazolines when mixed with an aldehyde in toluene and subjected to microwave heating. When ZnCl(2) was included in the reaction mixture, fully aromatic quinazolines were produced in high yields by a rapid and convenient process. The method worked well with alkyl, aryl, and heterocyclic aldehydes and for a variety of substituents in the benzenic part of the molecule. Similar reactions employing ketones instead of aldehydes were less efficient. Although some dihydroquinazolines did form, they were accompanied by several byproducts. Surprisingly, in each case, one of the byproducts was a quinoline derivative, and a plausible mechanism to account for this rearrangement is proposed.
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37
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Abstract
All in one pot! Radical, radical-ionic, and radical-organometallic MCR are highly convergent processes, representing a useful pathway to molecular and structural diversity (see scheme). This concept article highlights recent developments in the field and shows the potential of the strategy for the economical elaboration of various kinds of organic substrates.Progress in multicomponent reactions (MCRs) based on ionic and organometallic processes has recently allowed the synthesis, with high efficiency, of large collections of drug-like molecules. In contrast, MCRs based on cascade radical reactions appear to have attracted, so far, much less interest. This concept article highlights the latest progress in the field and underlines the potential of such an approach. The collected examples demonstrate that radical and radical-ionic MCRs are highly convergent processes leading to useful structural diversity.
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Affiliation(s)
- Edouard Godineau
- University Bordeaux-1, Institut des Sciences Moléculaires, ISM-UMR 5255, 351, cours de la libération 33405 Talence Cedex, France
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38
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39
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Naito T, Ueda M, Miyabe H, Nonoguchi N, Miyata O, Tamura O. Intermolecular Carbon Radical Addition to Cyclic Nitrone. HETEROCYCLES 2009. [DOI: 10.3987/com-08-s(d)39] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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40
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Albrecht Ł, Richter B, Krawczyk H, Jørgensen KA. Enantioselective Organocatalytic Approach to α-Methylene-δ-lactones and δ-Lactams. J Org Chem 2008; 73:8337-43. [DOI: 10.1021/jo801582t] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Łukasz Albrecht
- Danish National Research Foundation, Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark, and Institute of Organic Chemistry, Technical University (Politechnika), 90-924 Łódź, Zeromskiego 116, Poland
| | - Bo Richter
- Danish National Research Foundation, Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark, and Institute of Organic Chemistry, Technical University (Politechnika), 90-924 Łódź, Zeromskiego 116, Poland
| | - Henryk Krawczyk
- Danish National Research Foundation, Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark, and Institute of Organic Chemistry, Technical University (Politechnika), 90-924 Łódź, Zeromskiego 116, Poland
| | - Karl Anker Jørgensen
- Danish National Research Foundation, Center for Catalysis, Department of Chemistry, Aarhus University, DK-8000 Aarhus C, Denmark, and Institute of Organic Chemistry, Technical University (Politechnika), 90-924 Łódź, Zeromskiego 116, Poland
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41
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Homogeneous catalytic aminocarbonylation of 1-iodo-1-dodecene. The facile synthesis of odd-number carboxamides via palladium-catalysed aminocarbonylation. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.08.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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42
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Nsouli NH, Mouawad I, Hasanayn F. DFT Study of the Products, Potential Energy Surface, and Substituent Effects for Methyl Radical Addition to [Rh(PMe3)2(CO)X] (X = Halogen or CN). Organometallics 2008. [DOI: 10.1021/om701079m] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nadeen H. Nsouli
- Department of Chemistry, The American University of Beirut, Beirut, Lebanon
| | - Issaaf Mouawad
- Department of Chemistry, The American University of Beirut, Beirut, Lebanon
| | - Faraj Hasanayn
- Department of Chemistry, The American University of Beirut, Beirut, Lebanon
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43
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Kyne SH, Schiesser CH, Matsubara H. Multiorbital Interactions during Acyl Radical Addition Reactions Involving Imines and Electron-Rich Olefins. J Org Chem 2007; 73:427-34. [DOI: 10.1021/jo701825y] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sara H. Kyne
- School of Chemistry, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia, and Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Carl H. Schiesser
- School of Chemistry, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia, and Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Hiroshi Matsubara
- School of Chemistry, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia, and Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
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44
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Hasanayn F, Nsouli NH, Al-Ayoubi A, Goldman AS. Addition of Alkyl Radicals to Transition-Metal-Coordinated CO: Calculation of the Reaction of [Ru(CO)5] and Related Complexes and Relevance to Alkane Carbonylation. J Am Chem Soc 2007; 130:511-21. [DOI: 10.1021/ja072704f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Faraj Hasanayn
- Department of Chemistry, The American University of Beirut, Beirut, Lebanon, and Department of Chemistry, Rutgers University, Piscataway, New Jersey 08855
| | - Nadeen H. Nsouli
- Department of Chemistry, The American University of Beirut, Beirut, Lebanon, and Department of Chemistry, Rutgers University, Piscataway, New Jersey 08855
| | - Adnan Al-Ayoubi
- Department of Chemistry, The American University of Beirut, Beirut, Lebanon, and Department of Chemistry, Rutgers University, Piscataway, New Jersey 08855
| | - Alan S. Goldman
- Department of Chemistry, The American University of Beirut, Beirut, Lebanon, and Department of Chemistry, Rutgers University, Piscataway, New Jersey 08855
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45
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Zhao X, Yu Z, Xu T, Wu P, Yu H. Novel Brønsted Acid Catalyzed Three-Component Alkylations of Indoles with N-Phenylselenophthalimide and Styrenes. Org Lett 2007; 9:5263-6. [DOI: 10.1021/ol7024795] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiaodan Zhao
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian, Liaoning 116023, PR China
| | - Zhengkun Yu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian, Liaoning 116023, PR China
| | - Tongyu Xu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian, Liaoning 116023, PR China
| | - Ping Wu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian, Liaoning 116023, PR China
| | - Haifeng Yu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), 457 Zhongshan Road, Dalian, Liaoning 116023, PR China
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46
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Clark AJ, Geden JV, Thom S, Wilson P. Regiochemistry of Copper(I)-Mediated Cyclization Reactions of Halo-dienamides. J Org Chem 2007; 72:5923-6. [PMID: 17602591 DOI: 10.1021/jo070680p] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reaction of 2-substituted dienamides with catalytic amounts of copper halide/tripyridylamine (TPA) furnishes either 5-exo or 6-endo products with the outcome dependent upon the radical initiating unit. Reaction of 3-substituted dienamides produces beta-lactams via a 4-exo cyclization with termination of the reaction occurring via either halogen atom transfer, trapping with oxygen, elimination, or radical-radical coupling depending upon the diene.
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Affiliation(s)
- Andrew J Clark
- Department of Chemistry, University of Warwick, Coventry, West Midlands, U.K.
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47
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Schiesser CH, Wille U, Matsubara H, Ryu I. Radicals masquerading as electrophiles: dual orbital effects in nitrogen-philic acyl radical cyclization and related addition reactions. Acc Chem Res 2007; 40:303-13. [PMID: 17444607 DOI: 10.1021/ar600015v] [Citation(s) in RCA: 128] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Free-radical chemistry has come a long way in a relatively short period of time. The synthetic practitioner takes for granted the wealth of mechanistic and rate constant data now available and can apply free-radical techniques to the synthesis of many different classes of target molecule with confidence. Despite this, there are still mechanistic anomalies that need to be addressed. This Account highlights recent work involving nucleophilic radicals with low-lying unoccupied orbitals, such as acyl, oxyacyl, silyl, stannyl, and germyl radicals. Through interesting singly occupied molecular orbital (SOMO)-pi* and highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) interactions during these reactions, the radicals involved are able to mask as electrophiles, providing high levels of regiocontrol and efficient methods for the synthesis of important heterocycles.
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Affiliation(s)
- Carl H Schiesser
- School of Chemistry, The University of Melbourne, Victoria, Australia
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48
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Uenoyama Y, Fukuyama T, Ryu I. Synthesis of Lactams by Radical Substitution Reaction of α,β-Unsaturated Acyl Radicals at Amine Nitrogen. Org Lett 2007; 9:935-7. [PMID: 17261008 DOI: 10.1021/ol070080c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Substitution at nitrogen by alpha,beta-unsaturated acyl radicals took place accompanied by elimination of an alpha-phenethyl radical. This reaction led to the development of a new carbonylative annulation method for five- to seven-membered ring lactams.
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Affiliation(s)
- Yoshitaka Uenoyama
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
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49
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Kyne SH, Schiesser CH, Matsubara H. Multi-component orbital interactions during oxyacyl radical addition reactions involving imines and electron-rich olefins. Org Biomol Chem 2007; 5:3938-43. [DOI: 10.1039/b714324a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Ryu I, Uenoyama Y, Matsubara H. Carbonylative Approaches to α,β-Unsaturated Acyl Radicals and α-Ketenyl Radicals. Their Structure and Applications in Synthesis. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2006. [DOI: 10.1246/bcsj.79.1476] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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