1
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Liu M, Liu B, Wang Q, Feng K, Li Y, Liu L, Tong J. Metal-free synthesis of 1,3-dichloro-1,5-diarylpentan-5-ones via cascade oxidative radical addition of styrenes with CHCl 3. Org Biomol Chem 2024; 22:699-702. [PMID: 37999925 DOI: 10.1039/d3ob01403g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
A novel and efficient metal-free cascade oxidative radical addition of styrenes is developed for the construction of 1,3-dichloro-1,5-diarylpentan-5-ones. This protocol presents a practical one-pot procedure that delivers highly functionalized 1,3-dichloro-1,5-diarylpentan-5-ones in moderate-to-good yields with a broad substrate scope under mild conditions.
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Affiliation(s)
- Min Liu
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China.
- Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, Huizhou 516001, Guangdong, P. R. China
| | - Bifu Liu
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China.
- Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, Huizhou 516001, Guangdong, P. R. China
| | - Qian Wang
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China.
| | - Kejun Feng
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China.
| | - Yuanhua Li
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China.
| | - Lixin Liu
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China.
| | - Jiaen Tong
- School of Chemistry and Materials Engineering, Huizhou University, Huizhou 516007, China.
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2
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Epping RF, Vesseur D, Zhou M, de Bruin B. Carbene Radicals in Transition-Metal-Catalyzed Reactions. ACS Catal 2023; 13:5428-5448. [PMID: 37123600 PMCID: PMC10127290 DOI: 10.1021/acscatal.3c00591] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/21/2023] [Indexed: 04/08/2023]
Abstract
Discovered as organometallic curiosities in the 1970s, carbene radicals have become a staple in modern-day homogeneous catalysis. Carbene radicals exhibit nucleophilic radical-type reactivity orthogonal to classical electrophilic diamagnetic Fischer carbenes. Their successful catalytic application has led to the synthesis of a myriad of carbo- and heterocycles, ranging from simple cyclopropanes to more challenging eight-membered rings. The field has matured to employ densely functionalized chiral porphyrin-based platforms that exhibit high enantio-, regio-, and stereoselectivity. Thus far the focus has largely been on cobalt-based systems, but interest has been growing for the past few years to expand the application of carbene radicals to other transition metals. This Perspective covers the advances made since 2011 and gives an overview on the coordination chemistry, reactivity, and catalytic application of carbene radical species using transition metal complexes and catalysts.
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Affiliation(s)
- Roel F.J. Epping
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Group, van ‘t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - David Vesseur
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Group, van ‘t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Minghui Zhou
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Group, van ‘t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Bas de Bruin
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Group, van ‘t Hoff Institute for Molecular Sciences (HIMS), University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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3
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Zhou K, Xia S, Liu Y, Chen Z. An electrochemical tandem Michael addition, azidation and intramolecular cyclization strategy for the synthesis of imidazole derivatives. Org Biomol Chem 2022; 20:7840-7844. [PMID: 36172809 DOI: 10.1039/d2ob01501c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An electrochemical-oxidation-induced intramolecular annulation used for the synthesis of imidazole was developed under undivided electrolytic conditions. In an undivided cell, amines, alkynes and azides could smoothly participate in the transformation to furnish a variety of substituted imidazoles through the tandem Michael addition/azide/cycloamine reaction. The reaction could be easily handled and avoided the use of both transition metal catalysts and peroxide reagents, which is in line with the concept of green chemistry.
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Affiliation(s)
- Kai Zhou
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Shendan Xia
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Yanming Liu
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Zhiwei Chen
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
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4
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Shou J, Qing F. Three‐Component Reaction of Pentafluorosulfanyl Chloride, Alkenes and Diazo Compounds and Synthesis of Pentafluorosulfanylfurans. Angew Chem Int Ed Engl 2022; 61:e202208860. [DOI: 10.1002/anie.202208860] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Indexed: 12/16/2022]
Affiliation(s)
- Jia‐Yi Shou
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry University of Chinese Academy of Science Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Feng‐Ling Qing
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry University of Chinese Academy of Science Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
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5
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Peng CC, Long F, Zhang KY, Hu YC, Wu LJ. Copper(I)-Catalyzed Cross-Coupling of Arylsulfonyl Radicals with Diazo Compounds: Assembly of Arylsulfones. J Org Chem 2022; 87:12265-12273. [PMID: 36037316 DOI: 10.1021/acs.joc.2c01443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel copper-catalyzed cross-coupling of arylsulfonyl radicals with diazo compounds is described for the synthesis of various arylsulfones under mild conditions. In this reaction, the cheap, environmentally friendly, and readily available inorganic K2S2O5 is employed as the sulfur dioxide source for providing arylsulfonyl radicals. In addition, a radical mechanism involving the insertion of sulfur dioxide with aryl radicals followed by the coupling of arylsulfonyl radicals with copper carbenes is proposed.
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Affiliation(s)
- Chuan-Chong Peng
- College of Sciences, Central South University of Forestry and Technology, Changsha 410004, China
| | - Fang Long
- College of Sciences, Central South University of Forestry and Technology, Changsha 410004, China.,Department of Hunan Cuisine, ChangSha Commerce & Tourism College, Changsha 410116, China
| | - Kai-Yi Zhang
- College of Sciences, Central South University of Forestry and Technology, Changsha 410004, China
| | - Yun-Chu Hu
- College of Sciences, Central South University of Forestry and Technology, Changsha 410004, China
| | - Li-Jun Wu
- College of Sciences, Central South University of Forestry and Technology, Changsha 410004, China.,Beijing National Laboratory for Molecular Sciences, Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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6
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Plöger S, Mück-Lichtenfeld C, Daniliuc CG, Studer A. Azodioxy compounds as precursors for C-radicals and their application in thermal styrene difunctionalization. Chem Sci 2022; 13:9749-9754. [PMID: 36091902 PMCID: PMC9400666 DOI: 10.1039/d2sc03860a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 08/03/2022] [Indexed: 11/21/2022] Open
Abstract
An atom-economic thermal α,β-difunctionalization of various styrenes with readily prepared azodioxy compounds is reported. Mechanistic studies reveal that the starting azodioxy compounds can thermally be cleaved to the corresponding C-nitroso compounds, which under these thermal conditions further homolyze to generate reactive C-radicals along with the persistent NO radical. In the presence of a styrene, C-radical addition with subsequent nitrosylation followed by tautomerization is occurring, resulting in an overall styrene β-alkylation-α-oximation reaction.
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Affiliation(s)
- Stefanie Plöger
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Christian Mück-Lichtenfeld
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
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7
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Shou JY, Qing FL. Three‐Component Reaction of Pentafluorosulfanyl Chloride, Alkenes and Diazo Compounds and Synthesis of Pentafluorosulfanylfurans. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jia-Yi Shou
- Shanghai Institute of Organic Chemistry Key Laboratory of Organofluorine Chemistry CHINA
| | - Feng-Ling Qing
- Shanghai Institute of Organic Chemistry Laboratory of Organofluorine Chemistry 345 lingling Lu 200032 Shanghai CHINA
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8
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Li F, Zhu S, Koenigs RM. Photocatalytic 1,2-oxo-alkylation reaction of styrenes with diazoacetates. Chem Commun (Camb) 2022; 58:7526-7529. [PMID: 35703319 DOI: 10.1039/d2cc02414d] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report on the photocatalytic 1,2-difunctionalization reaction of styrenes with acceptor-only diazoalkanes. In the presence of DABCO and tBuOOH, the carbene reactivity of diazoalkanes can be suppressed and a 1,2 oxo-alkylation reaction can be achieved (32 examples, up to 94% yield) without the formation of cyclopropane by-products via the formation of radical intermediates from ethyl diazoacetate.
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Affiliation(s)
- Fang Li
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany.
| | - Siqi Zhu
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany.
| | - Rene M Koenigs
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany.
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9
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Chen R, Wang Y, Wang ZY, Ma X, Xu C, Wang KK, Sun A. Cobalt-catalyzed decarboxylative oxyalkylation of styrenes with α-cyanoacid: access to γ‑ketonitriles. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Hao X, Ji H, Zhan H, Zhang Q, Li D. Cobalt Catalyst‐Controlled Selective Dioxygenation of Styrenes Using
N‐
Hydroxyphthalimide with Molecular Oxygen. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202100921] [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)
- Xiaosong Hao
- Hubei Provincial Key Laboratory of Green Materials for Light Industry Hubei University of Technology Wuhan 430068 People's Republic of China
| | - Huihui Ji
- Hubei Provincial Key Laboratory of Green Materials for Light Industry Hubei University of Technology Wuhan 430068 People's Republic of China
| | - Hongju Zhan
- Hubei Provincial Key Laboratory of Drug Synthesis and Optimization Jingchu University of Technology Jingmen 448000 People's Republic of China
| | - Qian Zhang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry Hubei University of Technology Wuhan 430068 People's Republic of China
| | - Dong Li
- Hubei Provincial Key Laboratory of Green Materials for Light Industry Hubei University of Technology Wuhan 430068 People's Republic of China
- Hubei Provincial Key Laboratory of Drug Synthesis and Optimization Jingchu University of Technology Jingmen 448000 People's Republic of China
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11
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Xiao D, Liu H, Zhou P, Zhang J, Liu W. I 2/ t-Butylhydroperoxide (TBHP)-Mediated Oxo-amidation of Alkenes with N, N-Dimethylformamide: A Facile Access to Aryl- α-ketoamide Derivatives. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202110005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Xie J, Xu P, Zhu Y, Wang J, Lee WCC, Zhang XP. New Catalytic Radical Process Involving 1,4-Hydrogen Atom Abstraction: Asymmetric Construction of Cyclobutanones. J Am Chem Soc 2021; 143:11670-11678. [PMID: 34292709 PMCID: PMC8399868 DOI: 10.1021/jacs.1c04968] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
While alkyl radicals have been well demonstrated to undergo both 1,5- and 1,6-hydrogen atom abstraction (HAA) reactions, 1,4-HAA is typically a challenging process both entropically and enthalpically. Consequently, chemical transformations based on 1,4-HAA have been scarcely developed. Guided by the general mechanistic principles of metalloradical catalysis (MRC), 1,4-HAA has been successfully incorporated as a key step, followed by 4-exo-tet radical substitution (RS), for the development of a new catalytic radical process that enables asymmetric 1,4-C-H alkylation of diazoketones for stereoselective construction of cyclobutanone structures. The key to success is the optimization of the Co(II)-based metalloradical catalyst through judicious modulation of D2-symmetric chiral amidoporphyrin ligand to adopt proper steric, electronic, and chiral environments that can utilize a network of noncovalent attractive interactions for effective activation of the substrate and subsequent radical intermediates. Supported by an optimal chiral ligand, the Co(II)-based metalloradical system, which operates under mild conditions, is capable of 1,4-C-H alkylation of α-aryldiazoketones with varied electronic and steric properties to construct chiral α,β-disubstituted cyclobutanones in good to high yields with high diastereoselectivities and enantioselectivities, generating dinitrogen as the only byproduct. Combined computational and experimental studies have shed light on the mechanistic details of the new catalytic radical process, including the revelation of facile 1,4-HAA and 4-exo-tet-RS steps. The resulting enantioenriched α,β-disubstituted cyclobutanones, as showcased with several enantiospecific transformations to other types of cyclic structures, may find useful applications in stereoselective organic synthesis.
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Affiliation(s)
- Jingjing Xie
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Pan Xu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Yiling Zhu
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Jingyi Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Wan-Chen Cindy Lee
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - X Peter Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
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13
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Zhang J, Zhou P, Yin A, Zhang S, Liu W. Synthetic Route to Enaminones via Metal-Free Four-Component Sequential Reactions of Aryl Olefins with CHCl 3, Et 3N, and TBHP. J Org Chem 2021; 86:8980-8986. [PMID: 34125540 DOI: 10.1021/acs.joc.1c00823] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient and modular strategy was used to obtain enaminones with a wide range of functional groups via a four-component sequential reaction. This reaction proceeded under mild conditions without a catalyst in one pot. Furthermore, the products could be transformed into thiadiazoles.
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Affiliation(s)
- Jiantao Zhang
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, P. R. China
| | - Peng Zhou
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, P. R. China
| | - Aiguo Yin
- College of Biological and Food Engineering, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, P. R. China
| | - Shuhua Zhang
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, P. R. China
| | - Weibing Liu
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, P. R. China
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14
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Shou JY, Xu XH, Qing FL. Chemoselective Hydro(Chloro)pentafluorosulfanylation of Diazo Compounds with Pentafluorosulfanyl Chloride. Angew Chem Int Ed Engl 2021; 60:15271-15275. [PMID: 33928731 DOI: 10.1002/anie.202103606] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 04/26/2021] [Indexed: 11/09/2022]
Abstract
Pentafluorosulfanyl chloride (SF5 Cl) is the most prevalent reagent for the incorporation of SF5 group into organic compounds. However, the preparation of SF5 Cl often relies on hazardous reagents and specialized apparatus. Herein, we described a safe and practical synthesis of a bench-stable and easy-to-handle solution of SF5 Cl in n-hexane under gas-reagent-free conditions. The synthetic application of SF5 Cl was demonstrated through the unprecedented reaction with diazo compounds. The chemoselective hydro- and chloropentafluorosulfanylations of α-diazo carbonyl compounds were developed in the presence of K3 PO4 or copper catalyst, respectively. These reactions provide a direct and efficient access to various α-pentafluorosulfanyl carbonyl compounds of high value for potential applications.
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Affiliation(s)
- Jia-Yi Shou
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Science, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Xiu-Hua Xu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Science, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Feng-Ling Qing
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Science, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
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15
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Shou J, Xu X, Qing F. Chemoselective Hydro(Chloro)pentafluorosulfanylation of Diazo Compounds with Pentafluorosulfanyl Chloride. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103606] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jia‐Yi Shou
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Science Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Xiu‐Hua Xu
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Science Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Feng‐Ling Qing
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Science Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
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16
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Wang NX, Xing Y, Zhang LY, Wu YH. C(sp3)–H Bond Functionalization of Alcohols, Ketones, Nitriles, Ethers and Amides using tert-Butyl Hydroperoxide as a Radical Initiator. Synlett 2021. [DOI: 10.1055/s-0040-1706406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The C(sp3)–H bond is found widely in organic molecules. Recently, the functionalization of C(sp3)–H bonds has developed into a powerful tool for augmenting highly functionalized frameworks in organic synthesis. Based on the results obtained in our group, the present account mainly summarizes recent progress on the functionalization of C(sp3)–H bonds of aliphatic alcohols, ketones, alkyl nitriles, and ethers with styrene or cinnamic acid using tert-butyl hydroperoxide (TBHP) as a radical initiator.1 Introduction2 Oxidative Coupling of Styrenes with C(sp3)–H Bonds3 Decarboxylative Cross-Couplings of α,β-Unsaturated Carboxylic Acids with C(sp3)–H Bonds4 Conclusions
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Affiliation(s)
- Nai-Xing Wang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
| | - Yalan Xing
- Department of Chemistry, William Paterson University of New Jersey
| | - Lei-Yang Zhang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
| | - Yue-Hua Wu
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences
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17
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Zhang J, Xiao D, Tan H, Liu W. Highly Selective Synthesis of 2- tert-Butoxy-1-Arylethanones via Copper(I)-Catalyzed Oxidation/ tert-Butoxylation of Aryl Olefins with TBHP. J Org Chem 2020; 85:3929-3935. [PMID: 32052627 DOI: 10.1021/acs.joc.9b03156] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A practical and environmentally friendly protocol for the selective oxidation of aryl olefins to arylethanone derivatives by using a Cu(I) catalyst and tert-butyl hydroperoxide (TBHP) has been developed. A series of 2-tert-butoxy-1-arylethanones were obtained in moderate to good yields under mild conditions with high selectivity. In this method, TBHP acts not only as an oxidant but also as the tert-butoxy and carbonyl oxygen sources. This enables one-step oxidation/tert-butoxylation. Various allyl peroxides were also synthesized from allyl substrates.
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Affiliation(s)
- Jiantao Zhang
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, People's Republic of China
| | - Duoduo Xiao
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, People's Republic of China
| | - Hua Tan
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, People's Republic of China
| | - Weibing Liu
- College of Chemistry, Guangdong University of Petrochemical Technology, Guandu Road, Maoming 525000, People's Republic of China
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18
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Chen R, Wang K, Wang Z, Ma X, Wang D, Zhang A, Liu L. Co–Catalyzed Oxidative Alkylation between Styrenes and Cyclic Ethers via sp3 C−H Functionalization. ChemistrySelect 2020. [DOI: 10.1002/slct.201904405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rongxiang Chen
- College of Chemistry and Chemical Engineering Xinxiang University, Xinxiang Henan 453000 P. R. China
| | - Kai‐Kai Wang
- College of Chemistry and Chemical Engineering Xinxiang University, Xinxiang Henan 453000 P. R. China
| | - Zhan‐Yong Wang
- College of Chemistry and Chemical Engineering Xinxiang University, Xinxiang Henan 453000 P. R. China
| | - Xueji Ma
- College of Chemistry and Chemical Engineering Xinxiang University, Xinxiang Henan 453000 P. R. China
| | - Doudou Wang
- College of Chemistry and Chemical Engineering Xinxiang University, Xinxiang Henan 453000 P. R. China
| | - An‐an Zhang
- College of Chemistry and Chemical Engineering Shangqiu Normal University, Shangqiu Henan 476000 P. R. China
| | - Lantao Liu
- College of Chemistry and Chemical Engineering Shangqiu Normal University, Shangqiu Henan 476000 P. R. China
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19
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Wang H, Lian P, Zheng Y, Li J, Wan X. Cross coupling of sulfonyl radicals with silver-based carbenes: a simple approach to β-carbonyl arylsulfones. Org Biomol Chem 2020; 18:2163-2169. [DOI: 10.1039/d0ob00091d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A radical–carbene coupling reaction of sulfonyl radicals and silver-based carbenes has been well established, which provides an efficient approach to various β-carbonyl arylsulfones.
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Affiliation(s)
- Hanghang Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Pengcheng Lian
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Yonggao Zheng
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Jingjing Li
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
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20
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Wang XD, Zhu LH, Liu P, Wang XY, Yuan HY, Zhao YL. Copper-Catalyzed Cascade Cyclization Reactions of Diazo Compounds with tert-Butyl Nitrite and Alkynes: One-Pot Synthesis of Isoxazoles. J Org Chem 2019; 84:16214-16221. [PMID: 31779304 DOI: 10.1021/acs.joc.9b02760] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel copper-catalyzed [3 + 2] cycloaddition reaction of alkynes with nitrile oxides generated in situ from the coupling reaction of copper carbene and nitroso radical has been developed. The three-component reaction provides a simple and efficient method for the construction of isoxazoles in a highly regioselective manner in a single step. On the basis of the experimental results and density functional theory calculations, a catalytic cycle (CuI-CuII-Cu0-CuI) for this cascade cyclization reaction is proposed.
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Affiliation(s)
- Xue-Di Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry , Northeast Normal University , Changchun 130024 , China
| | - Li-Han Zhu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry , Northeast Normal University , Changchun 130024 , China
| | - Pei Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry , Northeast Normal University , Changchun 130024 , China
| | - Xin-Yu Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry , Northeast Normal University , Changchun 130024 , China
| | - Hai-Yan Yuan
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry , Northeast Normal University , Changchun 130024 , China
| | - Yu-Long Zhao
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, Faculty of Chemistry , Northeast Normal University , Changchun 130024 , China
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21
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Affiliation(s)
- Guojiao Wu
- Department of ChemistryUniversity of Hamburg Martin Luther King Pl 6 20146 Hamburg Germany
| | - Jennifer Börger
- Department of ChemistryUniversity of Hamburg Martin Luther King Pl 6 20146 Hamburg Germany
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22
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Wu G, Börger J, Jacobi von Wangelin A. A Carbene-Extended ATRA Reaction. Angew Chem Int Ed Engl 2019; 58:17241-17245. [PMID: 31613415 PMCID: PMC6900008 DOI: 10.1002/anie.201909872] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 09/03/2019] [Indexed: 12/27/2022]
Abstract
Atom-transfer radical addition (ATRA) reactions have gained a strong foothold in organic synthesis by virtue of their operational simplicity, synthetic versatility, and perfect atom economy. A rich chemical space can be accessed through clever combinations of the simple starting materials. Many variations of this general motif have been reported. However, the vast majority involve the addition of an organic halide across a C=C double bond, resulting in the formation of 1,2-bifunctional products. This report introduces a significant expansion of this general reactivity concept to give 1,3-bifunctional adducts through the combination of 1,1-ATRA to a carbenoid and 1,2-ATRA to an alkyne. Both processes operate under mild conditions (RT, 5 h) with the same commercial catalyst (CoBr2 , dppbz).
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Affiliation(s)
- Guojiao Wu
- Department of ChemistryUniversity of HamburgMartin Luther King Pl 620146HamburgGermany
| | - Jennifer Börger
- Department of ChemistryUniversity of HamburgMartin Luther King Pl 620146HamburgGermany
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23
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Zhao J, Li P, Xu Y, Shi Y, Li F. Nickel-Catalyzed Transformation of Diazoacetates to Alkyl Radicals Using Alcohol as a Hydrogen Source. Org Lett 2019; 21:9386-9390. [DOI: 10.1021/acs.orglett.9b03610] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jingjing Zhao
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Pan Li
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
- Key Laboratory of Natural Medicine and Immuno-Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Yaohua Xu
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Yixin Shi
- Institute of Functional Organic Molecular Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Fuwei Li
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
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24
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Xiong M, Liang X, Gao Z, Lei A, Pan Y. Synthesis of Isoxazolines and Oxazines by Electrochemical Intermolecular [2 + 1 + n] Annulation: Diazo Compounds Act as Radical Acceptors. Org Lett 2019; 21:9300-9305. [PMID: 31713430 DOI: 10.1021/acs.orglett.9b03306] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reported herein is an unprecedented synthesis of isoxazolines and oxazines through electrochemical intermolecular annulation of alkenes with tert-butyl nitrite, in which diazo compounds serve as radical acceptors. Notably, [2 + 1 + 2] and [2 + 1 + 3] annulations occur when styrenes and allylbenzenes are used as substrates, respectively. The latter reaction undergoes group migration to form more stable radical, manifesting radical route instead of conventional 1,3-dipolar cycloaddition occurs. Moreover, scale-up experiments suggest the potential application value of these transformations in industry.
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Affiliation(s)
- Mingteng Xiong
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , P. R. China
| | - Xiao Liang
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , P. R. China
| | - Zhan Gao
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , P. R. China
| | - Aiwen Lei
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences , Wuhan University , Wuhan 430072 , P. R. China
| | - Yuanjiang Pan
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , Zhejiang , P. R. China
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25
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Affiliation(s)
- Dirk Leifert
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Deutschland
| | - Armido Studer
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology State Key Laboratory of Structural Chemistry Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences 155 Yangqiao Road West Fuzhou Fujian 350002 P. R. China
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Deutschland
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26
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Leifert D, Studer A. The Persistent Radical Effect in Organic Synthesis. Angew Chem Int Ed Engl 2019; 59:74-108. [PMID: 31116479 DOI: 10.1002/anie.201903726] [Citation(s) in RCA: 394] [Impact Index Per Article: 78.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Indexed: 12/14/2022]
Abstract
Radical-radical couplings are mostly nearly diffusion-controlled processes. Therefore, the selective cross-coupling of two different radicals is challenging and not a synthetically valuable transformation. However, if the radicals have different lifetimes and if they are generated at equal rates, cross-coupling will become the dominant process. This high cross-selectivity is based on a kinetic phenomenon called the persistent radical effect (PRE). In this Review, an explanation of the PRE supported by simulations of simple model systems is provided. Radical stabilities are discussed within the context of their lifetimes, and various examples of PRE-mediated radical-radical couplings in synthesis are summarized. It is shown that the PRE is not restricted to the coupling of a persistent with a transient radical. If one coupling partner is longer-lived than the other transient radical, the PRE operates and high cross-selectivity is achieved. This important point expands the scope of PRE-mediated radical chemistry. The Review is divided into two parts, namely 1) the coupling of persistent or longer-lived organic radicals and 2) "radical-metal crossover reactions"; here, metal-centered radical species and more generally longer-lived transition-metal complexes that are able to react with radicals are discussed-a field that has flourished recently.
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Affiliation(s)
- Dirk Leifert
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149, Münster, Germany
| | - Armido Studer
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P. R. China.,Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149, Münster, Germany
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27
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Cobalt‐Catalyzed Oxyalkylation of Styrenes via α‐C(Sp
3
)−H Bond Activation of Ethers Without Organic Peroxides. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900454] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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28
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Demarteau J, Debuigne A, Detrembleur C. Organocobalt Complexes as Sources of Carbon-Centered Radicals for Organic and Polymer Chemistries. Chem Rev 2019; 119:6906-6955. [DOI: 10.1021/acs.chemrev.8b00715] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Jérémy Demarteau
- Center for Education and Research on Macromolecules (CERM), CESAM Research Unit, University of Liège, Allée du 6 Août, Building B6A, Agora Square, 4000 Liège, Belgium
| | - Antoine Debuigne
- Center for Education and Research on Macromolecules (CERM), CESAM Research Unit, University of Liège, Allée du 6 Août, Building B6A, Agora Square, 4000 Liège, Belgium
| | - Christophe Detrembleur
- Center for Education and Research on Macromolecules (CERM), CESAM Research Unit, University of Liège, Allée du 6 Août, Building B6A, Agora Square, 4000 Liège, Belgium
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29
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Zhang T, Zhao Q, Hao W, Tu S, Jiang B. Cu‐Catalyzed [4+1] Annulation toward Indolo[2,1‐
a
]isoquinolines through Oxidative C(sp
3
)/C(sp
2
)−H Bond Bifunctionalization. Chem Asian J 2019; 14:1042-1049. [DOI: 10.1002/asia.201900050] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/12/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Tian‐Shu Zhang
- School of Chemistry and Materials ScienceJiangsu Normal University Xuzhou 221116 P. R. China
| | - Qi Zhao
- School of Chemistry and Materials ScienceJiangsu Normal University Xuzhou 221116 P. R. China
| | - Wen‐Juan Hao
- School of Chemistry and Materials ScienceJiangsu Normal University Xuzhou 221116 P. R. China
| | - Shu‐Jiang Tu
- School of Chemistry and Materials ScienceJiangsu Normal University Xuzhou 221116 P. R. China
| | - Bo Jiang
- School of Chemistry and Materials ScienceJiangsu Normal University Xuzhou 221116 P. R. China
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30
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Liu Y, Wang QL, Chen Z, Zhou CS, Xiong BQ, Zhang PL, Yang CA, Zhou Q. Oxidative radical ring-opening/cyclization of cyclopropane derivatives. Beilstein J Org Chem 2019; 15:256-278. [PMID: 30800176 PMCID: PMC6369981 DOI: 10.3762/bjoc.15.23] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 01/04/2019] [Indexed: 01/21/2023] Open
Abstract
The ring-opening/cyclization of cyclopropane derivatives has drawn great attention in the past several decades. In this review, recent efforts in the development of oxidative radical ring-opening/cyclization of cyclopropane derivatives, including methylenecyclopropanes, cyclopropyl olefins and cyclopropanols, are described. We hope this review will be of sufficient interest for the scientific community to further advance the application of oxidative radical strategies in the ring-opening/cyclization of cyclopropane derivatives.
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Affiliation(s)
- Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
| | - Qiao-Lin Wang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
| | - Zan Chen
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
| | - Cong-Shan Zhou
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
| | - Bi-Quan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
| | - Pan-Liang Zhang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
| | - Chang-An Yang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
| | - Quan Zhou
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, P. R. China
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31
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Hou J, Ee A, Cao H, Ong H, Xu J, Wu J. Visible‐Light‐Mediated Metal‐Free Difunctionalization of Alkenes with CO
2
and Silanes or C(sp
3
)−H Alkanes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811266] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jing Hou
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Aloysius Ee
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Hui Cao
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Han‐Wee Ong
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Jin‐Hui Xu
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Jie Wu
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
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32
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Hou J, Ee A, Cao H, Ong H, Xu J, Wu J. Visible‐Light‐Mediated Metal‐Free Difunctionalization of Alkenes with CO
2
and Silanes or C(sp
3
)−H Alkanes. Angew Chem Int Ed Engl 2018; 57:17220-17224. [DOI: 10.1002/anie.201811266] [Citation(s) in RCA: 159] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Jing Hou
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Aloysius Ee
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Hui Cao
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Han‐Wee Ong
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Jin‐Hui Xu
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Jie Wu
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
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33
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He K, Li P, Zhang S, Chen Q, Ji H, Yuan Y, Jia X. One-step construction of molecular complexity by tert-butyl nitrite (TBN)-initiated cascade α,β-sp 3 C-H bond difunctionalization and C-N bond cleavage. Chem Commun (Camb) 2018; 54:13232-13235. [PMID: 30406778 DOI: 10.1039/c8cc06946h] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
TBN-initiated cascade multifunctionalization of inert C-H and C-N bonds in N-arylazacycles has been realized under transition-metal free conditions, in which the synthetically useful oxime, N-NO and aldehyde functional groups were constructed in only one synthetic step.
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Affiliation(s)
- Kaixuan He
- School of Chemistry & Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu 225002, China.
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34
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Chen R, Ogunlana AA, Fang S, Long W, Sun H, Bao X, Wan X. In situ generation of nitrile oxides from copper carbene and tert-butyl nitrite: synthesis of fully substituted isoxazoles. Org Biomol Chem 2018; 16:4683-4687. [PMID: 29892743 DOI: 10.1039/c8ob01067f] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Herein, we present a novel [3 + 2] cycloaddition reaction of β-keto esters with nitrile oxides, which were generated in situ from copper carbene and tert-butyl nitrite. This three-component reaction provides new methodology for the direct synthesis of fully substituted isoxazole derivatives, featuring mild reaction conditions, readily accessible starting materials and simple operation. The experimental studies and DFT calculations suggest that the reaction starts with the generation of the key intermediate nitrile oxides, followed by a [3 + 2] cycloaddition reaction of β-keto esters to give the final isoxazole products.
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Affiliation(s)
- Rongxiang Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Abosede Adejoke Ogunlana
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Shangwen Fang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Wenhao Long
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Hongmei Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Xiaoguang Bao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Xiaobing Wan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
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35
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Wang Y, Wen X, Cui X, Zhang XP. Enantioselective Radical Cyclization for Construction of 5-Membered Ring Structures by Metalloradical C-H Alkylation. J Am Chem Soc 2018; 140:4792-4796. [PMID: 29584958 PMCID: PMC5905427 DOI: 10.1021/jacs.8b01662] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Radical cyclization represents a powerful strategy for construction of ring structures. Traditional radical cyclization, which is based on radical addition as the key step, necessitates the use of unsaturated substrates. Guided by the concept of metalloradical catalysis, a different mode of radical cyclization that can employ saturated C-H substrates is demonstrated through the development of a Co(II)-based system for catalytic activation of aliphatic diazo compounds for enantioselective radical alkylation of various C(sp3)-H bonds. It allows for efficient construction of chiral pyrrolidines and other valuable 5-membered cyclic compounds. This alternative strategy of radical cyclization provides a new retrosynthetic paradigm to prepare five-membered cyclic molecules from readily available open-chain aldehydes through the union of C-H and C=O elements for C-C bond formation.
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Affiliation(s)
- Yong Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Xin Wen
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Xin Cui
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - X. Peter Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
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36
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Karns AS, Goswami M, de Bruin B. Catalytic Synthesis of Indolines by Hydrogen Atom Transfer to Cobalt(III)-Carbene Radicals. Chemistry 2018; 24:5253-5258. [PMID: 29143995 PMCID: PMC5915749 DOI: 10.1002/chem.201704626] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 11/28/2022]
Abstract
We report a new method for the synthesis of indolines from o-aminobenzylidine N-tosylhydrazones proceeding through a cobalt(III)-carbene radical intermediate. This methodology employs the use of inexpensive commercially available reagents and allows for the transformation of easily derivatized benzaldehyde-derived precursors to functionalized indoline products. This transformation takes advantage of the known propensity of radicals to undergo rapid intramolecular 1,5-hydrogen atom transfer (1,5-HAT) to form more stabilized radical intermediates. Computational investigations using density functional theory identify remarkably low barriers for 1,5-HAT and subsequent radical rebound displacement, providing support for the proposed mechanism. We explore the effect of a variety of nitrogen substituents, and highlight the importance of adequate resonance stabilization of radical intermediates to the success of the transformation. Furthermore, we evaluate the steric and electronic effects of substituents on the aniline ring. This transformation is the first reported example of the synthesis of nitrogen-containing heterocycles from cobalt(III)-carbene radical precursors.
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Affiliation(s)
- Alexander S. Karns
- Department of ChemistryUniversity of California, Irvine1102 Natural Sciences IIIrvineCA92697-2025USA
| | - Monalisa Goswami
- Van't Hoff Institute for Molecular Sciences (HIMS)Homogeneous and Supramolecular Catalysis groupUniversity of AmsterdamScience Park 9041098XHAmsterdamThe Netherlands
| | - Bas de Bruin
- Van't Hoff Institute for Molecular Sciences (HIMS)Homogeneous and Supramolecular Catalysis groupUniversity of AmsterdamScience Park 9041098XHAmsterdamThe Netherlands
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37
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Zhu D, Yao Y, Zhao R, Liu Y, Shi L. Metal-Free Geminal Difunctionalization of Diazocarbonyl Compounds: A One-Pot Multicomponent Strategy for the Construction of α,β-Diamino Carbonyl Derivatives. Chemistry 2018; 24:4805-4809. [PMID: 29480941 DOI: 10.1002/chem.201800555] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Indexed: 01/05/2023]
Abstract
An unprecedented three-component domino oxidative coupling of diazocompounds for the efficient synthesis of α-azido-β-amino esters with non-activated dimethylamino compounds and simple TMSN3 was achieved. The main features of this method include metal-free catalysis, satisfactory functional group tolerance, general applicability in complex molecule architectures, and excellent diastereoselectivity in the presence of chiral auxiliaries. In addition, several related control experiments have been conducted to investigate the reaction mechanism.
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Affiliation(s)
- Dan Zhu
- MIIT Key Laboratory of Critical Materials Technology for, New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.,Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, P. R. China
| | - Yuan Yao
- MIIT Key Laboratory of Critical Materials Technology for, New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Rong Zhao
- MIIT Key Laboratory of Critical Materials Technology for, New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.,Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, P. R. China
| | - Yang Liu
- MIIT Key Laboratory of Critical Materials Technology for, New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
| | - Lei Shi
- MIIT Key Laboratory of Critical Materials Technology for, New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.,Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, P. R. China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China
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38
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Guo A, Han JB, Tang XY. Boryl Radicals-Triggered Selective C-H Functionalization for the Synthesis of Diverse Phenanthridine Derivatives. Org Lett 2018; 20:2351-2355. [PMID: 29584434 DOI: 10.1021/acs.orglett.8b00642] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A boryl radical-triggered C-H functionalization of aliphatic ethers/amines or DMF with isocyanides is developed to deliver diverse phenanthridine derivatives in good to excellent yields. The substrate scope is broad, and a wide range of functional groups are tolerated under the standard conditions. The rapid removal of HBPin species by 4-cyanopyridine 1-oxide provides the driving force for this reaction. This new method should make boryl radicals widely applicable in organic synthesis.
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Affiliation(s)
- Ao Guo
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan 430074 , People's Republic of China
| | - Jia-Bin Han
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan 430074 , People's Republic of China
| | - Xiang-Ying Tang
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica , Huazhong University of Science and Technology , 1037 Luoyu Road , Wuhan 430074 , People's Republic of China
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39
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Sharma P, Jain N. Chemoselective Synthesis of N
-arylbenzamides and Benzoyloxyacetanilides from Aryl Isocyanides: Styrene as Aryl and Arylcarboxymethylene Source. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Poonam Sharma
- Department of Chemistry; Indian Institute of Technology Delhi; New Delhi- 110016 India
| | - Nidhi Jain
- Department of Chemistry; Indian Institute of Technology Delhi; New Delhi- 110016 India
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40
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Li H, Zhao Y, Ma L, Ma M, Jiang J, Wan X. Radical-carbene coupling reaction: Mn-catalyzed synthesis of indoles from aromatic amines and diazo compounds. Chem Commun (Camb) 2018; 53:5993-5996. [PMID: 28513648 DOI: 10.1039/c7cc02440a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An unprecedented coupling reaction between aromatic amines and diazo compounds was well developed, which afforded a bridge connecting between radical chemistry and metal carbene chemistry. This Mn-catalyzed tandem reaction also provided a fundamentally different and practical approach to the indole skeleton under mild conditions.
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Affiliation(s)
- Huihuang Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China.
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41
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Tlahuext-Aca A, Garza-Sanchez RA, Schäfer M, Glorius F. Visible-Light-Mediated Synthesis of Ketones by the Oxidative Alkylation of Styrenes. Org Lett 2018; 20:1546-1549. [PMID: 29481096 DOI: 10.1021/acs.orglett.8b00272] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The oxidative coupling of photogenerated alkyl radicals with readily available styrenes is disclosed. This visible-light-mediated method allows rapid access to a wide range of α-alkyl-acetophenones in good yields and with high functional group tolerance. In addition, the developed protocol features room temperature conditions, low photocatalyst loadings, and the use of dimethyl sulfoxide as nontoxic and mild terminal oxidant.
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Affiliation(s)
- Adrian Tlahuext-Aca
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - R Aleyda Garza-Sanchez
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - Michael Schäfer
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
| | - Frank Glorius
- Organisch-Chemisches Institut , Westfälische Wilhelms-Universität Münster , Corrensstraße 40 , 48149 Münster , Germany
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42
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Liu X, Wu C, Zhang J, Shi Y, Zhang S, Geng Y, Tung CH, Wang W. Cobalt-catalyzed radical cyclization of isocyanides forming phenanthridine derivatives. Org Chem Front 2018. [DOI: 10.1039/c8qo00887f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A neutral cobalt(ii) compound catalyzes the radical cyclization of 2-isocyano-biphenyls with various alkyl halides, providing a series of phenanthridine-fused polycycles.
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Affiliation(s)
- Xiangyu Liu
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Chengjuan Wu
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Jing Zhang
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Yihan Shi
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Shengnan Zhang
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Yan Geng
- College of Chemistry
- Chemical Engineering and Materials Science
- Shandong Normal University
- Jinan 250014
- P. R. China
| | - Chen-Ho Tung
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
| | - Wenguang Wang
- Key Lab of Colloid and Interface Chemistry
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
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43
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Wang C, Lai J, Chen C, Li X, Cao H. Ag-Catalyzed Tandem Three-Component Reaction toward the Synthesis of Multisubstituted Imidazoles. J Org Chem 2017; 82:13740-13745. [DOI: 10.1021/acs.joc.7b02612] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Changcheng Wang
- School
of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P.R. of China
| | - Jialin Lai
- School
of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P.R. of China
| | - Cantao Chen
- School
of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P.R. of China
| | - Xuechen Li
- Department
of Chemistry, State Key Lab of Synthetic Chemistry, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Hua Cao
- School
of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Zhongshan 528458, P.R. of China
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44
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Te Grotenhuis C, Das BG, Kuijpers PF, Hageman W, Trouwborst M, de Bruin B. Catalytic 1,2-dihydronaphthalene and E-aryl-diene synthesis via Co III-Carbene radical and o-quinodimethane intermediates. Chem Sci 2017; 8:8221-8230. [PMID: 29568470 PMCID: PMC5857932 DOI: 10.1039/c7sc03909c] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 10/11/2017] [Indexed: 11/21/2022] Open
Abstract
Catalytic synthesis of substituted 1,2-dihydronaphthalenes via metalloradical activation of o-styryl N-tosyl hydrazones ((E)-2-(prop-1-en-1-yl)benzene-N-tosyl hydrazones) is presented, taking advantage of the intrinsic reactivity of a cobalt(iii)-carbene radical intermediate. The method has been successfully applied to a broad range of substrates with various R1 substituents at the aromatic ring, producing the desired ring products in good to excellent isolated yields for substrates with an R2 = COOEt substituent at the vinylic position (∼70-90%). Changing the R2 moiety from an ester to other substituents has a surprisingly large influence on the (isolated) yields. This behaviour is unexpected for a radical rebound ring-closure mechanism, and points to a mechanism proceeding via ortho-quinodimethane (o-QDM) intermediates. Furthermore, substrates with an alkyl substituent on the allylic position reacted to form E-aryl-dienes in excellent yields, rather than the expected 1,2-dihydronaphthalenes. This result, combined with the outcome of supporting DFT calculations, strongly points to the release of reactive o-QDM intermediates from the metal centre in all cases, which either undergo a 6π-cyclisation step to form the 1,2-dihydronaphthalenes, or a [1,7]-hydride shift to produce the E-aryl-dienes. Trapping experiments using TEMPO confirm the involvement of cobalt(iii)-carbene radical intermediates. EPR spectroscopic spin-trapping experiments using phenyl N-tert-butylnitrone (PBN) confirm the radical nature of the catalytic reaction.
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Affiliation(s)
- Colet Te Grotenhuis
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
| | - Braja G Das
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
| | - Petrus F Kuijpers
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
| | - Wouter Hageman
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
| | - Mees Trouwborst
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
| | - Bas de Bruin
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
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45
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Chen R, Zhao Y, Fang S, Long W, Sun H, Wan X. Coupling Reaction of Cu-Based Carbene and Nitroso Radical: A Tandem Reaction To Construct Isoxazolines. Org Lett 2017; 19:5896-5899. [DOI: 10.1021/acs.orglett.7b02885] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Rongxiang Chen
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Yanwei Zhao
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Shangwen Fang
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Wenhao Long
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Hongmei Sun
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Xiaobing Wan
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, P. R. China
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46
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Lan Y, Chang XH, Fan P, Shan CC, Liu ZB, Loh TP, Xu YH. Copper-Catalyzed Silylperoxidation Reaction of α,β-Unsaturated Ketones, Esters, Amides, and Conjugated Enynes. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02754] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yun Lan
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Xi-Hao Chang
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Pei Fan
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Cui-Cui Shan
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zi-Bai Liu
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Teck-Peng Loh
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Institute
of Advanced Synthesis, Jiangsu National Synergetic Innovation Center
for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu 210009, P. R. China
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637616
| | - Yun-He Xu
- Department
of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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47
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Zhang HY, Ge C, Zhao J, Zhang Y. Cobalt-Catalyzed Trifluoromethylation–Peroxidation of Unactivated Alkenes with Sodium Trifluoromethanesulfinate and Hydroperoxide. Org Lett 2017; 19:5260-5263. [DOI: 10.1021/acs.orglett.7b02353] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Hong-Yu Zhang
- School
of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Chao Ge
- School
of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Jiquan Zhao
- School
of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
| | - Yuecheng Zhang
- School
of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, P. R. China
- National-Local
Joint Engineering Laboratory for Energy Conservation of Chemical Process
Integration and Resources Utilization, Hebei University of Technology, Tianjin 300130, P. R. China
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48
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Lan XW, Wang NX, Xing Y. Recent Advances in Radical Difunctionalization of Simple Alkenes. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700678] [Citation(s) in RCA: 291] [Impact Index Per Article: 41.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xing-Wang Lan
- Chinese Academy of Sciences; Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences; 100190 Beijing China
| | - Nai-Xing Wang
- Chinese Academy of Sciences; Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences; 100190 Beijing China
| | - Yalan Xing
- Department of Chemistry; William Paterson University of New Jersey; 07470 Wayne New Jersey USA
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49
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Jiang H, Lang K, Lu H, Wojtas L, Zhang XP. Asymmetric Radical Bicyclization of Allyl Azidoformates via Cobalt(II)-Based Metalloradical Catalysis. J Am Chem Soc 2017; 139:9164-9167. [PMID: 28650659 PMCID: PMC5553632 DOI: 10.1021/jacs.7b05778] [Citation(s) in RCA: 104] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Cobalt(II)-based metalloradical catalysis has been successfully applied to radical bicyclization of allyl azidoformates to construct aziridine/oxazolidinone-fused bicyclic structures. The Co(II) complex of D2-symmetric chiral amidoporphyrin 3,5-DitBu-QingPhyrin has been identified as an effective metalloradical catalyst for the intramolecular radical aziridination of this type of carbonyl azides, allowing for high-yielding formation of synthetically useful chiral [3.1.0]-bicyclic aziridines with high diastereo- and enantioselectivity.
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Affiliation(s)
- Huiling Jiang
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Kai Lang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
| | - Hongjian Lu
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - Lukasz Wojtas
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
| | - X. Peter Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, Massachusetts 02467, United States
- Department of Chemistry, University of South Florida, Tampa, Florida 33620, United States
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50
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Yi H, Zhang G, Wang H, Huang Z, Wang J, Singh AK, Lei A. Recent Advances in Radical C-H Activation/Radical Cross-Coupling. Chem Rev 2017. [PMID: 28639787 DOI: 10.1021/acs.chemrev.6b00620] [Citation(s) in RCA: 853] [Impact Index Per Article: 121.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Research and industrial interest in radical C-H activation/radical cross-coupling chemistry has continuously grown over the past few decades. These reactions offer fascinating and unconventional approaches toward connecting molecular fragments with high atom- and step-economy that are often complementary to traditional methods. Success in this area of research was made possible through the development of photocatalysis and first-row transition metal catalysis along with the use of peroxides as radical initiators. This Review provides a brief and concise overview of the current status and latest methodologies using radicals or radical cations as key intermediates produced via radical C-H activation. This Review includes radical addition, radical cascade cyclization, radical/radical cross-coupling, coupling of radicals with M-R groups, and coupling of radical cations with nucleophiles (Nu).
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Affiliation(s)
- Hong Yi
- College of Chemistry and Molecular Sciences, The Institute for Advanced Studies (IAS), Wuhan University , Wuhan, Hubei 430072, China
| | - Guoting Zhang
- College of Chemistry and Molecular Sciences, The Institute for Advanced Studies (IAS), Wuhan University , Wuhan, Hubei 430072, China
| | - Huamin Wang
- College of Chemistry and Molecular Sciences, The Institute for Advanced Studies (IAS), Wuhan University , Wuhan, Hubei 430072, China
| | - Zhiyuan Huang
- College of Chemistry and Molecular Sciences, The Institute for Advanced Studies (IAS), Wuhan University , Wuhan, Hubei 430072, China
| | - Jue Wang
- College of Chemistry and Molecular Sciences, The Institute for Advanced Studies (IAS), Wuhan University , Wuhan, Hubei 430072, China
| | - Atul K Singh
- College of Chemistry and Molecular Sciences, The Institute for Advanced Studies (IAS), Wuhan University , Wuhan, Hubei 430072, China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences, The Institute for Advanced Studies (IAS), Wuhan University , Wuhan, Hubei 430072, China.,National Research Center for Carbohydrate Synthesis, Jiangxi Normal University , Nanchang 330022, China
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