51
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Liu Z, Li M, Deng G, Wei W, Feng P, Zi Q, Li T, Zhang H, Yang X, Walsh PJ. Transition-metal-free C(sp 3)-H/C(sp 3)-H dehydrogenative coupling of saturated heterocycles with N-benzyl imines. Chem Sci 2020; 11:7619-7625. [PMID: 34094139 PMCID: PMC8152681 DOI: 10.1039/d0sc00031k] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Accepted: 03/30/2020] [Indexed: 12/15/2022] Open
Abstract
A unique C(sp3)-H/C(sp3)-H dehydrocoupling of N-benzylimines with saturated heterocycles is described. Using super electron donor (SED) 2-azaallyl anions and aryl iodides as electron acceptors, single-electron-transfer (SET) generates an aryl radical. Hydrogen atom transfer (HAT) from saturated heterocycles or toluenes to the aryl radical generates alkyl radicals or benzylic radicals, respectively. The newly formed alkyl radicals and benzylic radicals couple with the 2-azaallyl radicals with formation of new C-C bonds. Experimental evidence supports the key hydrogen-abstraction by the aryl radical, which determines the chemoselectivity of the radical-radical coupling reaction. It is noteworthy that this procedure avoids the use of traditional strong oxidants and transition metals.
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Affiliation(s)
- Zhengfen Liu
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Minyan Li
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia PA USA
| | - Guogang Deng
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Wanshi Wei
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Ping Feng
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Quanxing Zi
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Tiantian Li
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
- Department of Soil and Water Science, University of Florida 2181 McCarty Hall A Gainesville FL 32611-0290 USA
| | - Hongbin Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education and Yunnan Province, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Chemical Science and Technology, Yunnan University Kunming 650091 P. R. China
| | - Patrick J Walsh
- Roy and Diana Vagelos Laboratories Penn/Merck Laboratory for High-Throughput Experimentation Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia PA USA
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52
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Zhu Z, Liu J, Dong S, Chen B, Wang Z, Tang R, Li Z. Copper‐Catalyzed Cross‐Coupling of Benzylic Bromides with Arylboronic Acids: Synthesis of Diarylalkanes and Preliminary Antifungal Evaluation Against
Magnaporthe Grisea. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Zhu Zhu
- Department of Applied Chemistry College of Materials and EnergySouth China Agricultural University Guangzhou 510642 P. R. China
| | - Jinggong Liu
- Orthopedics DepartmentGuangdong Provincial Hospital of Traditional Chinese Medicine The Second Affiliated Hospital of Guangzhou University of Chinese Medicine Guangzhou 510120 P. R. China
| | - Shoucheng Dong
- Department of Applied Chemistry College of Materials and EnergySouth China Agricultural University Guangzhou 510642 P. R. China
| | - Bolai Chen
- Orthopedics DepartmentGuangdong Provincial Hospital of Traditional Chinese Medicine The Second Affiliated Hospital of Guangzhou University of Chinese Medicine Guangzhou 510120 P. R. China
| | - Zhenghui Wang
- Department of Applied Chemistry College of Materials and EnergySouth China Agricultural University Guangzhou 510642 P. R. China
| | - Ri‐yuan Tang
- Department of Applied Chemistry College of Materials and EnergySouth China Agricultural University Guangzhou 510642 P. R. China
- Key Laboratory of Natural Pesticide & Chemical Biology Ministry of EducationSouth China Agricultural University Guangzhou 510642 P. R. China
| | - Zhaodong Li
- Department of Applied Chemistry College of Materials and EnergySouth China Agricultural University Guangzhou 510642 P. R. China
- Key Laboratory of Natural Pesticide & Chemical Biology Ministry of EducationSouth China Agricultural University Guangzhou 510642 P. R. China
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53
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Sakurai S, Tsuzuki S, Sakamoto R, Maruoka K. Cu-Catalyzed Generation of Alkyl Radicals from Alkylsilyl Peroxides and Subsequent C(sp 3)-C(sp 2) Cross-Coupling with Arylboronic Acids. J Org Chem 2020; 85:3973-3980. [PMID: 31939666 DOI: 10.1021/acs.joc.9b03294] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This work describes a novel and practical method for the Cu-catalyzed C(sp3)-C(sp2) cross-coupling of alkylsilyl peroxides with arylboronic acids. The reductive cleavage of the O-O bond of alkylsilyl peroxides and the desired cross-coupling reactions to afford alkyl-substituted aromatic rings proceed smoothly at room temperature promoted by simple Cu-based catalysts and do not require activation by visible light. The results of mechanistic investigations support a radical-mediated C(sp3)-C(sp2) bond formation via β-scission of the alkoxy radicals generated from the alkylsilyl peroxides.
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Affiliation(s)
- Shunya Sakurai
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Saori Tsuzuki
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Ryu Sakamoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.,Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto 606-8501, Japan.,School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
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54
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Diastereoselective Synthesis of 2,3,4-Trisubstituted Tetrahydrofurans via Thermally Reactive 1,5-Diene- tert-butyl Carbonates. Org Lett 2020; 22:842-847. [PMID: 31951142 DOI: 10.1021/acs.orglett.9b04306] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report that 3,3-dicyano-1,5-dienes bearing tert-butyl carbonates can be thermally converted to 2,3,4-trisubstituted tetrahydrofurans. The transformation relies on two thermally reactive functional groups, a 1,5-diene and a tert-butyl carbonate, that react cooperatively to yield the furan scaffolds by thermal Cope rearrangement, Boc deprotection, and oxy-Michael addition. Described herein is background related to the discovery, optimization, and scope of the key transformation and representative functional group interconversion chemistry for the tetrahydrofuran scaffolds.
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55
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Li Y, Sun S, Cheng J, Yu JT. Alkylarylation of N-allylbenzamides and N-allylanilines with simple ethers for the direct construction of ether substituted dihydroisoquinolinones and indolines. Org Biomol Chem 2020; 18:650-654. [PMID: 31922168 DOI: 10.1039/c9ob02565k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A radical-initiated cascade addition and cyclization of N-allylbenzamides with simple ethers to construct ether-substituted dihydroisoquinolinones was performed in the presence of CuI. The cleavage of the sp3 C-H bond in ether and the sp2 C-H bond in phenyl was involved in this reaction. Moreover, the arylalkylation of N-allylanilines was also realized under similar reaction conditions, providing ether-functionalized indolines in good to moderate yields.
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Affiliation(s)
- Yiting Li
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P. R. China.
| | - Song Sun
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P. R. China.
| | - Jiang Cheng
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P. R. China.
| | - Jin-Tao Yu
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P. R. China.
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56
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Kaur M, Van Humbeck JF. Recent trends in catalytic sp 3 C-H functionalization of heterocycles. Org Biomol Chem 2020; 18:606-617. [PMID: 31912069 DOI: 10.1039/c9ob01559k] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Heterocycles are a ubiquitous substructure in organic small molecules designed for use in materials and medicines. Recent work in catalysis has focused on enabling access to new heterocycle structures by sp3 C-H functionalization on alkyl side-chain substituents-especially at the heterobenzylic position-with more than two hundred manuscripts published just within the last ten years. Rather than describing in detail each of these reports, in this mini-review we attempt to highlight gaps in existing techniques. A semi-quantitative overview of ongoing work strongly suggests that several specific heterocycle types and bond formations outside of C-C, C-N, and C-O have been almost completely overlooked.
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Affiliation(s)
- Milanpreet Kaur
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4.
| | - Jeffrey F Van Humbeck
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada T2N 1N4.
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57
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McLaren RL, Laycock CJ, Morgan DJ, Owen GR. Boronic acids for functionalisation of commercial multi-layer graphitic material as an alternative to diazonium salts. NEW J CHEM 2020. [DOI: 10.1039/d0nj04187d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Commercially obtained plasma-synthesised multi-layer graphene was functionalised with 4-(trifluoromethyl)phenyl groups utilising the corresponding boronic acid providing a safer alternative to diazonium salts.
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Affiliation(s)
| | | | - David J. Morgan
- Cardiff Catalysis Institute
- School of Chemistry
- Cardiff University
- Cardiff
- UK
| | - Gareth R. Owen
- School of Applied Science
- University of South Wales
- Treforest
- UK
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58
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Wan Z, Yuan X, Xiao T, Wang X, Luo J. A Pd‐Catalyzed Three‐Component Reaction and Hydrogenation Strategy to Prepare 2‐Functionalized Cyclic Ethers Involving a Radical Initiating C(sp
3
)‐H Activation. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900567] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zi‐juan Wan
- School of Chemical EngineeringNanjing University of Science and Technology Nanjing 210094 China
| | - Xiao‐feng Yuan
- School of Chemical EngineeringNanjing University of Science and Technology Nanjing 210094 China
| | - Tian Xiao
- School of Chemical EngineeringNanjing University of Science and Technology Nanjing 210094 China
| | - Xiao‐rong Wang
- School of Chemical EngineeringNanjing University of Science and Technology Nanjing 210094 China
| | - Jun Luo
- School of Chemical EngineeringNanjing University of Science and Technology Nanjing 210094 China
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59
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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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60
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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: 397] [Impact Index Per Article: 79.4] [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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61
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Bao P, Yue H, Meng N, Zhao X, Li J, Wei W. Copper-Catalyzed Three-Component Reaction of Alkynes, TMSN3, and Ethers: Regiocontrollable Synthesis of N1- and N2-Oxyalkylated 1,2,3-Triazoles. Org Lett 2019; 21:7218-7222. [DOI: 10.1021/acs.orglett.9b02295] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Pengli Bao
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165 Shandong, China
| | - Huilan Yue
- Qinghai Provincial Key Laboratory of Tibetan Medicine Research and Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Qinghai 810008, China
| | - Na Meng
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165 Shandong, China
| | - Xiaohui Zhao
- Qinghai Provincial Key Laboratory of Tibetan Medicine Research and Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Qinghai 810008, China
| | - Jiangsheng Li
- School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China
| | - Wei Wei
- School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165 Shandong, China
- Qinghai Provincial Key Laboratory of Tibetan Medicine Research and Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Qinghai 810008, China
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62
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Xie X, Liu J, Wang L, Wang M. Visible-Light-Induced Alkynylation of α-C-H Bonds of Ethers with Alkynyl Bromides without External Photocatalyst. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900872] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Xiaofei Xie
- Department of Chemistry; Huaibei Normal University; 235000 Huaibei Anhui P. R. China
| | - Jie Liu
- Department of Chemistry; Huaibei Normal University; 235000 Huaibei Anhui P. R. China
| | - Lei Wang
- Department of Chemistry; Huaibei Normal University; 235000 Huaibei Anhui P. R. China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 200032 Shanghai P. R. China
| | - Min Wang
- Department of Chemistry; Huaibei Normal University; 235000 Huaibei Anhui P. R. China
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63
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Zhao F, Tan Q, Wang D, Chen J, Deng G. Efficient C−S Bond Formation by Direct Functionalization of C(
sp
3
)−H Bond Adjacent to Heteroatoms under Metal‐Free Conditions. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900666] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Feng Zhao
- Key Laboratory of Dong Medicine of Hunan Province, School of Pharmaceutical Sciences Hunan University of Medicine Huaihua 418000 China
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry Xiangtan University Xiangtan 411105 China
| | - Qi Tan
- Key Laboratory of Dong Medicine of Hunan Province, School of Pharmaceutical Sciences Hunan University of Medicine Huaihua 418000 China
| | - Dahan Wang
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry Xiangtan University Xiangtan 411105 China
| | - Jinjin Chen
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry Xiangtan University Xiangtan 411105 China
| | - Guo‐Jun Deng
- Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, Key Laboratory for Green Organic Synthesis and Application of Hunan Province, College of Chemistry Xiangtan University Xiangtan 411105 China
- Beijing National Laboratory for Molecular Sciences Chinese Academy of Sciences (CAS) Beijing 100190 China
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64
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Ding R, Lu W, Ci H, Mao Y, Liu L. Copper‐Catalyzed Oxidative Alkylation of Vinylic C
β
‐H of Enamides with Cyclic Ethers. ChemistrySelect 2019. [DOI: 10.1002/slct.201901837] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ran Ding
- College of Chemistry and Materials EngineeringAnhui Science and Technology University, Bengbu Anhui 233000 P. R.China
| | - Wang‐Gang Lu
- College of Chemistry and Materials EngineeringAnhui Science and Technology University, Bengbu Anhui 233000 P. R.China
| | - Hao Ci
- College of Chemistry and Materials EngineeringAnhui Science and Technology University, Bengbu Anhui 233000 P. R.China
| | - Yue‐Yuan Mao
- College of Chemistry and Materials EngineeringAnhui Science and Technology University, Bengbu Anhui 233000 P. R.China
| | - Lei Liu
- College of Chemistry and Materials EngineeringAnhui Science and Technology University, Bengbu Anhui 233000 P. R.China
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65
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Huang CY, Li J, Liu W, Li CJ. Diacetyl as a "traceless" visible light photosensitizer in metal-free cross-dehydrogenative coupling reactions. Chem Sci 2019; 10:5018-5024. [PMID: 31183051 PMCID: PMC6530541 DOI: 10.1039/c8sc05631e] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 04/07/2019] [Indexed: 12/22/2022] Open
Abstract
Minisci alkylation is of prime importance for its applicability in functionalizing diverse heteroarenes, which are core structures in many bioactive compounds. In alkyl radical generation processes, precious metal catalysts, high temperatures and excessive oxidants are generally involved, which lead to sustainability and safety concerns. Herein we report a new strategy using diacetyl (2,3-butanedione) as an abundant, visible light-sensitive and "traceless" hydrogen atom abstractor to achieve metal-free cross-dehydrogenative Minisci alkylation under mild conditions. Mechanistic studies supported hydrogen atom transfer (HAT) between an activated C(sp3)-H substrate and diacetyl. Moreover, with the assistance of di-tert-butyl peroxide (DTBP), the scope of the reaction could be extended to strong aliphatic C-H bonds via diacetyl-mediated energy transfer. The robustness of this strategy was demonstrated by functionalizing complex molecules such as quinine, fasudil, nicotine, menthol and alanine derivatives.
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Affiliation(s)
- Chia-Yu Huang
- Department of Chemistry , FRQNT Centre for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke St. W. , Montreal , Quebec H3A 0B8 , Canada .
| | - Jianbin Li
- Department of Chemistry , FRQNT Centre for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke St. W. , Montreal , Quebec H3A 0B8 , Canada .
| | - Wenbo Liu
- Department of Chemistry , FRQNT Centre for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke St. W. , Montreal , Quebec H3A 0B8 , Canada .
| | - Chao-Jun Li
- Department of Chemistry , FRQNT Centre for Green Chemistry and Catalysis , McGill University , 801 Sherbrooke St. W. , Montreal , Quebec H3A 0B8 , Canada .
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66
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Liu Y, Wang QL, Chen Z, Zhou Q, Li H, Xu WY, Xiong BQ, Tang KW. Oxone-Mediated Radical C–C Bond Acetmethylation/Arylation of Methylenecyclopropanes and Vinylcyclopropanes with α-Alkyl Ketones: Facile Access to Oxoalkyl-Substituted 3,4-Dihydronaphthalenes. J Org Chem 2019; 84:5413-5424. [DOI: 10.1021/acs.joc.9b00407] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Qiao-Lin Wang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Zan Chen
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Quan Zhou
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Hua Li
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Wen-Yuan Xu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Bi-Quan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
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67
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Yang S, Zhu S, Lu D, Gong Y. Formylation of Fluoroalkyl Imines through Visible-Light-Enabled H-Atom Transfer Catalysis: Access to Fluorinated α-Amino Aldehydes. Org Lett 2019; 21:2019-2024. [DOI: 10.1021/acs.orglett.9b00128] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sen Yang
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Rd., Wuhan, Hubei 430074, China
| | - Shuangyu Zhu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Rd., Wuhan, Hubei 430074, China
| | - Dengfu Lu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Rd., Wuhan, Hubei 430074, China
| | - Yuefa Gong
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Rd., Wuhan, Hubei 430074, China
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68
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Singsardar M, Laru S, Mondal S, Hajra A. Visible-Light-Induced Regioselective Cross-Dehydrogenative Coupling of 2H-Indazoles with Ethers. J Org Chem 2019; 84:4543-4550. [DOI: 10.1021/acs.joc.9b00318] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mukta Singsardar
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Sudip Laru
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Susmita Mondal
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
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69
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Singh M, Yadav LDS, Singh RKP. Direct radical sulfonylation at α-C(sp3)-H of THF with sodium sulfinates in aqueous medium. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.02.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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70
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Liu S, Qi X, Bai R, Lan Y. Theoretical Study of Ni-Catalyzed C–N Radical–Radical Cross-Coupling. J Org Chem 2019; 84:3321-3327. [DOI: 10.1021/acs.joc.8b03245] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Song Liu
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
| | - Xiaotian Qi
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Ruopeng Bai
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, and Chongqing Key Laboratory of Theoretical and Computational Chemistry, Chongqing University, Chongqing 400030, China
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
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71
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Moglie Y, Buxaderas E, Mancini A, Alonso F, Radivoy G. Amide Bond Formation Catalyzed by Recyclable Copper Nanoparticles Supported on Zeolite Y under Mild Conditions. ChemCatChem 2019. [DOI: 10.1002/cctc.201801858] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yanina Moglie
- Departmento de QuímicaINQUISUR, Universidad Nacional del Sur (UNS)-CONICET Avenida Alem 1253 Bahía Blanca 8000 Argentina
| | - Eduardo Buxaderas
- Departmento de QuímicaINQUISUR, Universidad Nacional del Sur (UNS)-CONICET Avenida Alem 1253 Bahía Blanca 8000 Argentina
| | - Agustina Mancini
- Departmento de QuímicaINQUISUR, Universidad Nacional del Sur (UNS)-CONICET Avenida Alem 1253 Bahía Blanca 8000 Argentina
| | - Francisco Alonso
- Instituto de Síntesis Orgánica (ISO) and Departamento de Química OrgánicaFacultad de CienciasUniversidad de Alicante Apdo. 99 03080 Alicante Spain
| | - Gabriel Radivoy
- Departmento de QuímicaINQUISUR, Universidad Nacional del Sur (UNS)-CONICET Avenida Alem 1253 Bahía Blanca 8000 Argentina
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72
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NiCl2-catalyzed radical cross decarboxylative coupling between arylpropiolic acids and cyclic ethers. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.01.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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73
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Chen Z, Liu B, Liang P, Luo H, Zheng J, Wen X, Liu T, Luo G, Ye M. Construction of N-S and C-N Bonds from Reactions of Benzofuroxans with DMSO or THF. ACS OMEGA 2019; 4:281-291. [PMID: 31459330 PMCID: PMC6648239 DOI: 10.1021/acsomega.8b03353] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 12/25/2018] [Indexed: 05/06/2023]
Abstract
Novel ring-opening reactions are achieved employing benzofuroxan as a new type of iminating or aminating reagent. These diverse transformations give access to three types of molecular scaffolds, N-aryl dimethylsulfoximines, methanesulfonamides, and hemiaminal ethers, which are important structural motifs in organic and medicinal chemistry. The procedures feature solvent-involved reactions, easily available starting materials, operational simplicity, high atom economy, and the potential further transformation of nitro group.
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Affiliation(s)
- Zhengwang Chen
- Key
Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P. R. China
- Key
Laboratory of Functional Molecular Engineering of Guangdong Province, South China University of Technology, Guangzhou 510640, P. R. China
- E-mail: (Z.C.)
| | - Botao Liu
- Key
Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Pei Liang
- Key
Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Haiqing Luo
- Key
Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Jing Zheng
- Key
Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Xiaowei Wen
- Key
Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Tanggao Liu
- Key
Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Guotian Luo
- Key
Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Min Ye
- Key
Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, P. R. China
- E-mail: (M.Y.)
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74
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Zhang H, Xu J, Zhou M, Zhao J, Zhang P, Li W. The visible-light-triggered regioselective alkylation of quinoxalin-2(1H)-ones via decarboxylation coupling. Org Biomol Chem 2019; 17:10201-10208. [DOI: 10.1039/c9ob02203a] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient protocol to synthesize 3-alkylated quinoxalin-2(1H)-ones through photocatalytic decarboxylation coupling reactions of quinoxalin-2(1H)-ones with N-hydroxyphthalimide ester was developed.
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Affiliation(s)
- Hongdou Zhang
- College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 311121
- China
| | - Jun Xu
- College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 311121
- China
| | - Min Zhou
- College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 311121
- China
| | - Jianming Zhao
- College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 311121
- China
| | - Pengfei Zhang
- College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 311121
- China
| | - Wanmei Li
- College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 311121
- China
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75
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Yang Y, Cai J, Luo G, Jiang Y, Su Y, Su Y, Li C, Zheng Y, Zeng J, Liu Y. Nickel-catalyzed fluoroethylation of arylboronic acids via Suzuki-type coupling. Org Chem Front 2019. [DOI: 10.1039/c9qo00066f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A new and step-economic method for the synthesis of homobenzylic fluorides through nickel-catalyzed Suzuki-type fluoroethylation coupling is developed.
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Affiliation(s)
- Yi Yang
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Junjie Cai
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Gen Luo
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Yan Jiang
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Yumei Su
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Yang Su
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Chaolin Li
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Yubin Zheng
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Jijiao Zeng
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Yingle Liu
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
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76
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Larionov VA, Stoletova NV, Kovalev VI, Smol'yakov AF, Savel'yeva TF, Maleev VI. A general synthesis of unnatural α-amino acids by iron-catalysed olefin–olefin coupling via generated radicals. Org Chem Front 2019. [DOI: 10.1039/c9qo00108e] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A general protocol for the asymmetric synthesis of unnatural α-amino acids with γ-tertiary and quaternary carbon centers via generated radicals is reported.
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Affiliation(s)
- Vladimir A. Larionov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
- Department of Inorganic Chemistry
- Peoples’ Friendship University of Russia (RUDN University)
| | - Nadezhda V. Stoletova
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Vladislav I. Kovalev
- Dmitry Mendeleev University of Chemical Technology of Russia
- 125047 Moscow
- Russian Federation
| | - Alexander F. Smol'yakov
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
- Plekhanov Russian University of Economics
- 117997 Moscow
| | - Tat'yana F. Savel'yeva
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
| | - Victor I. Maleev
- A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences
- 119991 Moscow
- Russian Federation
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77
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Deng W, Ye C, Li Y, Li D, Bao H. Iron-Catalyzed Oxyalkylation of Terminal Alkynes with Alkyl Iodides. Org Lett 2018; 21:261-265. [PMID: 30582704 DOI: 10.1021/acs.orglett.8b03689] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A general oxyalkylation of terminal alkynes enabled by iron catalysis has been developed. Primary and secondary alkyl iodides acted as the alkylating reagents and afforded a range of α-alkylated ketones under mild reaction conditions. Acetyl tert-butyl peroxide (TBPA) was used as the radical relay precursor, providing the initiated methyl radical to start the radical relay process. Preliminary mechanistic studies were conducted, and late-stage functionalizations of natural product derivatives were performed.
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Affiliation(s)
- Weili Deng
- Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, College of Life Sciences , Fujian Normal University , 1 Keji Road , Fuzhou 350117 , P. R. China
| | - Changqing Ye
- 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. of China
| | - Yajun Li
- 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. of China
| | - Daliang Li
- Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, College of Life Sciences , Fujian Normal University , 1 Keji Road , Fuzhou 350117 , P. R. China
| | - Hongli Bao
- 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. of China
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78
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Ling A, Zhang L, Tan RX, Liu ZQ. Molecular Oxygen-Promoted General and Site-Specific Alkylation with Organoboronic Acid. J Org Chem 2018; 83:14489-14497. [PMID: 30431283 DOI: 10.1021/acs.joc.8b02277] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A general alkylating method using organoboronic acid under 1 atm of oxygen is developed. It allows a facile access to a wide range of functionalized molecules with privileged scaffolds in drugs and natural products such as oxindoles, quinolinones, chromones, naphthoquinones, coumarins, and quinolones. In contrast to previous alkylation approaches that generally requiring transition-metal catalysis and a stoichiometric chemical oxidant, the present strategy features metal-free, molecular oxygen as the terminal oxidant and site specificity.
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Affiliation(s)
- Anbo Ling
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Lizhi Zhang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Ren Xiang Tan
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Zhong-Quan Liu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
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79
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Visible-light-induced 1,2-alkylarylation of alkenes with a-C(sp3)–H bonds of acetonitriles involving neophyl rearrangement under transition-metal-free conditions. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.11.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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80
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Gandeepan P, Müller T, Zell D, Cera G, Warratz S, Ackermann L. 3d Transition Metals for C-H Activation. Chem Rev 2018; 119:2192-2452. [PMID: 30480438 DOI: 10.1021/acs.chemrev.8b00507] [Citation(s) in RCA: 1425] [Impact Index Per Article: 237.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
C-H activation has surfaced as an increasingly powerful tool for molecular sciences, with notable applications to material sciences, crop protection, drug discovery, and pharmaceutical industries, among others. Despite major advances, the vast majority of these C-H functionalizations required precious 4d or 5d transition metal catalysts. Given the cost-effective and sustainable nature of earth-abundant first row transition metals, the development of less toxic, inexpensive 3d metal catalysts for C-H activation has gained considerable recent momentum as a significantly more environmentally-benign and economically-attractive alternative. Herein, we provide a comprehensive overview on first row transition metal catalysts for C-H activation until summer 2018.
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Affiliation(s)
- Parthasarathy Gandeepan
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Thomas Müller
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Daniel Zell
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Gianpiero Cera
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Svenja Warratz
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
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81
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Yang Q, Lou M, Yin Z, Deng Z, Ding Q, Peng Y. Direct C-4 alkylation of quinazoline N-oxides with ethers via an oxidative cross-coupling reaction under metal-free conditions. Org Biomol Chem 2018; 16:8724-8731. [PMID: 30209478 DOI: 10.1039/c8ob01429a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A novel and efficient protocol for the direct C-4 alkylation of quinazoline-3-oxides via radical oxidative coupling between quinazoline 3-oxides and ethers in the presence of TBHP was developed. The reaction proceeded smoothly under metal-free conditions, which provided quinazoline-containing heterocyclic molecules in moderate to good yields.
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Affiliation(s)
- Qin Yang
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, and Jiangxi Province's Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang, Jiangxi 330022, China.
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82
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Piazzolla F, Siciliano C, Minuti L, Temperini A. Exploration of synthetic strategies for the stereoselective preparation of novel tetrahydrofuran-containing biaryls: A high-pressure promoted Diels-Alder approach. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.09.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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83
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Mishra AA, Subhedar D, Bhanage BM. Nickel, Cobalt and Palladium Catalysed C−H Functionalization of Un‐Activated C(sp
3
)−H Bond. CHEM REC 2018; 19:1829-1857. [DOI: 10.1002/tcr.201800093] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 09/02/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Ashish A. Mishra
- Department of ChemistryInstitute of Chemical Technology, Matunga Nathalal Parekh Marg Mumbai Maharashtra
| | - Dnyaneshwar Subhedar
- Department of ChemistryInstitute of Chemical Technology, Matunga Nathalal Parekh Marg Mumbai Maharashtra
| | - Bhalchandra M. Bhanage
- Department of ChemistryInstitute of Chemical Technology, Matunga Nathalal Parekh Marg Mumbai Maharashtra
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84
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Shen Y, Gu Y, Martin R. sp 3 C-H Arylation and Alkylation Enabled by the Synergy of Triplet Excited Ketones and Nickel Catalysts. J Am Chem Soc 2018; 140:12200-12209. [PMID: 30184423 DOI: 10.1021/jacs.8b07405] [Citation(s) in RCA: 229] [Impact Index Per Article: 38.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Triplet ketone sensitizers are of central importance within the realm of photochemical transformations. Although the radical-type character of triplet excited states of diaryl ketones suggests the viability for triggering hydrogen-atom transfer (HAT) and single-electron transfer (SET) processes, among others, their use as multifaceted catalysts in C-C bond-formation via sp3 C-H functionalization of alkane feedstocks still remains rather unexplored. Herein, we unlock a modular photochemical platform for forging C( sp3)-C( sp2) and C( sp3)-C( sp3) linkages from abundant alkane sp3 C-H bonds as functional handles using the synergy between nickel catalysts and simple, cheap and modular diaryl ketones. This method is distinguished by its wide scope that is obtained from cheap catalysts and starting precursors, thus complementing existing inner-sphere C-H functionalization protocols or recent photoredox scenarios based on iridium polypyridyl complexes. Additionally, such a platform provides a new strategy for streamlining the synthesis of complex molecules with high levels of predictable site-selectivity and preparative utility. Mechanistic experiments suggest that sp3 C-H abstraction occurs via HAT from the ketone triplet excited state. We believe this study will contribute to a more systematic utilization of triplet excited ketones as catalysts in metallaphotoredox scenarios.
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Affiliation(s)
- Yangyang Shen
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , c/Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Yiting Gu
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , c/Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,ICREA , Passeig Lluïs Companys 23 , 08010 Barcelona , Spain
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85
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Liang X, Wu C, Zheng Z, Walsh PJ. Nickel-Catalyzed Oxidative Coupling Reaction of Phenyl Benzyl Sulfoxides. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00476] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xiaoxia Liang
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, PR China
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Chen Wu
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Zhipeng Zheng
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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86
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Ge L, Jian W, Zhou H, Chen S, Ye C, Yu F, Qian B, Li Y, Bao H. Iron-Catalyzed Vinylic C-H Alkylation with Alkyl Peroxides. Chem Asian J 2018; 13:2522-2528. [PMID: 29767475 DOI: 10.1002/asia.201800534] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/14/2018] [Indexed: 01/19/2023]
Abstract
A variety of alkyl peresters and alkyl diacyl peroxides, which are readily accessible from carboxylic acids, are utilized as general primary, secondary, and tertiary alkylating reagents for iron-catalyzed vinylic C-H alkylation of vinyl arenes, dienes, and 1,3-enynes. This transformation affords olefinic products in up to 98 % yield with high E/Z values. A broad range of functionalities, including carboxyl, boronic acid, methoxy, ester, amino, and halides, are tolerated. This protocol provides a facile approach to some olefins that are difficult to access, and hence, offers an alternative to existing systems. The synthetic utility of this method is demonstrated by late-stage functionalization of selected natural-product derivatives.
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Affiliation(s)
- Liang Ge
- 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, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P.R. China
| | - Wujun Jian
- 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, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P.R. China
| | - Huan Zhou
- 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, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P.R. China
| | - Shaowei Chen
- 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, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P.R. China
| | - Changqing Ye
- 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, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P.R. China
| | - Fei Yu
- 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, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P.R. China
| | - Bo Qian
- 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, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P.R. China
| | - Yajun Li
- 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, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P.R. China
| | - Hongli Bao
- 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, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P.R. China
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87
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Marzo L, Pagire SK, Reiser O, König B. Visible-Light Photocatalysis: Does It Make a Difference in Organic Synthesis? Angew Chem Int Ed Engl 2018; 57:10034-10072. [PMID: 29457971 DOI: 10.1002/anie.201709766] [Citation(s) in RCA: 1143] [Impact Index Per Article: 190.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 01/12/2018] [Indexed: 12/12/2022]
Abstract
Visible-light photocatalysis has evolved over the last decade into a widely used method in organic synthesis. Photocatalytic variants have been reported for many important transformations, such as cross-coupling reactions, α-amino functionalizations, cycloadditions, ATRA reactions, or fluorinations. To help chemists select photocatalytic methods for their synthesis, we compare in this Review classical and photocatalytic procedures for selected classes of reactions and highlight their advantages and limitations. In many cases, the photocatalytic reactions proceed under milder reaction conditions, typically at room temperature, and stoichiometric reagents are replaced by simple oxidants or reductants, such as air, oxygen, or amines. Does visible-light photocatalysis make a difference in organic synthesis? The prospect of shuttling electrons back and forth to substrates and intermediates or to selectively transfer energy through a visible-light-absorbing photocatalyst holds the promise to improve current procedures in radical chemistry and to open up new avenues by accessing reactive species hitherto unknown, especially by merging photocatalysis with organo- or metal catalysis.
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Affiliation(s)
- Leyre Marzo
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Santosh K Pagire
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Oliver Reiser
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Burkhard König
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
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88
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Marzo L, Pagire SK, Reiser O, König B. Photokatalyse mit sichtbarem Licht: Welche Bedeutung hat sie für die organische Synthese? Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201709766] [Citation(s) in RCA: 306] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Leyre Marzo
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Santosh K. Pagire
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Oliver Reiser
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Burkhard König
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
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89
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Ali S, Milanezi H, Alves TMF, Tormena CF, Ferreira MAB. Cobalt-Catalyzed Stereoselective Synthesis of 2,5- trans-THF Nitrile Derivatives as a Platform for Diversification: Development and Mechanistic Studies. J Org Chem 2018; 83:7694-7713. [PMID: 29878776 DOI: 10.1021/acs.joc.8b00575] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A straightforward protocol integrating a sustainable approach for the synthesis of new 2,5- trans-THF nitrile derivatives enabling an easy diversification of its side chain scaffolds is described. The reaction tolerated different aromatic and alkyl substituents, affording the corresponding 2,5- trans-THFs in high diastereoselectivity. A detailed mechanistic study using DFT calculation reveals details of the ligand-exchange step, suggesting an inner-sphere syn attack to form the 2,5- trans stereochemistry as the most likely pathway, excluding the previous cation radical intermediate. The formation of a Co-C intermediate is suggested on the basis of the homolytic cleavage to give the previously proposed free carbon radical intermediate.
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Affiliation(s)
- Sajjad Ali
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem), Department of Chemistry , Federal University of São Carlos - UFSCar , São Carlos, São Paulo 13565-905 , Brazil
| | - Henrique Milanezi
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem), Department of Chemistry , Federal University of São Carlos - UFSCar , São Carlos, São Paulo 13565-905 , Brazil
| | - Tânia M F Alves
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem), Department of Chemistry , Federal University of São Carlos - UFSCar , São Carlos, São Paulo 13565-905 , Brazil
| | | | - Marco A B Ferreira
- Centre of Excellence for Research in Sustainable Chemistry (CERSusChem), Department of Chemistry , Federal University of São Carlos - UFSCar , São Carlos, São Paulo 13565-905 , Brazil
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90
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Zhao Q, Ji XS, Gao YY, Hao WJ, Zhang KY, Tu SJ, Jiang B. Merging “Anti-Baldwin” 3-Exo-Dig Cyclization with 1,2-Alkynyl Migration for Radical Alkylalkynylation of Unactivated Olefins. Org Lett 2018; 20:3596-3600. [DOI: 10.1021/acs.orglett.8b01382] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qi Zhao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Xiao-Shuang Ji
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Yi-Yun Gao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Ke-Ying Zhang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P. R. China
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91
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Liu Y, Yi H, Lei A. Oxidation-Induced C-H Functionalization: A Formal Way for C-H Activation. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201800106] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yichang Liu
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences; Wuhan University; Wuhan Hubei 430072 China
| | - Hong Yi
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences; Wuhan University; Wuhan Hubei 430072 China
| | - Aiwen Lei
- The Institute for Advanced Studies (IAS), College of Chemistry and Molecular Sciences; Wuhan University; Wuhan Hubei 430072 China
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92
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Li S, Wang B, Dong G, Li C, Liu H. Cobalt-catalyzed C(sp 3)-H/C(sp 2)-H oxidative coupling between alkanes and benzamides. RSC Adv 2018; 8:13454-13458. [PMID: 35542514 PMCID: PMC9079668 DOI: 10.1039/c8ra01377b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 03/29/2018] [Indexed: 11/21/2022] Open
Abstract
A direct cobalt-catalyzed oxidative coupling between C(sp2)-H in unactivated benzamides and C(sp3)-H in simple alkanes, ethers and toluene derivatives was explored. This protocol achieves direct C-C formation without using alkyl or aryl halide surrogates and exhibits high practicality with ample substrate scope. The method provides a new way to construct linear and five- or six-membered ring moieties in bioactive molecules.
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Affiliation(s)
- Shuangjie Li
- School of Pharmacy, China Pharmaceutical University Jiangsu Nanjing 210009 China
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China
| | - Bao Wang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China
- School of Life Science and Technology, ShanghaiTech University 100 Haike Road Shanghai 201210 China
| | - Guangyu Dong
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China
- School of Life Science and Technology, ShanghaiTech University 100 Haike Road Shanghai 201210 China
| | - Chunpu Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China
| | - Hong Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China
- Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zu Chong Zhi Road Shanghai 201203 China
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93
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An Z, Zhao L, Wu M, Ni J, Qi Z, Yu G, Yan R. FeCl 3-Catalyzed synthesis of pyrrolo[1,2-a]quinoxaline derivatives from 1-(2-aminophenyl)pyrroles through annulation and cleavage of cyclic ethers. Chem Commun (Camb) 2018; 53:11572-11575. [PMID: 28990598 DOI: 10.1039/c7cc07089f] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A straightforward Fe-catalyzed method for the synthesis of pyrrolo[1,2-a]quinoxalines from 1-(2-aminophenyl)pyrroles and cyclic ethers, which includes functionalization of C(sp3)-H bonds and the construction of C-C and C-N bonds, has been developed. The features of this reaction are Fe catalysis, low-cost and readily accessible starting materials. Moreover, this procedure exhibits good functional group tolerance and a series of pyrrolo[1,2-a]quinoxaline derivatives are obtained in moderate to good yields.
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Affiliation(s)
- Zhenyu An
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry, Lanzhou University, Lanzhou, Gansu, China.
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94
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Ghosh T, Maity P, Ranu BC. Cobalt-Catalyzed Remote C-4 Functionalization of 8-Aminoquinoline Amides with Ethers via C–H Activation under Visible-Light Irradiation. Access to α-Heteroarylated Ether Derivatives. Org Lett 2018; 20:1011-1014. [DOI: 10.1021/acs.orglett.7b03955] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tubai Ghosh
- Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Pintu Maity
- Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Brindaban C. Ranu
- Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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95
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Wang ZY, Wan JH, Wang GY, Jin RX, Lan Q, Wang XS. Nickel-Catalyzed Heck-Type Monofluoroacetation of Styrenes for Facile Synthesis of Allylic Fluorides. Chem Asian J 2018; 13:261-265. [DOI: 10.1002/asia.201701655] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 12/16/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Zhen-Yu Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Jia-Hao Wan
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Gao-Yin Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Ruo-Xing Jin
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Quan Lan
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
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96
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Yuan Z, Zhu C, Ma Z, Xia C. Copper-catalyzed amination of an α-C(sp3)–H bond in inactivated ethers to synthesize α-aminonitriles. Chem Commun (Camb) 2018; 54:11033-11036. [DOI: 10.1039/c8cc06111d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A copper-catalyzed functionalization of inert cyclic ethers was developed to provide α-aminonitriles via a cascade oxidation/amination/ring-opening/cyanation reaction.
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Affiliation(s)
- Zaifeng Yuan
- Key Laboratory of Medicinal Chemistry for Natural Resources (Ministry of Education and Yunnan Province)
- School of Chemical Science and Technology
- Library of Yunnan University
- Yunnan University
- Kunming 650091
| | - Chunyu Zhu
- Key Laboratory of Medicinal Chemistry for Natural Resources (Ministry of Education and Yunnan Province)
- School of Chemical Science and Technology
- Library of Yunnan University
- Yunnan University
- Kunming 650091
| | - Zhixian Ma
- Key Laboratory of Medicinal Chemistry for Natural Resources (Ministry of Education and Yunnan Province)
- School of Chemical Science and Technology
- Library of Yunnan University
- Yunnan University
- Kunming 650091
| | - Chengfeng Xia
- Key Laboratory of Medicinal Chemistry for Natural Resources (Ministry of Education and Yunnan Province)
- School of Chemical Science and Technology
- Library of Yunnan University
- Yunnan University
- Kunming 650091
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97
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Yuan J, Fu J, Yin J, Dong Z, Xiao Y, Mao P, Qu L. Transition-metal-free direct C-3 alkylation of quinoxalin-2(1H)-ones with ethers. Org Chem Front 2018. [DOI: 10.1039/c8qo00731d] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An efficient protocol for the synthesis of 3-alkyl quinoxalin-2(1H)-ones has been developed via the transition-metal-free cross-coupling reaction of quinoxalin-2(1H)-ones with ethers with moderate to good yields under relatively mild conditions.
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Affiliation(s)
- Jinwei Yuan
- School of Chemistry & Chemical Engineering
- Henan University of Technology; Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Junhao Fu
- School of Chemistry & Chemical Engineering
- Henan University of Technology; Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Jihong Yin
- School of Chemistry & Chemical Engineering
- Henan University of Technology; Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Zhenhua Dong
- School of Chemistry & Chemical Engineering
- Henan University of Technology; Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Yongmei Xiao
- School of Chemistry & Chemical Engineering
- Henan University of Technology; Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Pu Mao
- School of Chemistry & Chemical Engineering
- Henan University of Technology; Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
| | - Lingbo Qu
- School of Chemistry & Chemical Engineering
- Henan University of Technology; Academician Workstation for Natural Medicinal Chemistry of Henan Province
- Zhengzhou 450001
- P. R. China
- College of Chemistry and Molecular Engineering
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98
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Chen W, Zhang Y, Li P, Wang L. tert-Butyl peroxybenzoate mediated formation of 3-alkylated quinolines from N-propargylamines via a cascade radical addition/cyclization reaction. Org Chem Front 2018. [DOI: 10.1039/c7qo01052d] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A novel method for constructing 3-alkylated quinolines was developed via tert-butyl peroxybenzoate mediated cycloaddition between N-propargyl aromatic amines and ethers.
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Affiliation(s)
- Wei Chen
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
| | - Yicheng Zhang
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
- School of Environmental and Chemical Engineering
| | - Pinhua Li
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
| | - Lei Wang
- Department of Chemistry
- Huaibei Normal University
- Huaibei
- P. R. China
- State Key Laboratory of Organometallic Chemistry
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99
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Tan M, Li K, Yin J, You J. Manganese/cobalt-catalyzed oxidative C(sp3)–H/C(sp3)–H coupling: a route to α-tertiary β-arylethylamines. Chem Commun (Camb) 2018; 54:1221-1224. [DOI: 10.1039/c7cc08512e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
An oxidative coupling reaction of an α-C(sp3)–H bond of amine with a benzylic C(sp3)–H bond provides diverse collections of α-tertiary β-arylethylamines.
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Affiliation(s)
- Meiling Tan
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- P. R. China
| | - Kaizhi Li
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- P. R. China
| | - Jiangliang Yin
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- P. R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University
- Chengdu 610064
- P. R. China
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100
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Electrochemical Oxidative Cross-coupling with Hydrogen Evolution: A Green and Sustainable Way for Bond Formation. Chem 2018. [DOI: 10.1016/j.chempr.2017.10.001] [Citation(s) in RCA: 515] [Impact Index Per Article: 85.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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