151
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Li F, Pei C, Koenigs RM. Photocatalytic gem-Difluoroolefination Reactions by a Formal C-C Coupling/Defluorination Reaction with Diazoacetates. Angew Chem Int Ed Engl 2021; 61:e202111892. [PMID: 34716734 PMCID: PMC9300101 DOI: 10.1002/anie.202111892] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Indexed: 12/23/2022]
Abstract
The photolysis of diazoalkanes to conduct singlet carbene transfer reactions of colored diazoalkanes has recently attracted significant interest in organic synthesis. Herein, we describe a photocatalytic approach that allows the access of triplet carbene intermediates via energy transfer to conduct highly efficient gem‐difluoroolefination reactions with α‐trifluoromethyl styrenes. The use of a tertiary amines proved pivotal to unlock this unusual reaction pathway and to prevent undesired cyclopropanation pathways. The amine further facilitates the ultimate abstraction of fluoride to yield gem‐difluoroolefins (43 examples, up to 88 % yield), which is supported by experimental and theoretical mechanistic studies. We explored this synthesis method with a broad substrate scope, ranging from simple olefins and heterocyclic olefins towards the decoration of pharmaceutically relevant building blocks.
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Affiliation(s)
- Fang Li
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074, Aachen, Germany
| | - Chao Pei
- 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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152
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More details on diazoolefins. Nat Chem 2021; 13:1030-1032. [PMID: 34707234 DOI: 10.1038/s41557-021-00811-1] [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]
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153
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Varava P, Dong Z, Scopelliti R, Fadaei-Tirani F, Severin K. Isolation and characterization of diazoolefins. Nat Chem 2021; 13:1055-1060. [PMID: 34621076 DOI: 10.1038/s41557-021-00790-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 08/17/2021] [Indexed: 11/09/2022]
Abstract
Diazoolefins tend to be highly reactive compounds that rapidly lose dinitrogen. So far, most experimental evidence for diazoolefins is indirect, via trapping experiments. Here we show that diazoolefins are observed to form in reactions of N-heterocyclic olefins with nitrous oxide. The products benefit from resonance stabilization, which enables isolation on a preparative scale, and comprehensive characterization, which includes crystallographic analyses. N-heterocyclic diazoolefins show a strong ylidic character, with a high charge density at the carbon atom next to the diazo group. Despite the presence of terminal N2 groups, N-heterocyclic diazoolefins display a good thermal stability, which surpasses that observed for most diazoalkanes. N-heterocyclic diazoolefins can bind transition and main group metal complexes without the liberation of dinitrogen, and spectroscopic data show that they are strong electron donors. They can also undergo reactions that involve the N2 group, as evidenced by cycloaddition reactions.
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Affiliation(s)
- Paul Varava
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Zhaowen Dong
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Farzaneh Fadaei-Tirani
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Kay Severin
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
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154
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Li F, Pei C, Quaranta C, Koenigs RM. 1,3‐Difunctionalization of Imino‐Carbenes via Rhodium‐Catalyzed Reactions of Triazoles with Acyl Selenides. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Fang Li
- RWTH Aachen University Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
| | - Chao Pei
- RWTH Aachen University Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
| | - Calogero Quaranta
- 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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155
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Li Q, Cai BG, Li L, Xuan J. Oxime Ether Synthesis through O-H Functionalization of Oximes with Diazo Esters under Blue LED Irradiation. Org Lett 2021; 23:6951-6955. [PMID: 34382794 DOI: 10.1021/acs.orglett.1c02555] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A green and sustainable oxime ether formation method via the visible-light-promoted O-H functionalization of oximes with diazo esters is described. The reaction occurs under very mild conditions (catalyst- and additive-free) with a high yield and a high functional group tolerance. When the reaction was performed with a cyclic ether as the solvent (e.g., THF, 1,4-dioxane, tetrahydropyran, ect.), an interesting photochemical three-component reaction product was obtained in good yields.
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Affiliation(s)
- Qian Li
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Bao-Gui Cai
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Lei Li
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China.,Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Ministry of Education, Anhui University, Hefei, 230601, People's Republic of China.,Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
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156
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Roy S, Kumar G, Chatterjee I. Photoinduced Diverse Reactivity of Diazo Compounds with Nitrosoarenes. Org Lett 2021; 23:6709-6713. [PMID: 34474577 DOI: 10.1021/acs.orglett.1c02279] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A diverse reactivity of diazo compounds with nitrosoarene in an oxygen-transfer process and a formal [2 + 2] cycloaddition is reported. Nitosoarene has been exploited as a mild oxygen source to oxidize an in situ generated carbene intermediate under visible-light irradiation. UV-light-mediated in situ generated ketenes react with nitosoarenes to deliver oxazetidine derivatives. These operationally simple processes exemplify a transition-metal-free and catalyst-free protocol to give structurally diverse α-ketoesters or oxazetidines.
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Affiliation(s)
- Sourav Roy
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Gourav Kumar
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
| | - Indranil Chatterjee
- Department of Chemistry, Indian Institute of Technology Ropar, Nangal Road, Rupnagar, Punjab 140001, India
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157
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Sar S, Guha S, Prabakar T, Maiti D, Sen S. Blue Light-Emitting Diode-Mediated In Situ Generation of Pyridinium and Isoquinolinium Ylides from Aryl Diazoesters: Their Application in the Synthesis of Diverse Dihydroindolizine. J Org Chem 2021; 86:11736-11747. [PMID: 34369766 DOI: 10.1021/acs.joc.1c01209] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Blue light-emitting diode-mediated environmentally sustainable three component reactions among pyridine/isoquinoline 1/2, aryl diazoesters 3, and acrylic ester/3-alkenyl oxindoles 5/6 provide various dihydroindolizines 7 to 9 in excellent yield. The principle of the strategy is photolytic generation of nitrogen ylides from N-heteroarenes and aryl diazoesters and their subsequent [3 + 2] cycloaddition reaction with dipolarophiles. Detailed mechanistic analysis of the transformation through control experiments establishes this strategy as the foundation for the photolytic multicomponent reaction.
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Affiliation(s)
- Saibal Sar
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University Dadri, Chithera, Gautam Buddha Nagar, Uttar Pradesh 201314, India
| | - Souvik Guha
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University Dadri, Chithera, Gautam Buddha Nagar, Uttar Pradesh 201314, India
| | - Tejas Prabakar
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University Dadri, Chithera, Gautam Buddha Nagar, Uttar Pradesh 201314, India
| | - Debajit Maiti
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University Dadri, Chithera, Gautam Buddha Nagar, Uttar Pradesh 201314, India
| | - Subhabrata Sen
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University Dadri, Chithera, Gautam Buddha Nagar, Uttar Pradesh 201314, India
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158
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He F, Empel C, Koenigs RM. Silver-Catalyzed N-H Functionalization of Aryl/Aryl Diazoalkanes with Anilines. Org Lett 2021; 23:6719-6723. [PMID: 34427449 DOI: 10.1021/acs.orglett.1c02289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we report on the N-H functionalization reaction of primary and secondary anilines with diaryldiazoalkanes using simple AgPF6 as catalyst. We demonstrated broad applicability in the reaction of diaryldiazoalkanes with different anilines (31 examples, up to 97% yield). Furthermore, we propose a possible reaction mechanism for the N-H functionalization.
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Affiliation(s)
- Feifei He
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Claire Empel
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Rene M Koenigs
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
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159
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Yuan H, Hong K, Liu X, Qian Y, Xu X, Hu W. Enantioselective assembly of 3,3-disubstituted succinimides via three-component reaction of vinyl diazosuccinimides with alcohols and imines. Chem Commun (Camb) 2021; 57:8043-8046. [PMID: 34291251 DOI: 10.1039/d1cc02876f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An enantioselective three-component reaction of vinyl diazosuccinimdes with alcohols and imines has been realized by a cooperative catalysis of Rh2(OAc)4 and a chiral phosphoric acid, leading to chiral 3,3-disubstituted succinimides in good to high yields with high to excellent enantioselectivity. The generated product with an alkenyl species could be converted to the chiral tricyclic structure under mild conditions.
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Affiliation(s)
- Haoxuan Yuan
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Kemiao Hong
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Xiangrong Liu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Yu Qian
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Xinfang Xu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Wenhao Hu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
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160
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Abstract
Herein, we report on the tris(pentafluorophenyl)borane-catalyzed reaction of carbazole heterocycles with aryldiazoacetates. We could demonstrate that selective N-H functionalization occurs in the case of an unprotected carbazole, other N-heterocycles, and secondary amines in good yields. In contract, the protected carbazole undergoes C-H functionalization at the C-3 position in a good yield. The application of both approaches was studied in 41 examples with up to a 97% yield.
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Affiliation(s)
- Feifei He
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Rene M Koenigs
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
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161
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Ma N, Guo L, Qi D, Gao F, Yang C, Xia W. Visible-Light-Induced Multicomponent Synthesis of γ-Amino Esters with Diazo Compounds. Org Lett 2021; 23:6278-6282. [PMID: 34351163 DOI: 10.1021/acs.orglett.1c02071] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A visible-light-induced multicomponent reaction of ethyl diazoacetate, diarylamines, and styrene-type alkenes is described. This novel 1,2-difunctionalization of alkenes can be readily achieved under a simple operation and mild conditions, affording γ-amino esters as major products. The reaction proceeds through the generation of carbon-centered radicals from diazo compounds by a visible-light-promoted proton-coupled electron transfer (PCET) process. The carbon radicals then add to diverse alkenes, delivering new carbon radical species, and the final products are formed with N-centered radicals via a radical-radical coupling.
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Affiliation(s)
- Na Ma
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Lin Guo
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Dan Qi
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Fei Gao
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Chao Yang
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Wujiong Xia
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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162
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Visible light and base promoted O-H insertion/cyclization of para-quinone methides with aryl diazoacetates: An approach to 2,3-dihydrobenzofuran derivatives. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.03.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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163
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Song H, Lee E. Theoretical Assessment of Dinitrogen Fixation on Carbon Atom. Chem Asian J 2021; 16:2421-2425. [PMID: 34250740 DOI: 10.1002/asia.202100567] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/26/2021] [Indexed: 11/07/2022]
Abstract
Dinitrogen activation in non-metallic systems has received considerable attention in recent years. Herein, we report the theoretical feasibility of N2 fixation using aminocarbenes (L) or their anionic derivatives. The molecular descriptors of L and anionic L- , which affect the interaction of L and anionic L- with N2 , were identified through multiple linear regression analysis. Additionally, the electron flow during C-N bond formation was confirmed by performing intrinsic reaction coordination calculations with intrinsic bond orbital analysis for the reaction of anionic L- with N2 .
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Affiliation(s)
- Hayoung Song
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Eunsung Lee
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
- Graduate school of artificial intelligence, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
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164
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Stefkova K, Heard MJ, Dasgupta A, Melen RL. Borane catalysed cyclopropenation of arylacetylenes. Chem Commun (Camb) 2021; 57:6736-6739. [PMID: 34132279 DOI: 10.1039/d1cc01856f] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Triarylboranes have gained substantial attention as catalysts for C-C bond forming reactions due to their remarkable catalytic activities. Herein, we report B(C6F5)3 catalysed cyclopropenation of a wide variety of arylacetylenes using donor-acceptor diazoesters. A mild reaction protocol has been developed for the synthesis of functionalised cyclopropenes (33 examples) in good to excellent yields.
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Affiliation(s)
- Katarina Stefkova
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Cymru/Wales, UK.
| | - Matthew J Heard
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Cymru/Wales, UK.
| | - Ayan Dasgupta
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Cymru/Wales, UK.
| | - Rebecca L Melen
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, Cymru/Wales, UK.
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165
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Cai BG, Li L, Xu GY, Xiao WJ, Xuan J. Visible-light-promoted nitrone synthesis from nitrosoarenes under catalyst- and additive-free conditions. Photochem Photobiol Sci 2021; 20:823-829. [PMID: 34115366 DOI: 10.1007/s43630-021-00062-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 05/27/2021] [Indexed: 11/27/2022]
Abstract
A green and sustainable nitrone formation reaction via visible-light-promoted reaction of aryl diazoacetates with nitrosoarenes is described. This protocol exhibits good functional group tolerance and broad substrate scope for both aryl diazoacetates with nitrosoarenes. Comparing the reported methods for the synthesis of nitrones from nitrosoarenes, the reaction described herein occurs under sole visible-light irradiation without the need of any catalysts and additives.
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Affiliation(s)
- Bao-Gui Cai
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui, 230601, People's Republic of China
| | - Lin Li
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui, 230601, People's Republic of China
| | - Guo-Yong Xu
- Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, People's Republic of China.
| | - Wen-Jing Xiao
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei, 430079, People's Republic of China.
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui, 230601, People's Republic of China.
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei, 230601, People's Republic of China.
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166
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Sunlight activated film forming adhesive polymers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 127:112240. [PMID: 34225880 DOI: 10.1016/j.msec.2021.112240] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/25/2021] [Accepted: 06/02/2021] [Indexed: 02/06/2023]
Abstract
Stimuli-sensitive biomaterials that are activated by light are in need of formulations that are stable under indoor lighting yet can be activated under direct sunlight. Carbene-based bioadhesives are a new generation of film-forming polymers that are stable under indoor lighting yet are rapidly activated with low-energy UVA light, but have never been evaluated under sunlight exposure. Previous investigations have evolved two flexible carbene-based platforms, where aryl-diazirine is grafted on to polyamidoamine dendrimers (PAMAM-NH2; generation-5) or hydrophobic liquid polycaprolactone tetrol to yield G5-Dzx and CaproGlu, respectively. For the first time the activation of G5-Dzx and CaproGlu is investigated by natural sunlight with intensities up to 10 mW·cm-2. Structure-property relationships of bioadhesion are investigated by: (1) joules dose of sunlight; (2) bioadhesive polymer structure; and (3) optical concentrators of magnifying glass and Fresnel lens. Using only natural sunlight, adhesion strength could be tuned from 20 to 150 kPa with crosslinking achieved in under 1 min. The results show that carbene-based polymers are a class of stimuli-sensitive biomaterials that are stable to indoor lighting, yet can be rapidly activated under direct sunlight, which may be useful for topical film forming polymers or as active ingredients in sunscreen formulations.
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167
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Jana S, Pei C, Empel C, Koenigs RM. Photochemical Carbene Transfer Reactions of Aryl/Aryl Diazoalkanes-Experiment and Theory*. Angew Chem Int Ed Engl 2021; 60:13271-13279. [PMID: 33687781 PMCID: PMC8252492 DOI: 10.1002/anie.202100299] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 03/08/2021] [Indexed: 01/20/2023]
Abstract
Controlling the reactivity of carbene intermediates is a key parameter in the development of selective carbene transfer reactions and is usually achieved by metal complexes via singlet metal-carbene intermediates. In this combined experimental and computational studies, we show that the reactivity of free diaryl carbenes can be controlled by the electronic properties of the substituents without the need of external additives. The introduction of electron-donating and -withdrawing groups results in a significant perturbation of singlet triplet energy splitting of the diaryl carbene intermediate and of activation energies of consecutive carbene transfer reactions. This strategy now overcomes a long-standing paradigm in the reactivity of diaryl carbenes and allows the realization of highly chemoselective carbene transfer reactions with alkynes. We could show that free diaryl carbenes can be readily accessed via photolysis of the corresponding diazo compounds and that these carbenes can undergo highly chemoselective cyclopropenation, cascade, or C-H functionalization reactions. Experimental and theoretical mechanistic analyses confirm the participation of different carbene spin states and rationalize for the observed reactivity.
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Affiliation(s)
- Sripati Jana
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Chao Pei
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Claire Empel
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Rene M. Koenigs
- Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
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168
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Cheng X, Cai BG, Mao H, Lu J, Li L, Wang K, Xuan J. Divergent Synthesis of Aziridine and Imidazolidine Frameworks under Blue LED Irradiation. Org Lett 2021; 23:4109-4114. [PMID: 33989004 DOI: 10.1021/acs.orglett.1c00979] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We develop a visible light-promoted divergent cycloaddition of α-diazo esters with hexahydro-1,3,5-triazines, leading to a series of aziridine and imidazolidine frameworks in average good yield, by simply changing the reaction media used. It is noteworthy that the reaction occurs under sole visible light irradiation without the need for exogenous photoredox catalysts. More significantly, a reasonable reaction mechanism was proposed on the basis of the control experiments and density functional theory calculation results.
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Affiliation(s)
- Xiao Cheng
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Bao-Gui Cai
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Hui Mao
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Juan Lu
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Lei Li
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Kun Wang
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China.,Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, People's Republic of China.,Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang, China
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169
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Zhao S, Chen XX, Gao N, Qian M, Chen X. Visible-Light-Mediated Cyclopropanation Reactions of 3-Diazooxindoles with Arenes. J Org Chem 2021; 86:7131-7140. [PMID: 33871258 DOI: 10.1021/acs.joc.1c00418] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The cyclopropanation reaction of 3-diazooxindoles with arenes was first accomplished using visible-light irradiation. A series of spiro[norcaradiene-7,3'-indolin]-2'-ones were synthesized for the first time in high yields and with excellent diastereoselectivities. The synthetic usefulness of this catalyst-free photochemical methodology is illustrated by the further controllable rearrangement and epoxidation reactions.
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Affiliation(s)
- Shuai Zhao
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Xiang-Xiang Chen
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Nan Gao
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Mingcheng Qian
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Xin Chen
- School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
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170
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Sharma A, Dixit V, Kumar S, Jain N. Visible Light-Mediated In Situ Generation of δ,δ-Disubstituted p-Quinone Methides: Construction of a Sterically Congested Quaternary Stereocenter. Org Lett 2021; 23:3409-3414. [PMID: 33844558 DOI: 10.1021/acs.orglett.1c00862] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
An unprecedented visible light-assisted and zinc triflate-catalyzed construction of a diaryl-substituted quaternary stereocenter is reported. 2-(4-Hydroxyphenyl)-substituted aldehydes and ketones have been prepared in moderate to high yields via multicomponent reaction of acetylene, benzoquinone (BQ), and indole/aniline/thiol. The reaction is believed to proceed via in situ generation of p-quinone methide through a [2+2] cycloaddition-retroelectrocyclization of BQ and acetylene in blue light followed by a zinc triflate-catalyzed vinylogous Michael addition reaction with nucleophiles.
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Affiliation(s)
- Arun Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
| | - Vikas Dixit
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
| | - Sharvan Kumar
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
| | - Nidhi Jain
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016 New Delhi, India
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171
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Jana S, Pei C, Empel C, Koenigs RM. Photochemische Carbentransferreaktionen von Aryl/Aryldiazoalkanen – Experiment und Theorie**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100299] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Sripati Jana
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Chao Pei
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Claire Empel
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
| | - Rene M. Koenigs
- Institut für Organische Chemie RWTH Aachen University Landoltweg 1 52074 Aachen Deutschland
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172
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Capurro P, Lambruschini C, Lova P, Moni L, Basso A. Into the Blue: Ketene Multicomponent Reactions under Visible Light. J Org Chem 2021; 86:5845-5851. [PMID: 33822607 PMCID: PMC8154565 DOI: 10.1021/acs.joc.1c00278] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
![]()
For the first time,
a detailed study on the photophysical properties
of variously substituted diazoketones and on their photoreactivity
under blue LED irradiation was carried out. Despite very limited absorbance
in the visible region, we have demonstrated that, independently from
their structure, α-diazoketones all undergo a very efficient
Wolff rearrangement. Contrarily to the same UV-mediated reaction,
where photons can give rise to side processes, in this case, almost
all absorbed photons are selective and effective, and the quantum
yield is close to 100%. If the rearrangement is carried out in the
presence of isocyanides and carboxylic acids/silanols, the photoreactivity
is not affected, and the resulting ketenes can afford α-acyloxy-
and α-silyloxyacrylamides through two distinct multicomponent
reactions, performed both in batch and under continuous flow, with
improved selectivity and broader scope. These photoinduced multicomponent
reactions can be coupled with other visible-light-mediated transformations,
thus increasing the diversity of the molecules obtainable by this
approach.
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Affiliation(s)
- Pietro Capurro
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Chiara Lambruschini
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Paola Lova
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Lisa Moni
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
| | - Andrea Basso
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy
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173
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Guha S, Gadde S, Kumar N, Black DS, Sen S. Orthogonal Syntheses of γ-Carbolinone and Spiro[pyrrolidinone-3,3']indole Derivatives in One Pot through Reaction Telescoping. J Org Chem 2021; 86:5234-5244. [PMID: 33720725 DOI: 10.1021/acs.joc.1c00141] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Herein we report a series of telescoping methodologies for one pot synthesis of biologically relevant γ-carboline derivatives 6 and spiro[pyrrolidinone-3,3']indole 7. Initially the three consecutive steps of cyclopropanation, phthalimide deprotection, and Boc-deprotection have been congregated in a single reaction vessel to afford a ∼1:1 mixture of 6 and 7. Next, careful optimization of the reaction sequence and the conditions generated an orthogonal approach to access compounds 6 and 7 exclusively. Air oxidation of the γ-carbolinones 6 afforded aromatic γ-carbolines 8.
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Affiliation(s)
- Souvik Guha
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri, Chithera, Gautambudh Nagar, UP 201314, India
| | | | - Naresh Kumar
- School of Chemistry, UNSW Sydney, Sydney, NSW 2052, Australia
| | | | - Subhabrata Sen
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri, Chithera, Gautambudh Nagar, UP 201314, India
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174
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Priebbenow DL, Pilkington RL, Hearn KN, Polyzos A. Fluorinated Ketones as Trapping Reagents for Visible-Light-Induced Singlet Nucleophilic Carbenes. Org Lett 2021; 23:2783-2789. [PMID: 33733797 DOI: 10.1021/acs.orglett.1c00708] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Singlet nucleophilic carbenes (SNCs) containing only one heteroatom donor remain underutilized in chemical synthesis. We recently discovered that visible-light-induced SNC intermediates can be trapped by fluorinated ketones via 1,2-carbonyl addition to afford benzoin-type products. This discovery represents a rare example of nucleophilic carbenes reacting with ketones and delivers an efficient, user-friendly, and scalable process for accessing fluorinated tertiary alcohol derivatives driven only by light circumventing the use of exogenous catalysts or additives.
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Affiliation(s)
- Daniel L Priebbenow
- School of Chemistry, The University of Melbourne, Parkville 3010, Victoria, Australia
| | - Rowan L Pilkington
- School of Chemistry, The University of Melbourne, Parkville 3010, Victoria, Australia
| | - Kyle N Hearn
- STEM College, RMIT University, Melbourne 3000, Victoria, Australia
| | - Anastasios Polyzos
- School of Chemistry, The University of Melbourne, Parkville 3010, Victoria, Australia.,CSIRO Manufacturing, Research Way, Clayton 3168, Victoria, Australia
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175
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Dong J, Wang H, Mao S, Wang X, Zhou M, Li L. Visible Light‐Induced [3+2] Cyclization Reactions of Hydrazones with Hypervalent Iodine Diazo Reagents for the Synthesis of 1‐Amino‐1,2,3‐Triazoles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001436] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jun‐Ying Dong
- School of Chemistry and Materials Science Liaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
| | - He Wang
- School of Chemistry and Materials Science Liaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
| | - Shukuan Mao
- School of Chemistry and Materials Science Liaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
| | - Xin Wang
- School of Chemistry and Materials Science Liaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
| | - Ming‐Dong Zhou
- School of Chemistry and Materials Science Liaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
| | - Lei Li
- School of Chemistry and Materials Science Liaoning Shihua University Dandong Road 1 Fushun 113001 People's Republic of China
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176
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Wu D, Hao WJ, Rao Q, Lu Y, Tu SJ, Jiang B. Engaging 1,7-diynes in a photocatalytic Kharasch-type addition/1,5-(S N'')-substitution cascade toward β-gem-dihalovinyl carbonyls. Chem Commun (Camb) 2021; 57:1911-1914. [PMID: 33492317 DOI: 10.1039/d0cc07880h] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A new and general photocatalytic Kharasch-type addition/1,5-(SN'')-substitution cascade of 1,7-diynes with alkyl halides such as BrCCl3 and CBr4 was reported for the first time, and used to produce 65 hitherto unreported β-gem-dihalovinyl ketones/aldehydes with moderate to excellent yields in a highly regioselective manner. This reaction tolerates a wide scope of substrates, which offers a green and efficient entry to fabricate synthetically important β-gem-dihalovinyl carbonyl scaffolds. Notably, the late-stage application of these resulting β-gem-dihalovinyl carbonyls shows high and unique reactivity profiles and demonstrates the versatility of their derivatization.
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Affiliation(s)
- Dan Wu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Qian Rao
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Yi Lu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China.
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177
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Bahukhandi SB, Jana S, Koenigs RM. Brønsted acid‐catalyzed Reactions of Unprotected
N
‐heterocycles with Aryl/Aryl Diazoalkanes. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202000709] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Sripati Jana
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 D-52074 Aachen Germany
| | - Rene M. Koenigs
- Institute of Organic Chemistry RWTH Aachen University Landoltweg 1 D-52074 Aachen Germany
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178
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Maiti D, Das R, Sen S. Blue LED-Mediated N-H Insertion of Indoles into Aryldiazoesters at Room Temperature in Batch and Flow: Reaction Kinetics, Density Functional Theory, and Mechanistic Study. J Org Chem 2021; 86:2522-2533. [PMID: 33417455 DOI: 10.1021/acs.joc.0c02649] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Mild blue light-mediated N-H insertion of indole and its derivatives into aryldiazoesters has been reported in a batch and flow strategy to afford the corresponding N-alkylated product in moderate-to-excellent yield. Detailed high-performance liquid chromatography-based reaction kinetics measurements, control experiments, and kinetic isotope effect reveal that 3-substituted indoles with electron-withdrawing groups such as -CN and -CHO facilitated the product formation, whereas the electron-donating group retarded the process. The neutral indole performed in between them. Furthermore, Hammett plot and density functional theory-based transition-state optimization studies showed substantial correlation of the electronic nature of the substituents at the C3 position of indoles with the rate of the N-H insertion reaction. The strategy was utilized to synthesize a key intermediate for the natural product (-)-psychotrimine.
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Affiliation(s)
- Debajit Maiti
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri, Chithera, Gautam Budh Nagar, Greater Noida, Uttar Pradesh 201314, India
| | - Ranajit Das
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri, Chithera, Gautam Budh Nagar, Greater Noida, Uttar Pradesh 201314, India
| | - Subhabrata Sen
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri, Chithera, Gautam Budh Nagar, Greater Noida, Uttar Pradesh 201314, India
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179
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Day DP, Vargas JAM, Burtoloso ACB. Synthetic Routes Towards the Synthesis of Geminal α-Difunctionalized Ketones. CHEM REC 2021; 21:2837-2854. [PMID: 33533538 DOI: 10.1002/tcr.202000176] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/11/2021] [Indexed: 12/25/2022]
Abstract
The importance of gem-difunctionalized ketones is represented by their broad applications across chemical boundaries over recent years. The interesting reactivities that this class of compounds possess have made them ideal building blocks to access high-value organic molecules. Furthermore, the gem-difunctionalized ketone moiety has featured in numerous bioactive molecules. For these reasons, a plethora of routes to access such significant molecules have been developed by research groups worldwide - this account looks at delineating the synthesis of gem-difunctionalized ketones from carbonyl substrates, diazo compounds, sulfur ylides and alkynyl reactants.
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Affiliation(s)
- David P Day
- Instituto de Química de São Carlos, Universidade de São Paulo, CEP 13560-970, São Carlos, SP, Brasil
| | - Jorge A M Vargas
- Instituto de Química de São Carlos, Universidade de São Paulo, CEP 13560-970, São Carlos, SP, Brasil.,Facultad de Ciencias Básicas, Universidad Santiago de Cali, Calle 5 # 62-00 Campus Pampalinda, Santiago de Cali, Colombia
| | - Antonio C B Burtoloso
- Instituto de Química de São Carlos, Universidade de São Paulo, CEP 13560-970, São Carlos, SP, Brasil
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180
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Yang J, Wang G, Zhou H, Li Z, Ma B, Song M, Sun R, Huo C. Visible-light-promoted selective O-alkylation of 2-pyridones with α-aryldiazoacetates. Org Biomol Chem 2021; 19:394-398. [PMID: 33325960 DOI: 10.1039/d0ob02350g] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A visible-light-promoted O-H insertion reaction between 2-pyridones and α-aryldiazoacetates has been developed. Upon visible light irradiation, the reaction proceeds smoothly under mild and catalyst-free conditions. A wide scope of 2-pyridones and α-aryldiazoacetates are well tolerated, and various O-alkylated 2-pyridones are obtained with perfect selectivity and good functional group tolerance. A photoinduced radical process is probably responsible for the excellent selectivity.
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Affiliation(s)
- Jingya Yang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Ganggang Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Hongyan Zhou
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. and College of Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Zhifeng Li
- College of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741000, China
| | - Ben Ma
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Menghui Song
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Rongxia Sun
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
| | - Congde Huo
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
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181
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Empel C, Nguyen TV, Koenigs RM. Tropylium-Catalyzed O–H Insertion Reactions of Diazoalkanes with Carboxylic Acids. Org Lett 2021; 23:548-553. [DOI: 10.1021/acs.orglett.0c04069] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Claire Empel
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Thanh Vinh Nguyen
- School of Chemistry, University of New South Wales, Sydney 2052, NSW, Australia
| | - Rene M. Koenigs
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
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182
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Cai BG, Li Q, Zhang Q, Li L, Xuan J. Synthesis of trisubstituted hydroxylamines by a visible light-promoted multicomponent reaction. Org Chem Front 2021. [DOI: 10.1039/d1qo01102b] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A green and efficient route for the synthesis of trisubstituted hydroxylamines from β-keto ester, 2-nitrosopyridine and aryldiazoacetates has been reported. This multicomponent reaction occurred under mild conditions without catalysts or additives.
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Affiliation(s)
- Bao-Gui Cai
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Qian Li
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Qiong Zhang
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Lei Li
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei, 230601, People's Republic of China
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183
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Zhang Z, He Z, Xie Y, He T, Fu Y, Yu Y, Huang F. Brønsted acid-catalyzed homogeneous O–H and S–H insertion reactions under metal- and ligand-free conditions. Org Chem Front 2021. [DOI: 10.1039/d0qo01401j] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The economical and accessible CF3SO3H successfully catalyzed homogeneous O–H and S–H bond insertion reactions between hydroxyl compounds, thiols and diazo compounds under metal- and ligand-free conditions.
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Affiliation(s)
- Zhipeng Zhang
- School of Food Science and Pharmaceutical Engineering
- Nanjing Normal University
- Nanjing 210023
- P. R. China
- School of Biology and Biological Engineering
| | - Zhiqin He
- School of Food Science and Pharmaceutical Engineering
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Yuxing Xie
- School of Food Science and Pharmaceutical Engineering
- Nanjing Normal University
- Nanjing 210023
- P. R. China
| | - Tiantong He
- School of Pharmaceutical Sciences
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Yaofeng Fu
- School of Pharmaceutical Sciences
- Nanjing Tech University
- Nanjing 211816
- P. R. China
| | - Yang Yu
- School of Environmental Science and Engineering
- Nanjing Tech University
- Nanjing
- China
| | - Fei Huang
- School of Food Science and Pharmaceutical Engineering
- Nanjing Normal University
- Nanjing 210023
- P. R. China
- School of Pharmaceutical Sciences
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184
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Ji X, Zhang Z, Wang Y, Han Y, Peng H, Li F, Liu L. Catalyst-free synthesis of α,α-disubstituted carboxylic acid derivatives under ambient conditions via a Wolff rearrangement reaction. Org Chem Front 2021. [DOI: 10.1039/d1qo01265g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Herein, a hexafluoroisopropanol (HFIP)-promoted Wolff rearrangement reaction was developed, delivering various α,α-disubstituted carboxylic acid derivatives in good to excellent yields.
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Affiliation(s)
- Xin Ji
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Zhikun Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Yuzhu Wang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Yazhe Han
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Huiling Peng
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Fangzhu Li
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
| | - Lu Liu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai, 200241, P. R. China
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, East China Normal University, Shanghai 200062, P. R. China
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185
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Liu R, Liu Q, Meng H, Ding H, Hao J, Ji Z, Yue H, Wei W. Metal-free visible-light-induced aerobic oxidation of α-diazoesters leading to α-ketoesters in air. Org Chem Front 2021. [DOI: 10.1039/d0qo01587c] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A metal-free and visible-light-induced strategy has been established for the construction of α-ketoesters via aerobic oxidation of α-diazoesters with dioxygen in air at room temperature.
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Affiliation(s)
- Ruisheng Liu
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Qishun Liu
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Haoran Meng
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Hongyu Ding
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Jindong Hao
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
| | - Zhongyin Ji
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- 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
| | - Wei Wei
- School of Chemistry and Chemical Engineering
- Qufu Normal University
- Qufu 273165
- China
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186
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Geng F, Wang S, Song K, Hao W, Jiang B. Visible-Light-Driven Photocatalytic Kharasch-Type Addition of 1,6-Enynes. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202106014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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187
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Mei H, Liu J, Pajkert R, Wang L, Röschenthaler GV, Han J. Design of (β-diazo-α,α-difluoroethyl)phosphonates and their application as masked carbenes in visible light-promoted coupling reactions with sulfonic acids. Org Chem Front 2021. [DOI: 10.1039/d0qo01394c] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A new kind of (β-diazo-α,α-difluoroethyl)phosphonate was designed and used as masked carbenes in visible-light-promoted reactions with sulfonic acids.
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Affiliation(s)
- Haibo Mei
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Jiang Liu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Romana Pajkert
- Department of Life Sciences and Chemistry
- Jacobs University Bremen gGmbH
- 28759 Bremen
- Germany
| | - Li Wang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | | | - Jianlin Han
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
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188
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Liu J, Xu J, Pajkert R, Mei H, Röschenthaler GV, Han J. Esterification of Carboxylic Acids with (β-Diazo-α,α-difluoroethyl)phosphonates under Photochemical Conditions. ACTA CHIMICA SINICA 2021. [DOI: 10.6023/a21030096] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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189
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Cai B, Xuan J. Visible Light-Promoted Transformation of Diazo Compounds via the Formation of Free Carbene as Key Intermediate. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202109040] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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190
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Gu ZY, Han H, Li ZY, Ji SJ, Xia JB. Catalytic synthesis of functionalized amidines via cobalt-carbene radical coupling with isocyanides and amines. Org Chem Front 2021. [DOI: 10.1039/d1qo00063b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An atom- and step-economic multi-component cobalt-catalyzed synthesis of amidines has been reported by using amines, isocyanides, and diazo compounds as carbene sources.
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Affiliation(s)
- Zheng-Yang Gu
- College of Textiles and Clothing & Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province
- Yancheng Institute of Technology
- Yancheng
- China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
| | - Hui Han
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Center for Excellence in Molecular Synthesis
- Suzhou Research Institute of LICP
- Lanzhou Institute of Chemical Physics (LICP)
- University of Chinese Academy of Sciences
| | - Zi-Yin Li
- College of Textiles and Clothing & Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province
- Yancheng Institute of Technology
- Yancheng
- China
| | - Shun-Jun Ji
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Ji-Bao Xia
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- Center for Excellence in Molecular Synthesis
- Suzhou Research Institute of LICP
- Lanzhou Institute of Chemical Physics (LICP)
- University of Chinese Academy of Sciences
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191
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Song KX, Qin XY, Ma ZX, Geng FZ, Hao WJ, Tu SJ, Jiang B. Photocatalytic three-component annulation enabling stereoselective generation of (Z)-thiochromene 1,1-dioxides. Org Chem Front 2021. [DOI: 10.1039/d1qo00994j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A new photocatalytic three-component annulation of 2-alkynylaryldiazonium tetrafluoroborates with γ-hydroxyl terminal alkynes and sodium metabisulfite is reported and used to produce a series of (Z)-thiochromene 1,1-dioxides.
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Affiliation(s)
- Ke-Xian Song
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Xiao-Yan Qin
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Zi-Xuan Ma
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Fang-Zhou Geng
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Shu-Jiang Tu
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science, Jiangsu Normal University, Xuzhou, 221116, P. R. China
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192
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Bera SS, Bahukhandi SB, Empel C, Koenigs RM. Catalyst-controlled site-selective N-H and C3-arylation of carbazole via carbene transfer reactions. Chem Commun (Camb) 2021; 57:6193-6196. [PMID: 34048520 DOI: 10.1039/d1cc01863a] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A site-selective direct arylation reaction of carbazole and other N-heterocycles with diazo-naphthalen-2(1H)-ones has been developed. While Au(i)-NHC catalysts lead to selective C3-arylation, palladium acetate allows for selective N-H arylation, displaying complete site-selectivity each. To show the applicability of these arylation reactions, one-pot, two-fold diarylation reactions of carbazole were demonstrated.
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Affiliation(s)
- Sourav Sekhar Bera
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, Aachen D-52074, Germany.
| | | | - Claire Empel
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, Aachen D-52074, Germany.
| | - Rene M Koenigs
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, Aachen D-52074, Germany.
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193
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Ye C, Cai BG, Lu J, Cheng X, Li L, Pan ZW, Xuan J. Visible-Light-Promoted Polysubstituted Olefins Synthesis Involving Sulfur Ylides as Carbene Trapping Reagents. J Org Chem 2020; 86:1012-1022. [PMID: 33301327 DOI: 10.1021/acs.joc.0c02500] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A blue-light-emitting diode (LED) promoted coupling of aryl diazoacetates with sulfur ylides is described. This protocol features mild conditions, good functional group tolerance, and broad substrate scope for both aryl diazoacetates with sulfur ylides. Under optimal reaction conditions, a wide range of trisubstituted olefins is obtained in moderate to good yield, which can be further transferred to other biologically important heterocycles after a two-step simple operation.
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Affiliation(s)
- Cong Ye
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Bao-Gui Cai
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Juan Lu
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Xiao Cheng
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Lei Li
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Zhong-Wen Pan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials and Key Laboratory of Functional Inorganic Materials of Anhui Province, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, People's Republic of China.,Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, People's Republic of China
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194
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Ji W, Shi H, Wei P, Hao W, Tu S, Jiang B. Photocatalytic Annulation‐Carbohalogenation of 1,7‐Enynes for Atom‐Economic Synthesis of Functionalized 3,4‐Dihydronaphthalen‐1(2
H
)‐ones. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202001125] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Wen‐Zhe Ji
- Biotechnology and Pharmaceutical Engineering Nanjing Tech University Nanjing 210009 People's Republic of China
- School of Chemistry and Material Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Jiangsu Normal University Xuzhou 211116 People's Republic of China
| | - Hao‐Nan Shi
- School of Chemistry and Material Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Jiangsu Normal University Xuzhou 211116 People's Republic of China
| | - Ping Wei
- Biotechnology and Pharmaceutical Engineering Nanjing Tech University Nanjing 210009 People's Republic of China
| | - Wen‐Juan Hao
- School of Chemistry and Material Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Jiangsu Normal University Xuzhou 211116 People's Republic of China
| | - Shu‐Jiang Tu
- School of Chemistry and Material Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Jiangsu Normal University Xuzhou 211116 People's Republic of China
| | - Bo Jiang
- School of Chemistry and Material Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Jiangsu Normal University Xuzhou 211116 People's Republic of China
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195
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Liu J, Xu G, Tang S, Chen Q, Sun J. Site-Selective Functionalization of 7-Azaindoles via Carbene Transfer and Isolation of N-Aromatic Zwitterions. Org Lett 2020; 22:9376-9380. [DOI: 10.1021/acs.orglett.0c03653] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Junheng Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Guangyang Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Shengbiao Tang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Qun Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Jiangtao Sun
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
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196
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Li J, Lu XC, Xu Y, Wen JX, Hou GQ, Liu L. Photoredox Catalysis Enables Decarboxylative Cyclization with Hypervalent Iodine(III) Reagents: Access to 2,5-Disubstituted 1,3,4-Oxadiazoles. Org Lett 2020; 22:9621-9626. [DOI: 10.1021/acs.orglett.0c03663] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jian Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmacy, Changzhou University, Changzhou 213164, China
| | - Xue-Chen Lu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmacy, Changzhou University, Changzhou 213164, China
| | - Yue Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmacy, Changzhou University, Changzhou 213164, China
| | - Jin-Xia Wen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmacy, Changzhou University, Changzhou 213164, China
| | - Guo-Quan Hou
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmacy, Changzhou University, Changzhou 213164, China
| | - Li Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmacy, Changzhou University, Changzhou 213164, China
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197
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Jana S, Empel C, Pei C, Vinh Nguyen T, Koenigs RM. Gold‐catalyzed C−H Functionalization of Phenothiazines with Aryldiazoacetates. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000962] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sripati Jana
- RWTH Aachen University Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
| | - Claire Empel
- RWTH Aachen University Institute of Organic Chemistry Landoltweg 1 D-52074 Aachen Germany
- University of New South Wales School of Chemistry Sydney Australia
| | - Chao Pei
- 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
- University of New South Wales School of Chemistry Sydney Australia
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198
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Chen P, Nan J, Hu Y, Kang Y, Wang B, Ma Y, Szostak M. Metal-free tandem carbene N-H insertions and C-C bond cleavages. Chem Sci 2020; 12:803-811. [PMID: 34163814 PMCID: PMC8178978 DOI: 10.1039/d0sc05763k] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 11/09/2020] [Indexed: 01/16/2023] Open
Abstract
A metal-free C-H [5 + 1] annulation reaction of 2-arylanilines with diazo compounds has been achieved, giving rise to two types of prevalent phenanthridines via highly selective C-C cleavage. Compared to the simple N-H insertion manipulation of diazo, this method elegantly accomplishes a tandem N-H insertion/SEAr/C-C cleavage/aromatization reaction, and the synthetic utility of this new transformation is exemplified by the succinct syntheses of trisphaeridine and bicolorine alkaloids.
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Affiliation(s)
- Pu Chen
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Jiang Nan
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Yan Hu
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Yifan Kang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Bo Wang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Yangmin Ma
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
| | - Michal Szostak
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology Xi'an 710021 China
- Department of Chemistry, Rutgers University 73 Warren Street Newark New Jersey 07102 USA
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199
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Chen J, Liu S, Lv X, Hong K, Lei J, Xu X, Hu W. Blue Light-Promoted Formal [4+1]-Annulation of Diazoacetates with o-Aminoacetophenones: Synthesis of Polysubstituted Indolines and Computational Study. J Org Chem 2020; 85:13920-13928. [PMID: 33034191 DOI: 10.1021/acs.joc.0c01974] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A blue light-promoted formal [4+1]-annulation of diazoacetates with o-aminoacetophenones has been reported, which provides an environmentally friendly method for the synthesis of polysubstituted indoline derivatives in moderate to good yields with excellent diastereoselectivities. Detailed mechanistic studies through density functional theory calculations reveal that the (E)-enol species is the key intermediate in this transformation, and the excellent diastereoselectivity is enabled via H-bonding in the intramolecular Aldol-type addition.
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Affiliation(s)
- Jinzhou Chen
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Shuhao Liu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Xinxin Lv
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Kemiao Hong
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Jinping Lei
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Xinfang Xu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Wenhao Hu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
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