1
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Yang H, Wang Y, Wang LC, Wu XF. Visible light induced cooperative carbonylation and (hetero)aryl migration: synthesis of multi-carbonyl compounds. Chem Sci 2024:d4sc03221g. [PMID: 39156934 PMCID: PMC11325186 DOI: 10.1039/d4sc03221g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Accepted: 07/22/2024] [Indexed: 08/20/2024] Open
Abstract
Carbonylative transformation represents one of the most straightforward procedures for the synthesis of carbonyl-containing compounds. However, the carbonylative procedure toward 1,4-diketones is still limited which are key moieties with potent applications in various areas. Herein, we report a new strategy for the synthesis of multi-carbonyl compounds containing a 1,4-diketone skeleton through remote heteroaryl migration of traditionally restricted 1,3-migratory substrates utilizing carbon monoxide (CO) as the C1 synthon and diazonium compounds as the starting material.
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Affiliation(s)
- Hefei Yang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 116023 Dalian Liaoning China
- Leibniz-Institut für Katalyse e.V. 18059 Rostock Germany
| | - Yuanrui Wang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 116023 Dalian Liaoning China
| | - Le-Cheng Wang
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 116023 Dalian Liaoning China
- Leibniz-Institut für Katalyse e.V. 18059 Rostock Germany
| | - Xiao-Feng Wu
- Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences 116023 Dalian Liaoning China
- Leibniz-Institut für Katalyse e.V. 18059 Rostock Germany
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2
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Gu Y, Luo M, Yuan H, Liu G, Wang S. Photocatalytic Enantioselective Radical Cascade Multicomponent Minisci Reaction of β-Carbolines Using Diazo Compounds as Radical Precursors. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2402272. [PMID: 38639395 PMCID: PMC11220658 DOI: 10.1002/advs.202402272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 03/20/2024] [Indexed: 04/20/2024]
Abstract
Here, a photocatalytic asymmetric multicomponent cascade Minisci reaction of β-carbolines with enamides and diazo compounds is reported, enabling an effective enantioselective radical C─H functionalization of β-carbolines with high yields and enantioselectivity (up to 83% yield and 95% ee). This enantioselective multicomponent Minisci protocol exhibits step economy, high chemo-/enantio-selective control, and good functional group tolerance, allowing access to a variety of valuable chiral β-carbolines. Notably, diazo compounds are suitable radical precursors in enantioselective cascade radical reactions. Moreover, the efficiency and practicality of this approach are demonstrated by the asymmetric synthesis of bioactive compounds and natural products.
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Affiliation(s)
- Yi‐Jie Gu
- Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong518055P. R. China
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule of Ministry of EducationSchool of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtan411201P. R. China
| | - Mu‐Peng Luo
- Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong518055P. R. China
| | - Hua Yuan
- Key Laboratory of Theoretical Organic Chemistry and Function Molecule of Ministry of EducationSchool of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtan411201P. R. China
| | - Guo‐Kai Liu
- School of PharmacyShenzhen University Medical SchoolShenzhen UniversityShenzhenGuangdong518055P. R. China
| | - Shou‐Guo Wang
- Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong518055P. R. China
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3
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Fu R, Xu M, Wang Y, Wu X, Bao X. Organo-Photocatalytic Anti-Markovnikov Hydroamidation of Alkenes with Sulfonyl Azides: A Combined Experimental and Computational Study. Angew Chem Int Ed Engl 2024; 63:e202406069. [PMID: 38630112 DOI: 10.1002/anie.202406069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Indexed: 05/22/2024]
Abstract
The construction of C(sp3)-N bonds via direct N-centered radical addition with olefins under benign conditions is a desirable but challenging strategy. Herein, we describe an organo-photocatalytic approach to achieve anti-Markovnikov alkene hydroamidation with sulfonyl azides in a highly efficient manner under transition-metal-free and mild conditions. A broad range of substrates, including both activated and unactivated alkenes, are suitable for this protocol, providing a convenient and practical method to construct sulfonylamide derivatives. A synergistic experimental and computational mechanistic study suggests that the additive, Hantzsch ester (HE), might undergo a triplet-triplet energy transfer manner to achieve photosensitization by the organo-photocatalyst under visible light irradiation. Next, the resulted triplet excited state 3HE* could lead to a homolytic cleavage of C4-H bond, which triggers a straightforward H-atom transfer (HAT) style in converting sulfonyl azide to the corresponding key amidyl radical. Subsequently, the addition of the amidyl radical to alkene followed by HAT from p-toluenethiol could proceed to afford the desired anti-Markovnikov hydroamidation product. It is worth noting that mechanistic pathway bifurcation could be possible for this reaction. A feasible radical chain propagation mechanistic pathway is also proposed to rationalize the high efficiency of this reaction.
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Affiliation(s)
- Rui Fu
- Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu, 215123, China
| | - Mengyu Xu
- Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu, 215123, China
| | - Yujing Wang
- Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu, 215123, China
| | - Xinxin Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China
| | - Xiaoguang Bao
- Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu, 215123, China
- Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, Jiangsu, 215123, China
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4
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Zhang Z, Gevorgyan V. Visible Light-Induced Reactions of Diazo Compounds and Their Precursors. Chem Rev 2024; 124:7214-7261. [PMID: 38754038 DOI: 10.1021/acs.chemrev.3c00869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
In recent years, visible light-induced reactions of diazo compounds have attracted increasing attention in organic synthesis, leading to improvement of existing reactions, as well as to the discovery of unprecedented transformations. Thus, photochemical or photocatalytic generation of both carbenes and radicals provide milder tools toward these key intermediates for many valuable transformations. However, the vast majority of the transformations represent new reactivity modes of diazo compounds, which are achieved by the photochemical decomposition of diazo compounds and photoredox catalysis. In particular, the use of a redox-active photocatalysts opens the avenue to a plethora of radical reactions. The application of these methods to diazo compounds led to discovery of transformations inaccessible by the classical reactivity associated with carbenes and metal carbenes. In most cases, diazo compounds act as radical sources but can also serve as radical acceptors. Importantly, the described processes operate under mild, practical conditions. This Review describes this subfield of diazo compound chemistry, particularly focusing on recent advancements.
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Affiliation(s)
- Ziyan Zhang
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
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5
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He F, Sun Z, Xu Y, Yu J, Li W, Miao H, Wu C. Photoinduced [3+2] Cycloaddition of Alkyl-Acceptor Diazoalkanes: Diversity-Oriented Synthesis of Pyrazolines Containing a Quaternary Center. Org Lett 2024; 26:4031-4036. [PMID: 38277125 DOI: 10.1021/acs.orglett.3c04296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
We present a new [3+2] cycloaddition reaction between alkyl-acceptor diazoalkanes under visible light irradiation. By employing easily accessible alkyl-acceptor-type diazoalkanes or their precursor hydrazones as both 1,3-dipoles and dipolarophiles, a diverse range of pyrazoline derivatives featuring a quaternary center have been efficiently synthesized in a predictable manner, with excellent functional group tolerance and good yields. Furthermore, scale-up experiments and downstream transformations of the product were also detailed.
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Affiliation(s)
- Fengya He
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Ziyi Sun
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Yiwei Xu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Jingwen Yu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
| | - Wenyong Li
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Hui Miao
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
| | - Chenggui Wu
- Key Laboratory of Xin'an Medicine, Ministry of Education, Anhui University of Chinese Medicine, Hefei, Anhui 230038, China
- Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, Anhui 236037, P. R. China
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6
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Xie Y, Bao YP, Zhuo XY, Xuan J. Photocatalytic Synthesis of Indanone, Pyrone, and Pyridinone Derivatives with Diazo Compounds as Radical Precursors. Org Lett 2024; 26:1393-1398. [PMID: 38346022 DOI: 10.1021/acs.orglett.3c04331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
We disclose herein a photocatalytic radical cascade cyclization of diazoalkanes for the divergent synthesis of important carbocycles and heterocycles. Under the optimal reaction conditions, various indanone, pyrone, and pyridinone derivatives can be obtained in moderate to good yields. Mechanistic experiments support the formation of carbon-centered radicals from diazoalkanes through the proton-coupled electron transfer process. Scale-up reaction using continuous flow technology and useful downstream application of the formed heterocycles further render the strategy attractive and valuable.
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Affiliation(s)
- Yang Xie
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, China
| | - Ye-Peng Bao
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, China
| | - Xiao-Yan Zhuo
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials (Anhui University), Ministry of Education, Hefei 230601, China
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7
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Xu N, Pu M, Yu H, Yang G, Liu X, Feng X. Iron-Catalyzed Asymmetric α-Alkylation of 2-Acylimidazoles via Dehydrogenative Radical Cross-Coupling with Alkanes. Angew Chem Int Ed Engl 2024; 63:e202314256. [PMID: 37985963 DOI: 10.1002/anie.202314256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/19/2023] [Accepted: 11/20/2023] [Indexed: 11/22/2023]
Abstract
The direct α-alkylation of acyclic carbonyls with nonactivated hydrocarbons through C(sp3 )-H functionalization is both extremely promising and notably challenging, especially when attempting to achieve enantioselectivity using iron-based catalysts. We have identified a robust chiral iron complex for the oxidative cross-coupling of 2-acylimidazoles with benzylic and allylic hydrocarbons, as well as nonactivated alkanes. The readily available and tunable N,N'-dioxide catalysts of iron in connection with oxidants exhibit precise asymmetric induction (up to 99 % ee) with good compatibility in moderate to good yields (up to 88 % yield). This protocol provides an elegant and straightforward access to optically active acyclic carbonyl derivatives starting from simple alkanes without prefunctionalization. Density functional theory (DFT) calculations and control experiments were made to gain insight into the nature of C-C bond formation and the origin of enantioselectivity. We propose a radical-radical cross-coupling process enabled by the immediate interconversion between chiral ferric species and ferrous species.
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Affiliation(s)
- Nian Xu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Maoping Pu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Han Yu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Gaofei Yang
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, China
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8
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Orłowska K, Łuczak K, Krajewski P, Santiago JV, Rybicka-Jasińska K, Gryko D. Unlocking the reactivity of diazo compounds in red light with the use of photochemical tools. Chem Commun (Camb) 2023. [PMID: 37997166 DOI: 10.1039/d3cc05174a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Structurally diversified diazoalkanes can be activated under red light irradiation relying on direct photolysis, photosensitization or photoredox catalysis.
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Affiliation(s)
- Katarzyna Orłowska
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52 01-224, Warsaw, Poland.
| | - Klaudia Łuczak
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52 01-224, Warsaw, Poland.
| | - Piotr Krajewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52 01-224, Warsaw, Poland.
| | - João V Santiago
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52 01-224, Warsaw, Poland.
| | | | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52 01-224, Warsaw, Poland.
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9
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Usui K, Amano A, Murayama K, Sasaya M, Kusumoto R, Umeno T, Murase S, Iizuka N, Matsumoto S, Fuchi Y, Takahashi K, Kawahata M, Kobori Y, Karasawa S. Photoisomerization of "Partially Embedded Dihydropyridazine" with a Helical Structure. Chemistry 2023; 29:e202302413. [PMID: 37612241 DOI: 10.1002/chem.202302413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/21/2023] [Accepted: 08/23/2023] [Indexed: 08/25/2023]
Abstract
Herein, we report the synthesis of two "partially embedded fused-dihydropyridazine N-aryl aza[5]helicene derivatives" (PDHs) and the demonstration of their intrinsic photo-triggered multi-functional properties based on a Kekulé biradical structure. Introducing bulky electron-withdrawing trifluoromethyl or pentafluoroethyl groups into the aza[5]helicene framework (PDH-CF3 and -C2 F5 ) gives PDH axial chirality based on the helicity of the P and M forms, even at room temperature. Upon photo-irradiation of PDH-CF3 in a frozen solution, an ESR signal from the triplet biradical with zero-field splitting values, generated by N-N bond dissociation, was observed. However, when the irradiation was turned off, the ESR signal became silent, thus indicating the existence of two equilibria: between the biradical and quinoidal forms based on the Kekulé structure, and between N-N bond cleavage and recombination. The observed photo- and thermally induced behaviors indicate that T-type photochromic molecules are involved in the photoisomerization mechanism involving the two equilibria. Inspired by the photoisomerization, chirality control of PDH by photoracemization was achieved. Multiple functionalities, such as T-type photochromism, photo-excitation-mediated triplet biradical formation, and photoracemization, which are attributed to the "partially embedded dihydropyridazine" structure, are demonstrated.
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Affiliation(s)
- Kazuteru Usui
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Ami Amano
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Kasumi Murayama
- Department of Chemistry, Graduate School of Science Kobe University, Kobe, Hyogo, 657-8501, Japan
| | - Miho Sasaya
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Ryota Kusumoto
- Department of Chemistry, Graduate School of Science Kobe University, Kobe, Hyogo, 657-8501, Japan
| | - Tomohiro Umeno
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Satsuki Murase
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Naoko Iizuka
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Shota Matsumoto
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Yasufumi Fuchi
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Kazuyuki Takahashi
- Department of Chemistry, Graduate School of Science Kobe University, Kobe, Hyogo, 657-8501, Japan
| | - Masatoshi Kawahata
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Yasuhiro Kobori
- Department of Chemistry, Graduate School of Science Kobe University, Kobe, Hyogo, 657-8501, Japan
- Molecular Photoscience Research Center, Graduate School of Science Kobe University, Kobe, Hyogo, 657-8501, Japan
| | - Satoru Karasawa
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3512-1 Higashi-tamagawagakuen, Machida, Tokyo, 194-8543, Japan
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10
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Yan M, Xiao L, Xiong J, Jin L, Stephan DW, Guo J. Borane catalyzed transesterification of tert-butyl esters using α-aryl α-diazoesters. Org Biomol Chem 2023; 21:8279-8283. [PMID: 37812087 DOI: 10.1039/d3ob01548c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
The B(C6F5)3-catalyzed transesterification of a series of 3-alkenyl-oxindoles and other unsaturated tert-butyl esters with aryl-diazo esters is reported. This protocol is facile and generally high yielding proceeding under mild conditions and is remarkably chemoselective leaving the CC bonds intact.
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Affiliation(s)
- Maying Yan
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Lei Xiao
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Jiangkun Xiong
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Lvnan Jin
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Douglas W Stephan
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
- Department of Chemistry, University of Toronto, Toronto, 80 St. George Street, Ontario M5S 3H6, Canada.
| | - Jing Guo
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
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11
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Rolka AB, Archipowa N, Kutta RJ, König B, Toste FD. Hybrid Catalysts for Enantioselective Photo-Phosphoric Acid Catalysis. J Org Chem 2023; 88:6509-6522. [PMID: 37126846 PMCID: PMC10198958 DOI: 10.1021/acs.joc.3c00191] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The syntheses of two novel, organic, and chiral photocatalysts are presented. By combining donor-acceptor cyanoarene-based photocatalysts with a chiral phosphoric acid, bifunctional catalysts have been designed. In preliminary proof-of-concept reactions, their use in both enantioselective energy transfer and photoredox catalysis is demonstrated.
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Affiliation(s)
- Alessa B Rolka
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Nataliya Archipowa
- Institute of Biophysics and Physical Biochemistry, Faculty of Biology and Preclinical Medicine, University of Regensburg, D-93040 Regensburg, Germany
| | - Roger J Kutta
- Institute of Theoretical and Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany
| | - Burkhard König
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany
| | - F Dean Toste
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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12
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Okumatsu D, Kawanaka K, Kainuma S, Kiyokawa K, Minakata S. α-Amination of Carbonyl Compounds by Using Hypervalent Iodine-Based Aminating Reagents Containing a Transferable (Diarylmethylene)amino Group. Chemistry 2023; 29:e202203722. [PMID: 36604401 DOI: 10.1002/chem.202203722] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/05/2023] [Accepted: 01/05/2023] [Indexed: 01/07/2023]
Abstract
Hypervalent iodine-based aminating reagents containing a transferable (diarylmethylene)amino group can be used for the α-amination of simple carbonyl compounds such as esters, amides, and ketones in the presence of a lithium base. The (diarylmethylene)amino groups of the products can be readily modified, thus providing access to primary amines and diarylmethylamines. The developed method features transition-metal-free conditions and a simple one-pot procedure without the need to prepare enolate equivalents separately, thus offering a general and practical approach to the synthesis of a wide variety of α-amino carbonyl compounds. Experimental mechanistic investigations indicate that this amination proceeds through a unique radical coupling of an α-carbonyl radical with an iminyl radical; they are generated through a single-electron transfer between a lithium enolate and the hypervalent iodine reagent.
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Affiliation(s)
- Daichi Okumatsu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan
| | - Kazuki Kawanaka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan
| | - Shunpei Kainuma
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan
| | - Kensuke Kiyokawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan
| | - Satoshi Minakata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan
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13
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Xiao L, Jin L, Zhao Y, Guo J, Stephan DW. B(C 6F 5) 3-catalyzed cyclopropanation of 3-alkenyl-oxindoles with diazomethanes. Chem Commun (Camb) 2023; 59:1833-1836. [PMID: 36722917 DOI: 10.1039/d2cc06744g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Spirocyclopropane-oxindoles are key motifs in biologically active compounds and are versatile synthetic intermediates. Herein, we report a metal-free, B(C6F5)3 catalyzed cyclopropanation of 3-alkenyl-oxindoles with diazomethanes. This provides 25 variants of spirocyclopropane-oxindole derivatives. These spirocyclopropane-oxindole products were obtained in good to excellent yields (up to 99%) and high diastereoselectivities (up to 20 : 1 d.r.) under mild reaction conditions and could be performed on a gram scale.
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Affiliation(s)
- Lei Xiao
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Lvnan Jin
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Yunbo Zhao
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Jing Guo
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China.
| | - Douglas W Stephan
- Institute of Drug Discovery Technology, Ningbo University, Zhejiang, China. .,Department of Chemistry, University of Toronto, Toronto, 80 St. George Street, Ontario M5S 3H6, Canada
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14
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Duan X, Cui D, Wang Z, Zheng D, Jiang L, Huang WY, Jia YX, Xu J. A Photoenzymatic Strategy for Radical-Mediated Stereoselective Hydroalkylation with Diazo Compounds. Angew Chem Int Ed Engl 2023; 62:e202214135. [PMID: 36478374 DOI: 10.1002/anie.202214135] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/02/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
Abstract
Carbene insertion reactions initiated with diazo compounds have been widely used to develop unnatural enzymatic reactions. However, alternative functionalization of diazo compounds in enzymatic processes has been unexploited. Herein, we describe a photoenzymatic strategy for radical-mediated stereoselective hydroalkylation with diazo compounds. This method generates carbon-centered radicals through an ene reductase catalyzed photoinduced electron transfer process from diazo compounds, enabling the synthesis of γ-stereogenic carbonyl compounds in good yields and stereoselectivities. This study further expands the possible reaction patterns in photo-biocatalysis and offers a new approach to solving the selectivity challenges of radical-mediated reactions.
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Affiliation(s)
- Xinyu Duan
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Dong Cui
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Zhiguo Wang
- Institute of Aging Research, School of Basic Medical Sciences, Hangzhou Normal University, Hangzhou, 311121, P. R. China
| | - Dannan Zheng
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Linye Jiang
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Wen-Yu Huang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Yi-Xia Jia
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, P. R. China
| | - Jian Xu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
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15
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Zhou Y, Yue X, Jiang F, Sun J, Guo W. Catalytic asymmetric synthesis of α-tertiary aminoketones from sulfoxonium ylides bearing two aryl groups. Chem Commun (Camb) 2023; 59:1193-1196. [PMID: 36629287 DOI: 10.1039/d2cc06147c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Disclosed herein is an efficient organocatalytic formal N-H insertion reaction of arylamines with α-keto sulfoxonium ylides bearing two aryl groups, delivering a broad range of α-tertiary aminoketones with good to excellent yields and enantioselectivities (up to 90% yield and 94% ee). The utilities of this protocol were also demonstrated by facile preparation of enantioenriched 2-amino-1,2-diarylethanol bearing two different aryl groups, a type of important building block lacking efficient access.
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Affiliation(s)
- Ying Zhou
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
| | - Xin Yue
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
| | - Feng Jiang
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
| | - Jianwei Sun
- Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Wengang Guo
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
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16
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Verma R, Jindal P, Prasad J, Kothari SL, Lamba NP, Dandia A, Khangarot RK, Chauhan MS. Recent Trends in Photocatalytic Enantioselective Reactions. Top Curr Chem (Cham) 2022; 380:48. [DOI: 10.1007/s41061-022-00402-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 07/31/2022] [Indexed: 11/30/2022]
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17
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Mahato SK, Zhang T, Chatani N. Ir(III)-Catalyzed C(sp 2)–H Amidation of 2-Aroylimidazoles with 2,2,2-Trichloroethoxycarbonyl Azide (TrocN 3). J Org Chem 2022; 87:16390-16398. [DOI: 10.1021/acs.joc.2c02056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sanjit K. Mahato
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Chemistry At CreAgro (Discovery), PI Industries Ltd., Udaipur, Rajasthan 313001, India
| | - Tianhao Zhang
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
- Research Center for Environmental Preservation, Osaka University, 2-4 Yamadaoka, Suita, Osaka 565-0871, Japan
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18
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Cai BG, Bao YP, Pei C, Li Q, Li L, Koenigs RM, Xuan J. Photochemical synthesis of 1,2,4-triazoles via addition reaction of triplet intermediates to diazoalkanes and azomethine ylide intermediates. Chem Sci 2022; 13:13141-13146. [PMID: 36425480 PMCID: PMC9667952 DOI: 10.1039/d2sc04720a] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 10/22/2022] [Indexed: 09/19/2023] Open
Abstract
The reactivity of diazoalkanes most commonly proceeds through the formation of carbene intermediates or dipolar cycloaddition reactions. The reaction of diazoalkanes with intermediates with unpaired electrons, however, is much less elaborated. Herein, we report on the photochemical reaction of acceptor-only diazoalkanes with azodicarboxylates. Photoexcitation of the latter results in the formation of a triplet species, which undergoes an addition reaction with diazoalkanes and formation of an azomethine ylide followed by dipolar cycloaddition reaction with organic nitriles to give a 1,2,4-triazole. The application of this transformation was elaborated in a broad and general substrate scope (48 examples), including scale-up via flow chemistry and downstream transformations. Experimental and computational studies were performed to elucidate the reaction mechanism and to rationalize the reaction outcome.
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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 China
| | - Ye-Peng Bao
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University Hefei Anhui 230601 China
| | - Chao Pei
- Institute of Organic Chemistry, RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Qian Li
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University Hefei Anhui 230601 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 China
| | - Rene M Koenigs
- Institute of Organic Chemistry, RWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University Hefei Anhui 230601 China
- Key Laboratory of Structure and Functional Regulation of Hybrid Materials, (Anhui University), Ministry of Education Hefei Anhui 230601 China
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19
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Selective functionalization of benzylic C(sp3)–H bonds to synthesize complex molecules. Chem 2022. [DOI: 10.1016/j.chempr.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Liu Y, Zhu K, Zhao J, Li P. Photocatalytic Regioselective Difunctionalization of Alkenes with Diazo Compounds and tert-Butyl Nitrite: Access to γ-Oximino Esters. Org Lett 2022; 24:6834-6838. [PMID: 36073998 DOI: 10.1021/acs.orglett.2c02749] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A visible-light photocatalytic regioselective difunctionalization of alkenes with diazo compounds and tert-butyl nitrite has been developed. The protocol provides an efficient approach to γ-oximino esters under mild conditions. Significantly, this transformation not only shows the good compatibility of nucleophilic diazo compounds and electrophilic tert-butyl nitrite but also displays diazo compounds generating alkyl radicals that preferred addition to alkenes over nitroso radicals.
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Affiliation(s)
- Yantao Liu
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Keyong Zhu
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Jingjing Zhao
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
| | - Pan Li
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China
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21
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Ye HB, Zhou XY, Li L, He XK, Xuan J. Photochemical Synthesis of Succinic Ester-Containing Phenanthridines from Diazo Compounds as 1,4-Dicarbonyl Precursors. Org Lett 2022; 24:6018-6023. [PMID: 35947775 DOI: 10.1021/acs.orglett.2c02313] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We disclosed herein a straightforward photochemical method for the construction of phenanthridines containing a synthetically useful succinate unit. The reaction occurred under visible-light irradiation with cheap eosin Y Na as photoredox catalyst and a diazo compound as the succinate precursor. Under the optimal reaction conditions, a wide range of phenanthridines were obtained in moderate to good yields. Note that the succinate units in the final heterocycles could be easily transformed into many valuable structures, such as γ-butyrolactone, dihydrofuran-2(3H)-one, and tetrahydrofuran. Mechanistic experiments were performed to support the proposed mechanism.
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Affiliation(s)
- Hai-Bing Ye
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui 230601, China
| | - Xu-Yu Zhou
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui 230601, China
| | - Lei Li
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui 230601, China
| | - Xiang-Kui He
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui 230601, China
| | - Jun Xuan
- Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry and Chemical Engineering, Anhui University, Hefei, Anhui 230601, China.,Key Laboratory of Structure and Functional Regulation of Hybrid Materials, Ministry of Education, Hefei, Anhui 230601, China
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22
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Zhu S, Li F, Empel C, Jana S, Pei C, Koenigs RM. Furan synthesis via triplet sensitization of acceptor/acceptor diazoalkanes. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Fang Li
- RWTH Aachen University GERMANY
| | | | - Sripati Jana
- Indian Institute of Technology Kharagpur Department of Chemistry INDIA
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23
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Singh S, Tripathi KN, Singh RP. Redox activated amines in the organophotoinduced alkylation of coumarins. Org Biomol Chem 2022; 20:5716-5720. [PMID: 35838252 DOI: 10.1039/d2ob00943a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The coumarin core represents the quintessential scaffold of many natural products. While C-3 alkylation is easily achievable, effective greener strategies for C-4 alkylation have been less forthcoming. Herein, we report a metal-free photoinduced deaminative strategy for C-4 alkylation of coumarins using redox activated secondary and benzylic amine derived Katritzky pyridinium salts.
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Affiliation(s)
- Shashank Singh
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
| | - Krishna N Tripathi
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
| | - Ravi P Singh
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
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24
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Abstract
Synthetic chemists have long focused on selective C(sp 3)-N bond-forming approaches in response to the high value of this motif in natural products, pharmaceutical agents and functional materials. In recent years, visible light-induced protocols have become an important synthetic platform to promote this transformation under mild reaction conditions. These photo-driven methods rely on converting visible light into chemical energy to generate reactive but controllable radical species. This Review highlights recent advances in this area, mostly after 2014, with an emphasis placed on C(sp 3)-H bond activations, including amination of olefins and carbonyl compounds, and cross-coupling reactions.
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25
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Yin Q, Li Z, Wu F, Ji M, Fu C, Wu X. Conjugate Addition of α‐Substituted Acyl Imidazoles to Nitroalkenes Catalyzed by Nickel Bisoxazoline and B(C6F5)3. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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26
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Li F, Zhu S, Koenigs RM. Photocatalytic 1,2-oxo-alkylation reaction of styrenes with diazoacetates. Chem Commun (Camb) 2022; 58:7526-7529. [PMID: 35703319 DOI: 10.1039/d2cc02414d] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report on the photocatalytic 1,2-difunctionalization reaction of styrenes with acceptor-only diazoalkanes. In the presence of DABCO and tBuOOH, the carbene reactivity of diazoalkanes can be suppressed and a 1,2 oxo-alkylation reaction can be achieved (32 examples, up to 94% yield) without the formation of cyclopropane by-products via the formation of radical intermediates from ethyl diazoacetate.
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Affiliation(s)
- Fang Li
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany.
| | - Siqi Zhu
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany.
| | - Rene M Koenigs
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany.
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27
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Mahato SK, Chatani N. Carboxylate-Assisted Iridium (III)-Catalyzed C(sp 2)-H Amidation of 2-Aroylimidazoles With Dioxazolones. J Org Chem 2022; 87:8183-8193. [PMID: 35666267 DOI: 10.1021/acs.joc.2c00949] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The Ir(III)-catalyzed ortho C-H amidation of 2-aroylimidazoles with 3-aryldioxazolones as an amidating reagent is reported. The method provides a broad substrate scope with wide functional group compatibility. Mechanistic studies indicate that C-H bond cleavage is reversible and appears not to be the rate-determining step. The presence of an electron-donating group in the 2-aroylimidazoles and an electron-withdrawing group in the 3-aryldioxazoles significantly accelerates the reaction, suggesting that nitrene insertion is the rate-determining step.
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Affiliation(s)
- Sanjit K Mahato
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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28
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Huang CY, Li J, Li CJ. Photocatalytic C(sp 3) radical generation via C-H, C-C, and C-X bond cleavage. Chem Sci 2022; 13:5465-5504. [PMID: 35694342 PMCID: PMC9116372 DOI: 10.1039/d2sc00202g] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 04/17/2022] [Indexed: 12/12/2022] Open
Abstract
C(sp3) radicals (R˙) are of broad research interest and synthetic utility. This review collects some of the most recent advancements in photocatalytic R˙ generation and highlights representative examples in this field. Based on the key bond cleavages that generate R˙, these contributions are divided into C–H, C–C, and C–X bond cleavages. A general mechanistic scenario and key R˙-forming steps are presented and discussed in each section. C(sp3) radicals (R˙) are of broad research interest and synthetic utility.![]()
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Affiliation(s)
- Chia-Yu Huang
- Department of Chemistry, FRQNT Centre for Green Chemistry and Catalysis, McGill University 801 Sherbrooke Street W. Montreal Quebec H3A 0B8 Canada
| | - Jianbin Li
- Department of Chemistry, FRQNT Centre for Green Chemistry and Catalysis, McGill University 801 Sherbrooke Street W. Montreal Quebec H3A 0B8 Canada
| | - Chao-Jun Li
- Department of Chemistry, FRQNT Centre for Green Chemistry and Catalysis, McGill University 801 Sherbrooke Street W. Montreal Quebec H3A 0B8 Canada
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29
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Fu X, Tang J, Hua R, Li X, Kang Z, Qiu H, Hu W. Functionalization of DNA-Tagged Alkenes with Diazo Compounds via Photocatalysis. Org Lett 2022; 24:2208-2213. [PMID: 35289626 DOI: 10.1021/acs.orglett.2c00516] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To explore potential chemical space using DNA-encoded library (DEL) technology, the development of various types of robust DNA-compatible reactions is urgently needed. Diazo compounds, which serve as valuable building blocks and important synthons in synthetic chemistry, have been rarely applied in DEL synthesis, probably because of their potential modifications of the bases and phosphate backbone of DNA. Herein we report two cases of DNA-compatible reactions with alkenes and diazo compounds, providing corresponding hydroalkylation and cyclopropanation products in moderate to excellent yields. Notably, these transformations not only provide new access to C(sp3)-C(sp3) bond formation in DELs with excellent functional group tolerance but also represent practical ligation methods to introduce functionalized molecules into DNA.
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Affiliation(s)
- Xiang Fu
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Jie Tang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Ruyu Hua
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Xiaoqian Li
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Zhenghui Kang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Huang Qiu
- 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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30
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Jamshaid S, Lee YR. Lewis-Acid-Catalyzed Regioselective Construction of Diversely Functionalized Polycyclic Fused Furans. Org Lett 2022; 24:1351-1356. [PMID: 35118858 DOI: 10.1021/acs.orglett.2c00019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel, facile, and efficient Lewis-acid-catalyzed [4 + 1] annulation protocol for the construction of functionalized polycyclic-fused furans is developed. This methodology is free of transition metals and ligands and provides a rapid synthetic route to divergently orientated polycyclic furans in good yields. In addition, this protocol can also be used to synthesize multisubstituted furans.
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Affiliation(s)
- Sana Jamshaid
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
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31
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Abstract
The fields of C-H functionalization and photoredox catalysis have garnered enormous interest and utility in the past several decades. Many different scientific disciplines have relied on C-H functionalization and photoredox strategies including natural product synthesis, drug discovery, radiolabeling, bioconjugation, materials, and fine chemical synthesis. In this Review, we highlight the use of photoredox catalysis in C-H functionalization reactions. We separate the review into inorganic/organometallic photoredox catalysts and organic-based photoredox catalytic systems. Further subdivision by reaction class─either sp2 or sp3 C-H functionalization─lends perspective and tactical strategies for use of these methods in synthetic applications.
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Affiliation(s)
- Natalie Holmberg-Douglas
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - David A Nicewicz
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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32
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Genzink MJ, Kidd JB, Swords WB, Yoon TP. Chiral Photocatalyst Structures in Asymmetric Photochemical Synthesis. Chem Rev 2022; 122:1654-1716. [PMID: 34606251 PMCID: PMC8792375 DOI: 10.1021/acs.chemrev.1c00467] [Citation(s) in RCA: 134] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Asymmetric catalysis is a major theme of research in contemporary synthetic organic chemistry. The discovery of general strategies for highly enantioselective photochemical reactions, however, has been a relatively recent development, and the variety of photoreactions that can be conducted in a stereocontrolled manner is consequently somewhat limited. Asymmetric photocatalysis is complicated by the short lifetimes and high reactivities characteristic of photogenerated reactive intermediates; the design of catalyst architectures that can provide effective enantiodifferentiating environments for these intermediates while minimizing the participation of uncontrolled racemic background processes has proven to be a key challenge for progress in this field. This review provides a summary of the chiral catalyst structures that have been studied for solution-phase asymmetric photochemistry, including chiral organic sensitizers, inorganic chromophores, and soluble macromolecules. While some of these photocatalysts are derived from privileged catalyst structures that are effective for both ground-state and photochemical transformations, others are structural designs unique to photocatalysis and offer insight into the logic required for highly effective stereocontrolled photocatalysis.
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Affiliation(s)
- Matthew J Genzink
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jesse B Kidd
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Wesley B Swords
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Tehshik P Yoon
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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33
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Mondal S, Dumur F, Gigmes D, Sibi MP, Bertrand MP, Nechab M. Enantioselective Radical Reactions Using Chiral Catalysts. Chem Rev 2022; 122:5842-5976. [DOI: 10.1021/acs.chemrev.1c00582] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shovan Mondal
- Department of Chemistry, Syamsundar College, Shyamsundar 713424, West Bengal, India
| | - Frédéric Dumur
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, F-13390e Marseille, France
| | - Didier Gigmes
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, F-13390e Marseille, France
| | - Mukund P. Sibi
- Department of Chemistry and Biochemistry North Dakota State University, Fargo, North Dakota 58108, United States
| | - Michèle P. Bertrand
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, F-13390e Marseille, France
| | - Malek Nechab
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire UMR 7273, F-13390e Marseille, France
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34
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Su YL, Liu GX, De Angelis L, He R, Al-Sayyed A, Schanze KS, Hu WH, Qiu H, Doyle MP. Radical Cascade Multicomponent Minisci Reactions with Diazo Compounds. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05611] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yong-Liang Su
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Geng-Xin Liu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Luca De Angelis
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Ru He
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Ammar Al-Sayyed
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Kirk S. Schanze
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
| | - Wen-Hao Hu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Huang Qiu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Michael P. Doyle
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle, San Antonio, Texas 78249, United States
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35
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Zhang Z, Kvasovs N, Dubrovina A, Gevorgyan V. Visible Light Induced Brønsted Acid Assisted Pd‐Catalyzed Alkyl Heck Reaction of Diazo Compounds and
N
‐Tosylhydrazones. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ziyan Zhang
- Department of Chemistry and Biochemistry University of Texas at Dallas 800 West Campbell Rd Richardson TX 75080 USA
| | - Nikita Kvasovs
- Department of Chemistry and Biochemistry University of Texas at Dallas 800 West Campbell Rd Richardson TX 75080 USA
| | - Anastasiia Dubrovina
- Department of Chemistry and Biochemistry University of Texas at Dallas 800 West Campbell Rd Richardson TX 75080 USA
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry University of Texas at Dallas 800 West Campbell Rd Richardson TX 75080 USA
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36
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Zhang Z, Kvasovs N, Dubrovina A, Gevorgyan V. Visible Light Induced Brønsted Acid Assisted Pd-Catalyzed Alkyl Heck Reaction of Diazo Compounds and N-Tosylhydrazones. Angew Chem Int Ed Engl 2022; 61:e202110924. [PMID: 34706124 PMCID: PMC8712420 DOI: 10.1002/anie.202110924] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/04/2021] [Indexed: 01/05/2023]
Abstract
A mild visible light-induced palladium-catalyzed alkyl Heck reaction of diazo compounds and N-tosylhydrazones is reported. A broad range of vinyl arenes and heteroarenes with high functional group tolerance, as well as a range of different diazo compounds, can efficiently undergo this transformation. This method features Brønsted acid-assisted generation of hybrid palladium C(sp3 )-centered radical intermediate, which allowed for new selective C-H functionalization protocol.
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Affiliation(s)
- Ziyan Zhang
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 West Campbell Rd, Richardson, TX, 75080, USA
| | - Nikita Kvasovs
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 West Campbell Rd, Richardson, TX, 75080, USA
| | - Anastasiia Dubrovina
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 West Campbell Rd, Richardson, TX, 75080, USA
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 West Campbell Rd, Richardson, TX, 75080, USA
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37
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Wen W, Ai ZP, Yang CL, Li CX, Wu ZL, Cai T, Guo QX. Enantioselective synthesis of α-amino ketones through palladium-catalyzed asymmetric arylation of α-keto imines. Chem Sci 2022; 13:3796-3802. [PMID: 35432891 PMCID: PMC8966749 DOI: 10.1039/d2sc00386d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 03/06/2022] [Indexed: 11/23/2022] Open
Abstract
Chiral α-amino ketones are common structural motifs in natural products and pharmaceuticals, as well as important synthons in organic synthesis. Thus, establishing efficient methods for preparing compounds with these privileged scaffolds is an important endeavor in synthetic chemistry. Herein we disclose a new catalytic asymmetric approach for the synthesis of chiral α-amino ketones through a chiral palladium-catalyzed arylation reaction of in situ generated challenging α-keto imines from previously unreported C-acyl N-sulfonyl-N,O-aminals, with arylboronic acids. The current reaction offers a straightforward approach to the asymmetric synthesis of acyclic α-amino ketones in a practical and highly stereocontrolled manner. Meanwhile, the multiple roles of the chiral Pd(ii) complex catalyst in the reaction were also reported. Chiral α-amino ketones are common structural motifs in natural products and pharmaceuticals, as well as important synthons in organic synthesis.![]()
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Affiliation(s)
- Wei Wen
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhao-Pin Ai
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Chang-Lin Yang
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Chao-Xing Li
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhu-Lian Wu
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Tian Cai
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Qi-Xiang Guo
- Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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38
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Empel C, Pei C, Koenigs RM. Unlocking novel reaction pathways of diazoalkanes with visible light. Chem Commun (Camb) 2022; 58:2788-2798. [DOI: 10.1039/d1cc06521a] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photochemistry has recently attracted the interest of synthetic chemists to conduct photolysis reactions of diazoalkanes. In this feature article, we provide a concise overview on this field, starting with discoveries...
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39
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Cheng X, Li D, Yang B, Lin Y, Gong L. Recent Advances in Visible-Light Photocatalytic Asymmetric Synthesis Enabled by Chiral Lewis Acids. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202205032] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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40
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Yamazaki K, Mahato SK, Ano Y, Chatani N. Double 1,2-Migration of Bromine and Silicon in Directed C–H Alkynylation Reactions with Silyl-Substituted Alkynyl Bromides through an Iridium Vinylidene Intermediate. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ken Yamazaki
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Sanjit K. Mahato
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yusuke Ano
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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41
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Zhang B, Qi JQ, Liu Y, Li Z, Wang J. Visible-Light-Driven Bisfunctionalization of Unactivated Olefins via the Merger of Proton-Coupled Electron Transfer and Carbene Catalysis. Org Lett 2021; 24:279-283. [PMID: 34932364 DOI: 10.1021/acs.orglett.1c03941] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, we reported an N-heterocyclic carbene (NHC) and photo-co-catalyzed alkylacylation of olefins in the presence of the versatile synthon diazo ester, providing a new idea for transient radical generation with the only byproduct being N2. Particularly, this radical process employs traditional carbene precursor diazo esters as the radical source, which is the first case in NHC catalysis. Compared to the previous pathway that produces radicals with large discard fragments, this merged channel possesses great atom economy.
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Affiliation(s)
- Bei Zhang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beiing 100084, China
| | - Jian-Qing Qi
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beiing 100084, China
| | - Yuhan Liu
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beiing 100084, China
| | - Zhipeng Li
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beiing 100084, China
| | - Jian Wang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beiing 100084, China
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42
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Dey P, Rai P, Maji B. Recent Development of Bis-Cyclometalated Chiral-at-Iridium and Rhodium Complexes for Asymmetric Catalysis. ACS ORGANIC & INORGANIC AU 2021; 2:99-125. [PMID: 36855455 PMCID: PMC9954445 DOI: 10.1021/acsorginorgau.1c00032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The field of asymmetric catalysis has been developing to access synthetically efficacious chiral molecules from the last century. Although there are many sustainable ways to produce nonracemic molecules, simplified and unique methodologies are always appreciated. In the recent developments of asymmetric catalysis, chiral-at-metal Lewis acid catalysis has been recognized as an attractive strategy. The catalysts coordinatively activate a substrate while serving the sole source of chirality by virtue of its helical environment. These configurationally stable complexes were utilized in a large number of asymmetric transformations, ranging from asymmetric Lewis acid catalysis to photoredox and electrocatalysis. Here we provide a comprehensive review of the current advancements in asymmetric catalysis utilizing iridium and rhodium-based chiral-at-metal complexes as catalysts. First, the asymmetric transformations via LUMO and HOMO activation assisted by a chiral Lewis acid catalyst are reviewed. In the second part, visible-light-induced asymmetric catalysis is summarized. The asymmetric transformation via the electricity-driven method is discussed in the final section.
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43
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Devi L, Pokhriyal A, Shekhar S, Kant R, Mukherjee S, Rastogi N. Organo‐photocatalytic Synthesis of 6‐
β
‐Disubstituted Phenanthridines from
α
‐Diazo‐
β‐
Keto Compounds and Vinyl Azides. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Lalita Devi
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173 Lucknow 226031 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Ayushi Pokhriyal
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173 Lucknow 226031 India
| | - Shashi Shekhar
- Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal 462066 Madhya Pradesh India
| | - Ruchir Kant
- Biochemistry & Structural Biology Division CSIR-Central Drug Research Institute Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173 Lucknow 226031 India
| | - Saptarshi Mukherjee
- Department of Chemistry Indian Institute of Science Education and Research Bhopal Bhopal 462066 Madhya Pradesh India
| | - Namrata Rastogi
- Medicinal & Process Chemistry Division CSIR-Central Drug Research Institute Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173 Lucknow 226031 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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44
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Demirel N, Qin J, Ivlev SI, Harms K, Meggers E. Catalytic Enantioselective Oxidative Homocoupling of 2‐Acyl Imidazoles. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nemrud Demirel
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Jie Qin
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Sergei I. Ivlev
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Klaus Harms
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
| | - Eric Meggers
- Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Strasse 4 35043 Marburg Germany
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45
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Huang X, Chen X, Xie H, Tan Z, Jiang H, Zeng W. Visible-Light-Catalyzed in Situ Denitrogenative Sulfonylation of Sulfonylhydrazones. Org Lett 2021; 23:6784-6788. [PMID: 34406020 DOI: 10.1021/acs.orglett.1c02369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A photocatalyzed in situ denitrogenative sulfonylation of N-arylsulfonyl hydrazones has been developed. This transformation provides a low-carbon strategy to assemble arylalkyl sulfones in a stepwise denitrogenation/sulfonylation manner.
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Affiliation(s)
- Xiang Huang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Xing Chen
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Haisheng Xie
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Zheng Tan
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
| | - Wei Zeng
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China
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46
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Zhao H, Hu B, Xu L, Walsh PJ. Palladium-catalyzed benzylic C(sp 3)-H carbonylative arylation of azaarylmethyl amines with aryl bromides. Chem Sci 2021; 12:10862-10870. [PMID: 34476065 PMCID: PMC8372623 DOI: 10.1039/d1sc02078a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 07/06/2021] [Indexed: 01/08/2023] Open
Abstract
A highly selective palladium-catalyzed carbonylative arylation of weakly acidic benzylic C(sp3)-H bonds of azaarylmethylamines with aryl bromides under 1 atm of CO gas has been achieved. This work represents the first examples of use of such weakly acidic pronucleophiles in this class of transformations. In the presence of a NIXANTPHOS-based palladium catalyst, this one-pot cascade process allows a range of azaarylmethylamines containing pyridyl, quinolinyl and pyrimidyl moieties and acyclic and cyclic amines to undergo efficient reactions with aryl bromides and CO to provide α-amino aryl-azaarylmethyl ketones in moderate to high yields with a broad substrate scope and good tolerance of functional groups. This reaction proceeds via in situ reversible deprotonation of the benzylic C-H bonds to give the active carbanions, thereby avoiding prefunctionalized organometallic reagents and generation of additional waste. Importantly, the operational simplicity, scalability and diversity of the products highlight the potential applicability of this protocol.
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Affiliation(s)
- Haoqiang Zhao
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
- Department of Chemistry, Renmin University of China Beijing 100872 China
| | - Bowen Hu
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania 231 South 34th Street Philadelphia Pennsylvania 19104-6323 USA
| | - Lijin Xu
- Department of Chemistry, Renmin University of China Beijing 100872 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 Pennsylvania 19104-6323 USA
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47
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Su Y, Dong K, Zheng H, Doyle MP. Generation of Diazomethyl Radicals by Hydrogen Atom Abstraction and Their Cycloaddition with Alkenes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yong‐Liang Su
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Kuiyong Dong
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Haifeng Zheng
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Michael P. Doyle
- Department of Chemistry The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
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48
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Bell JD, Murphy JA. Recent advances in visible light-activated radical coupling reactions triggered by (i) ruthenium, (ii) iridium and (iii) organic photoredox agents. Chem Soc Rev 2021; 50:9540-9685. [PMID: 34309610 DOI: 10.1039/d1cs00311a] [Citation(s) in RCA: 139] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Photoredox chemistry with organic or transition metal agents has been reviewed in earlier years, but such is the pace of progress that we will overlap very little with earlier comprehensive reviews. This review first presents an overview of the area of research and then examines recent examples of C-C, C-N, C-O and C-S bond formations via radical intermediates with transition metal and organic radical promoters. Recent successes with Birch reductions are also included. The transition metal chemistry will be restricted to photocatalysts based on the most widely used metals, Ru and Ir, but includes coupling chemistries that take advantage of low-valent nickel, or occasionally copper, complexes to process the radicals that are formed. Our focus is on developments in the past 10 years (2011-2021). This period has also seen great advances in the chemistry of organic photoredox reagents and the review covers this area. The review is intended to present highlights and is not comprehensive.
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Affiliation(s)
- Jonathan D Bell
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK.
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49
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Su YL, Dong K, Zheng H, Doyle MP. Generation of Diazomethyl Radicals by Hydrogen Atom Abstraction and Their Cycloaddition with Alkenes. Angew Chem Int Ed Engl 2021; 60:18484-18488. [PMID: 34043866 DOI: 10.1002/anie.202105472] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/23/2021] [Indexed: 12/16/2022]
Abstract
A general catalytic methodology for the synthesis of pyrazolines from α-diazo compounds and conjugated alkenes is reported. The direct hydrogen atom transfer (HAT) process of α-diazo compounds promoted by the tert-butylperoxy radical generates electrophilic diazomethyl radicals, thereby reversing the reactivity of the carbon atom attached with the diazo group. The regiocontrolled addition of diazomethyl radicals to carbon-carbon double bonds followed by intramolecular ring closure on the terminal diazo nitrogen and tautomerization affords a diverse set of pyrazolines in good yields with excellent regioselectivity. This strategy overcomes the limitations of electron-deficient alkenes in traditional dipolar [3+2]-cycloaddition of α-diazo compounds with alkenes. Furthermore, the straightforward formation of the diazomethyl radicals provides umpolung reactivity, thus opening new opportunities for the versatile transformations of diazo compounds.
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Affiliation(s)
- Yong-Liang Su
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Kuiyong Dong
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Haifeng Zheng
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
| | - Michael P Doyle
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA
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50
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Liang S, Wei K, Lin Y, Liu T, Wei D, Han B, Yu W. Visible-Light-Driven Aryl Migration and Cyclization of α-Azido Amides. Org Lett 2021; 23:4527-4531. [PMID: 34042459 DOI: 10.1021/acs.orglett.1c01120] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This paper reports two new visible-light-promoted radical reactions of α-azido amides. By catalysis of [Ir(ppy)2(dtbbpy)]PF6 with i-Pr2NEt as the reducing agent, N-aryl α-azido tertiary amides were first converted to the corresponding aminyl radicals through reduction of the azido group; the aminyl radicals then underwent N-to-N aryl migration to give α-anilinyl-functionalized amides. α-Azido secondary amides, on the other hand, reacted with the solvent ethanol and i-Pr2NEt to afford the imidazolinone products.
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Affiliation(s)
- Siyu Liang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Kaijie Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yajun Lin
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Tuming Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Dian Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Wei Yu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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