1
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Tang Y, Luo WM, Liu BY, Liu Y, Ying J, Xu XT, Peng JB. Intramolecular Cyclopropanation of Alkene-Tethered CF 3-Imidoyl Sulfoxonium Ylides: Synthesis of Cyclopropane-Fused Quinolines. Org Lett 2025. [PMID: 40400084 DOI: 10.1021/acs.orglett.5c01563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2025]
Abstract
A metal-free intramolecular cyclopropanation of CF3-imidoyl sulfoxonium ylides with styrenes was developed, affording cyclopropane-fused quinolines. This strategy provides efficient access to diverse trifluoromethyl-substituted dihydro-1H-cyclopropa[c]quinolines under mild, transition-metal-free conditions. Notably, the sulfoxonium ylide generation and subsequent cyclopropanation could proceed in a one-pot fashion, affording the products in good yields.
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Affiliation(s)
- Ying Tang
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Wen-Mei Luo
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Bao-Yi Liu
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Yi Liu
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Jun Ying
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
- Shengzhou Innovation Research Institute, Zhejiang Sci-Tech University, Shengzhou 312400, China
| | - Xue-Tao Xu
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
| | - Jin-Bao Peng
- School of Pharmacy and Food Engineering, Wuyi University, Jiangmen, Guangdong 529020, P. R. China
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2
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Bertus P, Caillé J. Advances in the Synthesis of Cyclopropylamines. Chem Rev 2025; 125:3242-3377. [PMID: 40048498 DOI: 10.1021/acs.chemrev.4c00674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2025]
Abstract
Cyclopropylamines are an important subclass of substituted cyclopropanes that combine the unique electronic and steric properties of cyclopropanes with the presence of a donor nitrogen atom. In addition to their presence in a diverse array of biologically active compounds, cyclopropylamines are utilized as important synthetic intermediates, particularly in ring-opening or cycloaddition reactions. Consequently, the synthesis of these compounds has constituted a significant research topic, as evidenced by the abundant published synthetic methods. In addition to the widely used Curtius rearrangement, classical cyclopropanation methods have been adapted to integrate a nitrogen function (Simmons-Smith reaction, metal-catalyzed reaction of diazo compounds on olefins, Michael-initiated ring-closure reactions) with significant advances in enantioselective synthesis. More recently, specific methods have been developed for the preparation of the aminocyclopropane moiety (Kulinkovich reactions applied to amides and nitriles, addition to cyclopropenes, metal-catalyzed reactions involving C-H functionalization, ...). The topic of this review is to present the different methods for the preparation of cyclopropylamine derivatives, with the aim of covering the methodological advances as best as possible, highlighting their scope, their stereochemical aspects and future trends.
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Affiliation(s)
- Philippe Bertus
- Institut des Molécules et Matériaux du Mans, IMMM, CNRS UMR 6283, Le Mans Université, 72000 Le Mans, France
| | - Julien Caillé
- Institut de Chimie Organique et Analytique, ICOA, CNRS UMR 7311, University of Orléans, 45100 Orléans, France
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3
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Ueno R, Hirano S, Takaya J. Pyrrolidine synthesis via ring contraction of pyridines. Nat Commun 2025; 16:2426. [PMID: 40082412 PMCID: PMC11906765 DOI: 10.1038/s41467-025-57527-w] [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: 10/09/2024] [Accepted: 02/24/2025] [Indexed: 03/16/2025] Open
Abstract
A ring contraction of easily available cyclic compounds to smaller cycles that are valuable but difficult to synthetically access is one of important skeletal editing strategies. Pyrrolidine synthesis via a ring contraction of pyridines, which are abundant, cheap, and readily available bulk chemicals in chemical industry, is highly promising to accelerate drug discovery and development research due to the great demand of pyrrolidine skeletons in medicinal molecules. Herein we report a photo-promoted ring contraction of pyridines with silylborane to afford pyrrolidine derivatives bearing a 2-azabicyclo[3.1.0]hex-3-ene skeleton. The reaction demonstrates broad substrate scope with high functional group compatibility, realizing facile access to 6-silyl-2-azabicyclo[3.1.0]hex-3-ene derivatives that work as powerful synthons for the synthesis of functionalized pyrrolidines and nitrogen-containing compounds. The reaction mechanism is clarified to proceed via 2-silyl-1,2-dihydropyridine and vinylazomethine ylide as intermediates, which are connected via photochemical or thermal silyl migration.
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Affiliation(s)
- Ryoga Ueno
- Department of Chemistry, School of Science, Tokyo Institute of Technology, Tokyo, Japan
| | - Shohei Hirano
- Department of Chemistry, School of Science, Tokyo Institute of Technology, Tokyo, Japan
| | - Jun Takaya
- Division of Chemistry, Department of Material Engineering Science, Graduate School of Engineering Science, Osaka University, Osaka, Japan.
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4
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Galavskyy S, Chernykh A, Liashuk O, Lesyk D, Shishkina SV, Kliukovskyi D, Volochnyuk DM, Ryabukhin SV, Grygorenko OO. 4-Azaspiro[2.3]hexane, an Overlooked Piperidine Isostere: Multigram Synthesis and Physicochemical and Structural Evaluation. J Org Chem 2024; 89:18477-18486. [PMID: 39589732 DOI: 10.1021/acs.joc.4c02390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2024]
Abstract
An expedient approach to the synthesis of 4-azaspiro[2.3]hexane derivatives is described. The synthetic scheme consists of Tebbe olefination of N-Boc-protected 2-azetidinone (including the first use of the deuterated Petasis reagent Cp2Ti(CD3)2 in the building block preparation) and cyclopropanation of the resulting intermediate. The developed protocols allowed for the preparation of target building blocks on a multigram scale (up to 52 g). To illustrate the potential of the obtained 4-azaspiro[2.3]hexane derivatives for isosteric replacements in drug discovery, their physicochemical and structural characterization was performed, i.e., basicity (pKa) and lipophilicity (Log P) measurements, X-ray diffraction studies, and exit vector plot (EVP) analysis.
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Affiliation(s)
- Sergiy Galavskyy
- Enamine Ltd., Winston Churchill Street 78, Kyïv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyïv 01601, Ukraine
| | - Anton Chernykh
- Enamine Ltd., Winston Churchill Street 78, Kyïv 02094, Ukraine
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Akademik Kukhar Street 5, Kyïv 02660, Ukraine
| | - Oleksandr Liashuk
- Enamine Ltd., Winston Churchill Street 78, Kyïv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyïv 01601, Ukraine
| | - Dmytro Lesyk
- Enamine Ltd., Winston Churchill Street 78, Kyïv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyïv 01601, Ukraine
| | - Svitlana V Shishkina
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Akademik Kukhar Street 5, Kyïv 02660, Ukraine
| | - Denys Kliukovskyi
- Enamine Ltd., Winston Churchill Street 78, Kyïv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyïv 01601, Ukraine
| | - Dmytro M Volochnyuk
- Enamine Ltd., Winston Churchill Street 78, Kyïv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyïv 01601, Ukraine
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Akademik Kukhar Street 5, Kyïv 02660, Ukraine
| | - Serhiy V Ryabukhin
- Enamine Ltd., Winston Churchill Street 78, Kyïv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyïv 01601, Ukraine
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Akademik Kukhar Street 5, Kyïv 02660, Ukraine
| | - Oleksandr O Grygorenko
- Enamine Ltd., Winston Churchill Street 78, Kyïv 02094, Ukraine
- Taras Shevchenko National University of Kyiv, Volodymyrska Street 60, Kyïv 01601, Ukraine
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5
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Tavakoli N, Arvinnezhad H, Majidian S, Mahramasrar M, Jadidi K, Samadi S. Chiral amido-oxazoline functionalized MCM-41: A sustainable heterogeneous catalyst for enantioselective Kharasch-Sosnovsky and Henry reactions. Heliyon 2024; 10:e39911. [PMID: 39553607 PMCID: PMC11565425 DOI: 10.1016/j.heliyon.2024.e39911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 09/21/2024] [Accepted: 10/27/2024] [Indexed: 11/19/2024] Open
Abstract
In this study, a series of chiral amido-oxazoline ligands was synthesized with a primary focus on immobilizing the most effective ligands on MCM-41 mesoporous material. Following several attempts, the para-nitro group of the chiral amido-oxazoline ligands was successfully reduced to amino group, enabling their immobilization on MCM-41. The resulting chiral heterogeneous amido-oxazoline ligands were characterized using various techniques, including FT-IR, XRD, TGA, SEM, TEM, EDX, and BET-BJH, confirming the successful immobilization of the amido-oxazoline ligands. A comparison of the efficiency of the homogeneous and heterogeneous amido-oxazoline-based ligands in the Kharasch-Sosnovsky and Henry reactions revealed better performance of the heterogeneous ligand. The immobilized amido-oxazoline-copper complexes exhibited remarkable catalytic activity, achieving excellent yields and enantioselectivities (up to 88 % ee) in the Kharasch-Sosnovsky reaction, and delivering excellent yields with moderate enantioselectivities in the Henry reaction. Notably, the Henry reaction proceeded with moderate diastereoselectivity, favoring the syn diastereomer, under solvent-free conditions, highlighting the sustainability of the process. The heterogeneous nature of the catalysts facilitated effortless recovery and efficient reusability.
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Affiliation(s)
- Niloofar Tavakoli
- Department of Chemistry, Shahid Beheshti University, G.C., Tehran, 1983963113, Iran
| | - Hamid Arvinnezhad
- Laboratory of Asymmetric Synthesis, Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj, 66177-15175, Iran
| | - Shiva Majidian
- Laboratory of Asymmetric Synthesis, Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj, 66177-15175, Iran
| | - Mahsa Mahramasrar
- Laboratory of Asymmetric Synthesis, Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj, 66177-15175, Iran
| | - Khosrow Jadidi
- Department of Chemistry, Shahid Beheshti University, G.C., Tehran, 1983963113, Iran
| | - Saadi Samadi
- Laboratory of Asymmetric Synthesis, Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj, 66177-15175, Iran
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6
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Shi L, Liu L, Lei X, Wang Y, Fang Y, Jiao P. Dearomative pyrrole (3+2) reaction with geminal bromonitroalkane: synthesis of 2,3-dihydropyrroles. Chem Commun (Camb) 2024; 60:6953-6956. [PMID: 38887875 DOI: 10.1039/d4cc01437e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Dearomative 1,3-dipolar cycloadditions of 1-Boc-pyrroles with in situ generated silver α-bromo alkylidenenitronates delivered a series of 3a,6a-dihydro-4-Boc-pyrrolo[2,3-d]isoxazole-2-oxides (17-91% yields) under very mild conditions. N-Deoxygenation of the cycloaddition product gave a dihydro-pyrrolo[2,3-d]isoxazole, elaborations of which produced various functionalized 2,3-dihydropyrroles and pyrrolidines, showcasing the potential utilities of our new strategy of pyrrole dearomatization.
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Affiliation(s)
- Lin Shi
- College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Lidong Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Xingyu Lei
- College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Yihan Wang
- College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Yeguang Fang
- College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Peng Jiao
- College of Chemistry, Beijing Normal University, Beijing 100875, China.
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7
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Cheng S, Yu T, Li J, Liang Y, Luo S, Zhu Q. Copper/Chiral Phosphoric-Acid-Catalyzed Intramolecular Reductive Isocyanide-Alkene (1 + 2) Cycloaddition: Enantioselective Construction of 2-Azabicyclo[3.1.0]hexanes. J Am Chem Soc 2024; 146:7956-7962. [PMID: 38471146 DOI: 10.1021/jacs.4c00989] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
Enantioenriched 2-azabicyclo[3.1.0]hexanes are accessed from readily available allyl substituted α-isocyanoesters by intramolecular (1 + 2) cycloaddition with the olefinic moiety and isocyano carbon as the respective C2 and C1 units. Cyclopropanation is initiated by 1,1-hydrocupration of isocyanide followed by formimidoylcopper to copper α-aminocarbenoid equilibration and subsequent (1 + 2) cycloaddition. The unprecedented copper/chiral phosphoric acid (CPA) catalytic system can be operated in the presence of water under air, delivering a variety of 2-azabicyclo[3.1.0]hexanes containing an angular all-carbon quaternary stereocenter in good to excellent yields and enantioselectivity.
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Affiliation(s)
- Sidi Cheng
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Ting Yu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Jing Li
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Yingxiang Liang
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Shuang Luo
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
| | - Qiang Zhu
- State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, 190 Kaiyuan Avenue, Guangzhou 510530, China
- University of Chinese Academy of Sciences, No. 19(A) Yuquan Road, Shijingshan District, Beijing 100049, China
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, China
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8
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Lin HZ, Qi Z, Wu QM, Jiang YY, Peng JB. Palladium-catalyzed intramolecular asymmetric hydrocyclopropanylation of alkynes: synthesis of cyclopropane-fused γ-lactams. Chem Sci 2023; 14:7564-7568. [PMID: 37449077 PMCID: PMC10337766 DOI: 10.1039/d3sc02168h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 06/15/2023] [Indexed: 07/18/2023] Open
Abstract
A palladium-catalyzed intramolecular asymmetric hydrocyclopropanylation of alkynes via C(sp3)-H activation has been developed for the synthesis of cyclopropane-fused γ-lactams. The presented strategy proceeds in a selective and 100% atom-economical manner. A range of cyclopropane-fused γ-lactams were prepared from readily available substrates in good yields and enantioselectivities with a chiral phosphoramidite ligand.
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Affiliation(s)
- Han-Ze Lin
- School of Biotechnology and Health Sciences, Wuyi University Jiangmen Guangdong 529020 People's Republic of China
| | - Zhuang Qi
- School of Biotechnology and Health Sciences, Wuyi University Jiangmen Guangdong 529020 People's Republic of China
| | - Qi-Min Wu
- School of Biotechnology and Health Sciences, Wuyi University Jiangmen Guangdong 529020 People's Republic of China
| | - Yong-Yu Jiang
- School of Biotechnology and Health Sciences, Wuyi University Jiangmen Guangdong 529020 People's Republic of China
| | - Jin-Bao Peng
- School of Biotechnology and Health Sciences, Wuyi University Jiangmen Guangdong 529020 People's Republic of China
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9
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Gorantla SMNVT, Mondal K. The Labile Nature of Air Stable Ni(II)/Ni(0)-phosphine/Olefin Catalysts/Intermediates: EDA-NOCV Analysis. Chem Asian J 2022; 17:e202200572. [PMID: 35927965 DOI: 10.1002/asia.202200572] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/28/2022] [Indexed: 11/06/2022]
Abstract
Metal ions-based inorganic-organic hybrid composites are often reported acting as good to excellent catalysts with various substrate scopes under milder reaction conditions. The active catalyst of a catalytic cycle is sometimes proposed to be a short-lived reactive intermediate species. A three coordinate (L-Me)Ni(II) intermediate species [L-Me = O 2 N donor dianionic ligand] can bind with short-lived carbene-ester ligands to produce four coordinate Ni(II) species which can act as carbene transfer intermediates under suitable reaction conditions for C-H functionalization or cyclopropanation reactions. The dissociation of phosphine (PPh 3 ) from the Ni(II) centre of (L-Me)Ni(II)(PPh 3 ) ( 1a ) and binding of short lived carbene esters (:CR 1 -CO 2 R 2 ; R 1 = H, Ph; R 2 = aliphatic group; 2-4 and other carbenes; 5-10 ) to Ni(II) rationalize the phenomenon in solution. Air stable Ni(0)-olefin complexes/intermediates ( 12-18 ) have recently been shown to mediate a variety of organic transformations. This analysis will further help organic/organometallic chemists to rationalize the design and synthesis of future catalysts for organic transformation. EDA-NOCV calculations have been performed to shed light on the stability and bonding of those species. Additionally, our analysis provides a proper reason why the analogous (L-Me)Pd-PPh 3 complex ( 1b ) does not dissociate in solution and hence, a similar catalytic product has not been isolated from identical reaction conditions. The stability and the labile nature of Ni(II/0) complexes has been investigated by state-of-the-art EDA-NOCV analyses.
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Affiliation(s)
| | - Kartik Mondal
- Indiana Institute Of Technology Madras, Chemistry, Department of Chemistry, IIT Madras, 600036, Chennai, INDIA
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10
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Kurose T, Itoga M, Nanjo T, Takemoto Y, Tsukano C. Total Synthesis of Lyconesidine B: Approach to a Three-Dimensional Tetracyclic Skeleton of Amine-Type Fawcettimine Core and Studies of Asymmetric Synthesis. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tomohiro Kurose
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501
| | - Moeko Itoga
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501
| | - Takeshi Nanjo
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501
| | - Yoshiji Takemoto
- Graduate School of Pharmaceutical Sciences, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501
| | - Chihiro Tsukano
- Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502
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11
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Enantioselective Allylic C-H Bond Oxidation of Olefins Using Copper Complexes of Chiral Oxazoline Based Ligands. Top Curr Chem (Cham) 2022; 380:20. [PMID: 35274165 DOI: 10.1007/s41061-022-00375-9] [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: 09/28/2021] [Accepted: 02/10/2022] [Indexed: 10/18/2022]
Abstract
This review article discusses historical and contemporary research studies of asymmetric allylic oxidation of olefins using homogeneous and heterogeneous copper complexes of various kinds of oxazoline-based ligands, until the end of 2021. It is revealed that this strategy is a powerful method to form a new stereogenic center bearing an oxygen substituent adjacent to an unchanged C=C bond. Enantioselectivities as well as chemical yields, and also the reactivity, are strongly dependent on the type of substrate, oxidant, the copper salt and its oxidation state, ligand structure, temperature, nature of the solvent, and additives such as phenylhydrazine and porous materials.
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12
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Su J, Li Q, Shao Y, Sun J. Catalytic Transformations of 2-Pyridones by Rhodium-Mediated Carbene Transfer. Org Lett 2022; 24:1637-1641. [PMID: 35191701 DOI: 10.1021/acs.orglett.2c00151] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
An enantioselective cyclopropanation reaction of N-substituted 2-pyridones with diazo compounds has been realized by using a chiral rhodium complex as the catalyst, and the corresponding chiral cyclopropanes could be formed in good yields with high enantioselectivities. Moreover, using acceptor-acceptor dimethyl 2-diazomalonate as the carbene precursor, a novel 1,4-rearrangement of a Boc group from N to C has also been discovered under rhodium catalysis.
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Affiliation(s)
- Jiahui Su
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Qiongya Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Ying Shao
- 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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13
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Jana SK, Maiti M, Dey P, Maji B. Photoredox/Nickel Dual Catalysis Enables the Synthesis of Alkyl Cyclopropanes via C(sp 3)-C(sp 3) Cross Electrophile Coupling of Unactivated Alkyl Electrophiles. Org Lett 2022; 24:1298-1302. [PMID: 35133153 DOI: 10.1021/acs.orglett.1c04268] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A facile synthesis of mono-, 1,1- and 1,2-disubstituted cyclopropanes via visible light-mediated photoredox/nickel dual catalysis is demonstrated. The challenging intramolecular C(sp3)-C(sp3) cross-electrophile coupling of readily available unactivated 1,3-dialkyl electrophiles was performed under mild conditions that allowed traditionally reactive functional groups to be included. Mechanistic inspection and control experiments revealed the importance of dual catalysis and that the reaction proceeds via a stepwise oxidative addition followed by an intramolecular SN2 reaction.
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Affiliation(s)
- Sayan K Jana
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Mamata Maiti
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Purusattam Dey
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Biplab Maji
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
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14
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Eckl R, Fischer S, Sonnleitner CM, Schmidhuber D, Rehbein J, Reiser O. Stereoselective Synthesis of Biologically Relevant Tetrahydropyridines and Dihydro-2 H-pyrans via Ring-Expansion of Monocyclopropanated Heterocycles. ACS ORGANIC & INORGANIC AU 2021; 2:169-174. [PMID: 36855453 PMCID: PMC9954292 DOI: 10.1021/acsorginorgau.1c00042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A stereoselective, scalable, and metal-free ring-expansion of monocyclopropanated pyrroles and furans has been developed, leading to value-added highly functionalized tetrahydropyridine and dihydro-2H-pyran derivatives. Featuring a cyclopropylcarbinyl cation rearrangement as the key step, the selective cleavage of the unactivated endocyclic cyclopropane C-C bond is achieved. Targeted transformations of the thus obtained six-membered heterocycles give access to versatile building blocks with relevance for drug synthesis.
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15
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Connon R, Roche B, Rokade BV, Guiry PJ. Further Developments and Applications of Oxazoline-Containing Ligands in Asymmetric Catalysis. Chem Rev 2021; 121:6373-6521. [PMID: 34019404 PMCID: PMC8277118 DOI: 10.1021/acs.chemrev.0c00844] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Indexed: 12/27/2022]
Abstract
The chiral oxazoline motif is present in many ligands that have been extensively applied in a series of important metal-catalyzed enantioselective reactions. This Review aims to provide a comprehensive overview of the most significant applications of oxazoline-containing ligands reported in the literature starting from 2009 until the end of 2018. The ligands are classified not by the reaction to which their metal complexes have been applied but by the nature of the denticity, chirality, and donor atoms involved. As a result, the continued development of ligand architectural design from mono(oxazolines), to bis(oxazolines), to tris(oxazolines) and tetra(oxazolines) and variations thereof can be more easily monitored by the reader. In addition, the key transition states of selected asymmetric transformations will be given to illustrate the features that give rise to high levels of asymmetric induction. As a further aid to the reader, we summarize the majority of schemes with representative examples that highlight the variation in % yields and % ees for carefully selected substrates. This Review should be of particular interest to the experts in the field but also serve as a useful starting point to new researchers in this area. It is hoped that this Review will stimulate both the development/design of new ligands and their applications in novel metal-catalyzed asymmetric transformations.
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Affiliation(s)
- Robert Connon
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
| | - Brendan Roche
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
| | - Balaji V. Rokade
- BiOrbic
Research Centre, Centre for Synthesis and Chemical Biology, School
of Chemistry, University College Dublin, Dublin 4, Ireland
| | - Patrick J. Guiry
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
- BiOrbic
Research Centre, Centre for Synthesis and Chemical Biology, School
of Chemistry, University College Dublin, Dublin 4, Ireland
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16
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Hunjan MK, Panday S, Gupta A, Bhaumik J, Das P, Laha JK. Recent Advances in Functionalization of Pyrroles and their Translational Potential. CHEM REC 2021; 21:715-780. [PMID: 33650751 DOI: 10.1002/tcr.202100010] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 12/25/2022]
Abstract
Among the known aromatic nitrogen heterocycles, pyrrole represents a privileged aromatic heterocycle ranging its occurrence in the key component of "pigments of life" to biologically active natural products to active pharmaceuticals. Pyrrole being an electron-rich heteroaromatic compound, its predominant functionalization is legendary to aromatic electrophilic substitution reactions. Although a few excellent reviews on the functionalization of pyrroles including the reports by Baltazzi in 1963, Casiraghi and Rassu in 1995, and Banwell in 2006 are available, they are fragmentary and over fifteen years old, and do not cover the modern aspects of catalysis. A review covering a comprehensive package of direct functionalization on pyrroles via catalytic and non-catalytic methods including their translational potential is described. Subsequent to statutory yet concise introduction, the classical functionalization on pyrroles using Lewis acids largely following an ionic mechanism is discussed. The subsequent discussion follows the various metal-catalyzed C-H functionalization on pyrroles, which are otherwise difficult to implement by Lewis acids. A major emphasize is given on the radical based pyrrole functionalization under metal-free oxidative conditions, which is otherwise poorly highlighted in the literature. Towards the end, the current development of pyrrole functionalization under photocatalyzed and electrochemical conditions is appended. Only a selected examples of substrates and important mechanisms are discussed for different methods highlighting their scopes and limitations. The aromatic nucleophillic substitution on pyrroles (being an electron-rich heterocycle) happened to be the subject of recent investigations, which has also been covered accentuating their underlying conceptual development. Despite great achievements over the past several years in these areas, many challenges and problems are yet to be solved, which are all discussed in summary and outlook.
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Affiliation(s)
- Mandeep Kaur Hunjan
- Department of Pharmaceutial Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, Mohali, 160062, India
| | - Surabhi Panday
- Department of Pharmaceutial Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, Mohali, 160062, India
| | - Anjali Gupta
- Department of Pharmaceutial Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, Mohali, 160062, India
| | - Jayeeta Bhaumik
- Center of Innovative and Applied Bioprocessing (CIAB), Department of Biotechnology (DBT), Government of India, Sector 81 (Knowledge City), S.A.S., Nagar, 140306, Punjab, India
| | - Parthasarathi Das
- Department of Chemistry, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad, 826004, India
| | - Joydev K Laha
- Department of Pharmaceutial Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, Mohali, 160062, India
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17
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Hosseini SJ, Emamian S, Hassani H, Hamzehzadeh ND. Stereoselective Cyclopropanation of
Arylmethylidenemalononitriles by 2,6-Dimethylquinoline: A Molecular Electron Density
Theory Study. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1070428020120209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Kushvaha SK, Francis M, Kumar J, Nag E, Ravichandran P, Roy S, Chandra Mondal K. Synthesis, oligomerization and catalytic studies of a redox-active Ni 4-cubane: a detailed mechanistic investigation. RSC Adv 2021; 11:22849-22858. [PMID: 35480420 PMCID: PMC9034354 DOI: 10.1039/d1ra03071j] [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: 04/20/2021] [Accepted: 06/23/2021] [Indexed: 11/21/2022] Open
Abstract
A robust tetrameric nickel complex [Ni4((Oal−)2L-Me)4(s)4] (3) (s = solvent) with cubane-like Ni4O4 core topology was isolated as a light greenish-orange crystalline solid in excellent yield. The mechanism of formation of 3 involving the two chloride-containing precursors [Ni4((Oal−)2L-Me)4(s)4]·2MeOH (1) and [Ni4((O−)2L-Me)3((Oal−)(OH)L-Me)Cl] (2) was studied by ESI mass spectrometry and confirmed by the solid state isolation and single-crystal X-ray diffraction. The challenging ligand fields containing mono/di-anionic O2N donating atoms and/or chloride ions stabilized the pentacoordinate Ni(ii) ions in 1–2 upon controlling the experimental conditions. Complexes 1–3 have been characterized by NMR, UV-Vis and mass spectrometric analysis. Complex 3 was found to be redox active by cyclic voltammetry (CV) studies. Theoretical calculations were carried out to shed light on the effects of ligand fields on the stability of complexes 1–3. Complex 3 was found to be a potential catalyst for the diastereoselective cyclopropanation of heteroarenes with good to excellent yields. The ESI mass spectrometric analysis revealed the existence of solution dynamics and oligomerization of 3 in solution. Mechanistic investigation of the catalytic cycle revealed that complex 3 and its various oligomers bind to the diazoester employed, followed by dissociative insertion of the respective carbene moieties to the C2–C3 double bond of the involved aromatic heterocycle, leading to the diastereoselective cyclopropanation. A robust tetrameric nickel complex [Ni4((Oal−)2L-Me)4(s)4] (s = solvent) with cubane-like Ni4O4 core topology identified as the efficient catalyst for the diastereoselective cyclopropanation of aromatic heterocycles.![]()
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Affiliation(s)
| | - Maria Francis
- Department of Chemistry
- Indian Institute of Science Education and Research (IISER)
- Tirupati 517507
- India
| | - Jayasree Kumar
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600036
- India
| | - Ekta Nag
- Department of Chemistry
- Indian Institute of Science Education and Research (IISER)
- Tirupati 517507
- India
| | | | - Sudipta Roy
- Department of Chemistry
- Indian Institute of Science Education and Research (IISER)
- Tirupati 517507
- India
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19
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Sonnleitner CM, Park S, Eckl R, Ertl T, Reiser O. Stereoselective Synthesis of Tropanes via a 6π-Electrocyclic Ring-Opening/ Huisgen [3+2]-Cycloaddition Cascade of Monocyclopropanated Heterocycles. Angew Chem Int Ed Engl 2020; 59:18110-18115. [PMID: 32627302 PMCID: PMC7589232 DOI: 10.1002/anie.202006030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Indexed: 12/18/2022]
Abstract
The synthesis of tropanes via a microwave-assisted, stereoselective 6π-electrocyclic ring-opening/ Huisgen [3+2]-cycloaddition cascade of cyclopropanated pyrrole and furan derivatives with electron-deficient dipolarophiles is demonstrated. Starting from furans or pyrroles, 8-aza- and 8-oxabicyclo[3.2.1]octanes are accessible in two steps in dia- and enantioselective pure form, being versatile building blocks for the synthesis of pharmaceutically relevant targets, especially for new cocaine analogues bearing various substituents at the C-6/C-7 positions of the tropane ring system. Moreover, the 2-azabicyclo[2.2.2]octane core (isoquinuclidines), being prominently represented in many natural and pharmaceutical products, is accessible via this approach.
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Affiliation(s)
- Carina M. Sonnleitner
- Institut für Organische ChemieUniversität RegensburgUniversitätsstrasse 3193053RegensburgGermany
| | - Saerom Park
- Institut für Organische ChemieUniversität RegensburgUniversitätsstrasse 3193053RegensburgGermany
| | - Robert Eckl
- Institut für Organische ChemieUniversität RegensburgUniversitätsstrasse 3193053RegensburgGermany
| | - Thomas Ertl
- Institut für Organische ChemieUniversität RegensburgUniversitätsstrasse 3193053RegensburgGermany
| | - Oliver Reiser
- Institut für Organische ChemieUniversität RegensburgUniversitätsstrasse 3193053RegensburgGermany
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20
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Sonnleitner CM, Park S, Eckl R, Ertl T, Reiser O. Stereoselektive Synthese von Tropanen über eine 6π‐elektrocyclische Ringöffnung/ Huisgen‐[3+2]‐Cycloadditionskaskade von monocyclopropanierten Heterocyclen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Carina M. Sonnleitner
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Deutschland
| | - Saerom Park
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Deutschland
| | - Robert Eckl
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Deutschland
| | - Thomas Ertl
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Deutschland
| | - Oliver Reiser
- Institut für Organische Chemie Universität Regensburg Universitätsstr. 31 93053 Regensburg Deutschland
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21
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Pirovano V, Caselli A, Colombo A, Dragonetti C, Giannangeli M, Rossi E, Brambilla E. Synthesis of 2‐alkenylidene‐3‐oxoindolines: cascade reactions of 4
H
‐furo [3,2‐
b
]indoles with diazoacetates catalyzed by a Cu(I) macrocyclic pyridine‐containing ligand (PcL) complex. ChemCatChem 2020. [DOI: 10.1002/cctc.202000887] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Valentina Pirovano
- Dipartimento di Scienze Farmaceutiche – Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian 21 20133 Milano Italy
| | - Alessandro Caselli
- Dipartimento di Chimica and CNR-SCITEC Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Alessia Colombo
- Dipartimento di Chimica and CNR-SCITEC Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Claudia Dragonetti
- Dipartimento di Chimica and CNR-SCITEC Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Matteo Giannangeli
- Dipartimento di Chimica and CNR-SCITEC Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Elisabetta Rossi
- Dipartimento di Scienze Farmaceutiche – Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian 21 20133 Milano Italy
| | - Elisa Brambilla
- Dipartimento di Scienze Farmaceutiche – Sezione di Chimica Generale e Organica “A. Marchesini” Università degli Studi di Milano Via Venezian 21 20133 Milano Italy
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22
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Samadi S, Ashouri A, Samadi M. Synthesis of Chiral Allylic Esters by Using the New Recyclable Chiral Heterogeneous Oxazoline-Based Catalysts. ACS OMEGA 2020; 5:22367-22378. [PMID: 32923794 PMCID: PMC7482298 DOI: 10.1021/acsomega.0c02764] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
A new class of recyclable supported chiral heterogeneous ligands has been synthesized by the reaction of functionalized mesoporous SBA-15 with aliphatic- and aromatic-substituted chiral amino oxazoline ligands. The obtained chiral heterogeneous ligands were characterized by several techniques such as Fourier transform infrared, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and BET-BJH. The application of these new heterogeneous ligands in copper-catalyzed asymmetric allylic oxidation of olefins by using perester showed better yields up to 95% and better enantioselectivities up to 96% compared to the corresponding homogeneous catalysts. These findings can be considered as an important step in the advancement of green chemistry. Investigation of the recyclability of the catalysts confirmed that they were easily recovered and reused eight times without significant losses in reactivity, yield, and enantioselectivity.
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Affiliation(s)
- Saadi Samadi
- Laboratory of Asymmetric Synthesis,
Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj 66177-15175, Iran
| | - Akram Ashouri
- Laboratory of Asymmetric Synthesis,
Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj 66177-15175, Iran
| | - Mojgan Samadi
- Laboratory of Asymmetric Synthesis,
Department of Chemistry, Faculty of Science, University of Kurdistan, Sanandaj 66177-15175, Iran
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23
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Nag E, Gorantla SMNVT, Arumugam S, Kulkarni A, Mondal KC, Roy S. Tridentate Nickel(II)-Catalyzed Chemodivergent C-H Functionalization and Cyclopropanation: Regioselective and Diastereoselective Access to Substituted Aromatic Heterocycles. Org Lett 2020; 22:6313-6318. [PMID: 32806181 DOI: 10.1021/acs.orglett.0c02138] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A Schiff-base nickel(II)-phosphene-catalyzed chemodivergent C-H functionalization and cyclopropanation of aromatic heterocycles is reported in moderate to excellent yields and very good regioselectivity and diastereoselectivity. The weak, noncovalent interaction between the phosphene ligand and Ni center facilitates the ligand dissociation, generating the electronically and coordinatively unsaturated active catalyst. The proposed mechanisms for the reported reactions are in good accord with the experimental results and theoretical calculations, providing a suitable model of stereocontrol for the cyclopropanation reaction.
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Affiliation(s)
- Ekta Nag
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Tirupati 517507, India
| | | | - Selvakumar Arumugam
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Aditya Kulkarni
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Tirupati 517507, India
| | - Kartik Chandra Mondal
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Sudipta Roy
- Department of Chemistry, Indian Institute of Science Education and Research (IISER), Tirupati 517507, India
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24
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Sokolova OO, Bower JF. Selective Carbon–Carbon Bond Cleavage of Cyclopropylamine Derivatives. Chem Rev 2020; 121:80-109. [DOI: 10.1021/acs.chemrev.0c00166] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Olga O. Sokolova
- School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
| | - John F. Bower
- School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom
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25
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Chen L, He J. DABCO-Catalyzed Michael/Alkylation Cascade Reactions Involving α-Substituted Ammonium Ylides for the Construction of Spirocyclopropyl Oxindoles: Access to the Powerful Chemical Leads against HIV-1. J Org Chem 2020; 85:5203-5219. [DOI: 10.1021/acs.joc.9b03164] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Lin Chen
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, China
| | - Jin He
- School of Chemistry and Materials Science, Guizhou Normal University, Guiyang 550001, China
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26
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Liu W, Babl T, Röther A, Reiser O, Davies HML. Functionalization of Piperidine Derivatives for the Site-Selective and Stereoselective Synthesis of Positional Analogues of Methylphenidate. Chemistry 2020; 26:4236-4241. [PMID: 31873946 PMCID: PMC7187323 DOI: 10.1002/chem.201905773] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Indexed: 12/13/2022]
Abstract
Rhodium‐catalyzed C−H insertions and cyclopropanations of donor/acceptor carbenes have been used for the synthesis of positional analogues of methylphenidate. The site selectivity is controlled by the catalyst and the amine protecting group. C−H functionalization of N‐Boc‐piperidine using Rh2(R‐TCPTAD)4, or N‐brosyl‐piperidine using Rh2(R‐TPPTTL)4 generated 2‐substitited analogues. In contrast, when N‐α‐oxoarylacetyl‐piperidines were used in combination with Rh2(S‐2‐Cl‐5‐BrTPCP)4, the C−H functionalization produced 4‐susbstiuted analogues. Finally, the 3‐substituted analogues were prepared indirectly by cyclopropanation of N‐Boc‐tetrahydropyridine followed by reductive regio‐ and stereoselective ring‐opening of the cyclopropanes.
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Affiliation(s)
- Wenbin Liu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, 30322, USA
| | - Tobias Babl
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, 30322, USA.,Institute of Organic Chemistry, University of Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Alexander Röther
- Institute of Organic Chemistry, University of Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Oliver Reiser
- Institute of Organic Chemistry, University of Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Huw M L Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, 30322, USA
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27
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Rodríguez AM, Molina F, Díaz‐Requejo MM, Pérez PJ. Copper‐Catalyzed Selective Pyrrole Functionalization by Carbene Transfer Reaction. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901629] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Anabel M. Rodríguez
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva Campus de El Carmen s/n 21007- Huelva Spain
| | - Francisco Molina
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva Campus de El Carmen s/n 21007- Huelva Spain
| | - M. Mar Díaz‐Requejo
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva Campus de El Carmen s/n 21007- Huelva Spain
| | - Pedro J. Pérez
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva Campus de El Carmen s/n 21007- Huelva Spain
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28
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Werz DB, Biju AT. Uncovering the Neglected Similarities of Arynes and Donor-Acceptor Cyclopropanes. Angew Chem Int Ed Engl 2020; 59:3385-3398. [PMID: 31529661 PMCID: PMC7065169 DOI: 10.1002/anie.201909213] [Citation(s) in RCA: 183] [Impact Index Per Article: 36.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Indexed: 12/21/2022]
Abstract
Arynes and donor-acceptor (D-A) cyclopropanes are two classes of strained systems having the potential for numerous applications in organic synthesis. The last two decades have witnessed a renaissance of interest in the chemistry of these species primarily because of the mild and robust methods for their generation or activation. Commonly, arynes as easily polarizable systems result in 1,2-disubstitution, whereas D-A cyclopropanes as polarized systems lead to 1,3-bisfunctionalization thereby showing striking similarities. Transformations with 1,2- and 1,3-dipoles afford cyclic structures. With arynes, emerging four-membered rings as intermediates might react further, whereas the analogous five-membered rings obtained from D-A cyclopropanes are most often the final products. However, there are a few cases where these intermediates behave surprisingly differently. This Minireview highlights the parallels in reactivity between arynes and D-A cyclopropanes thereby shedding light on the neglected similarities of these two reactive species.
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Affiliation(s)
- Daniel B. Werz
- Technische Universität BraunschweigInstitut für Organische ChemieHagenring 3038106BraunschweigGermany
| | - Akkattu T. Biju
- Department of Organic ChemistryIndian Institute of ScienceBangalore560012India
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29
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Zhou Y, Xue R, Feng Y, Zhang L. How does HOTf/HFIP Cooperative System Catalyze the Ring‐Opening Reaction of Cyclopropanes? A DFT Study. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000031] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yongzhu Zhou
- Tianjin Engineering Technology Center of Chemical Wastewater Source Reduction and Recycling School of ScienceTianjin Chengjian University Tianjin 300384 P. R. of China
- School of Chemical Engineering and TechnologyTianjin University Tianjin 300072 P. R. China
| | - Rong‐Chao Xue
- Tianjin Engineering Technology Center of Chemical Wastewater Source Reduction and Recycling School of ScienceTianjin Chengjian University Tianjin 300384 P. R. of China
| | - Yaqing Feng
- School of Chemical Engineering and TechnologyTianjin University Tianjin 300072 P. R. China
| | - Lei Zhang
- Tianjin Engineering Technology Center of Chemical Wastewater Source Reduction and Recycling School of ScienceTianjin Chengjian University Tianjin 300384 P. R. of China
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30
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Werz DB, Biju AT. Über bislang nicht beachtete Parallelen in der Reaktivität von Arinen und Donor‐Akzeptor‐Cyclopropanen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909213] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Daniel B. Werz
- Technische Universität BraunschweigInstitut für Organische Chemie Hagenring 30 38106 Braunschweig Deutschland
| | - Akkattu T. Biju
- Department of Organic ChemistryIndian Institute of Science Bangalore 560012 Indien
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31
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Mishra M, De PB, Pradhan S, Punniyamurthy T. Stereospecific Copper(II)-Catalyzed Tandem Ring Opening/Oxidative Alkylation of Donor-Acceptor Cyclopropanes with Hydrazones: Synthesis of Tetrahydropyridazines. J Org Chem 2019; 84:10901-10910. [PMID: 31385502 DOI: 10.1021/acs.joc.9b01506] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Aerobic copper(II)-catalyzed tandem ring opening and oxidative C-H alkylation of donor-acceptor cyclopropanes with bisaryl hydrazones is accomplished to produce tetrahydropyridazines, in which copper(II) plays dual role as a Lewis acid as well as redox catalyst. The reaction is stereospecific, and optically active cyclopropanes can be reacted with high optical purities (89-98% enantiomeric excess). The substrate scope, functional group tolerance, dual role of the copper(II) catalyst, and the use of air as an oxidant are the important practical features. A product bearing a 3-bromoaryl group can be subjected to Pd-catalyzed Suzuki coupling with boronic acid in high yield.
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Affiliation(s)
- Manmath Mishra
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Pinaki Bhusan De
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
| | - Sourav Pradhan
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , India
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Kreft A, Ehlers S, Jones PG, Werz DB. Ring-Opening Reactions of Donor-Acceptor Cyclobutanes with Electron-Rich Arenes, Thiols, and Selenols. Org Lett 2019; 21:6315-6319. [PMID: 31380647 DOI: 10.1021/acs.orglett.9b02197] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Donor-acceptor (D-A) cyclobutanes with two geminal ester groups as acceptors are reacted with electron-rich arenes as nucleophiles to afford ring-opened products. AlCl3 mediates this Friedel-Crafts-type reaction. A variety of donors and electron-rich arenes are used. Nucleophilic thiols and selenols also trigger this ring-opening reaction. Furthermore, a comparison of various physical parameters has been carried out for several D-A cyclobutanes.
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Fu J, Wurzer N, Lehner V, Reiser O, Davies HML. Rh(II)-Catalyzed Monocyclopropanation of Pyrroles and Its Application to the Synthesis Pharmaceutically Relevant Compounds. Org Lett 2019; 21:6102-6106. [DOI: 10.1021/acs.orglett.9b02250] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jiantao Fu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Nikolai Wurzer
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
- Institute of Organic Chemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Verena Lehner
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
- Institute of Organic Chemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Oliver Reiser
- Institute of Organic Chemistry, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Huw M. L. Davies
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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Petzold M, Jones PG, Werz DB. (3+3)‐Annulation of Carbonyl Ylides with Donor–Acceptor Cyclopropanes: Synergistic Dirhodium(II) and Lewis Acid Catalysis. Angew Chem Int Ed Engl 2019; 58:6225-6229. [DOI: 10.1002/anie.201814409] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/18/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Martin Petzold
- Technische Universität BraunschweigInstitute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Peter G. Jones
- Technische Universität BraunschweigInstitute of Inorganic and Analytical Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Technische Universität BraunschweigInstitute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
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Petzold M, Jones PG, Werz DB. (3+3)‐Annulation of Carbonyl Ylides with Donor–Acceptor Cyclopropanes: Synergistic Dirhodium(II) and Lewis Acid Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814409] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Martin Petzold
- Technische Universität BraunschweigInstitute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Peter G. Jones
- Technische Universität BraunschweigInstitute of Inorganic and Analytical Chemistry Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Technische Universität BraunschweigInstitute of Organic Chemistry Hagenring 30 38106 Braunschweig Germany
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Abstract
Cyclopropanes, one of the most important strained rings, have gained much attention for more than a century because of their interesting and unique reactivity. They not only exist in many natural products, but have also been widely used in the fields of organic synthesis, medicinal chemistry and materials science as versatile building blocks. Based on the sustainable development in this area, this review mainly focuses on the recent advances in the synthesis of cyclopropanes classified by the type of catalytic system, including regio-, diastereo-, and enantio-selective reactions.
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Affiliation(s)
- Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, Guangdong Engineering Research Center for Green Fine Chemicals, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China.
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Yedoyan J, Wurzer N, Klimczak U, Ertl T, Reiser O. Regio- und stereoselektive Synthese von funktionalisierten Dihydropyridinen, Pyridinen und 2H
-Pyranen: Heck-Kupplung an monocyclopropanierten Heterocyclen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813716] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Julietta Yedoyan
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Nikolai Wurzer
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Urszula Klimczak
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Thomas Ertl
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Oliver Reiser
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
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38
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Yedoyan J, Wurzer N, Klimczak U, Ertl T, Reiser O. Regio- and Stereoselective Synthesis of Functionalized Dihydropyridines, Pyridines, and 2H-Pyrans: Heck Coupling of Monocyclopropanated Heterocycles. Angew Chem Int Ed Engl 2019; 58:3594-3598. [PMID: 30629786 DOI: 10.1002/anie.201813716] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 01/02/2019] [Indexed: 12/18/2022]
Abstract
A palladium-catalyzed coupling between aryl halides and monocyclopropanated pyrroles or furans has been developed, leading to valuable six-membered N- and O-heterocycles. As the key step, a selective cleavage of the non-activated endocyclic C-C bond of the 2-heterobicyclo-[3.1.0]hexane framework is achieved. The developed method offers access to highly functionalized piperidines, pyridines, and pyrans that are challenging to access by traditional methods.
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Affiliation(s)
- Julietta Yedoyan
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053, Regensburg, Deutschland
| | - Nikolai Wurzer
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053, Regensburg, Deutschland
| | - Urszula Klimczak
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053, Regensburg, Deutschland
| | - Thomas Ertl
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053, Regensburg, Deutschland
| | - Oliver Reiser
- Institut für Organische Chemie, Universität Regensburg, Universitätsstr. 31, 93053, Regensburg, Deutschland
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39
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Designing chiral amido-oxazolines as new chelating ligands devoted to direct Cu-catalyzed oxidation of allylic C H bonds in cyclic olefins. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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40
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Lücht A, Kreft A, Grunenberg J, Jones PG, Werz DB. Kinetische Studie zu Donor-Akzeptor-Cyclopropanen: Strukturelle und elektronische Einflüsse auf die Reaktivität. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812880] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Alexander Lücht
- Technische Universität Braunschweig; Institut für Organische Chemie; Hagenring 30 38106 Braunschweig Deutschland
| | - Alexander Kreft
- Technische Universität Braunschweig; Institut für Organische Chemie; Hagenring 30 38106 Braunschweig Deutschland
| | - Jörg Grunenberg
- Technische Universität Braunschweig; Institut für Organische Chemie; Hagenring 30 38106 Braunschweig Deutschland
| | - Peter G. Jones
- Technische Universität Braunschweig; Institut für Anorganische und Analytische Chemie; Hagenring 30 38106 Braunschweig Deutschland
| | - Daniel B. Werz
- Technische Universität Braunschweig; Institut für Organische Chemie; Hagenring 30 38106 Braunschweig Deutschland
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41
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Kreft A, Lücht A, Grunenberg J, Jones PG, Werz DB. Kinetic Studies of Donor-Acceptor Cyclopropanes: The Influence of Structural and Electronic Properties on the Reactivity. Angew Chem Int Ed Engl 2019; 58:1955-1959. [DOI: 10.1002/anie.201812880] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 11/27/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Alexander Kreft
- Technische Universität Braunschweig; Institut für Organische Chemie; Hagenring 30 38106 Braunschweig Germany
| | - Alexander Lücht
- Technische Universität Braunschweig; Institut für Organische Chemie; Hagenring 30 38106 Braunschweig Germany
| | - Jörg Grunenberg
- Technische Universität Braunschweig; Institut für Organische Chemie; Hagenring 30 38106 Braunschweig Germany
| | - Peter G. Jones
- Technische Universität Braunschweig; Institut für Anorganische und Analytische Chemie; Hagenring 30 38106 Braunschweig Germany
| | - Daniel B. Werz
- Technische Universität Braunschweig; Institut für Organische Chemie; Hagenring 30 38106 Braunschweig Germany
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42
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Tröster A, Bach T. Triplet-sensitised di-π-methane rearrangement of N-substituted 2-azabarrelenones. Chem Commun (Camb) 2019; 55:302-305. [PMID: 30516181 DOI: 10.1039/c8cc08704k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
When irradiated at λ = 366 nm or at λ = 420 nm in the presence of an appropriate sensitiser the title compounds underwent a di-π-methane rearrangement which led to the formation of tricyclic azasemibullvalenones (2a,2a1,2b,4a-tetrahydroazacyclopropa[cd]pentalenones) in yields of 63-87%.
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Affiliation(s)
- Andreas Tröster
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, 85747 Garching, Germany.
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43
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Hyde AM, Ashley ER. Organometallic Approaches to [3.1.0] Bicycles in Process Chemistry. TOP ORGANOMETAL CHEM 2019. [DOI: 10.1007/3418_2019_30] [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]
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44
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2017. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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45
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Li YP, Li ZQ, Zhu SF. Recent advances in transition-metal-catalyzed asymmetric reactions of diazo compounds with electron-rich (hetero-) arenes. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.04.055] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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46
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Saha A, Bhattacharyya A, Talukdar R, Ghorai MK. Stereospecific Syntheses of Enaminonitriles and β-Enaminoesters via Domino Ring-Opening Cyclization (DROC) of Activated Cyclopropanes with Pronucleophilic Malononitriles. J Org Chem 2018; 83:2131-2144. [DOI: 10.1021/acs.joc.7b03033] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Amrita Saha
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | | | - Ranadeep Talukdar
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Manas K. Ghorai
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
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47
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Chu ZY, Li N, Liang D, Li ZH, Zheng YS, Liu JK. Accessing substituted pyrrolidines via formal [3+2] cycloaddition of 1,3,5-triazinanes and donor-acceptor cyclopropanes. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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48
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Pirovano V, Brambilla E, Tseberlidis G. [Copper(I)(Pyridine-Containing Ligand)] Catalyzed Regio- and Steroselective Synthesis of 2-Vinylcyclopropa[b]indolines from 2-Vinylindoles. Org Lett 2018; 20:405-408. [DOI: 10.1021/acs.orglett.7b03704] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Valentina Pirovano
- Dipartimento
di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica “A.
Marchesini”, Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Elisa Brambilla
- Dipartimento
di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica “A.
Marchesini”, Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Giorgio Tseberlidis
- Dipartimento
di Chimica, Università degli Studi di Milano, Via Golgi
19, 20133, Milano, Italy
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49
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Abstract
Cyclopropanes have gained much attention by virtue of their interesting structure and unique reactivity. This review discusses the recent advances in the synthesis of cyclopropanes, and some of the related applications will be discussed.
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Affiliation(s)
- Wanqing Wu
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- Guangdong Engineering Research Center for Green Fine Chemicals
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
| | - Zhiming Lin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- Guangdong Engineering Research Center for Green Fine Chemicals
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong Province
- Guangdong Engineering Research Center for Green Fine Chemicals
- School of Chemistry and Chemical Engineering
- South China University of Technology
- Guangzhou 510640
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50
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Shen HQ, Liu C, Zhou J, Zhou YG. Enantioselective palladium-catalyzed C–H functionalization of pyrroles using an axially chiral 2,2′-bipyridine ligand. Org Chem Front 2018. [DOI: 10.1039/c7qo00815e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An enantioselective palladium-catalyzed C–H functionalization of pyrroles with diazoacetates has been developed with up to 90% of enantioselectivity.
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Affiliation(s)
- Hong-Qiang Shen
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Cong Liu
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Ji Zhou
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
| | - Yong-Gui Zhou
- State Key Laboratory of Catalysis
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- P. R. China
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