1
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Chau TK, Ho NT, Ho TH, Nguyen AT, Nguyen KD, Phan NTS, Le HV, Nguyen TT. Synthesis of 2-benzyl benzoxazoles and benzothiazoles via elemental sulfur promoted cyclization of styrenes with 2-nitrophenols and N, N-dialkyl-3-nitroanilines. Org Biomol Chem 2024; 22:1234-1244. [PMID: 38240351 DOI: 10.1039/d3ob01775c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Herein we report a method for affording 2-benzyl benzoxazoles from substituted styrenes and 2-nitrophenols. The success of this method relies on the use of simple reagents, namely elemental sulfur and DABCO. A combination of identical reagents was utilized for the annulation of styrenes with N,N-dialkyl-3-nitroanilines to afford 2-benzyl benzothiazoles. Overall, benzoxazoles and benzothiazoles bearing useful functionalities such as halogens, amines, and heterocyclic groups were isolated in moderate to good yields. Our methods are a rare example of divergent transformations of substituted nitroarenes towards 2-benzyl benzoxazoles and benzothiazoles.
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Affiliation(s)
- Truong K Chau
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Nguyen T Ho
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Tuan H Ho
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Anh T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Khoa D Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Nam T S Phan
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Ha V Le
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
| | - Tung T Nguyen
- Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam.
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Ho Chi Minh City, Vietnam
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2
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Pipaón Fernández N, Cruise O, Easton SEF, Kaplan JM, Woodard JL, Hruszkewycz DP, Leitch DC. Direct Heterocycle C-H Alkenylation via Dual Catalysis Using a Palladacycle Precatalyst: Multifactor Optimization and Scope Exploration Enabled by High-Throughput Experimentation. J Org Chem 2024. [PMID: 38206166 DOI: 10.1021/acs.joc.3c02311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
One of the major challenges in developing catalytic methods for C-C bond formation is the identification of generally applicable reaction conditions, particularly if multiple substrate structural classes are involved. Pd-catalyzed direct arylation reactions are powerful transformations that enable direct functionalization of C-H bonds; however, the corresponding direct alkenylation reactions, using vinyl (pseudo) halide electrophiles, are less well developed. Inspired by process development efforts toward GSK3368715, an investigational active pharmaceutical ingredient, we report that a Pd(II) palladacycle derived from tri-tert-butylphosphine and Pd(OAc)2 is an effective single-component precatalyst for a variety of direct alkenylation reactions. High-throughput experimentation identified optimal solvent/base combinations for a variety of HetAr-H substrate classes undergoing C-H activation without the need for cocatalysts or stoichiometric silver bases (e.g., Ag2CO3). We propose this reaction proceeds via a dual cooperative catalytic mechanism, where in situ-generated Pd(0) supports a canonical Pd(0)/(II) cross-coupling cycle and the palladacycle effects C-H activation via CMD in a redox-neutral cycle. In all, 192 substrate combinations were tested with a hit rate of approximately 40% and 24 isolated examples. Importantly, this method was applied to prepare a key intermediate in the synthesis of GSK3368715 on multigram scale.
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Affiliation(s)
- Nahiane Pipaón Fernández
- Department of Chemistry, University of Victoria, 3800 Finnerty Road., Victoria, Briish Columbia V8P 5C2, Canada
| | - Odhran Cruise
- Department of Chemistry, University of Victoria, 3800 Finnerty Road., Victoria, Briish Columbia V8P 5C2, Canada
| | - Sarah E F Easton
- Department of Chemistry, University of Victoria, 3800 Finnerty Road., Victoria, Briish Columbia V8P 5C2, Canada
| | - Justin M Kaplan
- Chemical Development, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States
| | - John L Woodard
- Chemical Development, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States
| | - Damian P Hruszkewycz
- Chemical Development, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426, United States
| | - David C Leitch
- Department of Chemistry, University of Victoria, 3800 Finnerty Road., Victoria, Briish Columbia V8P 5C2, Canada
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3
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Palladium-Catalyzed Dehydrogenative C-2 Alkenylation of 5-Arylimidazoles and Related Azoles with Styrenes. Catalysts 2021. [DOI: 10.3390/catal11070762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The construction of carbon–carbon bonds by direct involvement of two unactivated carbon–hydrogen bonds, without any directing group, ensures a high atom economy of the entire process. Here, we describe a simple protocol for the Pd(II)/Cu(II)-promoted intermolecular cross-dehydrogenative coupling (CDC) of 5-arylimidazoles, benzimidazoles, benzoxazole and 4,5-diphenylimidazole at their C-2 position with functionalized styrenes. This specific CDC, known as the Fujiwara–Moritani reaction or oxidative Heck coupling, also allowed the C-4 alkenylation of the imidazole nucleus when both 2 and 5 positions were occupied.
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4
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Basak S, Dutta S, Maiti D. Accessing C2-Functionalized 1,3-(Benz)azoles through Transition Metal-Catalyzed C-H Activation. Chemistry 2021; 27:10533-10557. [PMID: 33909304 DOI: 10.1002/chem.202100475] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Indexed: 12/22/2022]
Abstract
The skeletal presence of 1,3-azoles in a variety of bioactive natural products, pharmacophores, and organic materials demands the derivatization of such heteroarenes regioselectively. Plenty of cross-coupling as well as cyclocondensation reactions have been performed to build up these skeletons but remained commercially unrealizable. A couple of severe drawbacks are faced by these traditional protocols that require a more straightforward strategy to obviate them. Transition metal-catalyzed C-H functionalization has emerged as a superior alternative in that context. 1,3-Azoles and their benzo counterparts have been extensively functionalized exploiting both noble and earth-abundant transition metals. Lately, C-2 functionalization have gained much traction due to the ease of attaining high regioselectivity and installation of synthetically manipulative functionalities. This critical review presents a bird's eye view of all major C-2 functionalization of (benz)azoles catalyzed by a diverse set of metals performed over the past 15 years.
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Affiliation(s)
- Sumon Basak
- Department of Chemistry, Banaras Hindu University, Varanasi, UP, 221005, India
| | - Subhabrata Dutta
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, MH, 400076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, MH, 400076, India
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5
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Jagtap RA, Punji B. Nickel-Catalyzed C-H Bond Functionalization of Azoles and Indoles. CHEM REC 2021; 21:3573-3588. [PMID: 34075686 DOI: 10.1002/tcr.202100113] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/10/2021] [Accepted: 05/11/2021] [Indexed: 10/21/2022]
Abstract
Direct C-H functionalization of privileged and biologically relevant azoles and indoles represents an important chemical transformation in molecular science. Despite significant progress in the palladium-catalyzed regioselective C-H functionalization of azoles and indoles, the use of abundant and less expensive nickel catalyst is underdeveloped. In the recent past, the nickel-catalyzed regioselective C-H alkylation, arylation, alkenylation and alkynylation of azoles and indoles have been substantially explored, which can be applied to the complex organic molecule synthesis. In this Account, we summarize the developments in nickel-catalyzed regioselective functionalization of azoles and indoles with a considerable focus on the reaction mechanism.
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Affiliation(s)
- Rahul A Jagtap
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune, 411 008, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
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6
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Bold CP, Klaus C, Pfeiffer B, Schürmann J, Lombardi R, Lucena-Agell D, Díaz JF, Altmann KH. Studies toward the Synthesis of an Oxazole-Based Analog of (-)-Zampanolide. Org Lett 2021; 23:2238-2242. [PMID: 33635661 DOI: 10.1021/acs.orglett.1c00378] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Studies are described toward the synthesis of an oxazole-based analog of (-)-zampanolide (2). Construction of (-)-dactylolide analog 22 was achieved via alcohol 5 and acid 4 through esterification and Horner-Wadsworth-Emmons (HWE)-based macrocyclization; however, attempts to attach (Z,E)-sorbamide to 22 proved unsuccessful. The C(8)-C(9) double bond of the macrocycle was prone to migration into conjugation with the oxazole ring, which may generally limit the usefulness of zampanolide analogs with aromatic moieties as tetrahydropyran replacements.
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Affiliation(s)
- Christian P Bold
- ETH Zürich, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, Vladimir-Prelog-Weg 4, 8093 Zürich, Switzerland
| | - Cindy Klaus
- ETH Zürich, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, Vladimir-Prelog-Weg 4, 8093 Zürich, Switzerland
| | - Bernhard Pfeiffer
- ETH Zürich, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, Vladimir-Prelog-Weg 4, 8093 Zürich, Switzerland
| | - Jasmine Schürmann
- ETH Zürich, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, Vladimir-Prelog-Weg 4, 8093 Zürich, Switzerland
| | - Rafael Lombardi
- ETH Zürich, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, Vladimir-Prelog-Weg 4, 8093 Zürich, Switzerland
| | - Daniel Lucena-Agell
- Centro de Investigaciones Biológicas Margarita Salas, Consejo Superior de Investigaciones Científicas, Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - J Fernando Díaz
- Centro de Investigaciones Biológicas Margarita Salas, Consejo Superior de Investigaciones Científicas, Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Karl-Heinz Altmann
- ETH Zürich, Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, Vladimir-Prelog-Weg 4, 8093 Zürich, Switzerland
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7
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Ankade SB, Shabade AB, Soni V, Punji B. Unactivated Alkyl Halides in Transition-Metal-Catalyzed C–H Bond Alkylation. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05580] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shidheshwar B. Ankade
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Anand B. Shabade
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Vineeta Soni
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Lab, Chemical Engineering Division, CSIR−National Chemical Laboratory (CSIR−NCL), Dr. Homi Bhabha Road, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
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8
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Li C, Chen B, Ma X, Mo X, Zhang G. Light‐Promoted Copper‐Catalyzed Enantioselective Alkylation of Azoles. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202009323] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Chen Li
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Center for Excellence in Molecular Synthesis University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
| | - Bin Chen
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Center for Excellence in Molecular Synthesis University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
| | - Xiaodong Ma
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Center for Excellence in Molecular Synthesis University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
| | - Xueling Mo
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Center for Excellence in Molecular Synthesis University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
| | - Guozhu Zhang
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Center for Excellence in Molecular Synthesis University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
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9
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Li C, Chen B, Ma X, Mo X, Zhang G. Light‐Promoted Copper‐Catalyzed Enantioselective Alkylation of Azoles. Angew Chem Int Ed Engl 2020; 60:2130-2134. [DOI: 10.1002/anie.202009323] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/06/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Chen Li
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Center for Excellence in Molecular Synthesis University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
| | - Bin Chen
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Center for Excellence in Molecular Synthesis University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
| | - Xiaodong Ma
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Center for Excellence in Molecular Synthesis University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
| | - Xueling Mo
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Center for Excellence in Molecular Synthesis University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
| | - Guozhu Zhang
- State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Center for Excellence in Molecular Synthesis University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
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10
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Mandapati P, Braun JD, Sidhu BK, Wilson G, Herbert DE. Catalytic C–H Bond Alkylation of Azoles with Alkyl Halides Mediated by Nickel(II) Complexes of Phenanthridine-Based N^N–^N Pincer Ligands. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00161] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pavan Mandapati
- Department of Chemistry and the Manitoba Institute of Materials, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
| | - Jason D. Braun
- Department of Chemistry and the Manitoba Institute of Materials, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
| | - Baldeep K. Sidhu
- Department of Chemistry and the Manitoba Institute of Materials, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
| | - Gabrielle Wilson
- Department of Chemistry and the Manitoba Institute of Materials, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
| | - David E. Herbert
- Department of Chemistry and the Manitoba Institute of Materials, University of Manitoba, 144 Dysart Road, Winnipeg, Manitoba R3T 2N2, Canada
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11
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Liu D, Yu L, Yu Y, Xia Z, Song Z, Liao L, Tan Z, Chen X. Nickel-Catalyzed Ortho
C-H Methylation of Aromatic Amides with Di-tert
-butyl Peroxide as Methylation Reagent. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901211] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Da Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; 410082 Changsha P. R. China
- College of Chemistry and Chemical Engineering; Kamp Pharmaceuticals CO., LTD.; 415900 Changde P. R. China
| | - Lin Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; 410082 Changsha P. R. China
| | - Yongqi Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; 410082 Changsha P. R. China
| | - Zhen Xia
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; 410082 Changsha P. R. China
| | - Zenan Song
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; 410082 Changsha P. R. China
| | - Lihong Liao
- College of Chemistry and Chemical Engineering; Kamp Pharmaceuticals CO., LTD.; 415900 Changde P. R. China
| | - Ze Tan
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; 410082 Changsha P. R. China
| | - Xiang Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics; College of Chemistry and Chemical Engineering; Hunan University; 410082 Changsha P. R. China
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12
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Gao Q, Shang Y, Song F, Ye J, Liu ZS, Li L, Cheng HG, Zhou Q. Modular Dual-Tasked C-H Methylation via the Catellani Strategy. J Am Chem Soc 2019; 141:15986-15993. [PMID: 31512477 DOI: 10.1021/jacs.9b07857] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We report a dual-tasked methylation that is based on cooperative palladium/norbornene catalysis. Readily available (hetero)aryl halides (39 iodides and 4 bromides) and inexpensive MeOTs or trimethylphosphate are utilized as the substrates and methylating reagent, respectively. Six types of "ipso" terminations can modularly couple with this "ortho" C-H methylation to constitute a versatile methylation toolbox for preparing diversified methylated arenes. This toolbox features inexpensive methyl sources, excellent functional-group tolerance, simple reaction procedures, and scalability. Importantly, it can be uneventfully extended to isotope-labeled methylation by switching to the corresponding reagents CD3OTs or 13CH3OTs. Moreover, this toolbox can be applied to late-stage modification of biorelevant substrates with complete stereoretention. We believe these salient and practical features of our dual-tasked methylation toolbox will be welcomed by academic and industrial researchers.
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13
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Patel UN, Jagtap RA, Punji B. Scope and Mechanistic Aspect of Nickel-Catalyzed Alkenylation of Benzothiazoles and Related Azoles with Styryl Bromides. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00060] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Evano G, Theunissen C. Beyond Friedel and Crafts: Innate Alkylation of C−H Bonds in Arenes. Angew Chem Int Ed Engl 2019; 58:7558-7598. [DOI: 10.1002/anie.201806631] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Indexed: 12/28/2022]
Affiliation(s)
- Gwilherm Evano
- Laboratoire de Chimie Organique, Service de Chimie et Physico-Chimie OrganiquesUniversité libre de Bruxelles (ULB) Avenue F.D. Roosevelt 50, CP160/06 1050 Brussels Belgium
| | - Cédric Theunissen
- Laboratoire de Chimie Organique, Service de Chimie et Physico-Chimie OrganiquesUniversité libre de Bruxelles (ULB) Avenue F.D. Roosevelt 50, CP160/06 1050 Brussels Belgium
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15
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Evano G, Theunissen C. Jenseits von Friedel und Crafts: immanente Alkylierung von C‐H‐Bindungen in Arenen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201806631] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Gwilherm Evano
- Laboratoire de Chimie Organique, Service de Chimie et Physico-Chimie OrganiquesUniversité libre de Bruxelles (ULB) Avenue F. D. Roosevelt 50, CP160/06 1050 Brüssel Belgien
| | - Cédric Theunissen
- Laboratoire de Chimie Organique, Service de Chimie et Physico-Chimie OrganiquesUniversité libre de Bruxelles (ULB) Avenue F. D. Roosevelt 50, CP160/06 1050 Brüssel Belgien
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16
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Decoration of 1,3-oxazole by alkyl substituents via CH activation (microreview). Chem Heterocycl Compd (N Y) 2019. [DOI: 10.1007/s10593-019-02442-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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Room-temperature palladium-catalyzed direct 2-alkenylation of azole derivatives with alkenyl bromides. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2018.11.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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18
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Jagtap RA, Vinod CP, Punji B. Nickel-Catalyzed Straightforward and Regioselective C–H Alkenylation of Indoles with Alkenyl Bromides: Scope and Mechanistic Aspect. ACS Catal 2018. [DOI: 10.1021/acscatal.8b04267] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Pan WJ, Wang ZX. Palladium-Catalyzed C−H Benzylation of (Benzo)oxazoles with Benzylic Quaternary Ammonium Triflates. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800264] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wen-Jing Pan
- CAS Key Laboratory of Soft Matter Chemistry, and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
| | - Zhong-Xia Wang
- CAS Key Laboratory of Soft Matter Chemistry, and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P.R. China
- Collaborative Innovation Center of Chemical Science, and Engineering (Tianjin); Tianjin 300072 P.R. China
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20
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Patel UN, Jain S, Pandey DK, Gonnade RG, Vanka K, Punji B. Mechanistic Aspects of Pincer Nickel(II)-Catalyzed C–H Bond Alkylation of Azoles with Alkyl Halides. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00025] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ulhas N. Patel
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110 020, India
| | | | - Dilip K. Pandey
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110 020, India
| | | | | | - Benudhar Punji
- Academy of Scientific and Innovative Research (AcSIR), New Delhi 110 020, India
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21
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Tang X, Yang K, Zeng L, Liu Q, Chen H. Pd-catalyzed desulfitative arylation for the synthesis of 2,5-diarylated oxazole-4-carboxylates using dioxygen as the terminal oxidant. Org Biomol Chem 2017; 15:8504-8507. [DOI: 10.1039/c7ob01912b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A novel palladium-catalyzed approach for constructing 2,5-diarylated oxazole-4-carboxylates using sodium arylsulfinates as the aryl source has been demonstrated.
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Affiliation(s)
- Xiaodong Tang
- Guangdong Provincial Key Laboratory of New Drug Screening
- School of Pharmaceutical Sciences
- Southern Medical University
- Baiyun District
- P. R. China
| | - Kai Yang
- School of Pharmaceutical Sciences
- Gannan Medical University
- Ganzhou
- P. R. China
| | - Liying Zeng
- School of Traditional Chinese Medicine
- Southern Medical University
- Baiyun District
- P. R. China
| | - Qiang Liu
- School of Traditional Chinese Medicine
- Southern Medical University
- Baiyun District
- P. R. China
| | - Huoji Chen
- School of Traditional Chinese Medicine
- Southern Medical University
- Baiyun District
- P. R. China
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22
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Li D, Wu XX, Gao T, Li B, Chen S. CuCl-Catalyzed direct C–H alkenylation of benzoxazoles with allyl halides. Org Biomol Chem 2017; 15:7282-7285. [DOI: 10.1039/c7ob01838j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and concise CuCl-catalyzed C2-alkenylation reaction of benzoxazoles with allyl halides has been established.
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Affiliation(s)
- Die Li
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- Department of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Xin-Xing Wu
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- Department of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Tingyu Gao
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- Department of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Baoguo Li
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- Department of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Shufeng Chen
- Inner Mongolia Key Laboratory of Fine Organic Synthesis
- Department of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
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23
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Hu L, Liu X, Liao X. Nickel-Catalyzed Methylation of Aryl Halides with Deuterated Methyl Iodide. Angew Chem Int Ed Engl 2016; 55:9743-7. [PMID: 27381725 DOI: 10.1002/anie.201604406] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 05/31/2016] [Indexed: 01/28/2023]
Abstract
A nickel-catalyzed methylation of aryl halides with cheap and readily available CH3 I or CD3 I is described. The reaction is applicable to a wide range of substrates and allows installation of a CD3 group under mild reaction conditions without deuterium scrambling to other carbon atoms. Initial mechanistic studies on the stoichiometric and catalytic reactions of the isolated [(dppp)Ni(C6 H4 -4-CO2 Et)Br] [dppp=1,3-bis(diphenylphosphanyl)propane] suggest that a Ni(0) /Ni(II) catalytic cycle is favored.
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Affiliation(s)
- Lu Hu
- Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University, Beijing, 100084, China
| | - Xin Liu
- Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University, Beijing, 100084, China
| | - Xuebin Liao
- Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University, Beijing, 100084, China.
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24
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Hu L, Liu X, Liao X. Nickel-Catalyzed Methylation of Aryl Halides with Deuterated Methyl Iodide. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604406] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Lu Hu
- Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Tsinghua University; Beijing 100084 China
| | - Xin Liu
- Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Tsinghua University; Beijing 100084 China
| | - Xuebin Liao
- Department of Pharmacology and Pharmaceutical Sciences, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Tsinghua University; Beijing 100084 China
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25
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Patel UN, Pandey DK, Gonnade RG, Punji B. Synthesis of Quinoline-Based NNN-Pincer Nickel(II) Complexes: A Robust and Improved Catalyst System for C–H Bond Alkylation of Azoles with Alkyl Halides. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00201] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ulhas N. Patel
- Organometallic Synthesis
and Catalysis Group, Chemical Engineering
Division, and ‡Centre for Material Characterization, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
| | - Dilip K. Pandey
- Organometallic Synthesis
and Catalysis Group, Chemical Engineering
Division, and ‡Centre for Material Characterization, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
| | - Rajesh G. Gonnade
- Organometallic Synthesis
and Catalysis Group, Chemical Engineering
Division, and ‡Centre for Material Characterization, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
| | - Benudhar Punji
- Organometallic Synthesis
and Catalysis Group, Chemical Engineering
Division, and ‡Centre for Material Characterization, CSIR-National Chemical Laboratory (CSIR-NCL), Dr. Homi Bhabha Road, Pune 411 008, Maharashtra, India
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26
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Théveau L, Schneider C, Querolle O, Meerpoel L, Levacher V, Hoarau C. Synthesis and orthogonal functionalization of oxazolo[5',4':4,5]pyrano[2,3-b]pyridine by intra- and intermolecular Pd-catalyzed direct C-H bond heteroarylation. Org Biomol Chem 2016; 14:3459-68. [PMID: 26967763 DOI: 10.1039/c6ob00227g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The construction and subsequent orthogonal functionalization of a hitherto unknown oxazolo[5',4':4,5]pyrano[2,3-b]pyridine are reported. A palladium-catalyzed direct C-H bond functionalization methodology was used to build the tricyclic scaffold as well as to achieve the subsequent C-H bond functionalization at the C-2 position of the oxazole unit with various (hetero)aryl iodides. Remarkably, selective C-H construction and functionalization procedures preserve the chorine atom on the pyridine moiety offering a late-stage substitution site to progress drug design.
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Affiliation(s)
- Laure Théveau
- Normandie University, COBRA, UMR 6014 et FR 3038 University Rouen; INSA Rouen; CNRS, IRCOF 1 rue Tesnière 76821, Mont Saint Aignan Cedex, France.
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27
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Tu D, Cheng X, Gao Y, Yang P, Ding Y, Jiang C. Palladium-catalysed direct C-2 methylation of indoles. Org Biomol Chem 2016; 14:7443-6. [DOI: 10.1039/c6ob01281g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A direct C-2 methylation reaction of indoles bearing an N-2-pyrimidyl directing group has been developed with a palladium catalyst.
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Affiliation(s)
- Daoquan Tu
- Department of Pharmaceutical Engineering
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Xiuzhi Cheng
- Department of Pharmaceutical Engineering
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Yadong Gao
- Department of Pharmaceutical Engineering
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Panpan Yang
- Department of Pharmaceutical Engineering
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Yousong Ding
- Department of Medicinal Chemistry
- College of Pharmacy
- University of Florida
- Gainesville
- USA
| | - Chao Jiang
- Department of Pharmaceutical Engineering
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
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28
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Ahlers A, de Haro T, Gabor B, Fürstner A. Concise Total Synthesis of Enigmazole A. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201510026] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Andreas Ahlers
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Teresa de Haro
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Barbara Gabor
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
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29
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Ahlers A, de Haro T, Gabor B, Fürstner A. Concise Total Synthesis of Enigmazole A. Angew Chem Int Ed Engl 2015; 55:1406-11. [DOI: 10.1002/anie.201510026] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Indexed: 12/26/2022]
Affiliation(s)
- Andreas Ahlers
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Teresa de Haro
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Barbara Gabor
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung; 45470 Mülheim/Ruhr Germany
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30
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Jang HL, Kim HT, Cho EJ, Joo JM. Electronically Matching C−H Alkylation Strategies for the Synthesis of α-Heteroaryl Acetic Acid Derivatives. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500388] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ha-Lim Jang
- Department of Chemistry; Chemistry Institute of Functional Materials; Pusan National University; Busan 46241 Republic of Korea
| | - Hyun Tae Kim
- Department of Chemistry; Chemistry Institute of Functional Materials; Pusan National University; Busan 46241 Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry; Chung-Ang University; Seoul 06974 Republic of Korea
| | - Jung Min Joo
- Department of Chemistry; Chemistry Institute of Functional Materials; Pusan National University; Busan 46241 Republic of Korea
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31
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N-heterocyclic carbene-Pd(II)-1-methylimidazole complex catalyzed C–H bond benzylation of (benzo)oxazoles with benzyl chlorides. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.07.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Graczyk K, Haven T, Ackermann L. Iron-Catalyzed C(sp2)H and C(sp3)H Methylations of Amides and Anilides. Chemistry 2015; 21:8812-5. [DOI: 10.1002/chem.201501134] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Indexed: 01/27/2023]
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33
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Yan G, Borah AJ, Wang L, Yang M. Recent Advances in Transition Metal-Catalyzed Methylation Reactions. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400984] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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34
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Aihara Y, Wuelbern J, Chatani N. The Nickel(II)-Catalyzed Direct Benzylation, Allylation, Alkylation, and Methylation of C–H Bonds in Aromatic Amides Containing an 8-Aminoquinoline Moiety as the Directing Group. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20140387] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yoshinori Aihara
- Department of Applied Chemistry, Faculty of Engineering, Osaka University
| | - Jendrik Wuelbern
- Department of Applied Chemistry, Faculty of Engineering, Osaka University
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University
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35
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Hikawa H, Izumi K, Ino Y, Kikkawa S, Yokoyama Y, Azumaya I. Palladium-Catalyzed Benzylic CH BenzylationviaBis-Benzylpalladium(II) Complexes in Water: An Effective Pathway for the Direct Construction ofN-(1,2-Diphenylethyl)anilines. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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36
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Song XR, Qiu YF, Song B, Hao XH, Han YP, Gao P, Liu XY, Liang YM. BF3·Et2O-Promoted Cleavage of the Csp–Csp2 Bond of 2-Propynolphenols/Anilines: Route to C2-Alkenylated Benzoxazoles and Benzimidazoles. J Org Chem 2015; 80:2263-71. [DOI: 10.1021/jo502761x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Xian-Rong Song
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yi-Feng Qiu
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Bo Song
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xin-Hua Hao
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Ya-Ping Han
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Pin Gao
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xue-Yuan Liu
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yong-Min Liang
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
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37
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Zhang X, Lin Y, Zhang J, Cao S. Base-mediated direct fluoroalkenylation of 2-phenyl-1,3,4-oxadiazole, benzothiazole and benzoxazole with gem-difluoroalkenes. RSC Adv 2015. [DOI: 10.1039/c4ra13761b] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Direct α-fluorovinylation of 2-phenyl-1,3,4-oxadiazole, benzothiazole and benzoxazole with gem-difluoroalkenes under the assistance of KHMDS or NaH at room temperature was developed.
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Affiliation(s)
- Xuxue Zhang
- Shanghai Key Laboratory of Chemical Biology
- School of Pharmacy
- East China University of Science and Technology (ECUST)
- Shanghai 200237
- China
| | - Yingyin Lin
- Shanghai Key Laboratory of Chemical Biology
- School of Pharmacy
- East China University of Science and Technology (ECUST)
- Shanghai 200237
- China
| | - Juan Zhang
- Shanghai Key Laboratory of Chemical Biology
- School of Pharmacy
- East China University of Science and Technology (ECUST)
- Shanghai 200237
- China
| | - Song Cao
- Shanghai Key Laboratory of Chemical Biology
- School of Pharmacy
- East China University of Science and Technology (ECUST)
- Shanghai 200237
- China
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38
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Yadav AK, Yadav LDS. Direct construction of 2-alkylbenzo-1,3-azoles via C–H activation of alkanes for C–C and C–X (X = O, S) bond formation. Org Biomol Chem 2015; 13:2606-11. [DOI: 10.1039/c4ob02488e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-Alkylated benzo(oxa)thiazoles were prepared directly from simple alkanes and aryl isocyanates/isothiocyanates in a one-pot procedure.
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Affiliation(s)
- Arvind K. Yadav
- Green Synthesis Lab
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
| | - Lal Dhar S. Yadav
- Green Synthesis Lab
- Department of Chemistry
- University of Allahabad
- Allahabad-211002
- India
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39
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Hikawa H, Toyomoto M, Kikkawa S, Azumaya I. Direct substitution of benzylic alcohols with electron-deficient benzenethiols via π-benzylpalladium(ii) in water. Org Biomol Chem 2015; 13:11459-65. [DOI: 10.1039/c5ob01717c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An efficient and environmentally benign method for the direct nucleophilic substitution of benzylic alcohols with electron-deficient benzenethiols in water is developed. This strategy is an attractive atom-economical process, which affords the desired products along with water as the sole co-product.
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Affiliation(s)
- Hidemasa Hikawa
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
| | - Mariko Toyomoto
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
| | - Shoko Kikkawa
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
| | - Isao Azumaya
- Faculty of Pharmaceutical Sciences
- Toho University
- Funabashi
- Japan
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40
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Muselli M, Baudequin C, Hoarau C, Bischoff L. Pd-Catalyzed direct C–H functionalization of imidazolones with aryl- and alkenyl halides. Chem Commun (Camb) 2015; 51:745-8. [DOI: 10.1039/c4cc07917e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Direct C–H arylation and alkenylation of 4,4′-dialkylimidazolones with a broad range of halides under palladium and copper catalysis have been developed.
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Affiliation(s)
- Mickaël Muselli
- Mickaël Muselli
- Christine Baudequin
- Christophe Hoarau
- Laurent Bischoff Normandie Univ
- COBRA
| | - Christine Baudequin
- Mickaël Muselli
- Christine Baudequin
- Christophe Hoarau
- Laurent Bischoff Normandie Univ
- COBRA
| | - Christophe Hoarau
- Mickaël Muselli
- Christine Baudequin
- Christophe Hoarau
- Laurent Bischoff Normandie Univ
- COBRA
| | - Laurent Bischoff
- Mickaël Muselli
- Christine Baudequin
- Christophe Hoarau
- Laurent Bischoff Normandie Univ
- COBRA
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41
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Bae S, Jang HL, Jung H, Joo JM. Catalytic C–H Allylation and Benzylation of Pyrazoles. J Org Chem 2014; 80:690-7. [DOI: 10.1021/jo5025317] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Seri Bae
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Republic of Korea
| | - Ha-Lim Jang
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Republic of Korea
| | - Haeun Jung
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Republic of Korea
| | - Jung Min Joo
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University, Busan 609-735, Republic of Korea
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42
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Lee WC, Wang TH, Ong TG. Ligand promoted Pd-catalyzed dehydrogenative alkenylation of hetereoarenes. Chem Commun (Camb) 2014; 50:3671-3. [PMID: 24398602 DOI: 10.1039/c3cc48750d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Pd-catalyzed cross-dehydrogenative coupling of heteroarenes with styrenes and other olefinic substrates has been developed. This alkenylation paradigm encompasses a wide range of substrates and provides a straightforward approach toward C2-E-alkenylated azole motifs.
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Affiliation(s)
- Wei-Chih Lee
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, Republic of China.
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43
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Rousée K, Schneider C, Couve-Bonnaire S, Pannecoucke X, Levacher V, Hoarau C. Pd- and Cu-Catalyzed Stereo- and Regiocontrolled Decarboxylative/CH Fluoroalkenylation of Heteroarenes. Chemistry 2014; 20:15000-4. [DOI: 10.1002/chem.201405119] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Indexed: 12/15/2022]
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44
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Wu X, See JWT, Xu K, Hirao H, Roger J, Hierso JC, Zhou JS. A General Palladium-Catalyzed Method for Alkylation of Heteroarenes Using Secondary and Tertiary Alkyl Halides. Angew Chem Int Ed Engl 2014; 53:13573-7. [DOI: 10.1002/anie.201408355] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Indexed: 12/12/2022]
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45
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Wu X, See JWT, Xu K, Hirao H, Roger J, Hierso JC, Zhou JS. A General Palladium-Catalyzed Method for Alkylation of Heteroarenes Using Secondary and Tertiary Alkyl Halides. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408355] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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46
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Maji T, Ramakumar K, Tunge JA. Retro-Claisen benzylation: direct use of benzyl alcohols in Pd-catalyzed couplings with nitriles. Chem Commun (Camb) 2014; 50:14045-8. [DOI: 10.1039/c4cc07001a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Ogiwara Y, Kochi T, Kakiuchi F. Ruthenium-catalyzed Ortho-selective Aromatic C–H Alkenylation with Alkenyl Carbonates. CHEM LETT 2014. [DOI: 10.1246/cl.140006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yohei Ogiwara
- Department of Chemistry, Faculty of Science and Technology, Keio University
| | - Takuya Kochi
- Department of Chemistry, Faculty of Science and Technology, Keio University
| | - Fumitoshi Kakiuchi
- Department of Chemistry, Faculty of Science and Technology, Keio University
- JST, Advanced Catalytic Transformation program for Carbon utilization (ACT-C)
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48
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Li G, Arisawa M, Yamaguchi M. Rhodium-catalyzed synthesis of unsymmetrical di(aryl/heteroaryl)methanes using aryl/heteroarylmethyl ketones via CO–C bond cleavage. Chem Commun (Camb) 2014; 50:4328-30. [DOI: 10.1039/c4cc00816b] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The RhH(PPh3)4 complex catalyzes the reaction of aryl/heteroarylmethyl ketones and aryl heteroaryl ethers giving unsymmetrical diarylmethanes containing one or two heteroarenes.
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Affiliation(s)
- Guangzhe Li
- Department of Organic Chemistry
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai, Japan
| | - Mieko Arisawa
- Department of Organic Chemistry
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai, Japan
| | - Masahiko Yamaguchi
- Department of Organic Chemistry
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Sendai, Japan
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49
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Ogiwara Y, Tamura M, Kochi T, Matsuura Y, Chatani N, Kakiuchi F. Ruthenium-Catalyzed Ortho-Selective C–H Alkenylation of Aromatic Compounds with Alkenyl Esters and Ethers. Organometallics 2013. [DOI: 10.1021/om401204h] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yohei Ogiwara
- Department of Chemistry, Faculty of Science
and Technology, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Masaru Tamura
- Department of Chemistry, Faculty of Science
and Technology, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Takuya Kochi
- Department of Chemistry, Faculty of Science
and Technology, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Yusuke Matsuura
- 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
| | - Fumitoshi Kakiuchi
- Department of Chemistry, Faculty of Science
and Technology, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
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Schönherr H, Cernak T. Profound Methyl Effects in Drug Discovery and a Call for New CH Methylation Reactions. Angew Chem Int Ed Engl 2013; 52:12256-67. [DOI: 10.1002/anie.201303207] [Citation(s) in RCA: 569] [Impact Index Per Article: 51.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Indexed: 11/10/2022]
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