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Li H, Li S, Hu H, Sun R, Liu M, Ding A, Liu X, Luo W, Fu Z, Guo S, Cai H. Visible-light-induced C(sp 3)-C(sp 3) bond formation via radical/radical cross-coupling. Chem Commun (Camb) 2023; 59:1205-1208. [PMID: 36629273 DOI: 10.1039/d2cc05840e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Radical/radical cross-coupling remains challenging due to diffusion control issues. Herein, we report a visible-light-induced radical/radical cross-coupling reaction of quaternary ammonium salts and Hantzschs via C-N and C-C bond cleavage. The current synthetic approach furnishes 1,2-diphenylethanes in moderate to good yields and provides a method for the construction of the C(sp3)-C(sp3) bond.
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Affiliation(s)
- Haoyuan Li
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
| | - Sen Li
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
| | - Huimin Hu
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
| | - Runbo Sun
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
| | - Meixia Liu
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
| | - Anjun Ding
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
| | - Xiaoyong Liu
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
| | - Wenlin Luo
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
| | - Zhengjiang Fu
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
| | - Shengmei Guo
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
| | - Hu Cai
- Department of Chemistry, Nanchang University, No. 999, Xuefu Rd, Nanchang, 330031, P. R. China.
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2
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Electrochemical borylation of nitroarenes. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1470-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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3
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Design of a Nanoscale Ni Catalyst for Debenzylation Reactions via Hydrogenative C–N Bond Cleavage. Catal Letters 2022. [DOI: 10.1007/s10562-022-04196-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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4
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Zhong C, Tang H, Cui B, Shi Y, Cao C. Pd-NHC catalyzed Suzuki cross-coupling of benzyl ammonium salts. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04795-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Zhang T, Wang R, Chen J, Liu L, Huang T, Li C, Tang Z, Chen T. Base-promoted direct E-selective olefination of organoammonium salts with sulfones toward stilbenes and conjugated 1,3-dienes. Org Biomol Chem 2022; 20:4369-4375. [PMID: 35575463 DOI: 10.1039/d2ob00716a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A base-promoted direct deaminative olefination of organoammonium salts was developed. Only mediated by KOtBu, a series of benzyl and cinnamyl ammonium salts reacted smoothly with sulfones, producing the valuable stilbenes and related 1,3-diene derivatives in good to high yields with good functional group tolerance and excellent E-selectivity. With this developed method, biologically active resveratrol and DMU-212 were also successfully prepared, which further demonstrates the practicality of this reaction.
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Affiliation(s)
- Tao Zhang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Runji Wang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Jiani Chen
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Long Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Tianzeng Huang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Chunya Li
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Zhi Tang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
| | - Tieqiao Chen
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, 570228, China.
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6
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Sun SZ, Cai YM, Zhang DL, Wang JB, Yao HQ, Rui XY, Martin R, Shang M. Enantioselective Deaminative Alkylation of Amino Acid Derivatives with Unactivated Olefins. J Am Chem Soc 2022; 144:1130-1137. [PMID: 35029378 DOI: 10.1021/jacs.1c12350] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Herein, we report the first Ni-catalyzed enantioselective deaminative alkylation of amino acid and peptide derivatives with unactivated olefins. Key for success was the discovery of a new sterically encumbered bis(oxazoline) ligand backbone, thus offering a de novo technology for accessing enantioenriched sp3-sp3 linkages via sp3 C-N functionalization. Our protocol is distinguished by its broad scope and generality across a wide number of counterparts, even in the context of late-stage functionalization. In addition, an enantioselective deaminative remote hydroalkylation reaction of unactivated internal olefins is within reach, thus providing a useful entry point for forging enantioenriched sp3-sp3 centers at remote sp3 C-H sites.
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Affiliation(s)
- Shang-Zheng Sun
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.,Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Yue-Ming Cai
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - De-Liang Zhang
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Jia-Bao Wang
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Hong-Qing Yao
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Xi-Yan Rui
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain.,ICREA, Passeig Lluís Companys, 23, 08010, Barcelona, Spain
| | - Ming Shang
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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7
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Wang Y, Li F, Zeng Q. Advances in Formation of C—X Bonds via Cleavage of C—N Bond of Quaternary Ammonium Salts. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a21110536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Ji S, Qin S, Yin C, Luo L, Zhang H. Unreactive C-N Bond Activation of Anilines via Photoinduced Aerobic Borylation. Org Lett 2021; 24:64-68. [PMID: 34898225 DOI: 10.1021/acs.orglett.1c03590] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Unreactive C-N bond activation of anilines was achieved by photoinduced aerobic borylation. A diverse range of tertiary and secondary anilines were converted to aryl boronate esters in moderate to good yields with wide functional group tolerance under simple and ambient photochemical conditions. This transformation achieved the direct and facile C-N bond activation of unreactive anilines, providing a convenient and practical route transforming widely available anilines into useful aryl boronate esters.
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Affiliation(s)
- Shuohan Ji
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education and Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, China.,College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Shengxiang Qin
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education and Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, China.,College of Chemistry, Nanchang University, Nanchang 330031, China
| | - Chunyu Yin
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education and Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Lu Luo
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education and Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, China
| | - Hua Zhang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education and Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, China.,College of Chemistry, Nanchang University, Nanchang 330031, China
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9
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10
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Bose SK, Mao L, Kuehn L, Radius U, Nekvinda J, Santos WL, Westcott SA, Steel PG, Marder TB. First-Row d-Block Element-Catalyzed Carbon-Boron Bond Formation and Related Processes. Chem Rev 2021; 121:13238-13341. [PMID: 34618418 DOI: 10.1021/acs.chemrev.1c00255] [Citation(s) in RCA: 96] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Organoboron reagents represent a unique class of compounds because of their utility in modern synthetic organic chemistry, often affording unprecedented reactivity. The transformation of the carbon-boron bond into a carbon-X (X = C, N, and O) bond in a stereocontrolled fashion has become invaluable in medicinal chemistry, agrochemistry, and natural products chemistry as well as materials science. Over the past decade, first-row d-block transition metals have become increasingly widely used as catalysts for the formation of a carbon-boron bond, a transformation traditionally catalyzed by expensive precious metals. This recent focus on alternative transition metals has enabled growth in fundamental methods in organoboron chemistry. This review surveys the current state-of-the-art in the use of first-row d-block element-based catalysts for the formation of carbon-boron bonds.
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Affiliation(s)
- Shubhankar Kumar Bose
- Centre for Nano and Material Sciences (CNMS), Jain University, Jain Global Campus, Bangalore-562112, India
| | - Lujia Mao
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, 571199 Haikou, Hainan, P. R. China
| | - Laura Kuehn
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Udo Radius
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Jan Nekvinda
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Webster L Santos
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Stephen A Westcott
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Patrick G Steel
- Department of Chemistry, University of Durham, Science Laboratories South Road, Durham DH1 3LE, U.K
| | - Todd B Marder
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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11
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Huang M, Hu J, Krummenacher I, Friedrich A, Braunschweig H, Westcott SA, Radius U, Marder TB. Base-Mediated Radical Borylation of Alkyl Sulfones. Chemistry 2021; 28:e202103866. [PMID: 34713940 PMCID: PMC9299846 DOI: 10.1002/chem.202103866] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Indexed: 11/06/2022]
Abstract
A practical and direct method was developed for the production of versatile alkylboronic esters via transition metal-free borylation of primary and secondary alkyl sulfones. The key to the success of the strategy is the use of bis(neopentyl glycolato) diboron (B 2 neop 2 ), with a stoichiometric amount of base as a promoter. The practicality and industrial potential of this protocol are highlighted by its wide functional group tolerance, the late-stage modification of complex compounds, no need for further transesterification, and operational simplicity. Radical clock, radical trap experiments, and EPR studies were conducted which show that the borylation process involves radical intermediates.
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Affiliation(s)
- Mingming Huang
- Julius-Maximilians-Universität Würzburg: Julius-Maximilians-Universitat Wurzburg, Institute for Inorganic Chemistry, GERMANY
| | - Jiefeng Hu
- Julius-Maximilians-Universität Würzburg, Institute for Inorganic Chemistry, GERMANY
| | - Ivo Krummenacher
- Julius-Maximilians-Universität Würzburg: Julius-Maximilians-Universitat Wurzburg, Institute For Inorganic Chemistry, GERMANY
| | - Alexandra Friedrich
- Julius-Maximilians-Universität Würzburg: Julius-Maximilians-Universitat Wurzburg, Institute for Inorganic Chemistry, GERMANY
| | - Holger Braunschweig
- Julius-Maximilians-Universität Würzburg: Julius-Maximilians-Universitat Wurzburg, Institute for Inorganic Chemistry, GERMANY
| | - Stephen A Westcott
- Mount Allison University, Department of Chemistry and Biochemistry, GERMANY
| | - Udo Radius
- Julius-Maximilians-Universität Würzburg: Julius-Maximilians-Universitat Wurzburg, Institute for Inorganic Chemistry, GERMANY
| | - Todd B Marder
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074, Würzburg, GERMANY
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12
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Tang H, Liu M, Zhu M, Cui B, Shi Y, Cao C. C(sp2)-C(sp2) Suzuki cross-coupling of arylammonium salts catalyzed by a stable Pd–NHC complex. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132431] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Huang M, Wu Z, Krebs J, Friedrich A, Luo X, Westcott SA, Radius U, Marder TB. Ni-Catalyzed Borylation of Aryl Sulfoxides. Chemistry 2021; 27:8149-8158. [PMID: 33851475 PMCID: PMC8252015 DOI: 10.1002/chem.202100342] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Indexed: 12/21/2022]
Abstract
A nickel/N-heterocyclic carbene (NHC) catalytic system has been developed for the borylation of aryl sulfoxides with B2 (neop)2 (neop=neopentyl glycolato). A wide range of aryl sulfoxides with different electronic and steric properties were converted into the corresponding arylboronic esters in good yields. The regioselective borylation of unsymmetric diaryl sulfoxides was also feasible leading to borylation of the sterically less encumbered aryl substituent. Competition experiments demonstrated that an electron-deficient aryl moiety reacts preferentially. The origin of the selectivity in the Ni-catalyzed borylation of electronically biased unsymmetrical diaryl sulfoxide lies in the oxidative addition step of the catalytic cycle, as oxidative addition of methoxyphenyl 4-(trifluoromethyl)phenyl sulfoxide to the Ni(0) complex occurs selectively to give the structurally characterized complex trans-[Ni(ICy)2 (4-CF3 -C6 H4 ){(SO)-4-MeO-C6 H4 }] 4. For complex 5, the isomer trans-[Ni(ICy)2 (C6 H5 )(OSC6 H5 )] 5-I was structurally characterized in which the phenyl sulfinyl ligand is bound via the oxygen atom to nickel. In solution, the complex trans-[Ni(ICy)2 (C6 H5 )(OSC6 H5 )] 5-I is in equilibrium with the S-bonded isomer trans-[Ni(ICy)2 (C6 H5 )(SOC6 H5 )] 5, as shown by NMR spectroscopy. DFT calculations reveal that these isomers are separated by a mere 0.3 kJ/mol (M06/def2-TZVP-level of theory) and connected via a transition state trans-[Ni(ICy)2 (C6 H5 )(η2 -{SO}-C6 H5 )], which lies only 10.8 kcal/mol above 5.
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Affiliation(s)
- Mingming Huang
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Zhu Wu
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Johannes Krebs
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Alexandra Friedrich
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Xiaoling Luo
- Chongqing Key Laboratory of Inorganic Functional MaterialsCollege of ChemistryChongqing Normal UniversityChongqing401331China
| | - Stephen A. Westcott
- Department of Chemistry & BiochemistryMount Allison UniversitySackvilleNB E4L 1G8Canada
| | - Udo Radius
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Todd B. Marder
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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14
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Liu J, Yang Y, Ouyang K, Zhang WX. Transition-metal-catalyzed transformations of C–N single bonds: Advances in the last five years, challenges and prospects. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.04.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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15
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Washington JB, Assante M, Yan C, McKinney D, Juba V, Leach AG, Baillie SE, Reid M. Trialkylammonium salt degradation: implications for methylation and cross-coupling. Chem Sci 2021; 12:6949-6963. [PMID: 34123322 PMCID: PMC8153232 DOI: 10.1039/d1sc00757b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Trialkylammonium (most notably N,N,N-trimethylanilinium) salts are known to display dual reactivity through both the aryl group and the N-methyl groups. These salts have thus been widely applied in cross-coupling, aryl etherification, fluorine radiolabelling, phase-transfer catalysis, supramolecular recognition, polymer design, and (more recently) methylation. However, their application as electrophilic methylating reagents remains somewhat underexplored, and an understanding of their arylation versus methylation reactivities is lacking. This study presents a mechanistic degradation analysis of N,N,N-trimethylanilinium salts and highlights the implications for synthetic applications of this important class of salts. Kinetic degradation studies, in both solid and solution phases, have delivered insights into the physical and chemical parameters affecting anilinium salt stability. 1H NMR kinetic analysis of salt degradation has evidenced thermal degradation to methyl iodide and the parent aniline, consistent with a closed-shell SN2-centred degradative pathway, and methyl iodide being the key reactive species in applied methylation procedures. Furthermore, the effect of halide and non-nucleophilic counterions on salt degradation has been investigated, along with deuterium isotope and solvent effects. New mechanistic insights have enabled the investigation of the use of trimethylanilinium salts in O-methylation and in improved cross-coupling strategies. Finally, detailed computational studies have helped highlight limitations in the current state-of-the-art of solvation modelling of reaction in which the bulk medium undergoes experimentally observable changes over the reaction timecourse. The dual reactivity of N,N,N-trimethylanilinium salts towards arylation and methylation is decoupled in this mechanistic investigation to enable more strategic application of these salts in either reaction class.![]()
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Affiliation(s)
- Jack B Washington
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building 295 Cathedral Street Glasgow UK
| | - Michele Assante
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University Byrom Street Liverpool UK
| | - Chunhui Yan
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building 295 Cathedral Street Glasgow UK
| | - David McKinney
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building 295 Cathedral Street Glasgow UK
| | - Vanessa Juba
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building 295 Cathedral Street Glasgow UK
| | - Andrew G Leach
- Division of Pharmacy and Optometry, University of Manchester Stopford Building Oxford Road Manchester UK
| | | | - Marc Reid
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building 295 Cathedral Street Glasgow UK
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16
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Zhu ZF, Chen GL, Liu F. Ruthenium-catalysed meta-selective C Ar-H bond alkylation via a deaminative strategy. Chem Commun (Camb) 2021; 57:3411-3414. [PMID: 33687414 DOI: 10.1039/d1cc00039j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The use of aliphatic amines as alkylating reagents in organic synthesis via C-N bond activation remains underdeveloped. We herein describe a novel ruthenium-catalysed and directing-group assisted protocol for the synthesis of meta-alkylated arenes via dual C-H and C-N activation. Bench-stable and easily handled redox-active Katritzky pyridinium salts derived from abundant amines and amino acid species were used as alkyl radical precursors. This catalytic reaction could accommodate a broad range of functional groups and provide access to various meta-alkylated products.
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Affiliation(s)
- Ze-Fan Zhu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China.
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17
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Liu L, Tang Y, Wang K, Huang T, Chen T. Transition-Metal-Free and Base-Promoted Carbon–Heteroatom Bond Formation via C–N Cleavage of Benzyl Ammonium Salts. J Org Chem 2021; 86:4159-4170. [DOI: 10.1021/acs.joc.0c02992] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Long Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Laboratory of Fine Chemical, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
| | - Yuanyuan Tang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Laboratory of Fine Chemical, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
| | - Kunyu Wang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Laboratory of Fine Chemical, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
| | - Tianzeng Huang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Laboratory of Fine Chemical, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
| | - Tieqiao Chen
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Laboratory of Fine Chemical, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
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18
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Xu J, Bercher OP, Talley MR, Watson MP. Nickel-Catalyzed, Stereospecific C-C and C-B Cross-Couplings via C-N and C-O Bond Activation. ACS Catal 2021; 11:1604-1612. [PMID: 33986970 DOI: 10.1021/acscatal.0c05484] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Highly enantioenriched benzylic and allylic amines and alcohols are readily available via asymmetric synthesis and in complex natural products. The development of mild, nickel-catalyzed cross-couplings of their derivatives has advanced the tools available for the preparation of a range of highly enantioenriched products, including those with quaternary stereocenters. This perspective focuses on cross-couplings with convenient and functional group-tolerant organoboron reagents and highlights the discoveries of activating groups and conditions that have led to high-yielding and highly stereospecific reactions. Emphasis is placed on mechanistic understanding, particularly with regards to controlling inversion vs. retention pathways. Limitations and opportunities for future developments are also highlighted.
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Affiliation(s)
- Jianyu Xu
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Olivia P. Bercher
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Michael R. Talley
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Mary P. Watson
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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19
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Zhang C, Ma NN, Yu ZL, Shen C, Zhou X, Chu XQ, Rao W, Shen ZL. Palladium-catalyzed direct reductive cross-coupling of aryltrimethylammonium salts with aryl bromides. Org Chem Front 2021. [DOI: 10.1039/d1qo00759a] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Palladium-catalyzed direct reductive cross-coupling of aryltrimethylammonium salts with aryl bromides proceeded efficiently in a one-pot manner in the presence of Mg turnings, LiCl, and TMEDA in THF to afford the corresponding biaryl compounds.
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Affiliation(s)
- Chen Zhang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Na-Na Ma
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Zi-Lun Yu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chuanji Shen
- College of Biological, Chemical Science and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing 314001, China
| | - Xiaocong Zhou
- College of Biological, Chemical Science and Engineering, Jiaxing University, 118 Jiahang Road, Jiaxing 314001, China
| | - Xue-Qiang Chu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Weidong Rao
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Zhi-Liang Shen
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
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20
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Kong X, Lin L, Chen Q, Xu B. Radical generation from electroreduction of aryl and benzyl ammonium salts: synthesis of organoboronates. Org Chem Front 2021. [DOI: 10.1039/d0qo00979b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a direct electrocatalytic borylation of aryl and benzyl trimethylammonium salts with bis(pinacolato)diboron at room temperature.
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Affiliation(s)
- Xianqiang Kong
- School of Chemical Engineering and Materials
- Changzhou Institute of Technology
- Changzhou 213032
- China
- Key Lab of Science and Technology of Eco-Textile
| | - Long Lin
- Key Lab of Science and Technology of Eco-Textile
- Ministry of Education
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
| | - Qianjin Chen
- Key Lab of Science and Technology of Eco-Textile
- Ministry of Education
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
| | - Bo Xu
- Key Lab of Science and Technology of Eco-Textile
- Ministry of Education
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
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21
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Morris KC, Wright SE, Meyer GF, Clark TB. Phosphine-Directed sp 3 C-H, C-O, and C-N Borylation. J Org Chem 2020; 85:14795-14801. [PMID: 32942856 DOI: 10.1021/acs.joc.0c01706] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Benzylic C-H borylation reactions are limited, requiring new approaches to exploit their reactivity for efficient selective functionalization. The recent development of phosphine-directed C-H borylation of arenes has now been extended to benzylic substrates, providing high yield of the mono- and geminal bis-borylation products. Attempts to borylate the C-H bond α to a benzylic ether or amine resulted in C-O and C-N borylation, followed by C-H borylation to provide geminal bis-borylated products.
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Affiliation(s)
- Kelsey C Morris
- Department of Chemistry and Biochemistry, University of San Diego, 5998 Alcala Park, San Diego, California 92110, United States
| | - Shawn E Wright
- Department of Chemistry and Biochemistry, University of San Diego, 5998 Alcala Park, San Diego, California 92110, United States
| | - Gillian F Meyer
- Department of Chemistry and Biochemistry, University of San Diego, 5998 Alcala Park, San Diego, California 92110, United States
| | - Timothy B Clark
- Department of Chemistry and Biochemistry, University of San Diego, 5998 Alcala Park, San Diego, California 92110, United States
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22
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Garcı́a-Cárceles J, Bahou KA, Bower JF. Recent Methodologies That Exploit Oxidative Addition of C–N Bonds to Transition Metals. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03341] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
| | - Karim A. Bahou
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, 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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23
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Huang Y, Chen H, Zheng W, Zeng Q. Cu2O-catalyzed C–S coupling of quaternary ammonium salts and sodium alkane-/arene-sulfinates. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152320] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Wang M, Shi Z. Methodologies and Strategies for Selective Borylation of C-Het and C-C Bonds. Chem Rev 2020; 120:7348-7398. [PMID: 32597639 DOI: 10.1021/acs.chemrev.9b00384] [Citation(s) in RCA: 177] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Organoborons have emerged as versatile building blocks in organic synthesis to achieve molecular diversity and as carboxylic acid bioisosteres with broad applicability in drug discovery. Traditionally, these compounds are prepared by the substitution of Grignard/lithium reagents with electrophilic boron species and Brown hydroboration. Recent developments have provided new routes for the efficient preparation of organoborons by applying reactions using chemical feedstocks with leaving groups. As compared to the previous methods that used organic halides (I, Br, and Cl), the direct borylation of less reactive C-Het and C-C bonds has become highly important to get efficiency and functional-group compatibility. This Review aims to provide a comprehensive overview of this topic, including (1) C-F bond borylation, (2) C-O bond borylation, (3) C-S bond borylation, (4) C-N bond borylation, and (5) C-C bond borylation. Considerable attention is given to the strategies and mechanisms involved. We expect that this Review will inspire chemists to discover more efficient transformations to expand this field.
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Affiliation(s)
- Minyan Wang
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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25
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Pulikottil FT, Pilli R, Suku RV, Rasappan R. Nickel-Catalyzed Cross-Coupling of Alkyl Carboxylic Acid Derivatives with Pyridinium Salts via C-N Bond Cleavage. Org Lett 2020; 22:2902-2907. [PMID: 32216317 DOI: 10.1021/acs.orglett.0c00554] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The electrophile-electrophile cross-coupling of carboxylic acid derivatives and alkylpyridinium salts via C-N bond cleavage is developed. The method is distinguished by its simplicity and steers us through a variety of functionalized ketones in good to excellent yields. Besides acid chlorides, carboxylic acids were also employed as acylating agents, which enabled us to incorporate acid-sensitive functional groups such as MOM, BOC, and acetal. Control experiments with TEMPO revealed a radical pathway.
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Affiliation(s)
- Feba Thomas Pulikottil
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Ramadevi Pilli
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Rohith Valavil Suku
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
| | - Ramesh Rasappan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram, Kerala 695551, India
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26
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27
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Liu L, Yu WQ, Huang T, Chen T. Palladium-catalyzed alkynylation of aromatic amines via in situ formed trimethylammonium salts. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151647] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Wang ZX, Yang B. Chemical transformations of quaternary ammonium salts via C–N bond cleavage. Org Biomol Chem 2020; 18:1057-1072. [DOI: 10.1039/c9ob02667c] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The reaction of quaternary ammonium salts via C–N bond cleavage to construct C–C, C–H and C–heteroatom bonds is summarized.
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Affiliation(s)
- Zhong-Xia Wang
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry
- University of Science and Technology of China
- Hefei
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Bo Yang
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry
- University of Science and Technology of China
- Hefei
- P. R. China
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29
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Wei D, Liu TM, Zhou B, Han B. Decarboxylative Borylation of mCPBA-Activated Aliphatic Acids. Org Lett 2019; 22:234-238. [DOI: 10.1021/acs.orglett.9b04218] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Dian Wei
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Tu-Ming Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Bo Zhou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Bing Han
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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30
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Srimontree W, Guo L, Rueping M. Hydride Transfer Enables the Nickel‐Catalyzed
ipso
‐Borylation and Silylation of Aldehydes. Chemistry 2019; 26:423-427. [DOI: 10.1002/chem.201904842] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Watchara Srimontree
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Lin Guo
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
| | - Magnus Rueping
- Institute of Organic ChemistryRWTH Aachen University Landoltweg 1 52074 Aachen Germany
- Kaust Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
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31
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Zhu ZF, Tu JL, Liu F. Ni-Catalyzed deaminative hydroalkylation of internal alkynes. Chem Commun (Camb) 2019; 55:11478-11481. [PMID: 31490479 DOI: 10.1039/c9cc05385a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A regioselective cis-hydroalkylation of internal alkynes with readily prepared Katritzky pyridinium salts for the synthesis of tri-substituted alkenes is described. This reaction is the first example of a metal-catalyzed hydroalkylation of an alkyne via C-N bond activation of an amine. The reaction demonstrates broad scope and functional group tolerance, allowing access to desired products with high diversity. Preliminary mechanistic studies indicate that a combination of an SET-initiated radical process and Ni-catalyzed alkylation could engage in the reaction, which makes it possible to bypass the traditional open-shell addition pathway.
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Affiliation(s)
- Ze-Fan Zhu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China.
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32
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Xu S, Zhang Z, Han C, Hu W, Xiao T, Yuan Y, Zhao J. Palladium-Catalyzed Coupling of Terminal Alkynes with Benzyl Ammonium Salts. J Org Chem 2019; 84:12192-12197. [DOI: 10.1021/acs.joc.9b01877] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Silin Xu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Zhenming Zhang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Chunyu Han
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Wenkai Hu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Tiwen Xiao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Yanan Yuan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
| | - Junfeng Zhao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, People’s Republic of China
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33
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Xu YN, Zhu MZ, Lin YK, Tian SK. Palladium-Catalyzed Highly Regioselective Aromatic Substitution of Benzylic Ammonium Salts with Amines. Org Lett 2019; 21:7169-7173. [DOI: 10.1021/acs.orglett.9b02820] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ya-Nan Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Meng-Zeng Zhu
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yu-Kun Lin
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shi-Kai Tian
- Hefei National Laboratory for Physical Sciences at the Microscale, Center for Excellence in Molecular Synthesis, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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34
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A SO2F2 mediated mild, practical, and gram-scale dehydroxylative transforming primary alcohols to quaternary ammonium salts. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.07.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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35
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He RD, Li CL, Pan QQ, Guo P, Liu XY, Shu XZ. Reductive Coupling between C–N and C–O Electrophiles. J Am Chem Soc 2019; 141:12481-12486. [DOI: 10.1021/jacs.9b05224] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Rong-De He
- State Key Laboratory of Applied Organic Chemistry
(SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China
| | - Chun-Ling Li
- State Key Laboratory of Applied Organic Chemistry
(SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China
| | - Qiu-Quan Pan
- State Key Laboratory of Applied Organic Chemistry
(SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China
| | - Peng Guo
- State Key Laboratory of Applied Organic Chemistry
(SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China
| | - Xue-Yuan Liu
- State Key Laboratory of Applied Organic Chemistry
(SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China
| | - Xing-Zhong Shu
- State Key Laboratory of Applied Organic Chemistry
(SKLAOC), College of Chemistry and Chemical Engineering, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China
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36
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Rand AW, Montgomery J. Catalytic reduction of aryl trialkylammonium salts to aryl silanes and arenes. Chem Sci 2019; 10:5338-5344. [PMID: 31191891 PMCID: PMC6540906 DOI: 10.1039/c9sc01083a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 04/22/2019] [Indexed: 11/30/2022] Open
Abstract
Aryl trialkylammonium salts serve as versatile substrates for nickel-catalyzed reductions, allowing access to functionalized arenes and aryl silanes.
A new approach for the reduction of aryl ammonium salts to arenes or aryl silanes using nickel catalysis is reported. This method displays excellent ligand-controlled selectivity based on the N-heterocyclic carbene (NHC) ligand employed. Utilizing a large NHC in non-polar solvents generates aryl silanes, while small NHCs in polar solvents promote reduction to arenes. Several classes of aryl silanes can be accessed from simple aniline building blocks, including those useful for cross-couplings, oxidations, and halogenations. The reaction conditions are mild, functional group tolerant, and provide efficient access to a variety of benzene derivatives.
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Affiliation(s)
- Alexander W Rand
- Department of Chemistry , University of Michigan , 930 N. University Ave. , Ann Arbor , MI 48109-1055 , USA .
| | - John Montgomery
- Department of Chemistry , University of Michigan , 930 N. University Ave. , Ann Arbor , MI 48109-1055 , USA .
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37
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Liao J, Basch CH, Hoerrner ME, Talley MR, Boscoe BP, Tucker JW, Garnsey MR, Watson MP. Deaminative Reductive Cross-Electrophile Couplings of Alkylpyridinium Salts and Aryl Bromides. Org Lett 2019; 21:2941-2946. [PMID: 30917282 DOI: 10.1021/acs.orglett.9b01014] [Citation(s) in RCA: 102] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A nickel-catalyzed reductive cross-coupling of alkylpyridinium salts and aryl bromides has been developed using Mn as the reductant. Both primary and secondary alkylpyridinium salts can be used, and high functional group and heterocycle tolerance is observed, including for protic groups. Mechanistic studies indicate the formation of an alkyl radical, and controlling its fate was key to the success of this reaction.
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Affiliation(s)
- Jennie Liao
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Corey H Basch
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Megan E Hoerrner
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Michael R Talley
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
| | - Brian P Boscoe
- Medicine Design, Pfizer Worldwide Research and Development , Groton , Connecticut 06340 , United States
| | - Joseph W Tucker
- Medicine Design, Pfizer Worldwide Research and Development , Groton , Connecticut 06340 , United States
| | - Michelle R Garnsey
- Medicine Design, Pfizer Worldwide Research and Development , Groton , Connecticut 06340 , United States
| | - Mary P Watson
- Department of Chemistry & Biochemistry , University of Delaware , Newark , Delaware 19716 , United States
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38
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Yang ZK, Xu NX, Wang C, Uchiyama M. Photoinduced C(sp 3 )-N Bond Cleavage Leading to the Stereoselective Syntheses of Alkenes. Chemistry 2019; 25:5433-5439. [PMID: 30829425 DOI: 10.1002/chem.201900886] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 03/01/2019] [Indexed: 11/12/2022]
Abstract
Herein we report a versatile Mizoroki-Heck-type photoinduced C(sp3 )-N bond cleavage reaction. Under visible-light irradiation (455 nm, blue LEDs) at room temperature, alkyl Katritzky salts react smoothly with alkenes in a 1:1 molar ratio in the presence of 1.0 mol % of commercially available photoredox catalyst without the need for any base, affording the corresponding alkyl-substituted alkenes in good yields with broad functional-group compatibility. Notably, the E/Z-selectivity of the alkene products can be controlled by an appropriate choice of photoredox catalyst.
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Affiliation(s)
- Ze-Kun Yang
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,Cluster for Pioneering Research (CPR), Advanced Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan
| | - Ning-Xin Xu
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Chao Wang
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,Cluster for Pioneering Research (CPR), Advanced Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,Cluster for Pioneering Research (CPR), Advanced Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan
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39
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Chen Q, Gao F, Tang H, Yao M, Zhao Q, Shi Y, Dang Y, Cao C. Sonogashira Cross-Coupling of Aryltrimethylammonium Salts. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00218] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Qianwei Chen
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Fengchen Gao
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Huiling Tang
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Miao Yao
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Qian Zhao
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Yanhui Shi
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Yanfeng Dang
- Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
| | - Changsheng Cao
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
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40
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Plunkett S, Basch CH, Santana SO, Watson MP. Harnessing Alkylpyridinium Salts as Electrophiles in Deaminative Alkyl-Alkyl Cross-Couplings. J Am Chem Soc 2019; 141:2257-2262. [PMID: 30682254 PMCID: PMC6434706 DOI: 10.1021/jacs.9b00111] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A Negishi cross-coupling of alkylpyridinium salts and alkylzinc halides has been developed. This is the first example of alkyl-alkyl bond formation via cross-coupling of an alkyl amine derivative with an unactivated alkyl group, and allows both primary and secondary alkylpyridinium salts to react with primary alkylzinc halides with high functional group tolerance. When combined with formation of the pyridinium salts from primary amines, this method enables the noncanonical transformation of NH2 groups into a wide range of alkyl substituents with broad functional group tolerance.
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Affiliation(s)
- Shane Plunkett
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Corey H. Basch
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Samantha O. Santana
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Mary P. Watson
- Department of Chemistry & Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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41
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Adams DJ, Johns B, Vedernikov AN. Methyl transfer reactivity of pentachloromethylplatinate(IV) anion with a series of N-nucleophiles. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2018.10.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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42
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Zhao C, Zha GF, Fang WY, Rakesh KP, Qin HL. Construction of Di(hetero)arylmethanes Through Pd-Catalyzed Direct Dehydroxylative Cross-Coupling of Benzylic Alcohols and Aryl Boronic Acids Mediated by Sulfuryl Fluoride (SO2
F2
). European J Org Chem 2019. [DOI: 10.1002/ejoc.201801888] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chuang Zhao
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
| | - Gao-Feng Zha
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
| | - Wan-Yin Fang
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
| | - K. P. Rakesh
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
| | - Hua-Li Qin
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry; Chemical Engineering and Life Science; Wuhan University of Technology; 430070 Wuhan Hubei Province People's Republic of China
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43
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Yang B, Wang ZX. Ni-Catalyzed C–P Coupling of Aryl, Benzyl, or Allyl Ammonium Salts with P(O)H Compounds. J Org Chem 2019; 84:1500-1509. [DOI: 10.1021/acs.joc.8b02926] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bo Yang
- 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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44
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Lekkala R, Lekkala R, Moku B, Rakesh KP, Qin HL. Applications of sulfuryl fluoride (SO2F2) in chemical transformations. Org Chem Front 2019. [DOI: 10.1039/c9qo00747d] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A number of novel methodologies concerning the chemical, biological and medicinal applications of sulfuryl fluoride (SO2F2) gas have dramatically improved year by year.
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Affiliation(s)
- Ravindar Lekkala
- State Key Laboratory of Silicate Materials for Architectures
- and School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
| | - Revathi Lekkala
- State Key Laboratory of Silicate Materials for Architectures
- and School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
| | - Balakrishna Moku
- State Key Laboratory of Silicate Materials for Architectures
- and School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
| | - K. P. Rakesh
- State Key Laboratory of Silicate Materials for Architectures
- and School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
| | - Hua-Li Qin
- State Key Laboratory of Silicate Materials for Architectures
- and School of Chemistry
- Chemical Engineering and Life Science
- Wuhan University of Technology
- Wuhan
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45
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Liu Y, Zhou Y, Li D, Chen H, Zhao J, Qu J. Iron-catalyzed boration of cinnamyl carbonates: a highly stereoselective approach to cyclopropylboronates. Org Chem Front 2019. [DOI: 10.1039/c8qo01163j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An efficient approach to cyclopropylboronates with excellent stereoselectivities via iron-catalyzed boration/cyclopropylation of cinnamyl carbonates is developed.
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Affiliation(s)
- Yang Liu
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Yuhan Zhou
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Dong Li
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Han Chen
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Jinfeng Zhao
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals
- School of Pharmaceutical Science and Technology
- Dalian University of Technology
- Dalian 116024
- P. R. China
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46
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Wang T, Guo J, Wang X, Guo H, Jia D, Wang H, Liu L. Cross coupling of benzylammonium salts with boronic acids using a well-defined N-heterocyclic carbene–palladium(ii) precatalyst. RSC Adv 2019; 9:5738-5741. [PMID: 35515917 PMCID: PMC9060798 DOI: 10.1039/c8ra10439e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 02/11/2019] [Indexed: 11/25/2022] Open
Abstract
N-heterocyclic carbene–palladium(ii)-catalyzed cross-coupling of benzylammonium salts with arylboronic acids for the synthesis of diarylmethane derivatives via C–N bond activation has been developed. Notably, in the presence of the easily prepared and bench-stable Pd-PEPPSI precatalyst, the Csp3–N bond activation of the benzylammonium salt even proceeded smoothly in isopropanol at room temperature. N-heterocyclic carbene–palladium(ii)-catalyzed cross-coupling of benzylammonium salts with arylboronic acids for the synthesis of diarylmethane derivatives via C–N bond activation has been developed.![]()
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Affiliation(s)
- Tao Wang
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals
- School of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- People's Republic of China
| | - Jiarui Guo
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals
- School of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- People's Republic of China
| | - Xiaojuan Wang
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals
- School of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- People's Republic of China
| | - Han Guo
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals
- School of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- People's Republic of China
| | - Dingli Jia
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals
- School of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- People's Republic of China
| | - Hengjin Wang
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals
- School of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- People's Republic of China
| | - Lantao Liu
- Henan Engineering Laboratory of Green Synthesis for Pharmaceuticals
- School of Chemistry and Chemical Engineering
- Shangqiu Normal University
- Shangqiu
- People's Republic of China
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47
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Liao LL, Cao GM, Ye JH, Sun GQ, Zhou WJ, Gui YY, Yan SS, Shen G, Yu DG. Visible-Light-Driven External-Reductant-Free Cross-Electrophile Couplings of Tetraalkyl Ammonium Salts. J Am Chem Soc 2018; 140:17338-17342. [PMID: 30518213 DOI: 10.1021/jacs.8b08792] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cross-electrophile couplings between two electrophiles are powerful and economic methods to generate C-C bonds in the presence of stoichiometric external reductants. Herein, we report a novel strategy to realize the first external-reductant-free cross-electrophile coupling via visible-light photoredox catalysis. A variety of tetraalkyl ammonium salts, bearing primary, secondary, and tertiary C-N bonds, undergo selective couplings with aldehydes/ketone and CO2. Notably, the in situ generated byproduct, trimethylamine, is efficiently utilized as the electron donor. Moreover, this protocol exhibits mild reaction conditions, low catalyst loading, broad substrate scope, good functional group tolerance, and facile scalability. Mechanistic studies indicate that benzyl radicals and anions might be generated as the key intermediates via photocatalysis, providing a new direction for cross-electrophile couplings.
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Affiliation(s)
- Li-Li Liao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , People's Republic of China
| | - Guang-Mei Cao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , People's Republic of China
| | - Jian-Heng Ye
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , People's Republic of China
| | - Guo-Quan Sun
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , People's Republic of China
| | - Wen-Jun Zhou
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , People's Republic of China
| | - Yong-Yuan Gui
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , People's Republic of China
| | - Si-Shun Yan
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , People's Republic of China
| | - Guo Shen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , People's Republic of China
| | - Da-Gang Yu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry , Sichuan University , Chengdu 610064 , People's Republic of China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Tianjin 300071 , People's Republic of China
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48
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Wang L, Sun W, Liu C. Cu-catalyzed deoxygenative gem-hydroborylation of aromatic aldehydes and ketones to access benzylboronic esters. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(18)63139-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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49
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Sandfort F, Strieth-Kalthoff F, Klauck FJR, James MJ, Glorius F. Deaminative Borylation of Aliphatic Amines Enabled by Visible Light Excitation of an Electron Donor-Acceptor Complex. Chemistry 2018; 24:17210-17214. [PMID: 30290050 DOI: 10.1002/chem.201804246] [Citation(s) in RCA: 164] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Indexed: 11/08/2022]
Abstract
A deaminative strategy for the borylation of aliphatic primary amines is described. Alkyl radicals derived from the single-electron reduction of redox-active pyridinium salts, which can be isolated or generated in situ, were borylated in a visible light-mediated reaction with bis(catecholato)diboron. No catalyst or further additives were required. The key electron donor-acceptor complex was characterized in detail by both experimental and computational investigations. The synthetic potential of this mild protocol was demonstrated through the late-stage functionalization of natural products and drug molecules.
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Affiliation(s)
- Frederik Sandfort
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Felix Strieth-Kalthoff
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Felix J R Klauck
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Michael J James
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
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50
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Hu J, Wang G, Li S, Shi Z. Selective C-N Borylation of Alkyl Amines Promoted by Lewis Base. Angew Chem Int Ed Engl 2018; 57:15227-15231. [PMID: 30253022 DOI: 10.1002/anie.201809608] [Citation(s) in RCA: 141] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 09/14/2018] [Indexed: 11/10/2022]
Abstract
An efficient method for the metal-free deaminative borylation of alkylamines, using bis(catecholato)diboron as the boron source, to directly synthesize various alkyl potassium trifluoroborate salts is introduced. The key to this high reactivity is the utilization of pyridinium salt activated alkylamines, with a catalytic amount of a bipyridine-type Lewis base as a promoter. This transformation shows good functional-group compatibility (e.g., it is unimpeded by the presence of a ketone, indole, internal alkene, or unactivated alkyl chloride) and can serve as a powerful synthetic tool for borylation of amine groups in complex compounds. Mechanistic experiments and computations suggest a mechanism in which the Lewis base activated B2 cat2 unit intercepts an alkyl radical generated by single-electron transfer (SET) from a boron-based reductant.
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Affiliation(s)
- Jiefeng Hu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Guoqiang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Shuhua Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
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