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Song YL, Li B, Xie ZB, Wang D, Sun HM. Iron-Catalyzed Oxidative Amination of Benzylic C(sp 3)-H Bonds with Anilines. J Org Chem 2021; 86:17975-17985. [PMID: 34860531 DOI: 10.1021/acs.joc.1c02311] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Iron-catalyzed oxidative amination of benzylic C(sp3)-H bonds with anilines bearing electron-withdrawing groups (EWGs) or electron-donating groups (EDGs) is realized based on simple variations of N-substituents on imidazolium cations in novel ionic Fe(III) complexes. The structural modification of the imidazolium cation resulted in regulation of the redox potential and the catalytic performance of the iron metal center. Using DTBP as oxidant, [HItBu][FeBr4] showed the highest catalytic activity for anilines bearing EWGs, while [HIPym][FeBr4] was more efficient for EDG-substituted anilines. This work provides alternative access to benzylamines with the advantages of both a wide substrate scope and iron catalysis.
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Affiliation(s)
- Yan-Ling Song
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, 199 Renai Street, Suzhou, Jiangsu 215123, China
| | - Bei Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, 199 Renai Street, Suzhou, Jiangsu 215123, China
| | - Zhen-Biao Xie
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, 199 Renai Street, Suzhou, Jiangsu 215123, China
| | - Dan Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, 199 Renai Street, Suzhou, Jiangsu 215123, China
| | - Hong-Mei Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, 199 Renai Street, Suzhou, Jiangsu 215123, China
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Bhim A, Sasmal S, Gopalakrishnan J, Natarajan S. Visible-Light-Activated C-C Bond Cleavage and Aerobic Oxidation of Benzyl Alcohols Employing BiMXO 5 (M=Mg, Cd, Ni, Co, Pb, Ca and X=V, P). Chem Asian J 2020; 15:3104-3115. [PMID: 32790062 DOI: 10.1002/asia.202000814] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/07/2020] [Indexed: 11/10/2022]
Abstract
The synthesis, structure, optical and photocatalytic studies of a family of compounds with the general formula, BiMXO5 ; M=Mg, Cd, Ni, Co, Pb, Ca and X=V, P is presented. The compounds were prepared by regular solid-state reaction of constituents in the temperature range of 720-810 °C for 24 h. The compounds were characterized by powder X-ray diffraction (PXRD) methods. The Rietveld refinement of the PXRD patterns have been carried out to establish the structure. The optical absorption spectra along with the colors in daylight have been explained employing the allowed d-d transition. In addition, the observed colors of some of the V5+ containing compounds were explained using metal-to-metal charge transfer (MMCT) from the partially filled transition-metal 3d orbitals to the empty 3d orbitals of V5+ ions. The near IR (NIR) reflectivity studies indicate that many compounds exhibit good NIR reflectivity, suggesting that these compounds can be employed as 'cool pigments'. The experimentally determined band gaps of the prepared compounds were found to be suitable to exploit them for visible light activated photocatalysis. Photocatalytic C-C bond cleavage of alkenes and aerobic oxidation of alcohols were investigated employing visible light, which gave good yields and selectivity. The present study clearly demonstrated the versatility of the Paganoite family of compounds (BiMXO5 ) towards new colored inorganic materials, visible-light photocatalysts and 'cool pigments'.
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Affiliation(s)
- Anupam Bhim
- Framework Solids Laboratory, Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, 560012, India
| | - Shreya Sasmal
- Framework Solids Laboratory, Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, 560012, India
| | - Jagannatha Gopalakrishnan
- Framework Solids Laboratory, Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, 560012, India
| | - Srinivasan Natarajan
- Framework Solids Laboratory, Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, 560012, India
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Muralirajan K, Kancherla R, Rueping M. Dehydrogenative Aromatization and Sulfonylation of Pyrrolidines: Orthogonal Reactivity in Photoredox Catalysis. Angew Chem Int Ed Engl 2018; 57:14787-14791. [DOI: 10.1002/anie.201808427] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 08/22/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Krishnamoorthy Muralirajan
- KAUST Catalysis Center (KCC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Rajesh Kancherla
- KAUST Catalysis Center (KCC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Magnus Rueping
- KAUST Catalysis Center (KCC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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Muralirajan K, Kancherla R, Rueping M. Dehydrogenative Aromatization and Sulfonylation of Pyrrolidines: Orthogonal Reactivity in Photoredox Catalysis. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808427] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Krishnamoorthy Muralirajan
- KAUST Catalysis Center (KCC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Rajesh Kancherla
- KAUST Catalysis Center (KCC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Magnus Rueping
- KAUST Catalysis Center (KCC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
- Institute of Organic Chemistry; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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Nilles CK, Herath HNK, Fanous H, Ugrinov A, Parent AR. Electrochemical properties and C-H bond oxidation activity of [Ru(tpy)(pyalk)Cl] + and [Ru(tpy)(pyalk)(OH)] . Dalton Trans 2018; 47:9701-9708. [PMID: 29978176 DOI: 10.1039/c8dt02260g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[Ru(tpy)(pyalk)Cl]Cl (pyalk = 2-(2'-pyridyl)-2-propanol) was synthesized and characterized crystallographically and electrochemically. Upon dissolution in water and acetonitrile, [Ru(tpy)(pyalk)Cl]Cl was found to form [Ru(tpy)(pyalk)Cl]+ and [Ru(tpy)(pyalk)(OH)]+, respectively. The Ru(ii/iii) couple of [Ru(tpy)(pyalk)Cl]+ was found to be relatively low compared to that of other Ru complexes in acetonitrile, but the Ru(iii/iv) couple was not significantly different than other Ru complexes bearing anionic ligands. Pourbaix diagrams were generated for [Ru(tpy)(phpy)(OH2)]+ (phpy = 2-phenylpyridine) and [Ru(tpy)(pyalk)(OH)]+ in water, and it was found that [Ru(tpy)(pyalk)(OH)]+ has a lower Ru(ii/iii) potential than [Ru(tpy)(phpy)(OH2)]+ under neutral to alkaline pH. [Ru(tpy)(pyalk)(OH)]+ was found to catalyze C-H bond hydroxylation of secondary alkanes and epoxidation of alkenes using cerium(iv) ammonium nitrate as the primary oxidant.
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Affiliation(s)
- Christian K Nilles
- Department of Chemistry and Biochemistry, North Dakota State University, PO Box 6050, Fargo, ND 58108-6050, USA.
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Lv Z, Wang H, Chen Z, Zou S, Zhu S, Lou C, Yin G. Non-redox metal ions promoted dehydrogenation of saturated C–C bond by a ruthenium catalyst with dioxygen activation. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2016.12.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Wang L, Yin H, Jabed MA, Hetu M, Wang C, Monro S, Zhu X, Kilina S, McFarland SA, Sun W. π-Expansive Heteroleptic Ruthenium(II) Complexes as Reverse Saturable Absorbers and Photosensitizers for Photodynamic Therapy. Inorg Chem 2017; 56:3245-3259. [PMID: 28263079 DOI: 10.1021/acs.inorgchem.6b02624] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Five heteroleptic tris-diimine ruthenium(II) complexes [RuL(N^N)2](PF6)2 (where L is 3,8-di(benzothiazolylfluorenyl)-1,10-phenanthroline and N^N is 2,2'-bipyridine (bpy) (1), 1,10-phenanthroline (phen) (2), 1,4,8,9-tetraazatriphenylene (tatp) (3), dipyrido[3,2-a:2',3'-c]phenazine (dppz) (4), or benzo[i]dipyrido[3,2-a:2',3'-c]phenazine (dppn) (5), respectively) were synthesized. The influence of π-conjugation of the ancillary ligands (N^N) on the photophysical properties of the complexes was investigated by spectroscopic methods and simulated by density functional theory (DFT) and time-dependent DFT. Their ground-state absorption spectra were characterized by intense absorption bands below 350 nm (ligand L localized 1π,π* transitions) and a featureless band centered at ∼410 nm (intraligand charge transfer (1ILCT)/1π,π* transitions with minor contribution from metal-to-ligand charge transfer (1MLCT) transition). For complexes 4 and 5 with dppz and dppn ligands, respectively, broad but very weak absorption (ε < 800 M-1 cm-1) was present from 600 to 850 nm, likely emanating from the spin-forbidden transitions to the triplet excited states. All five complexes showed red-orange phosphorescence at room temperature in CH2Cl2 solution with decreased lifetimes and emission quantum yields, as the π-conjugation of the ancillary ligands increased. Transient absorption (TA) profiles were probed in acetonitrile solutions at room temperature for all of the complexes. Except for complex 5 (which showed dppn-localized 3π,π* absorption with a long lifetime of 41.2 μs), complexes 1-4 displayed similar TA spectral features but with much shorter triplet lifetimes (1-2 μs). Reverse saturable absorption (RSA) was demonstrated for the complexes at 532 nm using 4.1 ns laser pulses, and the strength of RSA decreased in the order: 2 ≥ 1 ≈ 5 > 3 > 4. Complex 5 is particularly attractive as a broadband reverse saturable absorber due to its wide optical window (430-850 nm) and long-lived triplet lifetime in addition to its strong RSA at 532 nm. Complexes 1-5 were also probed as photosensitizing agents for in vitro photodynamic therapy (PDT). Most of them showed a PDT effect, and 5 emerged as the most potent complex with red light (EC50 = 10 μM) and was highly photoselective for melanoma cells (selectivity factor, SF = 13). Complexes 1-5 were readily taken up by cells and tracked by their intracellular luminescence before and after a light treatment. Diagnostic intracellular luminescence increased with increased π-conjugation of the ancillary N^N ligands despite diminishing cell-free phosphorescence in that order. All of the complexes penetrated the nucleus and caused DNA condensation in cell-free conditions in a concentration-dependent manner, which was not influenced by the identity of N^N ligands. Although the mechanism for photobiological activity was not established, complexes 1-5 were shown to exhibit potential as theranostic agents. Together the RSA and PDT studies indicate that developing new agents with long intrinsic triplet lifetimes, high yields for triplet formation, and broad ground-state absorption to near-infrared (NIR) in tandem is a viable approach to identifying promising agents for these applications.
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Affiliation(s)
- Li Wang
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108-6050, United States
| | - Huimin Yin
- Department of Chemistry, Acadia University , 6 University Avenue, Wolfville, NS B4P 2R6, Canada
| | - Mohammed A Jabed
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108-6050, United States
| | - Marc Hetu
- Department of Chemistry, Acadia University , 6 University Avenue, Wolfville, NS B4P 2R6, Canada
| | - Chengzhe Wang
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108-6050, United States
| | - Susan Monro
- Department of Chemistry, Acadia University , 6 University Avenue, Wolfville, NS B4P 2R6, Canada
| | - Xiaolin Zhu
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108-6050, United States
| | - Svetlana Kilina
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108-6050, United States
| | - Sherri A McFarland
- Department of Chemistry, Acadia University , 6 University Avenue, Wolfville, NS B4P 2R6, Canada.,Department of Chemistry and Biochemistry, University of North Carolina at Greensboro , Greensboro, North Carolina 27402-6170, United States
| | - Wenfang Sun
- Department of Chemistry and Biochemistry, North Dakota State University , Fargo, North Dakota 58108-6050, United States
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Liu XJ, Wang WP, Huo CD, Wang XC, Quan ZJ. Palladium-catalyzed dehydrogenation of dihydro-heterocycles using isoprene as the hydrogen acceptor without oxidants. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02038k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and general method for Pd-catalyzed dehydrogenative aromatization of dihydro-heteroatom compounds without external O2 and H2 is first described.
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Affiliation(s)
- Xiao-Jun Liu
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Wen-Peng Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Cong-De Huo
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Xi-Cun Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
| | - Zheng-Jun Quan
- Key Laboratory of Eco-Environment-Related Polymer Materials
- Ministry of Education
- Gansu Key Laboratory of Polymer Materials
- College of Chemistry and Chemical Engineering
- Northwest Normal University
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Wada T, Hiraide T, Miyazato Y. Water Oxidation Catalyzed by a Ruthenium Complex with an Ru-C Bond. ChemistrySelect 2016. [DOI: 10.1002/slct.201600716] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Tohru Wada
- Department of Chemistry, College of Science and Research Center for Smart Molecules; Rikkyo University, 3-34-1, Nishi-ikebukuro, Toshima-ku; Tokyo 171-8501 Japan
| | - Takahide Hiraide
- Department of Chemistry, College of Science and Research Center for Smart Molecules; Rikkyo University, 3-34-1, Nishi-ikebukuro, Toshima-ku; Tokyo 171-8501 Japan
| | - Yuji Miyazato
- School of Science and Engineering; Tokyo Denki University, Hatoyama, Hiki-gun; Saitama 350-0394 Japan
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10
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Zhong YW, Gong ZL, Shao JY, Yao J. Electronic coupling in cyclometalated ruthenium complexes. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.01.002] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Mitsuhashi R, Suzuki T, Sunatsuki Y. Four-Electron Oxidative Dehydrogenation Induced by Proton-Coupled Electron Transfer in Ruthenium(III) Complex with 2-(1,4,5,6-Tetrahydropyrimidin-2-yl)phenolate. Inorg Chem 2013; 52:10183-90. [DOI: 10.1021/ic401667v] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ryoji Mitsuhashi
- Department
of Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama
700-8530, Japan
| | - Takayoshi Suzuki
- Department
of Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama
700-8530, Japan
| | - Yukinari Sunatsuki
- Department
of Chemistry, Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-naka, Kita-ku, Okayama
700-8530, Japan
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Chaudhuri S, Patra SC, Saha P, Saha Roy A, Maity S, Bera S, Saha Sardar P, Ghosh S, Weyhermüller T, Ghosh P. Zinc(ii), iron(ii/iii) and ruthenium(ii) complexes of o-phenylenediamine derivatives: oxidative dehydrogenation and photoluminescence. Dalton Trans 2013; 42:15028-42. [DOI: 10.1039/c3dt51771c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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