1
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Chen W, Xia J, Huang J, Zhou L, Wu G. Chemoselective C-H Hydroxylation and Borylation of N-Phenylbenzamides using BBr 3. Org Lett 2024. [PMID: 38780154 DOI: 10.1021/acs.orglett.4c01244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
A novel metal-free chemoselective C-H hydroxylation and borylation of N-phenylbenzamides using BBr3 is described. The protocol generates the corresponding phenols and arylboronic esters in moderate to excellent yields under mild conditions with brilliant chemoselectivity. Additionally, this strategy can be realized in one pot, and several potential bioactive derivatives can be synthesized efficiently. Density functional theory calculations certify that the preferred pathway for this metal-free C-H hydroxylation process is the formation of a five-membered boracycle.
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Affiliation(s)
- Weiming Chen
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, P. R. China
| | - Jiatao Xia
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, P. R. China
| | - Jiuzhong Huang
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, P. R. China
| | - Lianlian Zhou
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, P. R. China
| | - Gaorong Wu
- School of Pharmaceutical Sciences, Gannan Medical University, Ganzhou 341000, P. R. China
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2
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Kirse TM, Maisuls I, Spierling L, Hepp A, Kösters J, Strassert CA. One Dianionic Luminophore with Three Coordination Modes Binding Four Different Metals: Toward Unexpectedly Phosphorescent Transition Metal Complexes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306801. [PMID: 38161218 PMCID: PMC10953592 DOI: 10.1002/advs.202306801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 12/08/2023] [Indexed: 01/03/2024]
Abstract
This work reports on a battery of coordination compounds featuring a versatile dianionic luminophore adopting three different coordination modes (mono, bi, and tridentate) while chelating Pd(II), Pt(II), Au(III), and Hg(II) centers. An in-depth structural characterization of the ligand precursor (H2 L) and six transition metal complexes ([HLPdCNtBu], [LPtCl], [LPtCNtBu], [LPtCNPhen], [HLHgCl], and [LAuCl]) is presented. The influence of the cations and coordination modes of the luminophore and co-ligands on the photophysical properties (including photoluminescence quantum yields (ΦL ), excited state lifetimes (τ), and average (non-)radiative rate constants) are evaluated at various temperatures in different phases. Five complexes show interesting photophysical properties at room temperature (RT) in solution. Embedment in frozen glassy matrices at 77 K significantly boosts their luminescence by suppressing radiationless deactivation paths. Thus, the Pt(II)-based compounds provide the highest efficiencies, with slight variations upon exchange of the ancillary ligand. In the case of [HLPdCNtBu], both ΦL and τ increase over 30-fold as compared to RT. Furthermore, the Hg(II) complex achieves, for the first time in its class, a ΦL exceeding 60% and millisecond-range lifetimes. This demonstrates that a judicious ligand design can pave the way toward versatile coordination compounds with tunable excited state properties.
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Affiliation(s)
- Thomas M. Kirse
- Institut für Anorganische und Analytische ChemieUniversität MünsterCorrensstr. 28/3048149MünsterGermany
- CiMiCSoN and CeNTechUniversität MünsterHeisenbergstr. 1148149MünsterGermany
| | - Iván Maisuls
- Institut für Anorganische und Analytische ChemieUniversität MünsterCorrensstr. 28/3048149MünsterGermany
- CiMiCSoN and CeNTechUniversität MünsterHeisenbergstr. 1148149MünsterGermany
| | - Leander Spierling
- Institut für Anorganische und Analytische ChemieUniversität MünsterCorrensstr. 28/3048149MünsterGermany
- CiMiCSoN and CeNTechUniversität MünsterHeisenbergstr. 1148149MünsterGermany
| | - Alexander Hepp
- Institut für Anorganische und Analytische ChemieUniversität MünsterCorrensstr. 28/3048149MünsterGermany
| | - Jutta Kösters
- Institut für Anorganische und Analytische ChemieUniversität MünsterCorrensstr. 28/3048149MünsterGermany
| | - Cristian A. Strassert
- Institut für Anorganische und Analytische ChemieUniversität MünsterCorrensstr. 28/3048149MünsterGermany
- CiMiCSoN and CeNTechUniversität MünsterHeisenbergstr. 1148149MünsterGermany
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3
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Shinde GH, Sundén H. Boron-Mediated Regioselective Aromatic C-H Functionalization via an Aryl BF 2 Complex. Chemistry 2023; 29:e202203505. [PMID: 36383388 DOI: 10.1002/chem.202203505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 11/17/2022]
Abstract
An efficient regioselective functionalization of 2-aryl-heteroarenes and aryl aldehydes via an azaaryl BF2 complex has been developed. Mechanistically the reaction comprises fluoride to bromide ligand exchange on an aryl boron species and consecutive C-B bond cleavage to deliver a broad range of functionalized products. The reaction is high yielding, has a broad substrate scope where several different heteroarenes can be functionalized with chloro, bromo, iodo, hydroxyl, amine and BF2 in a highly regioselective fashion. The method can be applied for late-stage functionalization or for rapid skeleton remodeling with for instance cross-couplings.
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Affiliation(s)
- Ganesh H Shinde
- Department of Chemistry and Molecular Biology, University of Gothenburg, 412 96, Gothenburg, Sweden
| | - Henrik Sundén
- Department of Chemistry and Molecular Biology, University of Gothenburg, 412 96, Gothenburg, Sweden.,Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96, Gothenburg, Sweden
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4
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Das Adhikari GK, Mohanty SR, Banjare SK, Prusty N, Murmu G, Ravikumar PC. Annulation of Indole-2-Carboxamides with Bicycloalkenes Catalyzed by Ru(II) at Room Temperature: An Easy Access to β-Carboline-1-one Derivatives under Mild Conditions. J Org Chem 2023; 88:952-959. [PMID: 36606375 DOI: 10.1021/acs.joc.2c02351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Herein, we report the annulation of indole-2-carboxamides with bicycloalkenes, to synthesize β-carboline-1-one derivatives under mild conditions. The commercially available ruthenium catalyst was used for the reaction. This reaction tolerates a wide range of functional groups and affords a good yield of β-carboline-1-one derivatives. A reversible cyclometalation pathway was found to be operative in the mechanistic study.
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Affiliation(s)
- Gopal Krushna Das Adhikari
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Smruti Ranjan Mohanty
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Namrata Prusty
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Gajiram Murmu
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Ponneri C Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha India.,Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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5
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Mohanty SR, Prusty N, Nanda T, Banjare SK, Ravikumar PC. Pyridone Directed Ru-Catalyzed Olefination of sp2(C-H) Bond Using Michael Acceptors: Creation of Drug Analogues. J Org Chem 2022; 87:6189-6201. [PMID: 35467333 DOI: 10.1021/acs.joc.2c00428] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Herein, the ruthenium-catalyzed regioselective sp2(C-H) monoalkenylation of N-arylpyridones has been demonstrated, where the pyridone was utilized as a weakly coordinating directing group. Importantly, the current methodology has been effectively applied to the synthesis of many drug analogues such as pirfenidone, naproxen, ibuprofen, geraniol, umbelliferone, pregnenolone, and estrone. This methodology tolerates a wide range of functional groups and yields up to 93% yield. A six-membered ruthenium complex was also detected by HRMS.
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Affiliation(s)
- Smruti Ranjan Mohanty
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, 752050 Odisha, India.,Homi Bhabha National Institute (HBNI), Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Namrata Prusty
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, 752050 Odisha, India.,Homi Bhabha National Institute (HBNI), Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Tanmayee Nanda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, 752050 Odisha, India.,Homi Bhabha National Institute (HBNI), Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Shyam Kumar Banjare
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, 752050 Odisha, India.,Homi Bhabha National Institute (HBNI), Training School Complex, Anushaktinagar, Mumbai 400094, India
| | - Ponneri C Ravikumar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, 752050 Odisha, India.,Homi Bhabha National Institute (HBNI), Training School Complex, Anushaktinagar, Mumbai 400094, India
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6
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Hylland KT, Schmidtke IL, Wragg DS, Nova A, Tilset M. Synthesis of substituted (N,C) and (N,C,C) Au(III) complexes: the influence of sterics and electronics on cyclometalation reactions. Dalton Trans 2022; 51:5082-5097. [PMID: 35262546 DOI: 10.1039/d2dt00371f] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclometalated Au(III) complexes are of interest due to their catalytic, medicinal, and photophysical properties. Herein, we describe the synthesis of derivatives of the type (N,C)Au(OAcF)2 (OAcF = trifluoroacetate) and (N,C,C)AuOAcF by a cyclometalation route, where (N,C) and (N,C,C) are chelating 2-arylpyridine ligands. The scope of the synthesis is explored by substituting the 2-arylpyridine core with electron donor or acceptor substituents at one or both rings. Notably, a variety of functionalized Au(III) complexes can be obtained in one step from the corresponding ligand and Au(OAc)3, eliminating the need for organomercury intermediates, which is commonly reported for similar syntheses. The influence of substituents in the ligand backbone on the resulting complexes was assessed using DFT calculations, 15N NMR spectroscopy and single-crystal X-ray diffraction analysis. A correlation between the electronic properties of the (N,C) ligands and their ability to undergo cyclometalation was found from experimental studies combined with natural charge analysis, suggesting the cyclometalation at Au(III) to take place via an electrophilic aromatic substitution-type mechanism. The formation of Au(III) pincer complexes from tridentate (N,C,C) ligands was investigated by synthesis and DFT calculations, in order to assess the feasibility of C(sp3)-H bond activation as a synthetic pathway to (N,C,C) cyclometalated Au(III) complexes. It was found that C(sp3)-H bond activation is feasible for ligands containing different alkyl groups (isopropyl and ethyl), although the C-H activation is less energetically favored compared to a ligand containing tert-butyl groups.
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Affiliation(s)
- Knut T Hylland
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway. .,Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - Inga L Schmidtke
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway. .,Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - David S Wragg
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway. .,Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - Ainara Nova
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway. .,Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway.,Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, N-0315 Oslo, Norway.,UiT-The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Mats Tilset
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway. .,Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway.,Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, N-0315 Oslo, Norway
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7
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Vanga M, Sahoo A, Lalancette RA, Jäkle F. Linear Extension of Anthracene via B←N Lewis Pair Formation: Effects on Optoelectronic Properties and Singlet O
2
Sensitization. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202113075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mukundam Vanga
- Department of Chemistry Rutgers University-Newark 73 Warren Street Newark NJ 07102 USA
| | - Ashutosh Sahoo
- Department of Chemistry Rutgers University-Newark 73 Warren Street Newark NJ 07102 USA
| | - Roger A. Lalancette
- Department of Chemistry Rutgers University-Newark 73 Warren Street Newark NJ 07102 USA
| | - Frieder Jäkle
- Department of Chemistry Rutgers University-Newark 73 Warren Street Newark NJ 07102 USA
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8
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Vanga M, Sahoo A, Lalancette RA, Jäkle F. Linear Extension of Anthracene via B←N Lewis Pair Formation: Effects on Optoelectronic Properties and Singlet O 2 Sensitization. Angew Chem Int Ed Engl 2021; 61:e202113075. [PMID: 34847268 DOI: 10.1002/anie.202113075] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Indexed: 11/12/2022]
Abstract
The functionalization of polycyclic aromatic hydrocarbons (PAHs) via B←N Lewis pair formation offers an opportunity to judiciously fine-tune the structural features and optoelectronic properties, to suit the demands of applications in organic electronic devices, bioimaging, and as sensitizers for singlet oxygen generation. We demonstrate that the N-directed electrophilic borylation of 2,6-di(pyrid-2-yl)anthracene offers access to linearly extended acene derivatives Py-BR (R=Et, Ph, C6 F5 ). In comparison to indeno-fused 9,10-diphenylanthracene, the formal "BN for CC" replacement in Py-BR selectively lowers the LUMO, resulting in a much reduced HOMO-LUMO gap. An even more extended conjugated system with seven six-membered rings in a row (Qu-BEt) is obtained by borylation of 2,6-di(quinolin-8-yl)anthracene. Fluorinated Py-BPf shows particularly advantageous properties, including relatively lower-lying HOMO and LUMO levels, strong yellow-green fluorescence, and effective singlet oxygen sensitization, while resisting self-sensitized conversion to its endoperoxide.
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Affiliation(s)
- Mukundam Vanga
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ, 07102, USA
| | - Ashutosh Sahoo
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ, 07102, USA
| | - Roger A Lalancette
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ, 07102, USA
| | - Frieder Jäkle
- Department of Chemistry, Rutgers University-Newark, 73 Warren Street, Newark, NJ, 07102, USA
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9
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Panigrahi D, Subramaniyan V, Mani G. Synthesis and structural characterizations of Pd(II) complexes bearing the new hexahydropyrimidine and tetrahydropyrimidinium based bis(pyrazole) ligands with DFT studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.129949] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Mousa AH, Chakrabarti K, Isapour G, Bendix J, Wendt OF. Enhancing the Stability of Aromatic PCN Pincer Nickel Complexes by Incorporation of Pyridine as the Nitrogen Side Arm. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Abdelrazek H. Mousa
- Centre for Analysis and Synthesis Department of Chemistry Lund University P. O. Box 124 221 00 Lund Sweden
| | - Kaushik Chakrabarti
- Centre for Analysis and Synthesis Department of Chemistry Lund University P. O. Box 124 221 00 Lund Sweden
| | - Ghodsieh Isapour
- Centre for Analysis and Synthesis Department of Chemistry Lund University P. O. Box 124 221 00 Lund Sweden
| | - Jesper Bendix
- Department of Chemistry University of Copenhagen Universitetsparken 5 2100 Copenhagen Denmark
| | - Ola F. Wendt
- Centre for Analysis and Synthesis Department of Chemistry Lund University P. O. Box 124 221 00 Lund Sweden
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11
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Kapoor M, Singh A, Sharma K, Hua Hsu M. Site‐Selective C(
sp
3
)−H and C(
sp
2
)−H Functionalization of Amines Using a Directing‐Group‐Guided Strategy. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000689] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Mohit Kapoor
- Chitkara University Institute of Engineering and Technology Chitkara University Punjab India 140401
| | - Adhish Singh
- Chitkara University Institute of Engineering and Technology Chitkara University Punjab India 140401
| | - Kirti Sharma
- Chitkara University Institute of Engineering and Technology Chitkara University Punjab India 140401
| | - Ming Hua Hsu
- Department of Chemistry National Changhua University of Education Taiwan 500, R.O.C Changhua
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12
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Iqbal SA, Pahl J, Yuan K, Ingleson MJ. Intramolecular (directed) electrophilic C-H borylation. Chem Soc Rev 2020; 49:4564-4591. [PMID: 32495755 DOI: 10.1039/c9cs00763f] [Citation(s) in RCA: 116] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
The intramolecular C-H borylation of (hetero)arenes and alkenes using electrophilic boranes is a powerful transition metal free methodology for forming C-B bonds. These C-H borylation reactions are preceded by intermolecular bond (both dative and covalent) formation, with examples proceeding via initial C-B and N-B bond formation dominating this field thus both are discussed in depth herein. Less prevalent intramolecular electrophilic C-H borylation reactions that proceed by intermolecular O-B, S-B and P-B bond formation are also summarised. Mechanistic studies are presented that reveal two mechanisms for C-H borylation, (i) electrophilic aromatic substitution (prevalent with B-X electrophiles); (ii) σ-bond metathesis mediated (prevalent with B-H and B-R electrophiles). To date, intramolecular electrophilic C-H borylation is utilised mainly for accessing boron containing conjugated organic materials, however recent developments, summarized herein alongside early studies, have highlighted the applicability of this methodology for forming synthetically versatile organo-boronate esters and boron containing bioactives. The multitude of synthetic procedures reported for intramolecular electrophilic C-H borylation contain many common features and this enables key requirements for successful C-H borylation and the factors effecting regioselectivity and substrate scope to be identified, discussed and summarized.
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Affiliation(s)
- S A Iqbal
- EastCHEM School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK.
| | - J Pahl
- EastCHEM School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK.
| | - K Yuan
- EastCHEM School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK.
| | - M J Ingleson
- EastCHEM School of Chemistry, University of Edinburgh, Edinburgh, EH9 3FJ, UK.
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13
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Mokesch S, Cseh K, Geisler H, Hejl M, Klose MHM, Roller A, Meier-Menches SM, Jakupec MA, Kandioller W, Keppler BK. Investigations on the Anticancer Potential of Benzothiazole-Based Metallacycles. Front Chem 2020; 8:209. [PMID: 32318543 PMCID: PMC7147246 DOI: 10.3389/fchem.2020.00209] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 03/05/2020] [Indexed: 11/13/2022] Open
Abstract
A series of 2-phenylbenzothiazole derivatives and their corresponding organometallic ruthenium(II) and osmium(II) complexes were synthesized, designed to exploit both, the attributes of the half-sandwich transition metal scaffold and the bioactivity spectrum of the applied 2-phenylbenzothiazoles. All synthesized compounds were characterized via standard analytical methods. The obtained organometallics showed antiproliferative activity in the low μM range and are thus at least an order of magnitude more potent than the free ligands. ESI-MS measurements showed that the examined compounds were stable in aqueous solution over 48 h. Additionally, their binding preferences to small biomolecules, their cellular accumulation and capacity of inducing apoptosis/necrosis were investigated. Based on the fluorescence properties of the selected ligand and the corresponding ruthenium complex, their subcellular distribution was studied by fluorescence microscopy, revealing a high degree of colocalization with acidic organelles of cancer cells.
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Affiliation(s)
- Stephan Mokesch
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Klaudia Cseh
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Heiko Geisler
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Michaela Hejl
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Matthias H. M. Klose
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Alexander Roller
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Samuel M. Meier-Menches
- Research Cluster Translational Cancer Therapy Research, University of Vienna, Vienna, Austria
- Department of Analytical Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Michael A. Jakupec
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
- Research Cluster Translational Cancer Therapy Research, University of Vienna, Vienna, Austria
| | - Wolfgang Kandioller
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
- Research Cluster Translational Cancer Therapy Research, University of Vienna, Vienna, Austria
| | - Bernhard K. Keppler
- Institute of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
- Research Cluster Translational Cancer Therapy Research, University of Vienna, Vienna, Austria
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14
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Prévost S. Regioselective C−H Functionalization of Naphthalenes: Reactivity and Mechanistic Insights. Chempluschem 2020; 85:476-486. [DOI: 10.1002/cplu.202000005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 02/29/2020] [Indexed: 12/25/2022]
Affiliation(s)
- Sébastien Prévost
- Laboratoire de Synthèse Organique Ecole Polytechnique ENSTA CNRSInstitut Polytechnique de Paris 828 boulevard des Maréchaux 91120 Palaiseau France
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15
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Iqbal SA, Cid J, Procter RJ, Uzelac M, Yuan K, Ingleson MJ. Acyl-Directed ortho-Borylation of Anilines and C7 Borylation of Indoles using just BBr 3. Angew Chem Int Ed Engl 2019; 58:15381-15385. [PMID: 31461213 PMCID: PMC6856876 DOI: 10.1002/anie.201909786] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Indexed: 01/04/2023]
Abstract
Indoles are privileged heterocycles found in many biologically active pharmaceuticals and natural products. However, the selective functionalization of the benzenoid moiety in indoles in preference to the more reactive pyrrolic unit is a significant challenge. Herein we report that N-acyl directing groups enable the C7-selective C-H borylation of indoles using just BBr3 . This transformation shows some functional-group tolerance and notably proceeds with C6 substituted indoles. The directing group can be readily removed in situ and the products isolated as the pinacol boronate esters. Acyl-directed electrophilic borylation can be extended to carbazoles and anilines with excellent ortho selectivity. 4-amino-indoles are amenable to this process, with acyl group installation and directed electrophilic C-H borylation enabling selective formation of C5-BPin-indoles.
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Affiliation(s)
- Saqib A. Iqbal
- School of ChemistryUniversity of EdinburghEdinburghEH9 3FJUK
| | - Jessica Cid
- Dept. of ChemistryUniversity of ManchesterManchesterM13 9PLUK
| | | | - Marina Uzelac
- School of ChemistryUniversity of EdinburghEdinburghEH9 3FJUK
| | - Kang Yuan
- School of ChemistryUniversity of EdinburghEdinburghEH9 3FJUK
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16
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Majeed MH, Shayesteh P, Tunå P, Persson AR, Gritcenko R, Wallenberg LR, Ye L, Hulteberg C, Schnadt J, Wendt OF. Directed C-H Halogenation Reactions Catalysed by Pd II Supported on Polymers under Batch and Continuous Flow Conditions. Chemistry 2019; 25:13591-13597. [PMID: 31418957 DOI: 10.1002/chem.201902949] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 08/14/2019] [Indexed: 12/21/2022]
Abstract
A new generation of N-heterocyclic carbene palladium(II) complexes containing vinyl groups in different positions in the backbone of the N-heterocycle have been developed. The fully characterised monomers were copolymerised with divinylbenzene to fabricate robust polymer supported NHC-PdII complexes and these polymers were applied as heterogeneous catalysts in directed C-H halogenation of arenes with a pyridine-type directing group. The catalysts demonstrated medium-high catalytic activity with up to 90 % conversion and 100 % selectivity in chlorination. They are heterogeneous and recyclable (at least six times) with no significant leaching of palladium in batch mode catalysis. The best catalyst was also applied under continuous flow conditions where it disclosed an exceptional activity (90 % conversion) and 100 % selectivity for the mono-halogenated product for at least six days, with no leaching of palladium, no loss of activity and an ability to maintain the original oxidation state of PdII .
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Affiliation(s)
- Maitham H Majeed
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, Box 124, 221 00, Lund, Sweden
| | - Payam Shayesteh
- Division of Synchrotron Radiation Research, Department of Physics, Lund University, Box 118, 221 00, Lund, Sweden
| | - Per Tunå
- Department of Chemical Engineering, Lund University, Box 124, 221 00, Lund, Sweden
| | - Axel R Persson
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, Box 124, 221 00, Lund, Sweden.,National Centre for High Resolution Electron Microscopy (nCHREM), Lund University, Box 124, 221 00, Lund, Sweden
| | - Roman Gritcenko
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, Box 124, 221 00, Lund, Sweden
| | - L Reine Wallenberg
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, Box 124, 221 00, Lund, Sweden.,National Centre for High Resolution Electron Microscopy (nCHREM), Lund University, Box 124, 221 00, Lund, Sweden
| | - Lei Ye
- Centre for Applied Life Sciences, Department of Chemistry, Lund University, Box 124, 221 00, Lund, Sweden
| | - Christian Hulteberg
- Department of Chemical Engineering, Lund University, Box 124, 221 00, Lund, Sweden
| | - Joachim Schnadt
- Division of Synchrotron Radiation Research, Department of Physics, Lund University, Box 118, 221 00, Lund, Sweden
| | - Ola F Wendt
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, Box 124, 221 00, Lund, Sweden
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17
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Iqbal SA, Cid J, Procter RJ, Uzelac M, Yuan K, Ingleson MJ. Acyl‐Directed
ortho
‐Borylation of Anilines and C7 Borylation of Indoles using just BBr
3. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201909786] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Saqib A. Iqbal
- School of Chemistry University of Edinburgh Edinburgh EH9 3FJ UK
| | - Jessica Cid
- Dept. of Chemistry University of Manchester Manchester M13 9PL UK
| | | | - Marina Uzelac
- School of Chemistry University of Edinburgh Edinburgh EH9 3FJ UK
| | - Kang Yuan
- School of Chemistry University of Edinburgh Edinburgh EH9 3FJ UK
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18
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Bala M, Ratnam A, Kumar R, Ghosh K. Naphthyl C8-H hydrogen activation and synthesis of organometallic ruthenium complex: Crystal structure of hydride intermediates and catalytic transfer hydrogenation. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2018.10.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Oda S, Abe H, Yasuda N, Hatakeyama T. Synthesis of Tetracoordinate Boron‐Fused Benzoaceanthrylene Analogs via Tandem Electrophilic C−H Borylation. Chem Asian J 2019; 14:1657-1661. [DOI: 10.1002/asia.201801682] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/07/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Susumu Oda
- Department of Chemistry, School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Hiroaki Abe
- Department of Chemistry, School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI) 1-1-1, Kouto Sayo-cho, Sayo-gun Hyogo 679-5198 Japan
| | - Takuji Hatakeyama
- Department of Chemistry, School of Science and TechnologyKwansei Gakuin University 2-1 Gakuen Sanda Hyogo 669-1337 Japan
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20
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Guo Z, Gong D, Hu B, Chen D. Regioselectivity in C–H activation: Reactions of N-heterocyclic indenes with Ru3(CO)12. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.11.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Jeong T, Lee SH, Chun R, Han S, Han SH, Jeon YU, Park J, Yoshimitsu T, Mishra NK, Kim IS. Ru(II)-Catalyzed C-H Aminocarbonylation of N-(Hetero)aryl-7-azaindoles with Isocyanates. J Org Chem 2018; 83:4641-4649. [PMID: 29616808 DOI: 10.1021/acs.joc.8b00388] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The ruthenium(II)-catalyzed C-H aminocarbonylation of N-(hetero)aryl-7-azaindoles with isocyanates is described. The excellent site selectivity at the ortho-position within the N-(hetero)aryl ring was observed to provide ortho-amidated N-(hetero)aryl-7-azaindoles under the mild reaction conditions. The resulting 7-azaindole derivatives can be readily transformed into 7-azaindoles containing carboxylic acid and alkyl amine functional groups.
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Affiliation(s)
- Taejoo Jeong
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea.,Graduate School of Medicine, Dentistry and Pharmaceutical Science , Okayama University , Okayama 700-8530 , Japan
| | - Suk Hun Lee
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Rina Chun
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Sangil Han
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Sang Hoon Han
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Yeong Uk Jeon
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea.,Division of Bio & Drug Discovery , Korea Research Institute of Chemical Technology , Daejeon 34114 , Republic of Korea
| | - Jihye Park
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - Takehiko Yoshimitsu
- Graduate School of Medicine, Dentistry and Pharmaceutical Science , Okayama University , Okayama 700-8530 , Japan
| | - Neeraj Kumar Mishra
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
| | - In Su Kim
- School of Pharmacy , Sungkyunkwan University , Suwon 16419 , Republic of Korea
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22
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Gramage-Doria R, Achelle S, Bruneau C, Robin-le Guen F, Dorcet V, Roisnel T. Ruthenium(II)-Catalyzed C-H (Hetero)Arylation of Alkenylic 1,n-Diazines (n = 2, 3, and 4): Scope, Mechanism, and Application in Tandem Hydrogenations. J Org Chem 2018; 83:1462-1477. [PMID: 29319315 DOI: 10.1021/acs.joc.7b03024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A general ruthenium(II)-catalyzed methodology enabling the (hetero)arylation of alkenylic C-H bonds utilizing a series of synthetically appealing diazines as directing groups is presented. Despite the presence of additional nitrogen lone pairs remote from the C-H bond activation site, which could eventually poison the catalyst, the reaction times are short (3 h), thus being suitable for selective double C-H bond arylation. Mixtures of E:Z isomeric products were observed in some cases, which were further hydrogenated in a tandem manner in the presence of the remaining ruthenium catalyst from the first step, representing an alternative approach to more difficult C(sp3)-H bond functionalization. According to mechanistic studies, the unexpected E:Z product formation seems to occur by thermal C═C bond isomerization after the reductive elimination step.
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Affiliation(s)
- Rafael Gramage-Doria
- Univ Rennes , CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Sylvain Achelle
- Univ Rennes , CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Christian Bruneau
- Univ Rennes , CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Françoise Robin-le Guen
- Univ Rennes , CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Vincent Dorcet
- Univ Rennes , CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
| | - Thierry Roisnel
- Univ Rennes , CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France
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23
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24
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Belmonte Sánchez E, Iglesias MJ, el Hajjouji H, Roces L, García-Granda S, Villuendas P, Urriolabeitia EP, López Ortiz F. Cycloaurated Phosphinothioic Amide Complex as a Precursor of Gold(I) Nanoparticles: Efficient Catalysts for A3 Synthesis of Propargylamines under Solvent-Free Conditions. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00102] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Eva Belmonte Sánchez
- Área
de Química Orgánica, Universidad de Almería, Ctra.
Sacramento s/n, 04120 Almería, Spain
| | - María José Iglesias
- Área
de Química Orgánica, Universidad de Almería, Ctra.
Sacramento s/n, 04120 Almería, Spain
| | - Hajar el Hajjouji
- Área
de Química Orgánica, Universidad de Almería, Ctra.
Sacramento s/n, 04120 Almería, Spain
| | - Laura Roces
- Departamento
de Química Física y Analítica, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Spain
| | - Santiago García-Granda
- Departamento
de Química Física y Analítica, Universidad de Oviedo, C/Julián Clavería 8, 33006 Oviedo, Spain
| | - Pedro Villuendas
- Instituto
de Síntesis Química y Catálisis Homogénea,
ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Esteban P. Urriolabeitia
- Instituto
de Síntesis Química y Catálisis Homogénea,
ISQCH, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Fernando López Ortiz
- Área
de Química Orgánica, Universidad de Almería, Ctra.
Sacramento s/n, 04120 Almería, Spain
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25
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Gong D, Hu B, Shi J, Ma P, Wang B, Chen D. Synthesis of Diruthenium Complexes Derived from Pyridyl-Substituted Indenes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dawei Gong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemical Engineering & Technology, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Bowen Hu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemical Engineering & Technology, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Jing Shi
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemical Engineering & Technology, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Peipei Ma
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemical Engineering & Technology, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
| | - Baiquan Wang
- State
Key Laboratory of Elemento-Organic Chemistry, College of Chemistry,
and Collaborative Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
| | - Dafa Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemical Engineering & Technology, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
- State
Key Laboratory of Elemento-Organic Chemistry, College of Chemistry,
and Collaborative Innovation Center of Chemical Science and Engineering
(Tianjin), Nankai University, Tianjin 300071, People’s Republic of China
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26
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Ahlstrand DA, Polukeev AV, Marcos R, Ahlquist MSG, Wendt OF. Csp 3 -H Activation without Chelation Assistance in an Iridium Pincer Complex Forming Cyclometallated Products. Chemistry 2017; 23:1748-1751. [PMID: 27982473 DOI: 10.1002/chem.201604469] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Indexed: 01/07/2023]
Abstract
Cyclometallation of 8-methylquinoline and 2-(dimethylamino)-pyridine in an iridium-based pincer complex is described. The C-H activation of 2-(dimethylamino)pyridine is not chelation assisted, which has not been described before for Csp3 -H bonds in cyclometallation reactions. The mechanism of the cyclometallation of 2-(dimethylamino)pyridine was studied by DFT calculations and kinetic measurements.
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Affiliation(s)
- David A Ahlstrand
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, PO Box 124, 22100, Lund, Sweden
| | - Alexey V Polukeev
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, PO Box 124, 22100, Lund, Sweden
| | - Rocío Marcos
- School of Biotechnology, KTH Royal Institute of Technology, 106 91, Stockholm, Sweden
| | - Mårten S G Ahlquist
- School of Biotechnology, KTH Royal Institute of Technology, 106 91, Stockholm, Sweden
| | - Ola F Wendt
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, PO Box 124, 22100, Lund, Sweden
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27
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Tiwari VK, Kamal N, Kapur M. One Substrate, Two Modes of C–H Functionalization: A Metal-Controlled Site-Selectivity Switch in C–H Arylation Reactions. Org Lett 2016; 19:262-265. [DOI: 10.1021/acs.orglett.6b03558] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Virendra Kumar Tiwari
- Department of Chemistry,
330, Academic Building II, Indian Institute of Science Education and Research Bhopal, Bhopal-Bypass Road, Bhauri, Bhopal 462066, Madhya
Pradesh, India
| | - Neha Kamal
- Department of Chemistry,
330, Academic Building II, Indian Institute of Science Education and Research Bhopal, Bhopal-Bypass Road, Bhauri, Bhopal 462066, Madhya
Pradesh, India
| | - Manmohan Kapur
- Department of Chemistry,
330, Academic Building II, Indian Institute of Science Education and Research Bhopal, Bhopal-Bypass Road, Bhauri, Bhopal 462066, Madhya
Pradesh, India
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28
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Kramer S. Recent Advances in Gold-Catalyzed Intermolecular Aryl C−H Functionalization. Chemistry 2016; 22:15584-15598. [DOI: 10.1002/chem.201602316] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Søren Kramer
- Center for Interdisciplinary Nanoscience (iNANO); Department of Chemistry; Aarhus University; Gustav Wieds vej 14 8000 Aarhus C Denmark
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