1
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Weber F, Weber A, Schmitt L, Lechtenberg I, Greb J, Henßen B, Wesselborg S, Pietruszka J. From the Total Synthesis of Semi-Viriditoxin, Semi-Viriditoxic Acid and Dimeric Naphthopyranones to their Biological Activities in Burkitt B Cell Lymphoma. Chemistry 2024; 30:e202400559. [PMID: 38411573 DOI: 10.1002/chem.202400559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 02/28/2024]
Abstract
Dimeric naphthopyranones are known to be biologically active, however, for the corresponding monomeric naphthopyranones this information is still elusive. Here the first enantioselective total synthesis of semi-viriditoxic acid as well as the synthesis of semi-viriditoxin and derivatives is reported. The key intermediate in the synthesis of naphthopyranones is an α,β-unsaturated δ-lactone, which we synthesized in two different ways (Ghosez-cyclization and Grubbs ring-closing metathesis), while the domino-Michael-Dieckmann reaction of the α,β-unsaturated δ-lactone with an orsellinic acid derivative is the key reaction. A structure-activity relationship study was performed measuring the cytotoxicity in Burkitt B lymphoma cells (Ramos). The dimeric structure was found to be crucial for biological activity: Only the dimeric naphthopyranones showed cytotoxic and apoptotic activity, whereas the monomers did not display any activity at all.
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Affiliation(s)
- Frederike Weber
- Institute for Bioorganic Chemistry, Heinrich Heine University Düsseldorf in, Forschungszentrum Jülich, 52426, Jülich, Germany
| | - Anja Weber
- Institute for Bioorganic Chemistry, Heinrich Heine University Düsseldorf in, Forschungszentrum Jülich, 52426, Jülich, Germany
| | - Laura Schmitt
- Institute for Molecular Medicine I, Heinrich Heine University Düsseldorf, 40225, Düsseldorf, Germany
| | - Ilka Lechtenberg
- Institute for Molecular Medicine I, Heinrich Heine University Düsseldorf, 40225, Düsseldorf, Germany
| | - Julian Greb
- Institute for Bioorganic Chemistry, Heinrich Heine University Düsseldorf in, Forschungszentrum Jülich, 52426, Jülich, Germany
| | - Birgit Henßen
- Institute for Bioorganic Chemistry, Heinrich Heine University Düsseldorf in, Forschungszentrum Jülich, 52426, Jülich, Germany
- Institute of Bio- and Geosciences (IBG-1: Biotechnology), Forschungszentrum Jülich, 52426, Jülich, Germany
| | - Sebastian Wesselborg
- Institute for Molecular Medicine I, Heinrich Heine University Düsseldorf, 40225, Düsseldorf, Germany
| | - Jörg Pietruszka
- Institute for Bioorganic Chemistry, Heinrich Heine University Düsseldorf in, Forschungszentrum Jülich, 52426, Jülich, Germany
- Institute of Bio- and Geosciences (IBG-1: Biotechnology), Forschungszentrum Jülich, 52426, Jülich, Germany
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2
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Hatakenaka R, Nishikawa N, Mikata Y, Aoyama H, Yamashita K, Shiota Y, Yoshizawa K, Kawasaki Y, Tomooka K, Kamijo S, Tani F, Murafuji T. Efficient Synthesis and Structural Analysis of Chiral 4,4'-Biazulene. Chemistry 2024; 30:e202400098. [PMID: 38376431 DOI: 10.1002/chem.202400098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/20/2024] [Accepted: 02/20/2024] [Indexed: 02/21/2024]
Abstract
4,4'-Biazulene is a potentially attractive key component of an axially chiral biaryl compound, however, its structure and properties have not been clarified owing to the lack of its efficient synthesis. We report a breakthrough in the reliable synthesis of 4,4'-biazulene, which is achieved by the access to azulen-4-ylboronic acid pinacol ester and 4-iodoazulene as novel key synthetic intermediates for the Suzuki-Miyaura cross-coupling reaction. The X-ray crystallographic analysis of 4,4'-biazulene confirmed its axial chirality. The enantiomers of 4,4'-biazulene were successfully resolved by HPLC on the chiral stationary phase column. The kinetic experiments and DFT calculations indicate that the racemization energy barrier of 4,4'-biazulene is comparable to that of 1,1'-binaphthyl.
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Affiliation(s)
- Ryoji Hatakenaka
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8512, Japan
| | - Nanami Nishikawa
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8512, Japan
| | - Yuji Mikata
- Laboratory for Molecular & Functional Design, Department of Engineering, Nara Women's University, Nara, 630-8506, Japan
| | - Hiroki Aoyama
- Graduate School of Science, Kyushu University, Fukuoka, 819-0395, Japan
| | - Kohsuke Yamashita
- Graduate School of Engineering, Kyushu University, Fukuoka, 819-0395, Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Yuuya Kawasaki
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
| | - Shin Kamijo
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8512, Japan
| | - Fumito Tani
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Toshihiro Murafuji
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8512, Japan
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3
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Pan ML, Hsu CH, Lin YD, Chen BH, Lu CH, Yang SD, Chou PT, Wu YT. Overcrowded 14,14'-Bidibenzo[a,j]anthracenes: Challenges in Syntheses and Atypical Property of Lacking Symmetry-Breaking Charge Transfer (SBCT). Chemistry 2024:e202401063. [PMID: 38654592 DOI: 10.1002/chem.202401063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Revised: 04/17/2024] [Accepted: 04/23/2024] [Indexed: 04/26/2024]
Abstract
14,14'-Bidibenzo[a,j]anthracenes (BDBAs) were prepared by iridium-catalyzed annulation of 5,5'-biterphenylene with alkynes. Overcrowded BDBAs with highly distorted molecular halves and a small interplanar angle between two anthryl moieties (down to approximately 31º, currently the lowest reported value) were verified by X-ray crystallography. The strong intramolecular interactions and electronic couplingsbetween two molecular halves resulted in upfield 1H NMR signals, redshifted absorption and emission bands, and a reduced HOMO-LUMO gap. Photodynamic investigations on BDBAs indicated that the formation of the conventional symmetry-breaking charge transfer (SBCT) state was suspended by restricted rocking around the central C-C bond. Such a mechanism associated with this highly constrained conformation was examined for the first time.
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Affiliation(s)
- Ming-Lun Pan
- National Cheng Kung University, Department of Chemistry, TAIWAN
| | - Chao-Hsien Hsu
- National Taiwan University, Department of Chemistry, TAIWAN
| | - Yan-Ding Lin
- National Taiwan University, Department of Chemistry, TAIWAN
| | - Bo-Han Chen
- National Tsing Hua University, Institute of Photonics Technologies, TAIWAN
| | - Chih-Hsuan Lu
- National Tsing Hua University, Institute of Photonics Technologies, TAIWAN
| | - Shang-Da Yang
- National Tsing Hua University, Institute of Photonics Technologies, TAIWAN
| | - Pi-Tai Chou
- National Taiwan University, Department of Chemistry, TAIWAN
| | - Yao-Ting Wu
- National Cheng Kung University, Department of Chemistry, No. 1 Ta-Hsueh Rd., 70101, Tainan, TAIWAN
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4
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Takaishi K, Yoshinami F, Sato Y, Ema T. Temperature-Induced Sign Inversion of Circularly Polarized Luminescence of Binaphthyl-Bridged Tetrathiapyrenophanes. Chemistry 2024:e202400866. [PMID: 38567834 DOI: 10.1002/chem.202400866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Indexed: 04/30/2024]
Abstract
D2-symmetric (R)-binaphthyl-bridged pyrenophanes containing thioether bonds were synthesized. The pyrenophanes exhibited the temperature-induced sign inversion of circularly polarized luminescence (CPL) while maintaining the emission wavelength and reversibility. The Δglum value reached 0.02, and the FL quenching by heat was negligible. The sign inversion of CPL originates from the inversion of intramolecular excimer chirality associated with excitation dynamics. The two pyrenes form a kinetically trapped left-handed twist excimer at low temperatures, while they form a thermodynamically favored right-handed twist excimer at high temperatures. The thioether linkers can impart flexibility suitable for the inversion of chirality of the excimers.
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Affiliation(s)
- Kazuto Takaishi
- Division of Applied Chemistry, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Tsushima, Okayama, 700-8530, Japan
| | - Fumiya Yoshinami
- Division of Applied Chemistry, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Tsushima, Okayama, 700-8530, Japan
| | - Yoshihiro Sato
- Division of Applied Chemistry, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Tsushima, Okayama, 700-8530, Japan
| | - Tadashi Ema
- Division of Applied Chemistry, Graduate School of Environmental, Life, Natural Science and Technology, Okayama University, Tsushima, Okayama, 700-8530, Japan
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5
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Pan ML, Hsu CH, Lin YD, Chen WS, Chen BH, Lu CH, Yang SD, Cheng MJ, Chou PT, Wu YT. A New Series of Sandwich-Type 5,5'-Biterphenylenes: Synthetic Challenge, Structural Uniqueness and Photodynamics. Chemistry 2024; 30:e202303523. [PMID: 37997021 DOI: 10.1002/chem.202303523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/21/2023] [Accepted: 11/23/2023] [Indexed: 11/25/2023]
Abstract
A new series of biaryls, bi-linear-terphenylenes (BLTPs), were prepared using the tert-butyllithium-mediated cyclization as the key synthetic step. The three-dimensional structures of the studied compounds were verified using X-ray crystallography and DFT calculations. Tetraaryl(ethynyl)-substituted BLTPs are highly crowded molecules, and the internal rotation around the central C-C bond is restricted due to a high barrier (>50 kcal/mol). These structures contain several aryl/terphenylenyl/aryl sandwiches, where the through-space π-π (TSPP) interactions are strongly reflected in the shielding of 1 H NMR chemical shifts, reduction of oxidation potentials, increasing aromaticity of the central six-membered ring and decreasing antiaromaticity of the four-membered rings in a terphenylenyl moiety based on NICS(0) and iso-chemical shielding surfaces. Despite the restricted C-C bond associated intramolecular TSPP interactions for BLTPs in the ground state, to our surprise, the electronic coupling between two linear terphenylenes (LTPs) in BLTPs in the excited state is weak, so that the excited-state behavior is dominated by the corresponding monomeric LTPs. In other words, all BLTPs undergo ultrafast relaxation dynamics via strong exciton-vibration coupling, acting as a blue-light absorber with essentially no emission.
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Affiliation(s)
- Ming-Lun Pan
- Department of Chemistry, National Cheng Kung University, 70101, Tainan, Taiwan
| | - Chao-Hsien Hsu
- Department of Chemistry, National Taiwan University, 10617, Taipei, Taiwan
| | - Yan-Ding Lin
- Department of Chemistry, National Taiwan University, 10617, Taipei, Taiwan
| | - Wei-Sen Chen
- Department of Chemistry, National Cheng Kung University, 70101, Tainan, Taiwan
| | - Bo-Han Chen
- Institute of Photonics Technologies, National Tsing Hua University, 30013, Hsinchu, Taiwan
| | - Chih-Hsuan Lu
- Institute of Photonics Technologies, National Tsing Hua University, 30013, Hsinchu, Taiwan
| | - Shang-Da Yang
- Institute of Photonics Technologies, National Tsing Hua University, 30013, Hsinchu, Taiwan
| | - Mu-Jeng Cheng
- Department of Chemistry, National Cheng Kung University, 70101, Tainan, Taiwan
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, 10617, Taipei, Taiwan
| | - Yao-Ting Wu
- Department of Chemistry, National Cheng Kung University, 70101, Tainan, Taiwan
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6
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Sanil G, Krzeszewski M, Chaładaj W, Danikiewicz W, Knysh I, Dobrzycki Ł, Staszewska-Krajewska O, Cyrański MK, Jacquemin D, Gryko DT. Gold-Catalyzed 1,2-Aryl Shift and Double Alkyne Benzannulation. Angew Chem Int Ed Engl 2023; 62:e202311123. [PMID: 37823245 DOI: 10.1002/anie.202311123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 10/13/2023]
Abstract
The tandem intramolecular hydroarylation of alkynes accompanied by a 1,2-aryl shift is described. Harnessing the unique electron-rich character of 1,4-dihydropyrrolo[3,2-b]pyrrole scaffold, we demonstrate that the hydroarylation of alkynes proceeds at the already occupied positions 2 and 5 leading to a 1,2-aryl shift. Remarkably, the reaction proceeds only in the presence of cationic gold catalyst, and it leads to heretofore unknown π-expanded, centrosymmetric pyrrolo[3,2-b]pyrroles. The utility is verified in the preparation of 13 products that bear six conjugated rings. The observed compatibility with various functional groups allows for increased tunability with regard to the photophysical properties as well as providing sites for further functionalization. Computational studies of the reaction mechanism revealed that the formation of the six-membered rings accompanied with a 1,2-aryl shift is both kinetically and thermodynamically favourable over plausible formation of products containing 7-membered rings. Steady-state UV/Visible spectroscopy reveals that upon photoexcitation, the prepared S-shaped N-doped nanographenes undergo mostly radiative relaxation leading to large fluorescence quantum yields. Their optical properties are rationalized through time-dependent density functional theory calculations. We anticipate that this chemistry will empower the creation of new materials with various functionalities.
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Affiliation(s)
- Gana Sanil
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Maciej Krzeszewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Wojciech Chaładaj
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Witold Danikiewicz
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Iryna Knysh
- Nantes Université, CNRS, CEISAM UMR 6230, F-44000, Nantes, France
| | - Łukasz Dobrzycki
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | | | - Michał K Cyrański
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warsaw, Poland
| | - Denis Jacquemin
- Nantes Université, CNRS, CEISAM UMR 6230, F-44000, Nantes, France
- Institut Universitaire de France (IUF), F-75005, Paris, France
| | - Daniel T Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
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7
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Bhaskar B, Raghavender M, Ramesh Naidu B, Venkateswarlu K, Kumar KS. Tamarindus indica seed ash extract for C-C coupling under added organics and volatile organic solvent-free conditions: a waste repurposing technique for Suzuki-Miyaura reaction. Environ Sci Pollut Res Int 2023; 30:71430-71438. [PMID: 35503152 DOI: 10.1007/s11356-022-20407-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 04/19/2022] [Indexed: 06/14/2023]
Abstract
A tremendous research has been appeared on Pd-catalyzed Suzuki-Miyaura cross-coupling (SMC) during the last four decades due to its high prominence in constructing biaryl motifs of several complexes as well as simple organic compounds of high biological and commercial significance. The use of organic solid waste-derived materials for SMC in benign solvents like water/aqueous media is a very good achievement in these cases. We report in this article the usability of water extract of Tamarindus indica seeds ash (WETS) as a renewable base and reaction medium for Pd(OAc)2-catalyzed SMC reaction at room temperature (RT). The WETS has been characterized using powder XRD, EDAX, SEM, and FTIR analysis. Furthermore, this process is highly environmentally beneficial by the waste repurposing to prominent chemical transformation along with the advantages such as ambient condition and avoids non-renewable chemicals like volatile organic solvents, ligands, promoters, and bases. Based on these merits and the quick reactions with high yields of products, this method can attain the interest of the scientific community in exploring the waste-derived ashes to significant chemical transformations. Tamarindus indica seed ash extract for C-C coupling under added organics and volatile organic solvent-free conditions: a waste repurposing technique for Suzuki-Miyaura reaction.
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Affiliation(s)
- Boyapally Bhaskar
- Department of Chemistry, Osmania University, Hyderabad, 500 007, India
| | - Matta Raghavender
- Department of Chemistry, Osmania University, Hyderabad, 500 007, India
| | - Bandameeda Ramesh Naidu
- Laboratory for Synthetic & Natural Products Chemistry, Department of Chemistry, Yogi Vemana University, Kadapa, 516005, India
| | - Katta Venkateswarlu
- Laboratory for Synthetic & Natural Products Chemistry, Department of Chemistry, Yogi Vemana University, Kadapa, 516005, India
| | - K Shiva Kumar
- Department of Chemistry, Osmania University, Hyderabad, 500 007, India.
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8
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Azpilcueta-Nicolas CR, Meng D, Edelmann S, Lumb JP. Dearomatization of Biaryls through Polarity Mismatched Radical Spirocyclization. Angew Chem Int Ed Engl 2023; 62:e202215422. [PMID: 36454656 DOI: 10.1002/anie.202215422] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/21/2022] [Accepted: 12/01/2022] [Indexed: 12/03/2022]
Abstract
Dearomatization reactions involving radical cyclizations can facilitate the synthesis of complex polycyclic systems that find applications in medicinal chemistry and natural product synthesis. Here we employ redox-neutral photocatalysis to affect a radical spirocyclization that transforms biaryls into spirocyclic cyclohexadienones under mild reaction conditions. In a departure from previously reported methods, our work demonstrates the polarity mismatched addition of a nucleophilic radical to an electron rich arene, and allows the regioselective synthesis of 2,4- or 2,5-cyclohexadienones with broad functional group tolerance. By transforming biaryls into spirocycles, our methodology accesses underexplored three-dimensional chemical space, and provides an efficient means of creating quaternary spirocenters that we apply to the first synthesis of the cytotoxic plant metabolite denobilone A.
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Affiliation(s)
| | - Derek Meng
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Simon Edelmann
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
| | - Jean-Philip Lumb
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Quebec H3A 0B8, Canada
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9
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Pearce KG, Dinoi C, Hill MS, Mahon MF, Maron L, Schwamm RS, Wilson ASS. Synthesis of Molecular Phenylcalcium Derivatives: Application to the Formation of Biaryls. Angew Chem Int Ed Engl 2022; 61:e202200305. [PMID: 35212128 PMCID: PMC9315018 DOI: 10.1002/anie.202200305] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Indexed: 12/17/2022]
Abstract
Hydrocarbon‐soluble β‐diketiminato phenylcalcium derivatives, which display various modes of Ca−μ2‐Ph−Ca bridging, are accessible from reactions of Ph2Hg and [(BDI)CaH]2. Although the resultant compounds are inert toward the C−H bonds of benzene, they yield selective and uncatalyzed biaryl formation when reacted with readily available aryl bromides.
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Affiliation(s)
- Kyle G Pearce
- Department of Chemistry, University of Bath, Claverton Down, Bath, UK
| | - Chiara Dinoi
- Université de Toulouse et CNRS, INSA, UPS, UMR 5215, LPCNO, 135 Avenue de Rangueil, 31077, Toulouse, France
| | - Michael S Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath, UK
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath, UK
| | - Laurent Maron
- Université de Toulouse et CNRS, INSA, UPS, UMR 5215, LPCNO, 135 Avenue de Rangueil, 31077, Toulouse, France
| | - Ryan S Schwamm
- Department of Chemistry, University of Bath, Claverton Down, Bath, UK
| | - Andrew S S Wilson
- Department of Chemistry, University of Bath, Claverton Down, Bath, UK
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10
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Röthlisberger P, Levi-Acobas F, Leumann CJ, Hollenstein M. Enzymatic synthesis of biphenyl-DNA oligonucleotides. Bioorg Med Chem 2020; 28:115487. [PMID: 32284226 DOI: 10.1016/j.bmc.2020.115487] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/27/2020] [Accepted: 04/01/2020] [Indexed: 12/25/2022]
Abstract
The incorporation of nucleotides equipped with C-glycosidic aromatic nucleobases into DNA and RNA is an alluring strategy for a number of practical applications including fluorescent labelling of oligonucleotides, expansion of the genetic alphabet for the generation of aptamers and semi-synthetic organisms, or the modulation of excess electron transfer within DNA. However, the generation of C-nucleoside containing oligonucleotides relies mainly on solid-phase synthesis which is quite labor intensive and restricted to short sequences. Here, we explore the possibility of constructing biphenyl-modified DNA sequences using enzymatic synthesis. The presence of multiple biphenyl-units or biphenyl residues modified with electron donors and acceptors permits the incorporation of a single dBphMP nucleotide. Moreover, templates with multiple abasic sites enable the incorporation of up to two dBphMP nucleotides, while TdT-mediated tailing reactions produce single-stranded DNA oligonucleotides with four biphenyl residues appended at the 3'-end.
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Affiliation(s)
- Pascal Röthlisberger
- Institut Pasteur, Department of Structural Biology and Chemistry, Laboratory for Bioorganic Chemistry of Nucleic Acids, CNRS UMR 3523, 28, rue du Docteur Roux, 75724 Paris Cedex 15, France; Institut Pasteur, Department of Genome and Genetics, Paris, France
| | - Fabienne Levi-Acobas
- Institut Pasteur, Department of Structural Biology and Chemistry, Laboratory for Bioorganic Chemistry of Nucleic Acids, CNRS UMR 3523, 28, rue du Docteur Roux, 75724 Paris Cedex 15, France; Institut Pasteur, Department of Genome and Genetics, Paris, France
| | - Christian J Leumann
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Marcel Hollenstein
- Institut Pasteur, Department of Structural Biology and Chemistry, Laboratory for Bioorganic Chemistry of Nucleic Acids, CNRS UMR 3523, 28, rue du Docteur Roux, 75724 Paris Cedex 15, France; Institut Pasteur, Department of Genome and Genetics, Paris, France.
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11
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Norrehed S, Karlsson C, Light ME, Thapper A, Huang P, Gogoll A. Formation of persistent organic diradicals from N, N'-diphenyl-3,7-diazacyclooctanes. Monatsh Chem 2018; 150:77-84. [PMID: 30679878 PMCID: PMC6320754 DOI: 10.1007/s00706-018-2298-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 09/18/2018] [Indexed: 11/27/2022]
Abstract
ABSTRACT N,N'-Diphenyl-3,7-diazacyclooctane and structurally related N,N'-diphenylbispidine derivatives react with silver(I) ions in a high-yielding C-C coupling reaction to produce dication-diradical species, with the silver ions serving a double function both as template and as an oxidant. The resulting bis(benzidino)phane derivatives are persistent organic radicals, stable for several months in solution as well as in the solid state, at room temperature and above, as well as being exposed to the atmosphere. The molecular structure features a double-decker cyclophane motif, stabilized by intramolecular π-dimerization of two delocalized benzidinium radical segments. Intermolecular π-dimers are formed in the solid state. GRAPHICAL ABSTRACT
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Affiliation(s)
- Sara Norrehed
- Department of Chemistry - BMC, Uppsala University, Uppsala, Sweden
| | | | - Mark E. Light
- Department of Chemistry, University of Southampton, Highfield, Southampton, UK
| | - Anders Thapper
- Department of Chemistry - Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Ping Huang
- Department of Chemistry - Ångström Laboratory, Uppsala University, Uppsala, Sweden
| | - Adolf Gogoll
- Department of Chemistry - BMC, Uppsala University, Uppsala, Sweden
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12
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Trommer V, Fischer F, Hapke M. Novel naphthylpyridines from cobalt-catalyzed cyclotrimerization of a chiral diyne. Monatsh Chem 2018; 149:755-763. [PMID: 29681656 PMCID: PMC5906485 DOI: 10.1007/s00706-017-2083-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 10/16/2017] [Indexed: 11/24/2022]
Abstract
Abstract The concise synthesis of a novel chiral diyne substrate for the assembly of chiral naphthylpyridines was described and different conditions for the cobalt-catalyzed co-cyclotrimerization with nitriles investigated. The products are novel naphthylpyridines possessing configurationally stable biaryl axes. Graphical abstract ![]()
Electronic supplementary material The online version of this article (doi:10.1007/s00706-017-2083-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Volkmar Trommer
- 1Leibniz-Institut für Katalyse an der Universität Rostock (LIKAT), Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| | - Fabian Fischer
- 1Leibniz-Institut für Katalyse an der Universität Rostock (LIKAT), Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| | - Marko Hapke
- 1Leibniz-Institut für Katalyse an der Universität Rostock (LIKAT), Albert-Einstein-Strasse 29a, 18059 Rostock, Germany.,2Institut für Katalyse (INCA), Johannes Kepler Universität Linz, Altenberger Strasse 69, 4040 Linz, Austria
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13
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Abstract
The beginning of the 21st century has seen tremendous growth in the field of decarboxylative activation. Benzoic acid derivatives are now recognised as atom-economic alternatives to traditional cross-coupling partners, and they also benefit from being inexpensive, readily available and shelf-stable reagents. In this microreview we discuss recent developments in the coupling of benzoic acid derivatives either with an arene or with a second benzoic acid derivative, a process often termed decarboxylative oxidative cross-coupling. These procedures offer great promise for the development of highly selective and atom-economic cross-couplings.
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Affiliation(s)
| | - Igor Larrosa
- School of ChemistryUniversity of ManchesterOxford RoadM13 9PLManchesterU.K.
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14
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Dobrounig P, Trobe M, Breinbauer R. Sequential and iterative Pd-catalyzed cross-coupling reactions in organic synthesis. Monatsh Chem 2016; 148:3-35. [PMID: 28127089 PMCID: PMC5225241 DOI: 10.1007/s00706-016-1883-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 11/21/2016] [Indexed: 12/24/2022]
Abstract
ABSTRACT Sequential and iterative Pd-catalyzed cross-coupling reactions can be performed in which the order of C-C bond formations can be controlled either by the attenuated leaving groups of the multireactive substrate or by specific catalyst/ligand combinations. This tutorial review gives an overview about recent developments in this field and the various strategies used for the assembly of oligoarenes and -alkenes. GRAPHICAL ABSTRACT
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Affiliation(s)
- Patrick Dobrounig
- Institute of Organic Chemistry, Graz University of Technology, Graz, Austria
| | - Melanie Trobe
- Institute of Organic Chemistry, Graz University of Technology, Graz, Austria
| | - Rolf Breinbauer
- Institute of Organic Chemistry, Graz University of Technology, Graz, Austria
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15
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Effenberger I, Harport M, Pfannstiel J, Klaiber I, Schaller A. Expression in Pichia pastoris and characterization of two novel dirigent proteins for atropselective formation of gossypol. Appl Microbiol Biotechnol 2016; 101:2021-2032. [PMID: 27858135 DOI: 10.1007/s00253-016-7997-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/30/2016] [Accepted: 11/05/2016] [Indexed: 12/16/2022]
Abstract
We established an efficient fed-batch fermentation process for two novel dirigent proteins from cotton plants, GbDIR2 from Gossypium barbadense and GhDIR3 from G. hirsutum, using the engineered Pichia pastoris GlycoSwitch® SuperMan5 strain to prevent hyperglycosylation. The two (His)6-tagged proteins were purified by metal-chelate affinity chromatography and obtained in quantities of 12 and 15 mg L-1 of culture volume, respectively. Glycosylation sites were identified for the native and for the enzymatically deglycosylated proteins by mass spectrometry, confirming five to six of the seven predicted glycosylation sites in the NxS/T sequence context. The predominant glycan structure was Man5GlcNAc2 with, however, a significant contribution of Man4-10GlcNAc2. Both dirigent proteins (DIRs) mediated the formation of (+)-gossypol by atropselective coupling of hemigossypol radicals. Similar to previously characterized DIRs, GbDIR2 and GhDIR3 lacked oxidizing activity and depended on an oxidizing system (laccase/O2) for the generation of substrate radicals. In contrast to DIRs involved in the biosynthesis of lignans, glycosylation was not essential for function. Quantitative enzymatic deglycosylation yielded active GbDIR2 and GhDIR3 in excellent purity. The described fermentation process in combination with enzymatic deglycosylation will pave the way for mechanistic and structural studies and, eventually, the application of cotton DIRs in a biomimetic approach towards atropselective biaryl synthesis.
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Affiliation(s)
- Isabelle Effenberger
- Institute of Plant Physiology and Biotechnology, University of Hohenheim, 70593, Stuttgart, Germany
| | - Michael Harport
- Institute of Plant Physiology and Biotechnology, University of Hohenheim, 70593, Stuttgart, Germany
| | - Jens Pfannstiel
- Core Facility Hohenheim, Mass Spectrometry Unit, University of Hohenheim, 70593, Stuttgart, Germany
| | - Iris Klaiber
- Core Facility Hohenheim, Mass Spectrometry Unit, University of Hohenheim, 70593, Stuttgart, Germany
| | - Andreas Schaller
- Institute of Plant Physiology and Biotechnology, University of Hohenheim, 70593, Stuttgart, Germany.
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16
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Enyedy IJ, Powell NA, Caravella J, van Vloten K, Chao J, Banerjee D, Marcotte D, Silvian L, McKenzie A, Hong VS, Fontenot JD. Discovery of biaryls as RORγ inverse agonists by using structure-based design. Bioorg Med Chem Lett 2016; 26:2459-2463. [PMID: 27080181 DOI: 10.1016/j.bmcl.2016.03.109] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 03/25/2016] [Accepted: 03/30/2016] [Indexed: 11/16/2022]
Abstract
RORγ plays a critical role in controlling a pro-inflammatory gene expression program in several lymphocyte lineages including T cells, γδ T cells, and innate lymphoid cells. RORγ-mediated inflammation has been linked to susceptibility to Crohn's disease, arthritis, and psoriasis. Thus inverse agonists of RORγ have the potential of modulating inflammation. Our goal was to optimize two RORγ inverse agonists: T0901317 from literature and 1 that we obtained from internal screening. We used information from internal X-ray structures to design two libraries that led to a new biaryl series.
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Affiliation(s)
| | | | | | | | - Jianhua Chao
- Biogen, 250 Binney St., Cambridge, MA 02142, USA
| | | | | | | | | | - Victor Sukbong Hong
- Keimyung University, 1095 Dalgubeoldaero, Dalseo-Gu, Daegu, Republic of Korea
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17
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Goel A, Nag P, Rahuja N, Srivastava R, Chaurasia S, Gautam S, Chandra S, Siddiqi MI, Srivastava AK. Discovery of biaryl-4-carbonitriles as antihyperglycemic agents that may act through AMPK-p38 MAPK pathway. Mol Cell Endocrinol 2014; 394:1-12. [PMID: 24993155 DOI: 10.1016/j.mce.2014.06.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 05/30/2014] [Accepted: 06/10/2014] [Indexed: 01/07/2023]
Abstract
A series of functionalized biaryl-4-carbonitriles was synthesized in three steps and evaluated for PTP-1B inhibitory activity. Among the synthesized compounds, four biaryls 6a-d showed inhibition (IC50 58-75 μM) against in vitro PTP-1B assay possibly due to interaction with amino acid residues Lys120, Tyr46 through hydrogen bonding and aromatic-aromatic interactions, respectively. Two biaryl-4-carbonitriles 6b and 6c showed improved glucose tolerance, fasting as well as postprandial blood glucose, serum total triglycerides, and increased high-density lipoprotein-cholesterol in SLM, STZ, STZ-S and C57BL/KsJ-db/db animal models. The bioanalysis of 4'-bromo-2,3-dimethyl-5-(piperidin-1-yl)biphenyl-4-carbonitrile (6b) revealed that like insulin, it increased 2-deoxyglucose uptake in skeletal muscle cells (L6 and C2C12 myotubes). The compound 6b significantly up-regulated the genes related to the insulin signaling pathways like AMPK, MAPK including glucose transporter-4 (GLUT-4) gene in muscle tissue of C57BL/KsJ-db/db mice. Furthermore, it was observed that the compound 6b up-regulated PPARα, UCP2 and HNF4α, which are key regulator of glucose, lipid, and fatty acid metabolism. Western blot analysis of the compound 6b showed that it significantly increased the phosphorylation of AMPK and p38 MAPK and ameliorated glucose uptake in C57BL/KsJ-db/db mice through the AMPK-p38 MAPK pathway.
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Affiliation(s)
- Atul Goel
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow 226031, India.
| | - Pankaj Nag
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Neha Rahuja
- Division of Biochemistry, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Rohit Srivastava
- Division of Biochemistry, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Sumit Chaurasia
- Division of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Sudeep Gautam
- Division of Biochemistry, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Sharat Chandra
- Division of Molecular and Structural Biology, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Mohammad Imran Siddiqi
- Division of Molecular and Structural Biology, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Arvind K Srivastava
- Division of Biochemistry, CSIR-Central Drug Research Institute, Lucknow 226031, India
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18
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Woods RM, Patel DC, Lim Y, Breitbach ZS, Gao H, Keene C, Li G, Kürti L, Armstrong DW. Enantiomeric separation of biaryl atropisomers using cyclofructan based chiral stationary phases. J Chromatogr A 2014; 1357:172-81. [PMID: 24835594 DOI: 10.1016/j.chroma.2014.04.080] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 04/22/2014] [Accepted: 04/24/2014] [Indexed: 12/13/2022]
Abstract
Normal phase chiral HPLC methods are presented for the enantiomeric separation of 30 biaryl atropisomers including 18 new compounds recently produced via a novel synthetic approach. Three new cyclofructan based chiral stationary phases were evaluated. Separations were achieved for all but six analytes and the LARIHC™ CF6-P alone provided 15 baseline separations. Effects of polar modifiers and temperature effects also were studied. Apparent thermodynamic parameters were determined by van't Hoff plots. Preparative scale methods were developed and employed resulting in the first ever isolation of these novel atropisomers in their pure enantiomeric form. Insights into the mechanism of retention and chiral discrimination are presented.
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Affiliation(s)
- Ross M Woods
- The University of Texas at Arlington, 700 Planetarium Place, Arlington, TX 76019, USA
| | - Darshan C Patel
- The University of Texas at Arlington, 700 Planetarium Place, Arlington, TX 76019, USA
| | - Yeeun Lim
- The University of Texas at Arlington, 700 Planetarium Place, Arlington, TX 76019, USA
| | - Zachary S Breitbach
- The University of Texas at Arlington, 700 Planetarium Place, Arlington, TX 76019, USA
| | - Hongyin Gao
- Division of Chemistry, Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Craig Keene
- Division of Chemistry, Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Gongqiang Li
- Division of Chemistry, Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - László Kürti
- Division of Chemistry, Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Daniel W Armstrong
- The University of Texas at Arlington, 700 Planetarium Place, Arlington, TX 76019, USA; AZYP LLC, 700 Planetarium Place, Arlington, TX 76019, USA.
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