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Nishijima M, Kobayashi K, Masuda-Endo M, Yoda H, Koike-Takeshita A. Regioselective photocyclodimerization of 2-anthracenecarboxylic acid through ATP hydrolysis-driven conformational change using simulation prediction-designed GroEL mutant. J Biosci Bioeng 2024:S1389-1723(24)00191-9. [PMID: 39097441 DOI: 10.1016/j.jbiosc.2024.07.002] [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: 07/03/2023] [Revised: 06/25/2024] [Accepted: 07/01/2024] [Indexed: 08/05/2024]
Abstract
GroEL, a chaperone protein responsible for peptide and denatured protein folding, undergoes substantial conformational changes driven by ATP binding and hydrolysis during folding. Utilizing these conformational changes, we demonstrated the GroEL-mediated regioselective photocyclodimerization of 2-anthracenecarboxylic acid (AC) using ATP hydrolysis as an external stimulus. We designed and prepared an optimal GroEL mutant to employ in a docking simulation that has been actively used in recent years. Based on the large difference in the motif of hydrogen bonds between AC and GroEL mutant compared with the wild-type, we predicted that GroELMEL, in which the 307‒309th amino acid residues were mutated to Ala, could alter the orientation of bound AC in GroEL. The GroELMEL-mediated photocyclodimerization of AC can be used for regioselective inversion upon ATP addition to a moderate extent.
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Affiliation(s)
- Masaki Nishijima
- National Institute of Technology (KOSEN), Wakayama College, 77 Noshima, Gobo, Wakayama 644-0023, Japan.
| | - Kota Kobayashi
- Department of Applied Chemistry and Bioscience, Graduate School of Engineering, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, Kanagawa 243-0292, Japan
| | - Megumi Masuda-Endo
- Biomedical Research Center, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, Kanagawa 243-0292, Japan
| | - Hiromi Yoda
- Department of Applied Chemistry and Bioscience, Graduate School of Engineering, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, Kanagawa 243-0292, Japan; Biomedical Research Center, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, Kanagawa 243-0292, Japan
| | - Ayumi Koike-Takeshita
- Department of Applied Chemistry and Bioscience, Graduate School of Engineering, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, Kanagawa 243-0292, Japan; Biomedical Research Center, Kanagawa Institute of Technology, 1030 Shimo-ogino, Atsugi, Kanagawa 243-0292, Japan
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2
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Kanai H, Yamada K, Salikolimi K, Kodama K, Ishida Y. Supramolecular Architecture of an Amphiphilic Amino Alcohol as a Versatile Chiral Environment for Stereocontrolled Photoreaction of Various Anthracenes. Chemistry 2022; 28:e202201940. [DOI: 10.1002/chem.202201940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Hayato Kanai
- RIKEN Center for Emergent Matter Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
- Department of Applied Chemistry Graduate School of Science and Engineering Saitama University 255 Shimo-Okubo, Sakura-ku Saitama 338-8570 Japan
| | - Kuniyo Yamada
- RIKEN Center for Emergent Matter Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | | | - Koichi Kodama
- Department of Applied Chemistry Graduate School of Science and Engineering Saitama University 255 Shimo-Okubo, Sakura-ku Saitama 338-8570 Japan
| | - Yasuhiro Ishida
- RIKEN Center for Emergent Matter Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
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3
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Synthesis of cyclodextrin derivatives for enantiodifferentiating photocyclodimerization of 2-anthracenecarboxylate. Nat Protoc 2022; 17:2494-2516. [PMID: 36045225 DOI: 10.1038/s41596-022-00722-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 05/02/2022] [Indexed: 11/08/2022]
Abstract
Photochemical methods are increasingly being used in organic synthesis. They are especially useful for preparing many compounds that are not readily accessible through thermal or enzymatic reactions. The supramolecular strategy has proved highly promising in recent years for manipulating the stereochemical outcome of chiral photoreactions through relatively strong and long-lasting noncovalent interactions in both ground and excited states. Among the numerous chiral photochemical reactions, photocyclodimerization of 2-anthracenecarboxylate (AC) is the most comprehensively studied supramolecular chiral photoreaction and has essentially become a benchmark reaction for evaluating supramolecular photochirogenesis. Cyclodextrin (CD) derivatives were the earliest and are the most widely applied chiral host for mediating photoreactions. Herein, we use CD-mediated photocyclodimerization of AC as an example to introduce the operation process of supramolecular chiral photoreactions. The protocol includes the following contents: (i) the preparation, purification and characterization of β-CD derivatives; (ii) methods for investigating the host-guest inclusion behavior between AC and β-CD derivatives; (iii) the photochemical reaction operation flow under different solvent and temperature conditions; (iv) chiral high-performance liquid chromatography (HPLC) analyses of the product distribution and enantioselectivity. The protocol is introduced by using representative examples of the synthesis of β-CD derivatives and the manipulation of environmental factors that give excellent regio- and enantioselectivities in the photocyclodimerization of AC. The synthesis and purification of β-CD derivatives require 3-5 d of work. The photoirradiation of AC with β-CD derivatives can be done within 1 h. The product analysis requires 5 h.
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4
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Rao M, Fan C, Ji J, Liang W, Wei L, Zhang D, Yan Z, Wu W, Yang C. Catalytic Chiral Photochemistry Sensitized by Chiral Hosts-Grafted Upconverted Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2022; 14:21453-21460. [PMID: 35486103 DOI: 10.1021/acsami.2c02313] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Singlet chiral photocatalysis is highly challenging. Herein, we report fluorescence resonance energy transfer (FRET)-based chiral photocatalysis with γ-cyclodextrin (CD)-grafted lanthanide-doped upconverted nanoparticles (UCNP). The CD-modified UCNP strongly emits in the UV wavelength region upon excitation with a 980 nm laser, which selectively sensitizes the photosubstrates complexed by CD on the surface of UCNP through FRET. Therefore, enantiodifferentiating photocyclodimerization of anthracene or naphthalene derivatives sensitized by the CD-modified UCNP gives photoproducts in good enantioselectivity even in the presence of a catalytic amount of CD-modified UCNP. Moreover, the photocatalysts are readily separated and could be reused for at least six cycles without decreasing the enantioselectivity.
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Affiliation(s)
- Ming Rao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Chunying Fan
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, China
| | - Jiecheng Ji
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Wenting Liang
- Institute of Environmental Science, Department of Chemistry, Shanxi University, Taiyuan 030006, China
| | - Lingling Wei
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Dongjing Zhang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Zhiqiang Yan
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Wanhua Wu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Cheng Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610064, China
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5
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Gole B, Kauffmann B, Tron A, Maurizot V, McClenaghan N, Huc I, Ferrand Y. Selective and Cooperative Photocycloadditions within Multistranded Aromatic Sheets. J Am Chem Soc 2022; 144:6894-6906. [PMID: 35380826 DOI: 10.1021/jacs.2c01269] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A series of aromatic helix-sheet-helix oligoamide foldamers composed of several different photosensitive diazaanthracene units have been designed and synthesized. Molecular objects up to 7 kDa were straightforwardly produced on a 100 mg scale. Nuclear magnetic resonance and crystallographic investigations revealed that helix-sheet-helix architectures can adopt one or two distinct conformations. Sequences composed of an even number of turn units were found to fold in a canonical symmetrical conformation with two helices of identical handedness stacked above and below the sheet segment. Sequences composed of an odd number of turns revealed a coexistence between a canonical fold with helices of opposite handedness and an alternate fold with a twist within the sheet and two helices of identical handedness. The proportions between these species could be manipulated, in some cases quantitatively, being dependent on solvent, temperature, and absolute control of helix handedness. Diazaanthracene units were shown to display distinct reactivity toward [4 + 4] photocycloadditions according to the substituent in position 9. Their organization within the sequences was programmed to allow photoreactions to take place in a specific order. Reaction pathways and kinetics were deciphered and product characterized, demonstrating the possibility to orchestrate successive photoreactions so as to avoid orphan units or to deliberately produce orphan units at precise locations. Strong cooperative effects were observed in which the photoreaction rate was influenced by the presence (or absence) of photoadducts in the structure. Multiple photoreactions within the aromatic sheet eventually lead to structure lengthening and stiffening, locking conformational equilibria. Photoproducts could be thermally reverted.
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Affiliation(s)
- Bappaditya Gole
- Univ. Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), 2 rue Escarpit, 33600 Pessac, France
| | - Brice Kauffmann
- Univ. Bordeaux, CNRS, INSERM, Institut Européen de Chimie Biologie (UMS3033/US001), 2 rue Escarpit, 33600 Pessac, France
| | - Arnaud Tron
- Univ. Bordeaux, CNRS, Institut des Sciences Moléculaires (UMR5255), 351 cours de la Libération, 33405 Talence cedex, France
| | - Victor Maurizot
- Univ. Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), 2 rue Escarpit, 33600 Pessac, France
| | - Nathan McClenaghan
- Univ. Bordeaux, CNRS, Institut des Sciences Moléculaires (UMR5255), 351 cours de la Libération, 33405 Talence cedex, France
| | - Ivan Huc
- Department of Pharmacy, Ludwig-Maximilians-University, Butenandtstr. 5-13, 81377 Munich, Germany.,Cluster of Excellence e-Conversion, 85748 Garching, Germany
| | - Yann Ferrand
- Univ. Bordeaux, CNRS, Bordeaux Institut National Polytechnique, CBMN (UMR 5248), 2 rue Escarpit, 33600 Pessac, France
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6
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Bai S, Wang LF, Wu ZW, Feng T, Han YF. Supramolecular-controlled regioselective photochemical [4+4] cycloaddition within Cp*Rh-based metallarectangles. Dalton Trans 2022; 51:8743-8748. [DOI: 10.1039/d2dt01094a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photochemical reactions are vital synthetic means for the synthesis of natural products as well as highly strained molecules. However, it remains an inherent challenge to control the chemo- and regioselectivity...
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7
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Wang X, Ji J, Rao M, Wu W, Yang C. Supramolecular Enantiodifferentiating Photocyclodimerization of 2-Anthracenecarboxylic Acid Mediated by Bridged β-Cyclodextrins: Critical Effects of the Host Structure, pH and Co-Solvents. Chem Asian J 2021; 16:3091-3096. [PMID: 34510777 DOI: 10.1002/asia.202100827] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/12/2021] [Indexed: 02/05/2023]
Abstract
Several sulfoxide- and sulfone-bridged β-cyclodextrin (CD) dimers were synthesized for mediating the enantiodifferentiating [4+4] photocyclodimerization of 2-anthracenecarboxylic acid (AC). The complexation behavior of these chiral hosts with AC was investigated by UV-vis, circular dichroism, fluorescence, and NMR spectroscopies and certified the formation of 1 : 1 and 1 : 2 host-guest complexes. The product distribution and enantioselectivity of the photoreaction turned out to be a critical function of the chemical structure of bridged CDs. Comparing to the sulfur-bridged 2AX -3GX β-CD dimer 7, the conversion of the photolyzes with sulfoxide-bridged was significantly improved, and the ee of cyclodimer 2 was remarkably increased from -82.8% with 7 to -96.7% with the sulfoxide-bridged 2AX -3GX β-CD dimer 8. The relative yields and ee values of the slipped cyclodimers 5 and 6 were greatly enhanced in the presence of 6 M CsCl. The reaction selectivity is susceptible to the pH variation of the aqueous buffer solution, demonstrating that the supramolecular photochirogenesis is controlled by multidimensional factors, including the chemical structure of the chiral host, solvent, and pH conditions.
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Affiliation(s)
- Xiaoqian Wang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, Healthy Food Evaluation Research Center, Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Jiecheng Ji
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, Healthy Food Evaluation Research Center, Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Ming Rao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, Healthy Food Evaluation Research Center, Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Wanhua Wu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, Healthy Food Evaluation Research Center, Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
| | - Cheng Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, Healthy Food Evaluation Research Center, Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P. R. China
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8
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Niermeier P, Maibom KAM, Lamm JH, Neumann B, Stammler HG, Mitzel NW. Hydrogen-bond-induced selectivity of a head-to-head photo-dimerisation of dialkynylanthracene - access to tetradentate Lewis acids. Chem Sci 2021; 12:7943-7952. [PMID: 34257857 PMCID: PMC8230024 DOI: 10.1039/d1sc02065j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 05/06/2021] [Indexed: 11/21/2022] Open
Abstract
Using 2-hydroxypropyl-protecting groups, 1,8-dialkynylanthracene photo-dimers were prepared in head-to-head-configuration by UV irradiation on a multi-gram scale. In non-polar solvents, the combination of non-covalent hydrogen bonds and π-π-interactions induces the formation of the syn-isomer in up to 85% yield. Instead, more polar solvents or irradiation of unprotected 1,8-diethynylanthracene led to formation of the corresponding anti-isomer in large excess. Cleavage of the protecting groups under basic conditions affords a rigid hydrocarbon skeleton with four directional functions. This was used as a building block for a tetradentate boron Lewis acid. Its applicability as a host for Lewis-base substrates was demonstrated by the formation of adducts with various nitrogen bases. Adduct formation with hydrazine leads to impressive networks between the tetraboron host and the substrate molecules.
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Affiliation(s)
- Philipp Niermeier
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2) Universitätsstr. 25 D-33615 Bielefeld Germany https://www.uni-bielefeld.de/fakultaeten/chemie/ag/ac3-mitzel/
| | - Kristina A M Maibom
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2) Universitätsstr. 25 D-33615 Bielefeld Germany https://www.uni-bielefeld.de/fakultaeten/chemie/ag/ac3-mitzel/
| | - Jan-Hendrik Lamm
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2) Universitätsstr. 25 D-33615 Bielefeld Germany https://www.uni-bielefeld.de/fakultaeten/chemie/ag/ac3-mitzel/
| | - Beate Neumann
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2) Universitätsstr. 25 D-33615 Bielefeld Germany https://www.uni-bielefeld.de/fakultaeten/chemie/ag/ac3-mitzel/
| | - Hans-Georg Stammler
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2) Universitätsstr. 25 D-33615 Bielefeld Germany https://www.uni-bielefeld.de/fakultaeten/chemie/ag/ac3-mitzel/
| | - Norbert W Mitzel
- Universität Bielefeld, Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie (ACS), Centre for Molecular Materials (CM2) Universitätsstr. 25 D-33615 Bielefeld Germany https://www.uni-bielefeld.de/fakultaeten/chemie/ag/ac3-mitzel/
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9
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Rao M, Wu W, Yang C. Recent progress on the enantioselective excited-state photoreactions by pre-arrangement of photosubstrate(s). GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.03.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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10
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Kalayci K, Frisch H, Truong VX, Barner-Kowollik C. Green light triggered [2+2] cycloaddition of halochromic styrylquinoxaline-controlling photoreactivity by pH. Nat Commun 2020; 11:4193. [PMID: 32826921 PMCID: PMC7443129 DOI: 10.1038/s41467-020-18057-9] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 07/29/2020] [Indexed: 12/20/2022] Open
Abstract
Photochemical reactions are a powerful tool in (bio)materials design due to the spatial and temporal control light can provide. To extend their applications in biological setting, the use of low-energy, long wavelength light with high penetration propertiesis required. Further regulation of the photochemical process by additional stimuli, such as pH, will open the door for construction of highly regulated systems in nanotechnology- and biology-driven applications. Here we report the green light induced [2+2] cycloaddition of a halochromic system based on a styrylquinoxaline moiety, which allows for its photo-reactivity to be switched on and off by adjusting the pH of the system. Critically, the [2+2] photocycloaddition can be activated by green light (λ up to 550 nm), which is the longest wavelength employed to date in catalyst-free photocycloadditions in solution. Importantly, the pH-dependence of the photo-reactivity was mapped by constant photon action plots. The action plots further indicate that the choice of solvent strongly impacts the system's photo-reactivity. Indeed, higher conversion and longer activation wavelengths were observed in water compared to acetonitrile under identical reaction conditions. The wider applicability of the system was demonstrated in the crosslinking of an 8-arm PEG to form hydrogels (ca. 1 cm in thickness) with a range of mechanical properties and pH responsiveness, highlighting the potential of the system in materials science.
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Affiliation(s)
- Kubra Kalayci
- Centre for Materials Science, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia
- School of Chemistry and Physics, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia
| | - Hendrik Frisch
- Centre for Materials Science, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia.
- School of Chemistry and Physics, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia.
| | - Vinh X Truong
- Centre for Materials Science, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia.
- School of Chemistry and Physics, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia.
| | - Christopher Barner-Kowollik
- Centre for Materials Science, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia.
- School of Chemistry and Physics, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia.
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11
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Ji J, Wu W, Wei X, Rao M, Zhou D, Cheng G, Gong Q, Luo K, Yang C. Synergetic effects in the enantiodifferentiating photocyclodimerization of 2-anthracenecarboxylic acid mediated by β-cyclodextrin-pillar[5]arene-hybridized hosts. Chem Commun (Camb) 2020; 56:6197-6200. [PMID: 32396589 DOI: 10.1039/d0cc02055a] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Tri-cavity hosts consisting of one pillar[5]arene (P5) sandwiched by two β-cyclodextrins (CDs) were synthesized, and their diastereoseparation was successfully accomplished. Photocyclodimerization of 2-anthracenecarboxylate with these hybrid hosts demonstrated the critical dependence of stereoselectivity on the absolute configuration of the central P5 and the conjugating positions on the β-CD, and gave the non-classical HT photodimers in up to 87% ee.
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Affiliation(s)
- Jiecheng Ji
- Department of Radiology, Huaxi MR Research Center (HMRRC), West China Hospital, Healthy Food Evaluation Research Center and College of Chemistry, Sichuan University, Chengdu 610041, China.
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12
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Enantioselective photoinduced cyclodimerization of a prochiral anthracene derivative adsorbed on helical metal nanostructures. Nat Chem 2020; 12:551-559. [DOI: 10.1038/s41557-020-0453-0] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 03/03/2020] [Indexed: 11/08/2022]
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13
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Takagi R, Tabuchi C. Enantioselective intramolecular [2 + 2] photocycloaddition using phosphoric acid as a chiral template. Org Biomol Chem 2020; 18:9261-9267. [PMID: 33150919 DOI: 10.1039/d0ob02054k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enantioselective intramolecular [2 + 2] photocycloaddition of 4-bishomoally-2-quinolone (quinolinone) using phosphoric acid as a chiral template has been developed. Mechanistic studies using several NMR measurement techniques and density functional theory (DFT) calculations indicate that π-π interactions between the phenyl ring on phosphoric acid and quinolinone play important roles in the enantioselectivity.
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Affiliation(s)
- Ryukichi Takagi
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan.
| | - Chihiro Tabuchi
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan.
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14
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Yospanya W, Nishijima M, Araki Y, Buffeteau T, Pouget E, Wada T, Oda R. Near perfect head-to-head selectivity on the supramolecular photocyclodimerisation of 2-anthracenecarboxylate with self-organised gemini surfactant bilayers. Chem Commun (Camb) 2020; 56:10058-10061. [DOI: 10.1039/d0cc04198j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Near perfect head-to-head selectivity upon supramolecular [4+4] photocyclodimerisation of 2-anthracenecarboxylate were achieved through silicificated self-organised gemini surfactant bilayers in water at room temperature.
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Affiliation(s)
- Wijak Yospanya
- Institute of Chemistry & Biology of Membranes & Nanoobjects (UMR5248 CBMN)
- CNRS – Université de Bordeaux – Bordeaux INP
- 33607 Pessac
- France
- Institute of Multidisciplinary Research for Advanced Materials
| | - Masaki Nishijima
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Sendai 980-8577
- Japan
| | - Yasuyuki Araki
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Sendai 980-8577
- Japan
| | - Thierry Buffeteau
- Institut des Sciences Moléculaires (UMR5255 ISM)
- CNRS – Université de Bordeaux
- 33405 Talence
- France
| | - Emilie Pouget
- Institute of Chemistry & Biology of Membranes & Nanoobjects (UMR5248 CBMN)
- CNRS – Université de Bordeaux – Bordeaux INP
- 33607 Pessac
- France
| | - Takehiko Wada
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Sendai 980-8577
- Japan
| | - Reiko Oda
- Institute of Chemistry & Biology of Membranes & Nanoobjects (UMR5248 CBMN)
- CNRS – Université de Bordeaux – Bordeaux INP
- 33607 Pessac
- France
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15
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Ji J, Wu W, Liang W, Cheng G, Matsushita R, Yan Z, Wei X, Rao M, Yuan DQ, Fukuhara G, Mori T, Inoue Y, Yang C. An Ultimate Stereocontrol in Supramolecular Photochirogenesis: Photocyclodimerization of 2-Anthracenecarboxylate Mediated by Sulfur-Linked β-Cyclodextrin Dimers. J Am Chem Soc 2019; 141:9225-9238. [PMID: 31117644 DOI: 10.1021/jacs.9b01993] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Stereoisomeric β-cyclodextrin (CD) dimers linked with a sulfur atom or an arene spacer were designed to create a tethered dual CD capsule for precisely manipulating the regio- and enantioselectivities of the photocyclodimerization of 2-anthracenecarboxylate (AC) to four stereoisomeric classical 9,10:9',10'-cyclodimers and two nonclassical 5,8:9',10'-cyclodimers. Among the dimeric CD hosts prepared, exo-3-thia-β-CD dimer formed 1:1 and 1:2 host-guest complexes with AC in aqueous solutions, the former of which hindered but the latter facilitated the AC photocyclodimerization with regio- and enantioselectivities much higher than those obtained with native β-CD or the rest of the β-CD dimers. The stereochemical outcomes turned out to be highly sensitive to and hence critically manipulable by the linking position and configuration of the connected saccharide units and the linker length, as well as the external variants, such as temperature, pH, and added salt. Eventually, the photocyclodimerization of AC mediated by the dimeric β-CD host gave enantiopure syn-head-to-tail-9,10:9',10'-cyclodimer in 97-98% yield in a pH 5.1 buffer solution at 0.5 °C and also in an aqueous CsCl solution at -20 °C.
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Affiliation(s)
- Jiecheng Ji
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Wanhua Wu
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Wenting Liang
- Institute of Environmental Science, Department of Chemistry , Shanxi University , Taiyuan 030006 , China
| | - Guo Cheng
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Ryohei Matsushita
- Department of Applied Chemistry , Osaka University , Yamada-oka 2-1 , Suita 565-0871 , Japan
| | - Zhiqiang Yan
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Xueqin Wei
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - Ming Rao
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
| | - De-Qi Yuan
- Faculty of Pharmaceutical Sciences , Kobe Gakuin University , Minatojima 1-1-3 , Chuo-ku , Kobe 650-8586 , Japan
| | - Gaku Fukuhara
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 Ookayama , Meguro-ku 152-8551 , Japan
| | - Tadashi Mori
- Department of Applied Chemistry , Osaka University , Yamada-oka 2-1 , Suita 565-0871 , Japan
| | - Yoshihisa Inoue
- Department of Applied Chemistry , Osaka University , Yamada-oka 2-1 , Suita 565-0871 , Japan
| | - Cheng Yang
- Key Laboratory of Green Chemistry & Technology, College of Chemistry, State Key Laboratory of Biotherapy, West China Medical Center, and Healthy Food Evaluation Research Center , Sichuan University , 29 Wangjiang Road , Chengdu 610064 , China
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16
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Gole B, Kauffmann B, Maurizot V, Huc I, Ferrand Y. Light‐Controlled Conformational Switch of an Aromatic Oligoamide Foldamer. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902378] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Bappaditya Gole
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
| | - Brice Kauffmann
- Université de Bordeaux CNRS INSERM, UMS3033 Institut Européen de Chimie et Biologie (IECB) 2 rue Robert Escarpit 33600 Pessac France
| | - Victor Maurizot
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
| | - Ivan Huc
- Department of Pharmacy and Center for Integrated Protein Science Ludwig-Maximilians-Universität Butenandtstr. 5–13 81377 München Germany
| | - Yann Ferrand
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
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17
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Gole B, Kauffmann B, Maurizot V, Huc I, Ferrand Y. Light‐Controlled Conformational Switch of an Aromatic Oligoamide Foldamer. Angew Chem Int Ed Engl 2019; 58:8063-8067. [DOI: 10.1002/anie.201902378] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Bappaditya Gole
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
| | - Brice Kauffmann
- Université de Bordeaux CNRS INSERM, UMS3033 Institut Européen de Chimie et Biologie (IECB) 2 rue Robert Escarpit 33600 Pessac France
| | - Victor Maurizot
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
| | - Ivan Huc
- Department of Pharmacy and Center for Integrated Protein Science Ludwig-Maximilians-Universität Butenandtstr. 5–13 81377 München Germany
| | - Yann Ferrand
- CBMN (UMR5248) Univ. Bordeaux – CNRS – IPB Institut Européen de Chimie et Biologie 2 rue Escarpit 33600 Pessac France
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18
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Nonomura K, Yuasa J. Competing Allosteric Mechanisms for Coordination-Directed Conformational Changes of Chiral Stacking Structures with Aromatic Rings. Inorg Chem 2019; 58:6474-6484. [PMID: 31008595 DOI: 10.1021/acs.inorgchem.9b00665] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
This work revealed that significant asymmetric nonlinear effects can be found in a coordination-directed conformational alteration through competing allosteric mechanisms. Toward this aim, we have prepared new chiral bridging ligands [( S, S)- and ( R, R)-Im2An] containing an anthracene ring as a spacer with two ethynyl-linked chiral imidazole groups at the 9,10-positions. The ( S, S)- and ( R, R)-Im2An ligands (L) spontaneously form the assemblies with Zn2+ ions (M) in solution phase, giving L4M2-type assemblies with a general formula [( S, S)- or ( R, R)-Im2An]4(Zn2+)2. NMR studies revealed that the [( S, S)-Im2An]4(Zn2+)2 assembly has an anthracene dimer structure with a parallel-displaced geometry, leading to relatively small circular dichroism (CD) signals, as expected for nonchiral objects. Conversely, subsequent addition of chiral coligands [( R)- or ( S)-Ph-box] to [( S, S)-Im2An]4(Zn2+)2 afforded an alternative Zn2+ assembly with general formula [( R)- or ( S)-Ph-box]2[( S, S)-Im2An]2(Zn2+)2, where the chiral coligands expel two of the ( S, S)-Im2An ligands that were singly bound to the Zn2+ ions in the original [( S, S)-Im2An]4(Zn2+)2 assembly. This ligand-exchange reaction causes conformational alteration from a parallel-displaced structure to a twisted stacking between the anthracene rings inside the Zn2+ assembly, which results in a significant enhancement of CD signals due to excitonic interactions of the chiral anthracene dimer. Dissymmetry factor ( gCD) for CD due to chiral stacking structures shows a significant inverse sigmoidal response to the enantiomeric excess of the chiral coligands. The observed nonlinear phenomena are results of the two conflicting mechanisms, homochiral cooperative association (homochiral self-sorting) to form CD-active assemblies [( S)- or ( R)-Ph-box]2[( S, S)-Im2An]2(Zn2+)2 versus heterochiral cooperative dissociation of [( S, S)-Im2An]4(Zn2+)2 by sequestering of Zn2+ inside the assembly through formation of a heterochiral 2:1 Zn2+ complex ([( R)-Ph-box][( S)-Ph-box]Zn2+). The presented mechanisms provide a new strategy for generating switch-like OFF/ON states in chiral systems.
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Affiliation(s)
- Kohei Nonomura
- Department of Applied Chemistry , Tokyo University of Science , 1-3 Kagurazaka , Shinjuku-ku , Tokyo 162-8061 , Japan
| | - Junpei Yuasa
- Department of Applied Chemistry , Tokyo University of Science , 1-3 Kagurazaka , Shinjuku-ku , Tokyo 162-8061 , Japan
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19
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Effects of Temperature and Host Concentration on the Supramolecular Enantiodifferentiating [4 + 4] Photodimerization of 2-Anthracenecarboxylate through Triplet-Triplet Annihilation Catalyzed by Pt-Modified Cyclodextrins. Molecules 2019; 24:molecules24081502. [PMID: 30999573 PMCID: PMC6514921 DOI: 10.3390/molecules24081502] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 04/10/2019] [Accepted: 04/16/2019] [Indexed: 11/17/2022] Open
Abstract
Visible-light-driven photocatalytic supramolecular enantiodifferentiating dimerization of 2-anthracenecarboxylic acid (AC) through triplet-triplet annihilation (TTA), mediated by the Schiff base Pt(II) complex (Pt-1, Pt-2, and Pt-3) was studied. The host concentration and the temperature effects on the stereoselectivity were comprehensively investigated. Increasing the concentration of sensitizers/hosts significantly enhanced the conversion of the photoreaction but led to reduced enantioselectivities of the chiral photodimers 2 and 3 when the photoreaction was triggered by a 532 nm laser, which was in contrast with the results obtained by direct irradiation of AC with a 365 nm light-emitting diode (LED) lamp, due to the aggregation of the sensitizer/host in water. The cyclization of AC through triplet-triplet annihilation displayed significant temperature dependency when Pt-3 was employed as the sensitizer/host. Increasing the temperature from 0 °C to 30 °C with 5% equiv. of Pt-3 led to a great increase of the ee of 2 from 2.1% to 31.6%. However, hardly any temperature dependency was observed when the photodimerization was mediated by other sensitizers and/or hosts, or the photoreaction was triggered directly with a 365 nm LED lamp.
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20
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Wei X, Yu X, Zhang Y, Liang W, Ji J, Yao J, Rao M, Wu W, Yang C. Enhanced irregular photodimers and switched enantioselectivity by solvent and temperature in the photocyclodimerization of 2-anthracenecarboxylate with modified β-cyclodextrins. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.11.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Rao M, Kanagaraj K, Fan C, Ji J, Xiao C, Wei X, Wu W, Yang C. Photocatalytic Supramolecular Enantiodifferentiating Dimerization of 2-Anthracenecarboxylic Acid through Triplet–Triplet Annihilation. Org Lett 2018; 20:1680-1683. [DOI: 10.1021/acs.orglett.8b00520] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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22
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Cheng N, Chen Y, Yu J, Li JJ, Liu Y. Photocontrolled Coumarin-diphenylalanine/Cyclodextrin Cross-Linking of 1D Nanofibers to 2D Thin Films. ACS APPLIED MATERIALS & INTERFACES 2018; 10:6810-6814. [PMID: 29446623 DOI: 10.1021/acsami.7b18755] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Using coumarin-modified diphenylalanine (CO-FF) and γ-cyclodextrin (γ-CD) as building blocks, we successfully constructed one-dimensional nanofibers with several nanometers in width and tens of micrometers in length. Through the photodimerization of coumarin units in CO-FF⊂γ-CD complexes, the resultant nanofibers could be cross-linked to organic 2D thin films with a lateral dimension of tens of micrometers and a thickness of nanometers. The resultant thin films exhibited a significant fluorescence enhancement for twisted intramolecular charge-transfer (TICT) molecules and effective removal of pollutant from water through filtration. This 1D → 2D morphological conversion controlled by light may provide a novel strategy to construct the highly ordered nanostructures that can be used as templates for making nanoscaled materials with defined sizes and shapes.
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Affiliation(s)
- Ni Cheng
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Nankai 300071, China
| | - Yong Chen
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Nankai 300071, China
| | - Jie Yu
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Nankai 300071, China
| | - Jing-Jing Li
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Nankai 300071, China
| | - Yu Liu
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University , Nankai 300071, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071, P. R. China
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23
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Wei X, Wu W, Matsushita R, Yan Z, Zhou D, Chruma JJ, Nishijima M, Fukuhara G, Mori T, Inoue Y, Yang C. Supramolecular Photochirogenesis Driven by Higher-Order Complexation: Enantiodifferentiating Photocyclodimerization of 2-Anthracenecarboxylate to Slipped Cyclodimers via a 2:2 Complex with β-Cyclodextrin. J Am Chem Soc 2018; 140:3959-3974. [PMID: 29437396 DOI: 10.1021/jacs.7b12085] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Chiral slipped 5,8:9',10'-cyclodimers were preferentially produced over classical 9,10:9',10'-cyclodimers upon supramolecular photocyclodimerization of 2-anthracenecarboxylate (AC) mediated by β-cyclodextrin (β-CD). This photochirogenic route to the slipped cyclodimers, exclusively head-to-tail (HT) and highly enantioselective, has long been overlooked in foregoing studies but is dominant in reality and is absolutely supramolecularly activated by 2:2 complexation of AC with β-CD. The intricate structural and photophysical aspects of this higher-order complexation-triggered process have been comprehensively elucidated, while the absolute configurations of the slipped cyclodimers have been unambiguously assigned by comparing the experimental and theoretical circular dichroism spectra. In the 2:2 complex, two ACs packed in a dual β-CD capsule are not fully overlapped with each other but are only partially stacked in a slipped anti- or syn-HT manner. Hence, they do not spontaneously cyclodimerize upon photoexcitation but instead emit long-lived excimer fluorescence at wavelengths slightly longer than the monomer fluorescence, indicating that the slipped excimer is neither extremely reactive nor completely relaxed in conformation and energy. Because of the slipped conformation of the AC pair in the soft capsule, the subsequent photocyclodimerization becomes manipulable by various internal or external factors, such as temperature, pressure, added salt, and host modification, enabling us to exclusively obtain the slipped cyclodimers with high regio- and enantioselectivities. In this supramolecularly driven photochirogenesis, the dual β-CD capsule functions as a chiral organophotocatalyst to trigger and accelerate the nonclassical photochirogenic route to slipped cyclodimers by preorganizing the conformation of the encapsulated AC pair, formally mimicking a catalytic antibody.
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Affiliation(s)
| | | | | | | | - Dayang Zhou
- Comprehensive Analysis Center, ISIR , Osaka University , Mihogaoka , Ibaraki 567-0047 , Japan
| | | | | | - Gaku Fukuhara
- Department of Chemistry , Tokyo Institute of Technology , 2-12-1 Ookayama , Meguro-ku , Tokyo 152-8551 , Japan
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24
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Switched enantioselectivity by solvent components and temperature in photocyclodimerization of 2-anthracenecarboxylate with 6 A ,6 X -diguanidio− γ -cyclodextrins. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.05.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Tanabe J, Taura D, Ousaka N, Yashima E. Chiral Template-Directed Regio-, Diastereo-, and Enantioselective Photodimerization of an Anthracene Derivative Assisted by Complementary Amidinium-Carboxylate Salt Bridge Formation. J Am Chem Soc 2017; 139:7388-7398. [PMID: 28485968 DOI: 10.1021/jacs.7b03317] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A series of optically active amidine dimers composed of m-terphenyl backbones joined by a variety of linkers, such as achiral and chiral p-phenylene and chiral amide linkers, were synthesized and used as templates for the regio- (head-to-tail (HT) or head-to-head (HH)), diastereo- (anti or syn), and enantioselective [4 + 4] photocyclodimerization of an achiral m-terphenyl-based carboxylic acid monomer bearing a prochiral 2-substituted anthracene at one end (1) through complementary amidinium-carboxylate salt bridges. The amidine dimers linked by p-phenylene linkages almost exclusively afforded the chiral syn-HT and anti-HH dimers at 25 °C, while those joined by amide linkers produced all four dimers. The p-phenylene-linked templates tended to enhance the syn-HT-photodimer formation at high temperatures with no significant changes in the product enantiomeric excess (ee), while the anti-HH-photodimer formation remarkably increased with the decreasing temperature accompanied by a significant enhancement of the product ee up to -86% at -50 °C. Temperature-dependent inversion of the chirality of the anti-HH dimer was observed when the chiral phenylene-linked amidine dimer was used and the product ee was changed from 22% at 50 °C to -86% at -50 °C. A similar enhancement of the enantioselectivity of the anti-HH dimer was also observed for the chiral amide-linked template, producing the anti-HH dimer with up to -88% ee at -50 °C. The observed difference in the regio-, diastereo-, and enantioselectivities due to the difference in the linker structures of the amidine dimers during the template-directed photodimerization of 1 was discussed on the basis of a reversible conformational change in the amidine dimers complexed with 1.
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Affiliation(s)
- Junki Tanabe
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Daisuke Taura
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Naoki Ousaka
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University , Chikusa-ku, Nagoya 464-8603, Japan
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26
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Yan Z, Huang Q, Liang W, Yu X, Zhou D, Wu W, Chruma JJ, Yang C. Enantiodifferentiation in the Photoisomerization of (Z,Z)-1,3-Cyclooctadiene in the Cavity of γ-Cyclodextrin–Curcubit[6]uril-Wheeled [4]Rotaxanes with an Encapsulated Photosensitizer. Org Lett 2017; 19:898-901. [DOI: 10.1021/acs.orglett.7b00057] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | - Wenting Liang
- Institute
of Environmental Sciences, Department of Chemistry, Shanxi University, Taiyuan 030006, China
| | | | - Dayang Zhou
- Comprehensive
Analysis Center, ISIR, Osaka University, 8-1 Mihogaoka,
Ibaraki Osaka 5670047, Japan
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