1
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Ao Z, Feng S, Zhao C, Guo S, Li K, Han D, Gong J. Study on polycyclic macromolecular drug solid stability: A case exploration of methylcobalamin. Int J Pharm 2023; 644:123326. [PMID: 37591473 DOI: 10.1016/j.ijpharm.2023.123326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 07/26/2023] [Accepted: 08/15/2023] [Indexed: 08/19/2023]
Abstract
As one of derivatives of Vitamin B12, methylcobalamin (MeCbl) is an indispensable "Life Element" and plays an essential role in maintaining human normal physiology function and clinical medicine application. Because of the intricate molecular structure, strong hygroscopicity and optical instability, maintaining its solid stability is a great challenge in pharmaceutical preparation. Based on the structure features of MeCbl hydrates, this study explored the drug solid stability by designing solid-solid phase transformation (SSPT) experiments. Three hydrate powders of MeCbl that had special structure with isolated site and channel water molecules were discovered. It was found that drying condition and surrounding humidity were controlling factors influencing the final solid form. The inter-conversion relations relevant to heating-induced and humidity-induced structure changes were established among the three hydrate powders. Powder X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry, high performance liquid chromatography and dynamic vapor sorption were used to characterize the differences and related properties of stably prepared MeCbl hydrate powders. The particle size of product could be regulated and controlled by optimizing operating conditions of crystallization process, where ultrasound-assisted and seeding-introduced were applied as promising strategies to enhance solution crystallization process. This study opens up the possibility for the stable preparation and large-scale production of polycyclic macromolecular bulk drugs like methylcobalamin.
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Affiliation(s)
- Zhaoxia Ao
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin 300072, PR China
| | - Shanshan Feng
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin 300072, PR China
| | - Chenyang Zhao
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin 300072, PR China
| | - Shilin Guo
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin 300072, PR China
| | - Kangli Li
- Zhejiang Shaoxing Institute of Tianjin University, Shaoxing 312300, PR China.
| | - Dandan Han
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin 300072, PR China; Zhejiang Shaoxing Institute of Tianjin University, Shaoxing 312300, PR China.
| | - Junbo Gong
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin 300072, PR China; Zhejiang Shaoxing Institute of Tianjin University, Shaoxing 312300, PR China
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2
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Wdowik T, Gryko D. C–C Bond Forming Reactions Enabled by Vitamin B 12─Opportunities and Challenges. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01596] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Tomasz Wdowik
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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3
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Potrząsaj A, Musiejuk M, Chaładaj W, Giedyk M, Gryko D. Cobalt Catalyst Determines Regioselectivity in Ring Opening of Epoxides with Aryl Halides. J Am Chem Soc 2021; 143:9368-9376. [PMID: 34081860 PMCID: PMC8297733 DOI: 10.1021/jacs.1c00659] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Ring-opening of epoxides
furnishing either linear or branched products
belongs to the group of classic transformations in organic synthesis.
However, the regioselective cross-electrophile coupling of aryl epoxides
with aryl halides still represents a key challenge. Herein, we report
that the vitamin B12/Ni dual-catalytic system allows for
the selective synthesis of linear products under blue-light irradiation,
thus complementing methodologies that give access to branched alcohols.
Experimental and theoretical studies corroborate the proposed mechanism
involving alkylcobalamin as an intermediate in this reaction.
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Affiliation(s)
- Aleksandra Potrząsaj
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Mateusz Musiejuk
- 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
| | - Maciej Giedyk
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Dorota Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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4
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Shimakoshi H, Hisaeda Y. Bioinspired Electrolysis for Green Molecular Transformations of Organic Halides Catalyzed by B 12 Complex. CHEM REC 2021; 21:2080-2094. [PMID: 34075694 DOI: 10.1002/tcr.202100077] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/10/2021] [Accepted: 05/11/2021] [Indexed: 12/27/2022]
Abstract
Naturally-occurring B12 -dependent enzymes catalyze various molecular transformations that are of particular interest from the viewpoint of biological chemistry as well as synthetic organic chemistry. Inspired by the unique property of the B12 -dependent enzymes, various catalytic reactions have been developed using its model complex. Among the B12 model complexes, heptamethyl cobyrinate, synthesized from natural vitamin B12 , is highly soluble in various organic solvents and a redox active cobalt complex with an excellent catalysis in electroorganic synthesis. The electrochemical dechlorination of pollutant organic chlorides, such as DDT, was effectively catalyzed by the B12 complex. Modification of the electrode surface by the sol-gel method to immobilize the B12 complex was also developed. The B12 modified electrodes were effective for the dehalogenation of organic halides with high turnover numbers based on the immobilized B12 complex. Electrolysis of an organic halide catalyzed by the B12 complex provided dechlorinated products under anaerobic conditions, while the electrolysis under aerobic conditions afforded oxygen incorporated products, such as an ester and amide along with dechlorination. Benzotrichloride was transformed into ethylbenzoate or N,N-diethylbenzamide in the presence of ethanol or diethylamine, respectively. This amide formation was further expanded to a unique paired electrolysis. Electrochemical reductions of an alkene and alkyne were also catalyzed by the B12 complex. A cobalt-hydrogen complex should be formed as a bioinspired intermediate. Using the B12 complex, light-assisted electrosynthesis was also developed to save the applied energy.
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Affiliation(s)
- Hisashi Shimakoshi
- Department of Chemistry and Biochemistry, Kyushu University, Nishi-ku Motooka 744, Fukuoka, 819-0395, Japan
| | - Yoshio Hisaeda
- Department of Chemistry and Biochemistry, Kyushu University, Nishi-ku Motooka 744, Fukuoka, 819-0395, Japan
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5
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Miyazaki Y, Oohora K, Hayashi T. Methane Generation and Reductive Debromination of Benzylic Position by Reconstituted Myoglobin Containing Nickel Tetradehydrocorrin as a Model of Methyl-coenzyme M Reductase. Inorg Chem 2020; 59:11995-12004. [PMID: 32794737 DOI: 10.1021/acs.inorgchem.0c00901] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Methyl-coenzyme M reductase (MCR), which contains the nickel hydrocorphinoid cofactor F430, is responsible for biological methane generation under anaerobic conditions via a reaction mechanism which has not been completely elucidated. In this work, myoglobin reconstituted with an artificial cofactor, nickel(I) tetradehydrocorrin (NiI(TDHC)), is used as a protein-based functional model for MCR. The reconstituted protein, rMb(NiI(TDHC)), is found to react with methyl donors such as methyl p-toluenesulfonate and trimethylsulfonium iodide with methane evolution observed in aqueous media containing dithionite. Moreover, rMb(NiI(TDHC)) is found to convert benzyl bromide derivatives to reductively debrominated products without homocoupling products. The reactivity increases in the order of primary > secondary > tertiary benzylic carbons, indicating steric effects on the reaction of the nickel center with the benzylic carbon in the initial step. In addition, Hammett plots using a series of para-substituted benzyl bromides exhibit enhancement of the reactivity with introduction of electron-withdrawing substituents, as shown by the positive slope against polar substituent constants. These results suggest a nucleophilic SN2-type reaction of the Ni(I) species with the benzylic carbon to provide an organonickel species as an intermediate. The reaction in D2O buffer at pD 7.0 causes a complete isotope shift of the product by +1 mass unit, supporting our proposal that protonation of the organonickel intermediate occurs during product formation. Although the turnover numbers are limited due to inactivation of the cofactor by side reactions, the present findings will contribute to elucidating the reaction mechanism of MCR-catalyzed methane generation from activated methyl sources and dehalogenation.
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Affiliation(s)
- Yuta Miyazaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita 565-0871, Japan
| | - Koji Oohora
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita 565-0871, Japan
| | - Takashi Hayashi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita 565-0871, Japan
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6
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Potrząsaj A, Ociepa M, Baka O, Spólnik G, Gryko D. Vitamin B12
Enables Consecutive Generation of Acyl and Alkyl Radicals from One Reagent. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901137] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Aleksandra Potrząsaj
- Institute of Organic Chemistry Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Michał Ociepa
- Institute of Organic Chemistry Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Oskar Baka
- Institute of Organic Chemistry Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Grzegorz Spólnik
- Institute of Organic Chemistry Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Dorota 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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Tahara K, Pan L, Ono T, Hisaeda Y. Learning from B 12 enzymes: biomimetic and bioinspired catalysts for eco-friendly organic synthesis. Beilstein J Org Chem 2018; 14:2553-2567. [PMID: 30410616 PMCID: PMC6204771 DOI: 10.3762/bjoc.14.232] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 09/13/2018] [Indexed: 01/12/2023] Open
Abstract
Cobalamins (B12) play various important roles in vivo. Most B12-dependent enzymes are divided into three main subfamilies: adenosylcobalamin-dependent isomerases, methylcobalamin-dependent methyltransferases, and dehalogenases. Mimicking these B12 enzyme functions under non-enzymatic conditions offers good understanding of their elaborate reaction mechanisms. Furthermore, bio-inspiration offers a new approach to catalytic design for green and eco-friendly molecular transformations. As part of a study based on vitamin B12 derivatives including heptamethyl cobyrinate perchlorate, we describe biomimetic and bioinspired catalytic reactions with B12 enzyme functions. The reactions are classified according to the corresponding three B12 enzyme subfamilies, with a focus on our recent development on electrochemical and photochemical catalytic systems. Other important reactions are also described, with a focus on radical-involved reactions in terms of organic synthesis.
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Affiliation(s)
- Keishiro Tahara
- Department of Material Science, Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako 678-1297, Japan
| | - Ling Pan
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Toshikazu Ono
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Center for Molecular Systems (CMS), Kyushu University, Fukuoka 819-0395, Japan.,PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Yoshio Hisaeda
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Center for Molecular Systems (CMS), Kyushu University, Fukuoka 819-0395, Japan
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8
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Reprint of: Impact of the corrin framework of vitamin B12 on the electrochemical carbon-skeleton rearrangement in comparison to an imine/oxime planar ligand; tuning selectivity in 1,2-migration of a functional group by controlling electrolysis potential. J Inorg Biochem 2017; 177:438-443. [DOI: 10.1016/j.jinorgbio.2017.09.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 06/27/2017] [Accepted: 07/18/2017] [Indexed: 11/20/2022]
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9
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Tahara K, Pan L, Yamaguchi R, Shimakoshi H, Abe M, Hisaeda Y. Impact of the corrin framework of vitamin B 12 on the electrochemical carbon-skeleton rearrangement in comparison to an imine/oxime planar ligand; tuning selectivity in 1,2-migration of a functional group by controlling electrolysis potential. J Inorg Biochem 2017; 175:239-243. [PMID: 28802222 DOI: 10.1016/j.jinorgbio.2017.07.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 06/27/2017] [Accepted: 07/18/2017] [Indexed: 11/16/2022]
Abstract
Among the coenzyme B12-dependent enzymes, methylmalonyl-CoA mutase (MMCM) catalyzes the carbon-skeleton rearrangement reaction between R-methylmalonyl-CoA and succinyl-CoA. Diethyl 2-bromomethyl-2-phenylmalonate, an alkyl bromide substrate having two different migrating groups (phenyl and carboxylic ester groups) on the β-carbon, was applied to the electrolysis mediated by a hydrophobic vitamin B12 model complex, heptamethyl cobyrinate perchlorate in this study. The electrolysis of the substrate at -1.0V vs. Ag-AgCl by light irradiation afforded the simple reduced product (diethyl 2-methyl-2-phenylmalonate) and the phenyl migrated product (diethyl 2-benzyl-2-phenylmalonate), as well as the electrolysis of the substrate at -1.5V vs. Ag-AgCl in the dark. The electrolysis of the substrate at -2.0V vs. Ag-AgCl afforded the carboxylic ester migrated product (diethyl phenylsuccinate) as the major product. The selectivity for the migrating group was successfully tuned by controlling the electrolysis potential. We clarified that the cathodic chemistry of the Co(III) alkylated heptamethyl cobyrinate is critical for the selectivity of the migrating group through mechanistic investigations and comparisons to the simple vitamin B12 model complex, an imine/oxime-type cobalt complex.
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Affiliation(s)
- Keishiro Tahara
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan; Department of Material Science, Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako 6781297, Japan
| | - Ling Pan
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan; Department of Chemistry, Northeast Normal University, Changchun 130024, PR China
| | - Ryoko Yamaguchi
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan
| | - Hisashi Shimakoshi
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan
| | - Masaaki Abe
- Department of Material Science, Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako 6781297, Japan
| | - Yoshio Hisaeda
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan; Center for Molecular Systems (CMS), Kyushu University, Fukuoka 819-0395, Japan.
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10
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Shimakoshi H, Hisaeda Y. A Hybrid Catalyst for Light-Driven Green Molecular Transformations. Chempluschem 2016; 82:18-29. [DOI: 10.1002/cplu.201600303] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 07/26/2016] [Indexed: 01/03/2023]
Affiliation(s)
- Hisashi Shimakoshi
- Department of Chemistry and Biochemistry; Graduate School of Engineering; Kyushu University; 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Yoshio Hisaeda
- Department of Chemistry and Biochemistry; Graduate School of Engineering; Kyushu University; 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
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11
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Giedyk M, Shimakoshi H, Goliszewska K, Gryko D, Hisaeda Y. Electrochemistry and catalytic properties of amphiphilic vitamin B12 derivatives in nonaqueous media. Dalton Trans 2016; 45:8340-6. [PMID: 26974051 DOI: 10.1039/c6dt00355a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reduction pathway of cobalester (CN)Cble, an amphiphilic vitamin B12 derivative, was investigated in organic solvents under electrochemical conditions and compared with mono- and dicyanocobyrinates. The redox characteristics were determined using cyclic voltammetry and spectroelectrochemical methods. The presence of a nucleotide moiety in B12-derivative impedes the in situ formation of dicyano-species thus facilitating the (CN)Co(iii) to Co(i) reduction. The (CN)Cble shows stepwise reduction to Co(i) via (CN)Co(ii). The reduction of (CN)Co(ii)/Co(i) was found to depend on cyanide-solvent exchange equilibrium with weakly coordinating solvents and bulky peripheral chains promoting intact (CN)Co(ii) species existence. The studied complexes were also utilized as catalysts in bulk electrolysis of benzyl bromide affording bibenzyl in very good yield.
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Affiliation(s)
- M Giedyk
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - H Shimakoshi
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka, 819-0395, Japan.
| | - K Goliszewska
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - D Gryko
- Institute of Organic Chemistry Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.
| | - Y Hisaeda
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka, 819-0395, Japan.
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12
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Ó Proinsias K, Ociepa M, Pluta K, Chromiński M, Nexo E, Gryko D. Vitamin B12Phosphate Conjugation and Its Effect on Binding to the Human B12-Binding Proteins Intrinsic Factor and Haptocorrin. Chemistry 2016; 22:8282-9. [DOI: 10.1002/chem.201504898] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Keith Ó Proinsias
- Institute of Organic Chemistry PAS; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Michał Ociepa
- Institute of Organic Chemistry PAS; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Katarzyna Pluta
- Institute of Organic Chemistry PAS; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Mikołaj Chromiński
- Institute of Organic Chemistry PAS; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Ebba Nexo
- Department of Clinical Biochemistry; Aarhus University Hospital; Norrebrogade 44 8000 Aarhus Denmark
| | - Dorota Gryko
- Institute of Organic Chemistry PAS; Kasprzaka 44/52 01-224 Warsaw Poland
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13
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Galán E, Perrin ML, Lutz M, van der Zant HSJ, Grozema FC, Eelkema R. Synthesis of 1,2-biphenylethane based single-molecule diodes. Org Biomol Chem 2016; 14:2439-43. [PMID: 26809645 DOI: 10.1039/c6ob00008h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We have described the synthesis of novel biphenylethane-based wires for molecular electronics. Exceptional single-molecule diode behavior was predicted for unsymmetrically substituted biphenylethane derivatives, synthesized here using the so far unexplored unsymmetrically substituted 1,2-bis(4-bromophenyl)ethanes as key intermediates, which were obtained from the corresponding tolane precursor by selective hydrogenation.
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Affiliation(s)
- Elena Galán
- Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands.
| | - Mickael L Perrin
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - Martin Lutz
- Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Herre S J van der Zant
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - Ferdinand C Grozema
- Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands.
| | - Rienk Eelkema
- Department of Chemical Engineering, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands.
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14
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Giedyk M, Goliszewska K, ó Proinsias K, Gryko D. Cobalt(i)-catalysed CH-alkylation of terminal olefins, and beyond. Chem Commun (Camb) 2016; 52:1389-92. [DOI: 10.1039/c5cc07363d] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Cobalester, a natural nontoxic vitamin B12 derivative, was found to catalyse unusual olefinic sp2 C–H alkylation with diazo reagents as a carbene source instead of the expected cyclopropanation.
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Affiliation(s)
- Maciej Giedyk
- Institute of Organic Chemistry Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | | | - Keith ó Proinsias
- Institute of Organic Chemistry Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - Dorota Gryko
- Institute of Organic Chemistry Polish Academy of Sciences
- 01-224 Warsaw
- Poland
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15
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Shimakoshi H, Hisaeda Y. Oxygen-Controlled Catalysis by Vitamin B12-TiO2: Formation of Esters and Amides from Trichlorinated Organic Compounds by Photoirradiation. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507782] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Shimakoshi H, Hisaeda Y. Oxygen‐Controlled Catalysis by Vitamin B
12
‐TiO
2
: Formation of Esters and Amides from Trichlorinated Organic Compounds by Photoirradiation. Angew Chem Int Ed Engl 2015; 54:15439-43. [DOI: 10.1002/anie.201507782] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 10/09/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Hisashi Shimakoshi
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka, 819‐0395 (Japan)
| | - Yoshio Hisaeda
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Fukuoka, 819‐0395 (Japan)
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17
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Abstract
This tutorial review focuses on cobalamin as a natural, nontoxic, environmentally benign cobalt catalyst for synthetically useful organic reactions.
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Affiliation(s)
- Maciej Giedyk
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
| | - Katarzyna Goliszewska
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
- Faculty of Chemistry
| | - Dorota Gryko
- Institute of Organic Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
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