1
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Mayorquín-Torres MC, Simoens A, Bonneure E, Stevens CV. Synthetic Methods for Azaheterocyclic Phosphonates and Their Biological Activity: An Update 2004-2024. Chem Rev 2024; 124:7907-7975. [PMID: 38809666 DOI: 10.1021/acs.chemrev.4c00090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
The increasing importance of azaheterocyclic phosphonates in the agrochemical, synthetic, and medicinal field has provoked an intense search in the development of synthetic routes for obtaining novel members of this family of compounds. This updated review covers methodologies established since 2004, focusing on the synthesis of azaheterocyclic phosphonates, of which the phosphonate moiety is directly substituted onto to the azaheterocyclic structure. Emphasizing recent advances, this review classifies newly developed synthetic approaches according to the ring size and providing information on biological activities whenever available. Furthermore, this review summarizes information on various methods for the formation of C-P bonds, examining sustainable approaches such as the Michaelis-Arbuzov reaction, the Michaelis-Becker reaction, the Pudovik reaction, the Hirao coupling, and the Kabachnik-Fields reaction. After analyzing the biological activities and applications of azaheterocyclic phosphonates investigated in recent years, a predominant focus on the evaluation of these compounds as anticancer agents is evident. Furthermore, emerging applications underline the versatility and potential of these compounds, highlighting the need for continued research on synthetic methods to expand this interesting family.
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Affiliation(s)
- Martha C Mayorquín-Torres
- SynBioC Research Group, Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Andreas Simoens
- SynBioC Research Group, Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Eli Bonneure
- SynBioC Research Group, Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Christian V Stevens
- SynBioC Research Group, Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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2
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Rrapi M, Batsika CS, Nikitas NF, Tappin NDC, Triandafillidi I, Renaud P, Kokotos CG. Photochemical Synthesis of Lactones, Cyclopropanes and ATRA Products: Revealing the Role of Sodium Ascorbate. Chemistry 2024; 30:e202400253. [PMID: 38324672 DOI: 10.1002/chem.202400253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 02/06/2024] [Accepted: 02/06/2024] [Indexed: 02/09/2024]
Abstract
Light-mediated processes have received significant attention, since they have re-surfaced unconventional reactivity platforms, complementary to conventional polar chemistry. γ-Lactones and cyclopropanes are prevalent moieties, found in numerous natural products and pharmaceuticals. Among various methods for their synthesis, light-mediated protocols are coming to the spotlight, although these are contingent upon the use of photoorgano- or metal-based catalysts. Herein, we introduce a novel photochemical activation of iodo-reagents via the use of cheap sodium ascorbate or ascorbic acid to enable their homolytic scission and addition onto double bonds. The developed protocol was applied successfully to the formal [3+2] cycloaddition for the synthesis of γ-lactones, traditional atom transfer radical addition (ATRA) reactions and the one-pot two-step conversion of alkenes to cyclopropanes. In all cases, the desired products were obtained in good to high yields, while the reaction mechanism was thoroughly investigated. Depending on the nature of the iodo-reagent, a halogen or a hydrogen-bonded complex is formed, which initiates the process.
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Affiliation(s)
- Marie Rrapi
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens, 15771, Greece
| | - Charikleia S Batsika
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens, 15771, Greece
| | - Nikolaos F Nikitas
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens, 15771, Greece
- Department of Chemistry, Biochemistry, and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012, Bern, Switzerland
| | - Nicholas D C Tappin
- Department of Chemistry, Biochemistry, and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012, Bern, Switzerland
| | - Ierasia Triandafillidi
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens, 15771, Greece
| | - Philippe Renaud
- Department of Chemistry, Biochemistry, and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012, Bern, Switzerland
| | - Christoforos G Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens, 15771, Greece
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3
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Chen Y, Zhang S, Li Y, Li T, Ma Q, Yuan Y, Jia X. CBr 4 as a Mild Oxidant-Enabled Oxidation of a sp 3 C-H Bond: A Facile Synthesis of the Persistent Iminium Salts of Tetrahydroisoquinolines. Chemistry 2024; 30:e202303952. [PMID: 38193608 DOI: 10.1002/chem.202303952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 12/26/2023] [Accepted: 01/04/2024] [Indexed: 01/10/2024]
Abstract
Using CBr4 as a mild oxidant, the direct C-H bond oxidation of N-aryltetrahydroisoquinolines was achieved, giving a series of the corresponding iminium salts in high yields under metal- and photo-free reaction conditions. This reaction is superior in high yields and good functional group tolerance, and the late-stage derivatization showed that these iminium salts can readily be applied to the synthesis of the functionalized THIQs.
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Affiliation(s)
- Yuqin Chen
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Shuwei Zhang
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Yuemei Li
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Tong Li
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Qiyuan Ma
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Yu Yuan
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
| | - Xiaodong Jia
- School of Chemistry and Chemical Engineering, Yangzhou University, Siwangting Road 180, Yangzhou, Jiangsu, China, 225002
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4
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Chen H, Ma R, Zhang Y, Zhang T, Jing B, Xia Z, Yang Q, Xie G, Chen S. A Stable Triphenylamine-Based Zn(II)-MOF for Photocatalytic H 2 Evolution and Photooxidative Carbon-Carbon Coupling Reaction. Inorg Chem 2023; 62:7954-7963. [PMID: 37154624 DOI: 10.1021/acs.inorgchem.3c00763] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Efficient charge transfer has always been a challenge in heterogeneous MOF-based photoredox catalysis due to the poor electrical conductivity of the MOF photocatalyst, the toilless electron-hole recombination, and the uncontrollable host-guest interactions. Herein, a propeller-like tris(3'-carboxybiphenyl)amine (H3TCBA) ligand was synthesized to fabricate a 3D Zn3O cluster-based Zn(II)-MOF photocatalyst, Zn3(TCBA)2(μ3-H2O)H2O (Zn-TCBA), which was applied to efficient photoreductive H2 evolution and photooxidative aerobic cross-dehydrogenation coupling reactions of N-aryl-tetrahydroisoquinolines and nitromethane. In Zn-TCBA, the ingenious introduction of the meta-position benzene carboxylates on the triphenylamine motif not only promotes Zn-TCBA to exhibit a broad visible-light absorption with a maximum absorption edge of 480 nm but also causes special phenyl plane twists with dihedral angles of 27.8-45.8° through the coordination to Zn nodes. The semiconductor-like Zn clusters and the twisted TCBA3- antenna with multidimensional π interaction sites facilitate photoinduced electron transfer to render Zn-TCBA a good photocatalytic H2 evolution efficiency of 27.104 mmol·g-1·h-1 in the presence of [Co(bpy)3]Cl2 under visible-light illumination, surpassing many non-noble-metal MOF systems. Moreover, the positive enough excited-state potential of 2.03 V and the semiconductor-like characteristics of Zn-TCBA endow Zn-TCBA with double oxygen activation ability for photocatalytic oxidation of N-aryl-tetrahydroisoquinoline substrates with a yield up to 98.7% over 6 h. The durability of Zn-TCBA and the possible catalytic mechanisms were also investigated by a series of experiments including PXRD, IR, EPR, and fluorescence analyses.
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Affiliation(s)
- Hanhua Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Ren Ma
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Yifan Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Tingting Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Biyun Jing
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Zhengqiang Xia
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Qi Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Gang Xie
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
| | - Sanping Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, China
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5
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Tamatam R, Shin D. Recent Advances in the Transition-Metal-Free Synthesis of Quinazolines. Molecules 2023; 28:molecules28073227. [PMID: 37049989 PMCID: PMC10147101 DOI: 10.3390/molecules28073227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 03/29/2023] [Accepted: 04/03/2023] [Indexed: 04/14/2023] Open
Abstract
Quinazolines are a privileged class of nitrogen-containing heterocycles, widely present in a variety of natural products and synthetic chemicals with a broad spectrum of biological and medicinal activities. Owing to their pharmaceutical applications and promising biological value, a variety of synthetic methodologies have been reported for these scaffolds. From the perspective of green and sustainable chemistry, transition-metal-free synthesis provides an alternative method for accessing several biologically active heterocycles. In this review, we summarize the recent progress achieved in the transition-metal-free synthesis of quinazolines and we cover the literature from 2015 to 2022. This aspect is present alongside the advantages, limitations, mechanistic rationalization, and future perspectives associated with the synthetic methodologies.
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Affiliation(s)
- Rekha Tamatam
- College of Pharmacy, Gachon University, 191 Hambakmoe-ro, Yeonsu-gu, Incheon 21936, Republic of Korea
- Gachon Pharmaceutical Research Institute, Gachon University, 191 Hambakmoe-ro, Yeonsu-gu, Incheon 21936, Republic of Korea
| | - Dongyun Shin
- College of Pharmacy, Gachon University, 191 Hambakmoe-ro, Yeonsu-gu, Incheon 21936, Republic of Korea
- Gachon Pharmaceutical Research Institute, Gachon University, 191 Hambakmoe-ro, Yeonsu-gu, Incheon 21936, Republic of Korea
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6
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Saunthwal RK, Schwarz M, Mallick RK, Terry-Wright W, Clayden J. Enantioselective Intramolecular α-Arylation of Benzylamine Derivatives: Synthesis of a Precursor to Levocetirizine. Angew Chem Int Ed Engl 2023; 62:e202216758. [PMID: 36698284 DOI: 10.1002/anie.202216758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/20/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
A practical, transition metal-free method allows the enantioselective synthesis of α,α-diarylmethylamines by asymmetric α-arylation of benzylamines. Enantioselective lithiation of N'-aryl-N-benzyl-N-isopropyl ureas using a chiral lithium amide base generates a benzyllithium that undergoes an unactivated stereospecific intramolecular nucleophilic aromatic substitution to generate an α,α-diarylmethylamine in the form of its urea derivative, in up to >99 % ee. Treatment with acid induces an "azatropic shift" with retention of configuration, the product of which may be hydrolysed to the target amine.
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Affiliation(s)
- Rakesh K Saunthwal
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Maria Schwarz
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Rajendra K Mallick
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - William Terry-Wright
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Jonathan Clayden
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
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7
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Liu B, Li J, Hu Y, Chen Q, Liu Y, Ji S, Maruoka K, Huo Y, Zhang HL. Visible-Light-Induced α-C(sp 3)-H Phosphinylation of Unactivated Ethers under Photocatalyst- and Additive-Free Conditions. J Org Chem 2022; 87:11281-11291. [PMID: 35930606 DOI: 10.1021/acs.joc.2c01502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A photocatalyst- and additive-free visible-light-induced α-C(sp3)-H phosphinylation of unactivated ethers involving a C-O bond cleavage with molecular oxygen as the sole oxidant at room temperature has been achieved. This method provides a sustainable access to α-hydroxyphosphine oxides in up to 88% yield with good functional group compatibility under mild and neutral conditions (34 examples). Moreover, the subsequent two-step conversion of the resulting dihydroxy diarylphosphine oxides afforded α-phosphinylated cyclic ethers in good overall yields (10 examples).
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Affiliation(s)
- Bo Liu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Jianji Li
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Yifan Hu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Qian Chen
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Yan Liu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Shaomin Ji
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Keiji Maruoka
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo, Kyoto 606-8501, Japan
| | - Yanping Huo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China
| | - Hao-Li Zhang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, P. R. China.,State Key Laboratory of Applied Organic Chemistry (SKLAOC), Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
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8
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Jeremias N, Peschel MT, Jaschke C, de Vivie-Riedle R, Bach T. Photochemical Ring Contraction of 5,5-Dialkylcyclopent-2-enones and in situ Trapping by Primary Amines. J Org Chem 2022; 88:6294-6303. [PMID: 35786889 DOI: 10.1021/acs.joc.2c01156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
If substituted in the 5,5-position, cyclopent-2-enones undergo a smooth photochemical rearrangement to ketenes. A concomitant cyclopropane formation occurs due to a 1,3-shift of the C5 carbon atom from the carbonyl carbon atom (C1) to carbon atom C3. In this study, the cyclopropyl-substituted ketene intermediates were trapped in situ by primary amines providing an efficient entry into 2,2-disubstituted cyclopropaneacetic amides (24 examples, 49-95% yield). A remarkable feature of the reaction is the fact that the photochemical rearrangement can occur from either the first excited singlet (S1) or the respective triplet state (T1). In line with experimental results (triplet quenching, sensitization), XMS-CASPT2 calculations support the existence of efficient reaction pathways to the intermediate ketene both on the singlet and on the triplet hypersurface.
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Affiliation(s)
- Noah Jeremias
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Martin T Peschel
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, 81377 München, Germany
| | - Constantin Jaschke
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, 81377 München, Germany
| | - Regina de Vivie-Riedle
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, 81377 München, Germany
| | - Thorsten Bach
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
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9
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Kostromitin VS, Levin VV, Dilman AD. Organophotoredox-Catalyzed Reductive Tetrafluoroalkylation of Alkenes. J Org Chem 2022; 88:6523-6531. [PMID: 35561256 DOI: 10.1021/acs.joc.2c00712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A method for the hydroperfluoroalkylation of alkenes with 1,2-dibromotetrafluoroethane leading to tetrafluorinated bromides is described. The reaction is conveniently performed under blue light irradiation using an organic photocatalyst and ascorbic acid as a reducing agent. Primary products can be further functionalized via radical pathways affording various tetrafluorinated compounds.
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Affiliation(s)
- Vladislav S Kostromitin
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky prosp. 47, 119991 Moscow, Russian Federation.,Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1-3, 119991 Moscow, Russian Federation
| | - Vitalij V Levin
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky prosp. 47, 119991 Moscow, Russian Federation
| | - Alexander D Dilman
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky prosp. 47, 119991 Moscow, Russian Federation
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10
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Zheng B, Xue L, Dai C, Liu J, Cheng H. Direct Phosphonylation of N-Phenyltetrahydroisoquinolines in Microdroplets. J Org Chem 2022; 87:5287-5295. [PMID: 35333518 DOI: 10.1021/acs.joc.2c00081] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Because of their unique properties and high biological activities, organophosphorus compounds have been used worldwide in agricultural, industrial, medicinal, and veterinary applications. Conventional strategies for direct phosphonylation suffer from the usage of stoichiometric or excessive metallic or nonmetallic catalysts and long reaction times under harsh conditions, leading to a strong desire for environment-friendly protocols for phosphonylation. A protocol for the accelerated phosphonylation of N-phenyltetrahydroisoquinolines in minutes was developed without the use of any catalyst in microdroplets. The phosphonylation process was completed (>85% yields) in 10 min at 40 °C using 0.8 equiv 2,3-dicyano-5,6-dichlorobenzoquinone as the oxidant and acetonitrile as the solvent. The microdroplet phosphonylation strategy showed good suitability to alkyl phosphites and N-phenyltetrahydroisoquinolines bearing electron-withdrawing and electron-donating substitutes, and the yields of the microdroplet reaction were much greater than those of the bulk (accelerated by two orders of magnitude from the ratio of the rate constants using the microdroplet and the bulk method). Furthermore, microdroplet phosphonylation can be scaled up to a 1-phenyl-2-dimethylphosphonite-1,2,3,4-tetrahydroisoquinoline amount of 510 mg h-1 by spraying 0.1 mol L-1 N-phenyltetrahydroisoquinoline at 300 μL min-1. These figures of merit make it a promising alternative to classic organic methodologies for the synthesis of organophosphorus compounds.
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Affiliation(s)
- Boyu Zheng
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Luyun Xue
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Chengbiao Dai
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Jinhua Liu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
| | - Heyong Cheng
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, Zhejiang 311121, People's Republic of China
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11
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Lindroth R, Ondrejková A, Wallentin CJ. Visible-Light Mediated Oxidative Fragmentation of Ethers and Acetals by Means of Fe(III) Catalysis. Org Lett 2022; 24:1662-1667. [PMID: 35192351 PMCID: PMC8902804 DOI: 10.1021/acs.orglett.2c00231] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
![]()
A new method employing
iron(III) acetylacetonate along with visible
light is described to effect oxidative ring opening of cyclic ethers
and acetals with unparalleled efficiency. The method allows for a
photocatalytic radical chemistry approach to functionalize relatively
inert cyclic ethers into useful synthetic intermediates. The methodology
sheds further light on the use of underexplored iron complexes in
visible-light photochemical contexts and illustrates that simple Fe(III)
complexes can initiate redox processes from 4LMCT excited
states.
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Affiliation(s)
- Rickard Lindroth
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - Alica Ondrejková
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - Carl-Johan Wallentin
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
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12
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Tay NES, Lehnherr D, Rovis T. Photons or Electrons? A Critical Comparison of Electrochemistry and Photoredox Catalysis for Organic Synthesis. Chem Rev 2022; 122:2487-2649. [PMID: 34751568 PMCID: PMC10021920 DOI: 10.1021/acs.chemrev.1c00384] [Citation(s) in RCA: 110] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Redox processes are at the heart of synthetic methods that rely on either electrochemistry or photoredox catalysis, but how do electrochemistry and photoredox catalysis compare? Both approaches provide access to high energy intermediates (e.g., radicals) that enable bond formations not constrained by the rules of ionic or 2 electron (e) mechanisms. Instead, they enable 1e mechanisms capable of bypassing electronic or steric limitations and protecting group requirements, thus enabling synthetic chemists to disconnect molecules in new and different ways. However, while providing access to similar intermediates, electrochemistry and photoredox catalysis differ in several physical chemistry principles. Understanding those differences can be key to designing new transformations and forging new bond disconnections. This review aims to highlight these differences and similarities between electrochemistry and photoredox catalysis by comparing their underlying physical chemistry principles and describing their impact on electrochemical and photochemical methods.
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Affiliation(s)
- Nicholas E S Tay
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Dan Lehnherr
- Process Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Tomislav Rovis
- Department of Chemistry, Columbia University, New York, New York 10027, United States
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13
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Chaibuth P, Chuaytanee N, Hojitsiriyanont J, Chainok K, Wacharasindhu S, Reiser O, Sukwattanasinitt M. Copper( ii) complexes of quinoline-based ligands for efficient photoredox catalysis of atom transfer radical addition (ATRA) reaction. NEW J CHEM 2022. [DOI: 10.1039/d2nj01218a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Cu(ii)·1Q is efficient in ATRA reactions with perhaloalkanes, revealing the role of common additives (AIBN or inorganic base).
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Affiliation(s)
- Pawittra Chaibuth
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
- Institut für Organische Chemie Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Nontakarn Chuaytanee
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Jutawat Hojitsiriyanont
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Kittipong Chainok
- Materials and Textiles Technology, Faculty of Science and Technology, Thammasat University, Klong Luang, Pathum Thani 12120, Thailand
| | - Sumrit Wacharasindhu
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Oliver Reiser
- Institut für Organische Chemie Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
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14
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Wang DJ, Targos K, Wickens ZK. Electrochemical Synthesis of Allylic Amines from Terminal Alkenes and Secondary Amines. J Am Chem Soc 2021; 143:21503-21510. [PMID: 34914394 DOI: 10.1021/jacs.1c11763] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Allylic amines are valuable synthetic targets en route to diverse biologically active amine products. Current allylic C-H amination strategies remain limited with respect to the viable N-substituents. Herein, we disclose a new electrochemical process to prepare aliphatic allylic amines by coupling two abundant starting materials: secondary amines and unactivated alkenes. This oxidative transformation proceeds via electrochemical generation of an electrophilic adduct between thianthrene and the alkene substrates. Treatment of these adducts with aliphatic amine nucleophiles and base provides allylic amine products in high yield. This synthetic strategy is also amenable to functionalization of feedstock gaseous alkenes at 1 atm. In the case of 1-butene, high Z-selective crotylation is observed. This strategy, however, is not limited to the synthesis of simple building blocks; complex biologically active molecules are suitable as both alkene and amine coupling partners. Preliminary mechanistic studies implicate vinylthianthrenium salts as key reactive intermediates.
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Affiliation(s)
- Diana J Wang
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Karina Targos
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Zachary K Wickens
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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15
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Deb ML, Saikia BS, Borpatra PJ, Baruah PK. Progress of metal‐free visible‐light‐driven a‐C‐H functionalization of tertiary amines: A decade journey. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100706] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | | | | | - Pranjal K. Baruah
- GUIST, Gauhati University Applied Sciences Gopinath Bordoloi Nagar 781014 Guwahati INDIA
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16
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Yi MJ, Xiao TF, Li WH, Zhang YF, Yan PJ, Zhang B, Xu PF, Xu GQ. Organic photoredox catalytic α-C(sp 3)-H phosphorylation of saturated aza-heterocycles. Chem Commun (Camb) 2021; 57:13158-13161. [PMID: 34812446 DOI: 10.1039/d1cc05767g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A metal-free C(sp3)-H phosphorylation of saturated aza-heterocycles via the merger of organic photoredox and Brønsted acid catalyses was established under mild conditions. This protocol provided straightforward and economic access to a variety of valuable α-phosphoryl cyclic amines by using commercially available diarylphosphine oxide reagents. In addition, the D-A fluorescent molecule DCQ was used for the first time as a photocatalyst and exhibited an excellent photoredox catalytic efficiency in this transformation. A series of mechanistic experiments and DFT calculations demonstrated that this transformation underwent a sequential visible light photoredox catalytic oxidation/nucleophilic addition process.
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Affiliation(s)
- Ming-Jun Yi
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Teng-Fei Xiao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Wen-Hui Li
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Yi-Fan Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Pen-Ji Yan
- Key Laboratory of Hexi Corridor Resources Utilization of Gansu Universities, College of Chemistry and Chemical Engineering, Hexi University, Zhangye 734000, P. R. China
| | - Baoxin Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China. .,State Key Laboratory of Veterinary Etiological Biology, College of Veterinary Medicine, Lanzhou University, Lanzhou 730000, P. R. China
| | - Guo-Qiang Xu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China.
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17
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Petek N, Brodnik H, Grošelj U, Svete J, Požgan F, Štefane B. Visible-Light Driven Selective C-N Bond Scission in anti-Bimane-Like Derivatives. Org Lett 2021; 23:5294-5298. [PMID: 34077227 PMCID: PMC8832495 DOI: 10.1021/acs.orglett.1c01376] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the present study, we report the photochemical transformation of pyrazolo[1,2-a]pyrazolone substrates that reach an excited state upon irradiation with visible light to initiate the homolytic C-N bond cleavage process that yields the corresponding N1-substituted pyrazoles. Moreover, chemoselective heterolytic C-N bond cleavage is possible in the pyrazolo[1,2-a]pyrazole core in the presence of bromomalonate.
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Affiliation(s)
- Nejc Petek
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Helena Brodnik
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Uroš Grošelj
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Jurij Svete
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Franc Požgan
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Bogdan Štefane
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
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18
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Roslan II, Zhang H, Ng K, Jaenicke S, Chuah G. A Visible Light and Iron‐mediated Carbocationic Route to Polysubstituted 1‐Halonaphthalenes by Benzannulation using Allylbenzenes and Polyhalomethanes. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001249] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Irwan Iskandar Roslan
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Fax
| | - Hongwei Zhang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Fax
| | - Kian‐Hong Ng
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Fax
| | - Stephan Jaenicke
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Fax
| | - Gaik‐Khuan Chuah
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Fax
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19
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Urban RD, Fischer TG, Charvat A, Wink K, Krafft B, Ohla S, Zeitler K, Abel B, Belder D. On-chip mass spectrometric analysis in non-polar solvents by liquid beam infrared matrix-assisted laser dispersion/ionization. Anal Bioanal Chem 2021; 413:1561-1570. [PMID: 33479818 PMCID: PMC7921053 DOI: 10.1007/s00216-020-03115-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 12/01/2020] [Accepted: 12/07/2020] [Indexed: 12/15/2022]
Abstract
By the on-chip integration of a droplet generator in front of an emitter tip, droplets of non-polar solvents are generated in a free jet of an aqueous matrix. When an IR laser irradiates this free liquid jet consisting of water as the continuous phase and the non-polar solvent as the dispersed droplet phase, the solutes in the droplets are ionized. This ionization at atmospheric pressure enables the mass spectrometric analysis of non-polar compounds with the aid of a surrounding aqueous matrix that absorbs IR light. This works both for non-polar solvents such as n-heptane and for water non-miscible solvents like chloroform. In a proof of concept study, this approach is applied to monitor a photooxidation of N-phenyl-1,2,3,4-tetrahydroisoquinoline. By using water as an infrared absorbing matrix, analytes, dissolved in non-polar solvents from reactions carried out on a microchip, can be desorbed and ionized for investigation by mass spectrometry.
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Affiliation(s)
- Raphael D Urban
- Institut für Analytische Chemie, Leipzig University, Linnéstraße 3, 04103, Leipzig, Germany
| | - Tillmann G Fischer
- Institut für Organische Chemie, Leipzig University, Johannisallee 29, 04103, Leipzig, Germany
| | - Ales Charvat
- Leibniz-Institut für Oberflächenmodifizierung e.V., Abteilung Funktionale Oberflächen, Permoserstr. 15, 04318, Leipzig, Germany
| | - Konstantin Wink
- Institut für Analytische Chemie, Leipzig University, Linnéstraße 3, 04103, Leipzig, Germany
| | - Benjamin Krafft
- Institut für Analytische Chemie, Leipzig University, Linnéstraße 3, 04103, Leipzig, Germany
| | - Stefan Ohla
- Institut für Analytische Chemie, Leipzig University, Linnéstraße 3, 04103, Leipzig, Germany
| | - Kirsten Zeitler
- Institut für Organische Chemie, Leipzig University, Johannisallee 29, 04103, Leipzig, Germany
| | - Bernd Abel
- Leibniz-Institut für Oberflächenmodifizierung e.V., Abteilung Funktionale Oberflächen, Permoserstr. 15, 04318, Leipzig, Germany
| | - Detlev Belder
- Institut für Analytische Chemie, Leipzig University, Linnéstraße 3, 04103, Leipzig, Germany.
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20
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Huang Y, Chen Q. Recent Advances in C(sp 3)—H Phosphorylation Based on Secondary Phosphine Oxides and Phosphite Esters. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202107044] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Ma P, Liu Y, Chen L, Zhao X, Yang B, Zhang J. Photocatalyst- and additive-free decarboxylative alkylation of N-aryl tetrahydroisoquinolines induced by visible light. Org Chem Front 2021. [DOI: 10.1039/d1qo00261a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
A photocatalyst- and additive-free visible light induced decarboxylative alkylation of N-aryl tetrahydroisoquinolines has been developed using tetrachloro-N-hydroxyphthalimide esters as alkylation agents.
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Affiliation(s)
- Pengju Ma
- International Joint Research Center for Molecular Science
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- P. R. China
| | - Yufei Liu
- International Joint Research Center for Molecular Science
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- P. R. China
| | - Lingling Chen
- International Joint Research Center for Molecular Science
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- P. R. China
| | - Xu Zhao
- Research Center for Eco-Environmental Sciences
- Chinese Academy of Sciences
- Beijing 100085
- China
| | - Bo Yang
- International Joint Research Center for Molecular Science
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- P. R. China
| | - Junmin Zhang
- International Joint Research Center for Molecular Science
- College of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen
- P. R. China
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22
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Metal‐free Photochemical Atom Transfer Radical Addition (ATRA) of BrCCl
3
to Alkenes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001387] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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23
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Li CJ, Ung SPM, Mechrouk VA. Shining Light on the Light-Bearing Element: A Brief Review of Photomediated C–H Phosphorylation Reactions. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1705978] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AbstractOrganophosphorus compounds have numerous useful applications, from versatile ligands and nucleophiles in the case of trivalent organophosphorus species to therapeutics, agrochemicals and material additives for pentavalent species. Although phosphorus chemistry is a fairly mature field, the construction of C–P(V) bonds relies heavily on either prefunctionalized substrates such as alkyl or aryl halides, or requires previously oxidized bonds such as C=N or C=O, leading to potential sustainability issues when looking at the overall synthetic route. In light of the recent advances in photochemistry, using photons as a reagent can provide better alternatives for phosphorylations by unlocking radical mechanisms and providing interesting redox pathways. This review will showcase the different photomediated phosphorylation procedures available for converting C–H bonds into C–P(V) bonds.1 Introduction1.1 Organophosphorus Compounds1.2 Phosphorylation: Construction of C–P(V) Bonds1.3 Photochemistry as an Alternative to Classical Phosphorylations2 Ionic Mechanisms Involving Nucleophilic Additions3 Mechanisms Involving Radical Intermediates3.1 Mechanisms Involving Reactive Carbon Radicals3.2 Mechanisms Involving Phosphorus Radicals3.2.1 Photoredox: Direct Creation of Phosphorus Radicals3.2.2 Photoredox: Indirect Creation of Phosphorus Radicals3.2.3 Dual Catalysis3.3 Photolytic Cleavage4 Conclusion and Outlook
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24
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Ibrahim HM, Behbehani H. Palladium-Catalyzed Q-Tube-Assisted Protocol for Synthesizing Diaza-dibenzo[ a, e]azulene and Diaza-benzo[ a]fluorene Derivatives via O 2 Acid-Promoted Cross-Dehydrogenative Coupling. J Org Chem 2020; 85:15368-15381. [PMID: 33147024 DOI: 10.1021/acs.joc.0c02186] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An appropriate and efficient Q-tube-assisted palladium-catalyzed strategy for the synthesis of novel, unparalleled diaza-dibenzo[a,e]azulene and diaza-benzo[a]fluorene derivatives has been sophisticated, which includes oxygen and AcOH-induced oxidative C(sp3)-C(sp2) cross-dehydrogenative coupling reactions of 1-amino-2-imino-4-arylpyridine-3-carbonitriles with benzocyclic ketones such as benzosuberone, tetralone, thiochromone, and chromone, respectively. This Q-tube gas purging kit assisted-protocol features safe due to easy pressing and sealing, a wide substrate scope, easy workup and purifying phases, and the use of O2 as a benign oxidant, in addition to being scalable and having a high atom economy. The suggested mechanistic pathway includes a formal dehydrative step followed by palladium AcOH-induced CH(sp3)-CH(sp2) oxidative cross-coupling. In this study, X-ray crystallographic analysis has been used to authenticate the targeted products.
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Affiliation(s)
- Hamada Mohamed Ibrahim
- Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait.,Chemistry Department, Faculty of Science, Fayoum University, P.O. Box 63514, Fayoum 63514, Egypt
| | - Haider Behbehani
- Chemistry Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
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25
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Talukdar R. Tracking down the brominated single electron oxidants in recent organic red-ox transformations: photolysis and photocatalysis. Org Biomol Chem 2020; 18:8294-8345. [PMID: 33020775 DOI: 10.1039/d0ob01652g] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A wide range of organic and inorganic brominated compounds including molecular bromine have been extensively used as oxidants in many organic photo-redox transformations in recent years, an area of ever growing interest because of greener and milder approaches. The oxidation power of these compounds is utilized through both mechanistic pathways (by hydrogen atom transfer or HAT in the absence of a photocatalyst and a combination of single electron transfer or SET and/or HAT in the presence of a photocatalyst). Not only as terminal oxidants for regeneration of photocatalysts, but brominated reactants have also contributed to the oxidation of the reaction intermediate(s) to carry on the radical chain process in several reactions. Here in this review mainly the non-brominative oxidative product formations are discussed, carried out since the last two decades, skipping the instances where they acted as terminal oxidants only to regenerate photocatalysts. The reactions are used to generate natural products, pharmaceuticals and beyond.
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Affiliation(s)
- Ranadeep Talukdar
- Molecular Synthesis and Drug Discovery Laboratory, Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow-226014, India.
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26
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Kouznetsov VV, Ortiz Villamizar MC, Puerto Galvis CE. The A3 Redox-Neutral C1-Alkynylation of Tetrahydroisoquinolines: A Comparative Study between Visible Light Photocatalysis and Transition-Metal Catalysis. SYNTHESIS-STUTTGART 2020. [DOI: 10.1055/s-0040-1707370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
AbstractConsidering the current challenges of the A3 redox-neutral C1-alkynylation of tetrahydroisoquinolines (THIQs), we studied this synthetic tool under visible light photocatalysis and transition-metal catalysis in order to describe alternative reaction conditions and discuss possible improvements to this process. We demonstrated that 1-alkynylated THIQs can be readily obtained by three different approaches: iridium-based photocatalysis and copper ([CuBr(PPh3)3]) and silver (AgNO3) catalysis under mild, selective and accessible reaction conditions. Among these approaches, the copper(I)-based methodology resulted in the most robust, optimal reaction conditions for the synthesis of a series of 18 1-alkynylated THIQs in moderate to excellent yields and with high selectivity for the endo-alkynylated products. Moreover, this reaction can be accelerated by microwave irradiation (120 °C, 15 min) affording a novel library of diverse THIQs with alkyne and N-substituent moieties, from unreactive and uncommon substrates, that could be further transformed into new compounds of interest.
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27
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Chen Z, Lin B, Chen L, Zou Y, Yan M, Zhang X. Perfluorobutyl Iodide Mediated [1,2] and [2,3] Stevens Rearrangement for the Synthesis of Indolin‐3‐Ones. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000427] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Zhen‐Yu Chen
- The Institute of Drug Synthesis and Pharmaceutical Process School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Bi‐Zhen Lin
- The Institute of Drug Synthesis and Pharmaceutical Process School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Lei Chen
- The Institute of Drug Synthesis and Pharmaceutical Process School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Yong Zou
- The Institute of Drug Synthesis and Pharmaceutical Process School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Ming Yan
- The Institute of Drug Synthesis and Pharmaceutical Process School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Xue‐Jing Zhang
- The Institute of Drug Synthesis and Pharmaceutical Process School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510006 People's Republic of China
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28
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Liu T, Li Y, Jiang L, Wang J, Jin K, Zhang R, Duan C. Photo-mediated synthesis of halogenated spiro[4,5]trienones of N-aryl alkynamides with PhI(OCOCF 3) 2 and KBr/KCl. Org Biomol Chem 2020; 18:1933-1939. [PMID: 32101242 DOI: 10.1039/d0ob00057d] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A novel and convenient photo-mediated halogenated spirocyclization of N-(p-methoxyaryl)propiolamides has been developed. The photolysis of phenyliodine bis(trifluoroacetate) (PIFA) as an iodination reagent led to iodinated ipso-cyclization under the irradiation of a xenon lamp, while brominated ipso-cyclization or chlorinated ipso-cyclization was achieved by irradiating a mixture of PIFA and KBr/KCl under a blue LED. The present protocol simply utilizes light as the safe and clean energy source and doesn't require any external photocatalyst providing various 3-halospiro[4,5]trienones in good to excellent yields (up to 93%).
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Affiliation(s)
- Tong Liu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P.R. China.
| | - Yaming Li
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P.R. China.
| | - Linlin Jiang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P.R. China.
| | - Jiaao Wang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P.R. China.
| | - Kun Jin
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P.R. China.
| | - Rong Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P.R. China.
| | - Chunying Duan
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, P.R. China.
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29
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30
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Boess E, Van Hoof M, Birdsall SL, Klussmann M. Investigating the Oxidation Step in the CuCl2-Catalyzed Aerobic Oxidative Coupling Reaction of N-Aryl Tetrahydroisoquinolines. J Org Chem 2019; 85:1972-1980. [DOI: 10.1021/acs.joc.9b02707] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Esther Boess
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Max Van Hoof
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Sarah Luna Birdsall
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Martin Klussmann
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
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31
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Abstract
AbstractWithin the last decade the combination of photoredox catalysis and other catalytic modes of activation has become a powerful tool for organic synthesis to enable transformations that are not possible using single catalyst systems and hence are complementary to traditional methodology. Especially reactions proceeding via synergistic catalysis where co-catalyst and photocatalyst simultaneously and separately activate different reaction partners greatly benefit from the special properties of molecules and transition metal complexes in their excited state being oxidizing and reducing in nature at the same time. Apart from allowing for the generation of radical (open-shell) reactive intermediates by SET under mild conditions from bench-stable, abundant precursors, the photocatalyst often acts to interweave the distinct catalytic cycles by interaction at multiple points of the reaction mechanism to provide overall redox-neutral processes by shuttling electrons within in this complex network of elementary reaction steps. Synergistic strategies moreover may allow to performing such reactions with enantioselectivity, while mostly the selectivity is achieved by the chiral co-catalyst. The merger of photocatalysis has been achieved with a broad range of alternative modes of catalysis including organocatalysis, Brønstedt and Lewis acid and base catalysis, enzyme catalysis as well as in the context of cross-coupling transition metal catalysis overcoming challenging steps in this methodology and therefore has contributed to considerably expand the repertoire of suitable coupling partners. While only selected examples will be discussed, this chapter will highlight various dual catalytic platforms focusing on the photocatalytically generated intermediates, but also illustrating the diverse roles of photocatalysts in the context of such synergistic multicatalysis reactions.
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Affiliation(s)
- Kirsten Zeitler
- Fakultät für Chemie und Mineralogie, Institut für Organische Chemie, Universität Leipzig, Johannisallee 29, D-04107, Leipzig04103, Germany
| | - Matthias Neumann
- Fakultät für Chemie und Pharmazie, Institut für Organische Chemie, Universität Regensburg, Regensburg, Bayern, Germany
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32
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Saha J, Das I. Solvent Dependent Divergent Reactivity of Electron‐Rich Dienones with and without Visible Light: Access to Cyclopropanated Furans and Butenolides. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901273] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jayanta Saha
- CSIR-Indian Institute of Chemical Biology and Academy of Scientific and Innovative Research (AcSIR) Organic and Medicinal Chemistry Division, 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India
| | - Indrajit Das
- CSIR-Indian Institute of Chemical Biology and Academy of Scientific and Innovative Research (AcSIR) Organic and Medicinal Chemistry Division, 4, Raja S. C. Mullick Road, Jadavpur Kolkata 700 032 India
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33
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Affiliation(s)
- Manjula D. Rathnayake
- Department of Chemistry, Oklahoma State University, 107, Physical Science, Stillwater, Oklahoma 74078, United States
| | - Jimmie D. Weaver
- Department of Chemistry, Oklahoma State University, 107, Physical Science, Stillwater, Oklahoma 74078, United States
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34
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Liu Q, Liu F, Yue H, Zhao X, Li J, Wei W. Photocatalyst‐Free Visible Light‐Induced Synthesis of β‐Oxo Sulfones via Oxysulfonylation of Alkenes with Arylazo Sulfones and Dioxygen in Air. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900984] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Qishun Liu
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong People's Republic of China
| | - Fei Liu
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong People's Republic of China
| | - Huilan Yue
- Qinghai Provincial Key Laboratory of Tibetan Medicine Research and Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau BiologyChinese Academy of Sciences Qinghai 810008 People's Republic of China
| | - Xiaohui Zhao
- Qinghai Provincial Key Laboratory of Tibetan Medicine Research and Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau BiologyChinese Academy of Sciences Qinghai 810008 People's Republic of China
| | - Jiangsheng Li
- School of Chemistry and food EngineeringChangsha University of Science and Technology Changsha 410114 People's Republic of China
| | - Wei Wei
- School of Chemistry and Chemical EngineeringQufu Normal University Qufu 273165, Shandong People's Republic of China
- Qinghai Provincial Key Laboratory of Tibetan Medicine Research and Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau BiologyChinese Academy of Sciences Qinghai 810008 People's Republic of China
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35
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Guo W, Zhao M, Du C, Zheng L, Li L, Chen L, Tao K, Tan W, Xie Z, Cai L, Fan X, Zhang K. Visible-Light-Catalyzed [3 + 1 + 2] Coupling Annulations for the Synthesis of Unsymmetrical Trisubstituted Amino-1,3,5-triazines. J Org Chem 2019; 84:15508-15519. [DOI: 10.1021/acs.joc.9b02514] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wei Guo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Mingming Zhao
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Chengtang Du
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Lvyin Zheng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Luo Li
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Liping Chen
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Kailiang Tao
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Wen Tan
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Zhen Xie
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Liuhuan Cai
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xiaolin Fan
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Kai Zhang
- School of Chemistry and Chemical Engineering, Hubei Key Laboratory for Processing and Application of Catalytic Materials, Huanggang Normal University, Huangzhou 438000, China
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36
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Le Vaillant F, Waser J. Alkynylation of radicals: spotlight on the "Third Way" to transfer triple bonds. Chem Sci 2019; 10:8909-8923. [PMID: 31762975 PMCID: PMC6855197 DOI: 10.1039/c9sc03033f] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 08/12/2019] [Indexed: 12/20/2022] Open
Abstract
The alkynylation of radical intermediates has been known since a long time, but had not been broadly applied in synthetic chemistry, in contrast to the alkynylation of either electrophiles or nucleophiles. In the last decade however, it has been intensively investigated leading to new disconnections to introduce versatile triple bonds into organic compounds. Nowadays, such processes are important alternatives to classical nucleophilic and electrophilic alkynylations. Efficient alkyne transfer reagents, in particular arylsulfones and hypervalent iodine reagents were introduced. Direct alkynylation, as well as cascade reactions, were subsequently developed. If relatively harsh conditions were required in the past, a new era began with progress in photoredox and transition metal catalysis. Starting from various radical precursors, alkynylations under very mild reaction conditions were rapidly discovered. This review covers the evolution of radical alkynylation, from its emergence to its current intensive stage of development. It will focus in particular on improvements for the generation of radicals and on the extension of the scope of radical precursors and alkyne sources.
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Affiliation(s)
- Franck Le Vaillant
- Laboratory of Catalysis and Organic Synthesis , Ecole Polytechnique Fédérale de Lausanne , EPFL SB ISIC LCSO , BCH 4306 , 1015 Lausanne , Switzerland .
| | - Jérôme Waser
- Laboratory of Catalysis and Organic Synthesis , Ecole Polytechnique Fédérale de Lausanne , EPFL SB ISIC LCSO , BCH 4306 , 1015 Lausanne , Switzerland .
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37
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Behbehani H, Ibrahim HM. Synthetic Strategy for Pyrazolo[1,5- a]pyridine and Pyrido[1,2- b]indazole Derivatives through AcOH and O 2-Promoted Cross-dehydrogenative Coupling Reactions between 1,3-Dicarbonyl Compounds and N-Amino-2-iminopyridines. ACS OMEGA 2019; 4:15289-15303. [PMID: 31552376 PMCID: PMC6751734 DOI: 10.1021/acsomega.9b02430] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 08/21/2019] [Indexed: 05/12/2023]
Abstract
An efficient method has been developed for the synthesis of uniquely substituted pyrazolo[1,5-a]pyridine and pyrido[1,2-b]indazole derivatives, which involves acetic acid and molecular oxygen promoted cross-dehydrogenative coupling reactions of respective β-ketoesters and β-diketones (like ethyl acetoacetate, ethyl benzoylacetate, methyl propionylacetate, acetylacetone, dimedone, 1,3-cyclohexanedione, and 1,3-cyclopentanedione) with N-amino-2-iminopyridines. The proposed tentative mechanism involves formal acetic acid-promoted oxidative C(sp3)-C(sp2) dehydrogenative coupling followed by dehydrative cyclization under a catalyst-free condition within high atom economy processes.
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Affiliation(s)
- Haider Behbehani
- Chemistry
Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
| | - Hamada Mohamed Ibrahim
- Chemistry
Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
- Chemistry
Department, Faculty of Science, Fayoum University, P.O. Box 63514, Fayoum, Egypt
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38
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Huang M, Dai J, Cheng X, Ding M. Electrochemical Approach for Direct C-H Phosphonylation of Unprotected Secondary Amine. Org Lett 2019; 21:7759-7762. [PMID: 31525939 DOI: 10.1021/acs.orglett.9b02707] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Direct α-phosphonylation of an unprotected secondary amine in a single step is of practical importance to amino phophophates. However, this protocol is limited due to the high redox barrier of unprotected amine. In this paper, we report C-H phosphonylation of an unprotected secondary amine via an electrochemical approach in the presence of catalytic carboxylate salt. This metal-free and exogenous oxidant-free method furnishes diverse target molecules with satisfactory yield under mild reaction conditions. Successful application of the protocol in a gram-scale experiment demonstrates the potential utility for further functionalization.
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39
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Jayaraj S, Badu-Tawiah AK. N-Substituted Auxiliaries for Aerobic Dehydrogenation of Tetrahydro-isoquinoline: A Theory-Guided Photo-Catalytic Design. Sci Rep 2019; 9:11280. [PMID: 31375731 PMCID: PMC6677888 DOI: 10.1038/s41598-019-47735-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 07/19/2019] [Indexed: 12/18/2022] Open
Abstract
Visible-light mediated aerobic dehydrogenation of N-heterocyclic compounds is a reaction with enormous potential for application. Herein, we report the first complete aerobic dehydrogenation pathway to large-scale production of isoquinolines. The discovery of this visible light photoredox reaction was enabled through the combination of mathematical simulations and real-time quantitative mass spectrometry screening. The theoretical calculations showed that hyper-conjugation, the main underlying factor hindering the aerobic oxidation of tetrahydroisoquinolines, is relieved both by π- and σ-donating substituents. This mechanistic insight provided a novel photocatalytic route based on N-substituted auxiliaries that facilitated the conversion of tetrahydroisoquinolines into the corresponding isoquinolines in just three simple steps (yield 71.7% in bulk-solution phase), using unmodified Ru(bpy)3Cl2 photocatalyst, sun energy, atmospheric O2, and at ambient temperature.
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Affiliation(s)
- Savithra Jayaraj
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43210, USA
| | - Abraham K Badu-Tawiah
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, 43210, USA.
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40
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Ibrahim HM, Behbehani H. Sustainable Synthetic Approach for (Pyrazol-4-ylidene)pyridines By Metal Catalyst-Free Aerobic C(sp 2)-C(sp 3) Coupling Reactions between 1-Amino-2-imino-pyridines and 1-Aryl-5-pyrazolones. ACS OMEGA 2019; 4:11701-11711. [PMID: 31460276 PMCID: PMC6682090 DOI: 10.1021/acsomega.9b01650] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 06/21/2019] [Indexed: 05/26/2023]
Abstract
A novel, metal catalyst-free, and efficient method has been developed for the synthesis of (pyrazol-4-ylidene)pyridine derivatives. The process involves dehydrogenative coupling of 1-amino-2-imino-pyridines with 1-aryl-5-pyrazolone derivatives utilizing O2 as the sole oxidant. The new method benefits from a high atom economy, efficiency, and substrate scope, as well as the simplicity of reaction and product purification procedures.
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Affiliation(s)
- Hamada Mohamed Ibrahim
- Chemistry
Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
- Chemistry
Department, Faculty of Science, Fayoum University, P.O. Box 63514, Fayoum, Egypt
| | - Haider Behbehani
- Chemistry
Department, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait
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41
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Xie W, Liu N, Gong B, Ning S, Che X, Cui L, Xiang J. Electrochemical Cross-Dehydrogenative Coupling of N
-Aryl-tetrahydroisoquinolines with Phosphites and Indole. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801883] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Wenxia Xie
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University; The School of Pharmaceutical Sciences; Jilin University; 1266 Fujin Road Changchun, Jilin 130021 P. R. China
| | - Nian Liu
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University; The School of Pharmaceutical Sciences; Jilin University; 1266 Fujin Road Changchun, Jilin 130021 P. R. China
| | - Bowen Gong
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University; The School of Pharmaceutical Sciences; Jilin University; 1266 Fujin Road Changchun, Jilin 130021 P. R. China
| | - Shulin Ning
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University; The School of Pharmaceutical Sciences; Jilin University; 1266 Fujin Road Changchun, Jilin 130021 P. R. China
| | - Xin Che
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University; The School of Pharmaceutical Sciences; Jilin University; 1266 Fujin Road Changchun, Jilin 130021 P. R. China
| | - Lili Cui
- Department of Chemistry and Chemical Engineering; Changchun University of Science and Technology; 7989 Weixing Road Changchun, Jilin 130022 P. R. China
| | - Jinbao Xiang
- The Center for Combinatorial Chemistry and Drug Discovery of Jilin University; The School of Pharmaceutical Sciences; Jilin University; 1266 Fujin Road Changchun, Jilin 130021 P. R. China
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42
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Liu J, Lan L, Gao Y, Liu Q, Cheng L, Wang D, Liu L. Visible‐Light‐Mediated Stereoselective 1,2‐Iodoalkylation of Alkynes. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jie‐Jie Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
| | - Ling Lan
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
| | - Yu‐Ting Gao
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
| | - Qi Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
| | - Liang Cheng
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
| | - Dong Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
| | - Li Liu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of ChemistryChinese Academy of Sciences Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
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43
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Naskar S, Roy Chowdhury S, Mondal S, Maiti DK, Mishra S, Das I. Visible-Light-Activated Divergent Reactivity of Dienones: Dimerization in Neat Conditions and Regioselective E to Z Isomerization in the Solvent. Org Lett 2019; 21:1578-1582. [DOI: 10.1021/acs.orglett.9b00083] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sandip Naskar
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Sabyasachi Roy Chowdhury
- Department of Chemistry, Indian Institute of Technology (IIT) Kharagpur, Kharagpur, West Bengal 721302, India
| | - Somrita Mondal
- Department of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
| | - Dilip K. Maiti
- Department of Chemistry, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India
| | - Sabyashachi Mishra
- Department of Chemistry, Indian Institute of Technology (IIT) Kharagpur, Kharagpur, West Bengal 721302, India
| | - Indrajit Das
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
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44
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Motaleb A, Bera A, Maity P. An organocatalyst bound α-aminoalkyl radical intermediate for controlled aerobic oxidation of iminium ions. Org Biomol Chem 2019; 16:5081-5085. [PMID: 29947387 DOI: 10.1039/c8ob01032c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A catalyst bound α-aminoalkyl radical intermediate from iminium is developed to control its formation and reactivity with aerobic oxygen. The influence of the catalyst was demonstrated via the ease of radical intermediate formation and its subsequent reactivity, including the first catalyst-controlled enantioselective aerobic oxidation with a chiral phosphite catalyst.
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Affiliation(s)
- Abdul Motaleb
- Organic Chemistry Division, CSIR-National Chemical Laboratory, Pune-411008, India.
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45
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Alkene Carboarylation through Catalyst‐Free, Visible Light‐Mediated Smiles Rearrangement. Chemistry 2019; 25:1927-1930. [DOI: 10.1002/chem.201805712] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/04/2018] [Indexed: 11/07/2022]
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46
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Uygur M, Danelzik T, García Mancheño O. Metal-free desilylative C–C bond formation by visible-light photoredox catalysis. Chem Commun (Camb) 2019; 55:2980-2983. [DOI: 10.1039/c8cc10239b] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A novel metal-free desilylative C–C bond formation from simple organosilanes by visible-light acridinium photoredox catalysis is presented.
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Affiliation(s)
- Mustafa Uygur
- Münster University
- Organic Chemistry Institute
- 48149 Münster
- Germany
| | - Tobias Danelzik
- Münster University
- Organic Chemistry Institute
- 48149 Münster
- Germany
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47
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Kong Y, Xu W, Ye F, Weng J. Recent Advances in Visible-Light-Induced Cross Dehydrogenation Coupling Reaction under Transition Metal-Free Conditions. CHINESE J ORG CHEM 2019. [DOI: 10.6023/cjoc201905016] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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48
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Quint V, Chouchène N, Askri M, Lalevée J, Gaumont AC, Lakhdar S. Visible-light-mediated α-phosphorylation of N-aryl tertiary amines through the formation of electron-donor–acceptor complexes: synthetic and mechanistic studies. Org Chem Front 2019. [DOI: 10.1039/c8qo00985f] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible light-mediated photocatalyst-free approach for the oxidative α-CH functionalization of N-aryl tertiary amines with secondary phosphine oxides has been developed.
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Affiliation(s)
| | - Nourhène Chouchène
- Université de Monastir
- Faculté des Sciences de Monastir
- Monastir 5000
- Tunisia
| | - Moheddine Askri
- Université de Monastir
- Faculté des Sciences de Monastir
- Monastir 5000
- Tunisia
| | - Jacques Lalevée
- Institut de Science des Matériaux de Mulhouse IS2 M – UMR CNRS 7361 – UHA
- 68057 Mulhouse Cedex
- France
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49
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Otake Y, Williams JD, Rincón JA, de Frutos O, Mateos C, Kappe CO. Photochemical benzylic bromination in continuous flow using BrCCl3 and its application to telescoped p-methoxybenzyl protection. Org Biomol Chem 2019; 17:1384-1388. [DOI: 10.1039/c9ob00044e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Photochemical benzylic bromination in flow using BrCCl3, which is compatible with electron-rich aromatics, allowing in situ p-methoxybenzyl bromide formation and PMB-protection.
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Affiliation(s)
- Yuma Otake
- Institute of Chemistry
- University of Graz
- NAWI Graz
- 8010 Graz
- Austria
| | | | - Juan A. Rincón
- Centro de Investigación Lilly S.A
- 28108 Alcobendas-Madrid
- Spain
| | - Oscar de Frutos
- Centro de Investigación Lilly S.A
- 28108 Alcobendas-Madrid
- Spain
| | - Carlos Mateos
- Centro de Investigación Lilly S.A
- 28108 Alcobendas-Madrid
- Spain
| | - C. Oliver Kappe
- Institute of Chemistry
- University of Graz
- NAWI Graz
- 8010 Graz
- Austria
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50
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Ide T, Barham JP, Fujita M, Kawato Y, Egami H, Hamashima Y. Regio- and chemoselective Csp 3-H arylation of benzylamines by single electron transfer/hydrogen atom transfer synergistic catalysis. Chem Sci 2018; 9:8453-8460. [PMID: 30542595 PMCID: PMC6244453 DOI: 10.1039/c8sc02965b] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 09/10/2018] [Indexed: 12/13/2022] Open
Abstract
We present a highly regio- and chemoselective Csp3-H arylation of benzylamines mediated by synergy of single electron transfer (SET) and hydrogen atom transfer (HAT) catalysis. Under well precedented SET catalysis alone, the arylation reaction of N,N-dimethylbenzylamine proceeded via aminium radical cation formation and selectively targeted the N-methyl group. In contrast, addition of PhC(O)SH as a HAT catalyst precursor completely switched the regioselectivity to Csp3-H arylation at the N-benzylic position. Measurement of oxidation potentials indicated that the conjugate base of PhC(O)SH is oxidized in preference to the substrate amine. The discovery of the thiocarboxylate as a novel HAT catalyst allowed for the selective generation of the sulfur-centered radical, so that the N-benzyl selectivity was achieved by overriding the inherent N-methyl and/or N-methylene selectivity under SET catalysis conditions. While visible light-driven α-C-H functionalization of amines has mostly been demonstrated with aniline derivatives and tetrahydroisoquinolines (THIQs), our method is applicable to a variety of primary, secondary and tertiary benzylamines for efficient N-benzylic C-H arylation. Functional group tolerance was high, and various 1,1-diarylmethylamines, including an α,α,α-trisubstituted amine, were obtained in good to excellent yield (up to 98%). Importantly, the reaction is applicable to late-stage functionalization of pharmaceuticals.
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Affiliation(s)
- Takafumi Ide
- School of Pharmaceutical Sciences , University of Shizuoka , 52-1 Yada, Suruga-ku , Shizuoka 422-8526 , Japan .
| | - Joshua P Barham
- School of Pharmaceutical Sciences , University of Shizuoka , 52-1 Yada, Suruga-ku , Shizuoka 422-8526 , Japan .
| | - Masashi Fujita
- School of Pharmaceutical Sciences , University of Shizuoka , 52-1 Yada, Suruga-ku , Shizuoka 422-8526 , Japan .
| | - Yuji Kawato
- School of Pharmaceutical Sciences , University of Shizuoka , 52-1 Yada, Suruga-ku , Shizuoka 422-8526 , Japan .
| | - Hiromichi Egami
- School of Pharmaceutical Sciences , University of Shizuoka , 52-1 Yada, Suruga-ku , Shizuoka 422-8526 , Japan .
| | - Yoshitaka Hamashima
- School of Pharmaceutical Sciences , University of Shizuoka , 52-1 Yada, Suruga-ku , Shizuoka 422-8526 , Japan .
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