1
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Nugent J, López-Francés A, Sterling AJ, Tay MY, Frank N, Mousseau JJ, Duarte F, Anderson EA. α-Amino bicycloalkylation through organophotoredox catalysis. Chem Sci 2024; 15:10918-10925. [PMID: 39027309 PMCID: PMC11253163 DOI: 10.1039/d4sc01368a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 05/29/2024] [Indexed: 07/20/2024] Open
Abstract
Bridged bicycloalkanes such as bicyclo[1.1.1]pentanes (BCPs) and bicyclo[3.1.1]heptanes (BCHeps) are important motifs in contemporary drug design due to their potential to act as bioisosteres of disubstituted benzene rings, often resulting in compounds with improved physicochemical and pharmacokinetic properties. Access to such motifs with proximal nitrogen atoms (i.e. α-amino/amido bicycloalkanes) is highly desirable for drug discovery applications, but their synthesis is challenging. Here we report an approach to α-amino BCPs and BCHeps through the visible-light enabled addition of α-amino radicals to the interbridgehead C-C bonds of [1.1.1] and [3.1.1]propellane respectively. The reaction proceeds under exceptionally mild conditions and displays broad substrate scope, providing access to an array of medicinally-relevant BCP and BCHep products. Experimental and computational mechanistic studies provide evidence for a radical chain pathway which depends critically on the stability of the α-amino radical, as well as effective catalyst turnover.
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Affiliation(s)
- Jeremy Nugent
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
| | - Adrián López-Francés
- Department of Organic Chemistry I, Faculty of Pharmacy and Lascaray Research Center, University of the Basque Country, UPV/EHU Paseo de la Universidad 7 01006 Vitoria-Gasteiz Spain
| | - Alistair J Sterling
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
| | - Min Yi Tay
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
| | - Nils Frank
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
| | - James J Mousseau
- Pfizer Worldwide Research and Development Eastern Point Road, Groton Connecticut 06340 USA
| | - Fernanda Duarte
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
| | - Edward A Anderson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
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2
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Zhou Y, Wang Y, Xu P, Han W, Xiong HY, Zhang G. Synthesis of Indolyl Phenyl Diketones through Visible-Light-Promoted Ni-Catalyzed Intramolecular Cyclization/Oxidation Sequence of Ynones. ACS ORGANIC & INORGANIC AU 2024; 4:241-247. [PMID: 38585509 PMCID: PMC10995934 DOI: 10.1021/acsorginorgau.3c00060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 04/09/2024]
Abstract
The combination of visible light catalysis and Ni catalysis has enabled the synthesis of indolyl phenyl diketones through the cyclization/oxidation process of ynones. This reaction proceeded under mild and base-free conditions and showed a broad scope and feasibility for gram-scale synthesis. Several natural products and biologically interesting molecules could be readily postfunctionalized by this method.
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Affiliation(s)
- Yufeng Zhou
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Yaping Wang
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Peidong Xu
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Weiwei Han
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Heng-Ying Xiong
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Guangwu Zhang
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
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3
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Zadehnazari A, Khosropour A, Altaf AA, Rosen AS, Abbaspourrad A. Tetrazine-Linked Covalent Organic Frameworks With Acid Sensing and Photocatalytic Activity. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2311042. [PMID: 38140890 DOI: 10.1002/adma.202311042] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 11/29/2023] [Indexed: 12/24/2023]
Abstract
The first synthesis and comprehensive characterization of two vinyl tetrazine-linked covalent organic frameworks (COF), TA-COF-1 and TA-COF-2, are reported. These materials exhibit high crystallinity and high specific surface areas of 1323 and 1114 m2 g-1. The COFs demonstrate favorable band positions and narrow band gaps suitable for light-driven applications. These advantages enable TA-COFs to act as reusable metal-free photocatalysts in the arylboronic acids oxidation and light-induced coupling of benzylamines. In addition, these TA-COFs show acid sensing capabilities, exhibiting visible and reversible color changes upon exposure to HCl solution, HCl vapor, and NH3 vapor. Further, the TA-COFs outperform a wide range of previously reported COF photocathodes. The tetrazine linker in the COF skeleton represents a significant advancement in the field of COF synthesis, enhancing the separation efficiency of charge carriers during the photoreaction and contributing to their photocathodic properties. TA-COFs can also degrade 5-nitro-1,2,4-triazol-3-one (NTO), an insensitive explosive present in industrial wastewater, in 20 min in a sunlight-driven photocatalytic process; thus, revealing dual functionality of the protonated TA-COFs as both photodegradation and Brønsted acid catalysts. This pioneering work opens new avenues for harnessing the potential of the tetrazine linker in COF-based materials, facilitating advances in catalysis, sensing, and other related fields.
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Affiliation(s)
- Amin Zadehnazari
- Department of Food Science, College of Agricultural and Life Sciences, Cornell University, Stocking Hall, Ithaca, NY, 14853, USA
| | - Ahmadreza Khosropour
- Department of Food Science, College of Agricultural and Life Sciences, Cornell University, Stocking Hall, Ithaca, NY, 14853, USA
| | - Ataf Ali Altaf
- Department of Food Science, College of Agricultural and Life Sciences, Cornell University, Stocking Hall, Ithaca, NY, 14853, USA
| | - Andrew S Rosen
- Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA, 94720, USA
- Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Alireza Abbaspourrad
- Department of Food Science, College of Agricultural and Life Sciences, Cornell University, Stocking Hall, Ithaca, NY, 14853, USA
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4
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Makihara Y, Maeda B, Akiyoshi R, Tanaka D, Murakami K. Functionalized Polyamine Synthesis with Photoredox Catalysis. Chemistry 2024; 30:e202304374. [PMID: 38267374 DOI: 10.1002/chem.202304374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 01/24/2024] [Accepted: 01/24/2024] [Indexed: 01/26/2024]
Abstract
Polyamines, such as putrescine and spermidine, are pivotal in various biological processes across living organisms. Despite their significance, structurally modified polyamines offer a less-explored avenue for discovering bioactive compounds. The limitation is attributed to the synthetic difficulty of accessing functionalized polyamines. In this study, we accomplished photoredox-catalyzed functionalization of polyamines to diversify their structure. The rapid functionalization allows attaching fluorophores to the target polyamine, facilitating the development of molecular probes for advancing chemical biology studies.
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Affiliation(s)
- Yuta Makihara
- Department of Chemistry, School of Science, Kwansei Gakuin University, Gakuen Uegahara 1, Sanda, Hyogo, 669-1330, Japan
| | - Bumpei Maeda
- Department of Chemistry, School of Science, Kwansei Gakuin University, Gakuen Uegahara 1, Sanda, Hyogo, 669-1330, Japan
| | - Ryohei Akiyoshi
- Department of Chemistry, School of Science, Kwansei Gakuin University, Gakuen Uegahara 1, Sanda, Hyogo, 669-1330, Japan
| | - Daisuke Tanaka
- Department of Chemistry, School of Science, Kwansei Gakuin University, Gakuen Uegahara 1, Sanda, Hyogo, 669-1330, Japan
| | - Kei Murakami
- Department of Chemistry, School of Science, Kwansei Gakuin University, Gakuen Uegahara 1, Sanda, Hyogo, 669-1330, Japan
- JST-PRESTO, 7 Gobancho, Chiyoda, Tokyo, 102-0076, Japan
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5
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Hu X, Szczepaniak G, Lewandowska-Andralojc A, Jeong J, Li B, Murata H, Yin R, Jazani AM, Das SR, Matyjaszewski K. Red-Light-Driven Atom Transfer Radical Polymerization for High-Throughput Polymer Synthesis in Open Air. J Am Chem Soc 2023; 145:24315-24327. [PMID: 37878520 PMCID: PMC10636753 DOI: 10.1021/jacs.3c09181] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/08/2023] [Accepted: 10/09/2023] [Indexed: 10/27/2023]
Abstract
Photoinduced reversible-deactivation radical polymerization (photo-RDRP) techniques offer exceptional control over polymerization, providing access to well-defined polymers and hybrid materials with complex architectures. However, most photo-RDRP methods rely on UV/visible light or photoredox catalysts (PCs), which require complex multistep synthesis. Herein, we present the first example of fully oxygen-tolerant red/NIR-light-mediated photoinduced atom transfer radical polymerization (photo-ATRP) in a high-throughput manner under biologically relevant conditions. The method uses commercially available methylene blue (MB+) as the PC and [X-CuII/TPMA]+ (TPMA = tris(2-pyridylmethyl)amine) complex as the deactivator. The mechanistic study revealed that MB+ undergoes a reductive quenching cycle in the presence of the TPMA ligand used in excess. The formed semireduced MB (MB•) sustains polymerization by regenerating the [CuI/TPMA]+ activator and together with [X-CuII/TPMA]+ provides control over the polymerization. This dual catalytic system exhibited excellent oxygen tolerance, enabling polymerizations with high monomer conversions (>90%) in less than 60 min at low volumes (50-250 μL) and high-throughput synthesis of a library of well-defined polymers and DNA-polymer bioconjugates with narrow molecular weight distributions (Đ < 1.30) in an open-air 96-well plate. In addition, the broad absorption spectrum of MB+ allowed ATRP to be triggered under UV to NIR irradiation (395-730 nm). This opens avenues for the integration of orthogonal photoinduced reactions. Finally, the MB+/Cu catalysis showed good biocompatibility during polymerization in the presence of cells, which expands the potential applications of this method.
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Affiliation(s)
- Xiaolei Hu
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Grzegorz Szczepaniak
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Anna Lewandowska-Andralojc
- Faculty
of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznanskiego 8, 61-614 Poznan, Poland
- Center
for Advanced Technology, Adam Mickiewicz
University, Uniwersytetu
Poznanskiego 10, 61-614 Poznan, Poland
| | - Jaepil Jeong
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center
for Nucleic Acids Science & Technology, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Bingda Li
- Department
of Biomedical Engineering, Carnegie Mellon
University, Pittsburgh, Pennsylvania 15213, United States
| | - Hironobu Murata
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Rongguan Yin
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Arman Moini Jazani
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Subha R. Das
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
- Center
for Nucleic Acids Science & Technology, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department
of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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6
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Wang W, Yan X, Ye F, Zheng S, Huang G, Yuan W. Nickel/Photoredox Dual-Catalyzed Regiodivergent Aminoalkylation of Unactivated Alkyl Halides. J Am Chem Soc 2023; 145:23385-23394. [PMID: 37824756 DOI: 10.1021/jacs.3c09705] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
A mild and regiodivergent aminoalkylation of unactivated alkyl halides is disclosed via a dual photoredox/nickel catalysis. Bipyridyl-type ligands without an ortho-substituent control the site-selective coupling at the original position, while ortho-disubstituted ligands tune the site-selectivity at a remote, unprefunctionalized position. Mechanistic studies combined with DFT calculations give insight into the mechanism and the origins of the ligand-controlled regioselectivity. Notably, this redox-neutral, regiodivergent alkyl-alkyl coupling features mild conditions, broad substrate scope for both alkyl coupling partners, and excellent site-selectivity and offers a straightforward way for α-alkylation of tertiary amines to synthesize structurally diverse alkylamines and value-added amino acid derivatives.
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Affiliation(s)
- Wenlong Wang
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Xueyuan Yan
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, People's Republic of China
| | - Fu Ye
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Songlin Zheng
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
| | - Genping Huang
- Department of Chemistry, School of Science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, People's Republic of China
| | - Weiming Yuan
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), 1037 Luoyu Road, Wuhan 430074, People's Republic of China
- Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen 518000, People's Republic of China
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7
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Filipović A, Džambaski Z, Bondžić AM, Bondžić BP. Visible-light promoted photoredox catalysis in flow: addition of biologically important α‑amino radicals to michael acceptors. Photochem Photobiol Sci 2023; 22:2259-2270. [PMID: 37340217 DOI: 10.1007/s43630-023-00448-8] [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: 05/22/2023] [Accepted: 06/08/2023] [Indexed: 06/22/2023]
Abstract
Visible light promoted photoredox catalyzed formation of α-amino radicals from cyclic tertiary amine compounds and their subsequent addition to Michael acceptors performed in flow conditions allowed access to a wide range of functionalized N-aryl-substituted tetrahydroisoquinolines (THIQs) and N-aryl-substituted tetrahydro-β-carbolines (THBCs). Visible light in conjunction with Ru(bpy)3Cl2 photocatalyst allowed the formation and high reactivities of α-amino radicals in flow conditions at room temperature. These reactions gave valuable products with high efficiencies; some previously unavailable reaction pathways photo or thermal reaction conditions; i.e. direct synthesis of 1-substituted (THBCs) via α-amino radical path were successfully realized in flow. The use of custom-made FEP tube microreactor proved to be the key to succesfull α-amino-radical formation and overall reaction performance in flow. Three types of light transparent custom-made microfluidic devices were tested, among them glass/silicon and FEP type reactor showed very good results in the conversion of tested compounds. Plausible reaction mechanism is proposed in accordance with known principles of photo activation of tertiary amines. Visible light promoted C(sp3)-H functionalization of N-aryl-protected tetrahydroisoquinolines and N-aryl-protected tetrahydro-β-carbolines in microflow conditions via a-amino radical pathway with various coupling partners in excellent yields and efficiencies.
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Affiliation(s)
- Ana Filipović
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, National Institute of the Republic of Serbia, Njegoševa 12, 11000, Belgrade, Republic of Serbia
| | - Zdravko Džambaski
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, National Institute of the Republic of Serbia, Njegoševa 12, 11000, Belgrade, Republic of Serbia
| | - Aleksandra M Bondžić
- Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11000, Belgrade, Serbia
| | - Bojan P Bondžić
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, National Institute of the Republic of Serbia, Njegoševa 12, 11000, Belgrade, Republic of Serbia.
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8
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Singh T, Upreti GC, Arora S, Chauhan H, Singh A. Visible-light mediated, oxygen-promoted regioselective cross-dehydrogenative coupling of coumarins and dimethylanilines. Org Biomol Chem 2023; 21:6671-6674. [PMID: 37540040 DOI: 10.1039/d3ob00923h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Herein, we report a regioselective, photocatalytic C3 α-aminoalkylation of coumarins via a cross-dehydrogenative coupling of dimethylanilines and coumarins. Molecular oxygen was utilized as the oxidizing agent in this transformation, which exhibits a wide substrate scope and affords the products in good yields. It was established that 4-amino-substituted coumarin reacts via a different mechanism compared to coumarin derivatives that are unsubstituted at the 4-position.
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Affiliation(s)
- Tavinder Singh
- Department of Chemistry, Indian Institute of technology Kanpur, Kanpur-208016, Uttar Pradesh, India.
| | - Ganesh Chandra Upreti
- Department of Chemistry, Indian Institute of technology Kanpur, Kanpur-208016, Uttar Pradesh, India.
| | - Shivani Arora
- Department of Chemistry, Indian Institute of technology Kanpur, Kanpur-208016, Uttar Pradesh, India.
| | - Himanshu Chauhan
- Department of Chemistry, Indian Institute of technology Kanpur, Kanpur-208016, Uttar Pradesh, India.
| | - Anand Singh
- Department of Chemistry, Indian Institute of technology Kanpur, Kanpur-208016, Uttar Pradesh, India.
- Department of Sustainable Energy Engineering, Indian Institute of Technology Kanpur, Kanpur-208016, Uttar Pradesh, India
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9
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Govada GV, Rajasekhara Reddy S. Synthesis and in Silico Study of Novel Benzisoxazole-Chromene Derivatives as Potent Inhibitors of Acetylcholinesterase: Metal-Free Site-Selective C-N Bond Formation via Aza-Michael Reaction. Chem Biodivers 2023; 20:e202300573. [PMID: 37415329 DOI: 10.1002/cbdv.202300573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/08/2023]
Abstract
An efficient metal-free approach for site selective C-N coupling reaction of benzo[d]isoxazole and 2H-chromene derivatives has been designed and developed against AchE. This nitrogen containing organo-base promoted methodology, which is both practical and environmentally friendly, provides an easy and suitable pathway for synthesizing Benzisoxazole-Chromene (BC) possessing poly heteroaryl moieties. The synthesized BC derivatives 4 a-n was docked into the active sites of AChE to obtain more perception into the binding modes of the compounds. Out of them, compound 4 a and 4 l displayed potent activity and high selectivity against the AChE inhibition. Final docking results indicates that compound 4 l showed the lowest binding energy of -11.2260 kcal/mol with AChE. The synthesized BC analogs would be potential candidates for promoting suitable studies in medicinal chemistry research.
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Affiliation(s)
- Grace Victoria Govada
- Advanced Catalysis laboratory, Vellore Institute of Technology (VIT), 632014, Vellore, India
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10
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Lv S, Li Q, Sang JW, Zhang Y, Wang J, Zhang WD. Uranyl nitrate as a recyclable homogeneous photocatalyst for selective cross-coupling of N-substituted amines and indoles. RSC Adv 2023; 13:11929-11937. [PMID: 37077263 PMCID: PMC10108382 DOI: 10.1039/d3ra01037f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 04/05/2023] [Indexed: 04/21/2023] Open
Abstract
A homogeneous photocatalytic recyclable system for the selective radical-radical cross-coupling of N-substituted amines and indoles has been established. This system could conduct in water or acetonitrile, featuring the reuse of uranyl nitrate as the recyclable photocatalyst via a simple extraction. With this mild strategy in hand, good to excellent yields of cross-coupling products could be achieved even under the irradiation of sunlight, including 26 natural product derivatives and 16 natural product inspired re-engineered compounds. A radical-radical cross-coupling mechanism was newly proposed based on experimental evidence and reported literature. This strategy has been also applied to a gram scale synthesis to demonstrate its practical utility.
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Affiliation(s)
- Shuaipeng Lv
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine No. 1200, Cailun Road Shanghai 201203 China
- School of Pharmacy, Second Military Medical University Shanghai 200433 China
| | - Qiannan Li
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine No. 1200, Cailun Road Shanghai 201203 China
- School of Pharmacy, Second Military Medical University Shanghai 200433 China
| | - Ji-Wei Sang
- School of Pharmacy, Second Military Medical University Shanghai 200433 China
| | - Yu Zhang
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine No. 1200, Cailun Road Shanghai 201203 China
| | - Jinxin Wang
- School of Pharmacy, Second Military Medical University Shanghai 200433 China
| | - Wei-Dong Zhang
- Shanghai Frontiers Science Center for Chinese Medicine Chemical Biology, Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine No. 1200, Cailun Road Shanghai 201203 China
- School of Pharmacy, Second Military Medical University Shanghai 200433 China
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11
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Visible Light Induced C-H/N-H and C-X Bonds Reactions. REACTIONS 2023. [DOI: 10.3390/reactions4010012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
Abstract
Herein, we report efficient visible light-induced photoredox reactions of C–H/N–H and C–X Bonds. These methods have provided access to varied portfolio of synthetically important γ-ketoesters, azaspirocyclic cyclohexadienones spirocyclohexadienones, multisubstituted benzimidazole derivatives, substituted N,2-diarylacetamide, 2-arylpyridines and 2-arylquinolines in good yields and under mild conditions. Moreover, we have successfully discussed the construction through visible light-induction by an intermolecular radical addition, dearomative cyclization, aryl migration and desulfonylation. Similarly, we also spotlight the visible light-catalyzed aerobic C–N bond activation from well-known building blocks through cyclization, elimination and aromatization. The potential use of a wide portfolio of simple ketones and available primary amines has made this transformation very attractive.
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12
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Zeng FL, Zhu HL, Wang RN, Yuan XY, Sun K, Qu LB, Chen XL, Yu B. Bismuth vanadate: A versatile heterogeneous catalyst for photocatalytic functionalization of C(sp2)–H bonds. CHINESE JOURNAL OF CATALYSIS 2023. [DOI: 10.1016/s1872-2067(23)64391-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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13
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Cole KP, Douglas JJ, Hammerstad T, Stephenson CRJ. Visible-Light Photocatalysis Academic–Industrial Collaboration Retrospective: Shared Learning and Impact Analysis. Org Process Res Dev 2023. [DOI: 10.1021/acs.oprd.2c00358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- Kevin P. Cole
- Synthetic Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285, United States
| | - James J. Douglas
- Synthetic Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285, United States
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Travis Hammerstad
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Corey R. J. Stephenson
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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14
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Long CJ, Pu HP, Zhao YN, He YH, Guan Z. Cooperative photocatalysis and l-/ d-proline catalysis enables enantioselective oxidative cross-dehydrogenative coupling of acyclic benzylic secondary amines with ketones. Org Chem Front 2023. [DOI: 10.1039/d2qo01956f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
We developed an enantioselective cross-dehydrogenative coupling of acyclic benzylic secondary amines with ketones by combining photocatalysis and l-/d-proline catalysis.
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15
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Yu WQ, Xiong BQ, Zhong LJ, Liu Y. Visible-light-promoted radical cascade alkylation/cyclization: access to alkylated indolo/benzoimidazo[2,1- a]isoquinolin-6(5 H)-ones. Org Biomol Chem 2022; 20:9659-9671. [PMID: 36416184 DOI: 10.1039/d2ob01732f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A new protocol is herein described for the direct generation of alkylated indolo/benzoimidazo[2,1-a]isoquinolin-6(5H)-one derivatives by using Hantzsch esters as alkylation radical precursors using a photoredox/K2S2O8 system. This oxidative alkylation of active alkenes involves a radical cascade cyclization process and a sequence of Hantzsch ester single electron oxidation, C-C bond cleavage, alkylation, arylation and oxidative deprotonation.
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Affiliation(s)
- Wen-Qin Yu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Bi-Quan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Long-Jin Zhong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China.
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16
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Bjerg EE, Marchán-García J, Buxaderas E, Moglie Y, Radivoy G. Oxidative α-Functionalization of 1,2,3,4-Tetrahydroisoquinolines Catalyzed by a Magnetically Recoverable Copper Nanocatalyst. Application in the Aza-Henry Reaction and the Synthesis of 3,4-Dihydroisoquinolones. J Org Chem 2022; 87:13480-13493. [PMID: 36154121 DOI: 10.1021/acs.joc.2c01782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The oxidative α-functionalization of 2-aryl-1,2,3,4-tetrahydroisoquinolines (THIQs) promoted by a versatile heterogeneous nanocatalyst consisting of copper nanoparticles immobilized on silica-coated maghemite (CuNPs/MagSilica) has been accomplished. The methodology was successfully applied in the cross-dehydrogenative coupling (CDC) reaction of N-aryl THIQs and other tertiary amines with nitromethane as a pro-nucleophile (aza-Henry reaction) and the α-oxidation of THIQs with O2 as a green oxidant. Phosphite, alkyne, or indole derivatives were also shown to be suitable candidates for their use as pro-nucleophiles in the CDC reaction with THIQs. The catalyst, with very low copper loading (0.4-1.0 mol % Cu), could be easily recovered by means of an external magnet and reused in four cycles without significant loss of activity.
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Affiliation(s)
- Esteban E Bjerg
- Instituto de Química del Sur, INQUISUR (CONICET-UNS), Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, 8000 Bahía Blanca, Argentina
| | - Joaquín Marchán-García
- Instituto de Química del Sur, INQUISUR (CONICET-UNS), Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, 8000 Bahía Blanca, Argentina
| | - Eduardo Buxaderas
- Instituto de Química del Sur, INQUISUR (CONICET-UNS), Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, 8000 Bahía Blanca, Argentina
| | - Yanina Moglie
- Instituto de Química del Sur, INQUISUR (CONICET-UNS), Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, 8000 Bahía Blanca, Argentina
| | - Gabriel Radivoy
- Instituto de Química del Sur, INQUISUR (CONICET-UNS), Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, 8000 Bahía Blanca, Argentina
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17
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Elavarasan S, Preety J, Abinaya R, Saravanan T, Balasunramaniam KK, Venkatramaiah N, Baskar B. Visible Light Driven Metal-Free Photoredox Catalyzed α-benzylation and α-oxygenation of N-substituted tetrahydroisoquinolines: Applications to Synthesis of Natural Products. Chem Asian J 2022; 17:e202200878. [PMID: 36073541 DOI: 10.1002/asia.202200878] [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: 08/25/2022] [Revised: 09/06/2022] [Indexed: 11/07/2022]
Abstract
Herein, visible light mediated organophoto redox catalysed simple and convenient method for the a-benzylation and a-oxygenation of tertiary amines is demonstrated. Synthesis of novel thiophenol based donor acceptor organophotoredox catalysts 4a - 4d were investigated along with commercial catalyst 4-CzIPN ( 4e ). A diverse biologically active a-benzylated tetrahydroisoquinolines and natural products such as (±)-Norlaudanosine, (±)-laudanosine and (±)-xylopinine have been synthesized under the optimized conditions in yields ranging from from 62-91%. Exploitation of synthesized a-benzylated compound using present phtoredox catalyzed conditions gave rise to dehydyrogenative benzylic oxidation product under oxygen atmosphere which is known to display biologically and structurally important properties. Also, various N-protected tertiary amines were found to be suitable for the a-oxygenation reactions using catalyst 4e and resulted in good yields (61-85%).
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Affiliation(s)
- S Elavarasan
- SRM Institute of Science and Technology, Chemistry, INDIA
| | - J Preety
- SRM Institute of Science and Technology, Chemistry, INDIA
| | - R Abinaya
- SRM Institute of Science and Technology, Chemistry, INDIA
| | - T Saravanan
- University of Hyderabad, School of Chemistry, INDIA
| | | | | | - Baburaj Baskar
- SRM University, Chemistry, Kattankulathur, 603203, India, 603203, Chennai, INDIA
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18
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Mandal D, Roychowdhury S, Biswas JP, Maiti S, Maiti D. Transition-metal-catalyzed C-H bond alkylation using olefins: recent advances and mechanistic aspects. Chem Soc Rev 2022; 51:7358-7426. [PMID: 35912472 DOI: 10.1039/d1cs00923k] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal catalysis has contributed immensely to C-C bond formation reactions over the last few decades, and alkylation is no exception. The superiority of such methodologies over traditional alkylation is evident from minimal reaction steps, shorter reaction times, and atom economy while also allowing control over regio- and stereo-selectivity. In particular, hydrocarbonation of alkenes has grabbed increased attention due its fundamental ability to effectively and selectively synthesise a wide range of industrially and pharmaceutically relevant moieties. This review attempts to provide a scientific viewpoint and a systematic analysis of the recent developments in transition-metal-catalyzed alkylation of various C-H bonds using simple and activated olefins. The key features and mechanistic studies involved in these transformations are described briefly.
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Affiliation(s)
- Debasish Mandal
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066, India
| | - Sumali Roychowdhury
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Jyoti Prasad Biswas
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India.
| | - Siddhartha Maiti
- School of Bioengineering, Vellore Institute of Technology, Bhopal University, Bhopal-Indore Highway, Kothrikalan, Sehore, Madhya Pradesh-466114, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India. .,Department of Interdisciplinary Program in Climate Studies, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India
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19
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Singh T, Panday P, Upreti GC, Ranjan S, Gupta RK, Singh A. Visible-light-mediated synthesis of α,β-diamino esters via coupling of N, N-dimethylanilines and glyoxalic oxime ethers. Org Biomol Chem 2022; 20:4522-4525. [PMID: 35605977 DOI: 10.1039/d2ob00361a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible-light-mediated synthesis of α,β-diamino esters has been developed via the cross coupling of N,N-dimethylanilines with glyoxalic oxime ethers. This protocol involves the generation of α-aminoalkyl radicals under mild reaction conditions, provides α,β-diamino esters in good to excellent yields, and can be performed on a gram-scale.
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Affiliation(s)
- Tavinder Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
| | - Prabhakar Panday
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
| | - Ganesh Chandra Upreti
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
| | - Sudhir Ranjan
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India
| | - Raju Kumar Gupta
- Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India
| | - Anand Singh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, U. P., 208016, India.
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20
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Guo F, Wang H, Ye X, Tan CH. Advanced Synthesis Using Photocatalysis Involved Dual Catalytic System. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Fenfen Guo
- Zhejiang University of Technology College of Pharmaceutical Science CHINA
| | - Hong Wang
- Zhejiang University of Technology College of Pharmaceutical Science CHINA
| | - Xinyi Ye
- Zhejiang University of Technology College of Pharmaceutical Science 18 Chaowang Road 310014 Hangzhou CHINA
| | - Choon-Hong Tan
- Nanyang Technological University School of Physical and Mathematical Sciences SINGAPORE
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21
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Peng X, Xu K, Zhang Q, Liu L, Tan J. Dehydroalanine modification sees the light: a photochemical conjugate addition strategy. TRENDS IN CHEMISTRY 2022. [DOI: 10.1016/j.trechm.2022.04.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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22
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Tropane and related alkaloid skeletons via a radical [3+3]-annulation process. Commun Chem 2022; 5:57. [PMID: 36697883 PMCID: PMC9814087 DOI: 10.1038/s42004-022-00671-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 03/25/2022] [Indexed: 01/28/2023] Open
Abstract
Tropanes and related bicyclic alkaloids are highly attractive compounds possessing a broad biological activity. Here we report a mild and simple protocol for the synthesis of N-arylated 8-azabicyclo[3.2.1]octane and 9-azabicyclo[3.3.1]nonane derivatives. It provides these valuable bicyclic alkaloid skeletons in good yields and high levels of diastereoselectivity from simple and readily available starting materials using visible-light photoredox catalysis. These bicyclic aniline derivatives are hardly accessible via the classical Robinson tropane synthesis and represent a particularly attractive scaffold for medicinal chemistry. This unprecedented annulation process takes advantage of the unique reactivity of ethyl 2-(acetoxymethyl)acrylate as a 1,3-bis radical acceptor and of cyclic N,N-dialkylanilines as radical 1,3-bis radical donors. The success of this process relies on efficient electron transfer processes and highly selective deprotonation of aminium radical cations leading to the key α-amino radical intermediates.
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23
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Jiao M, Zhang B, Wang Z, Chen B. Design of new visible light Pt photocatalyst based on the TDDFT study of properties of transition metal complexes. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mingyang Jiao
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing PR China
- CAS Key Laboratory of Bio‐based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao Shandong China
- Shandong Energy Institute Qingdao Shandong China
| | - Beibei Zhang
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing PR China
| | - Zichen Wang
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing PR China
| | - Bo‐Zhen Chen
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing PR China
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24
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Boruah DJ, Kathirvelan D, Borra S, Maurya RA, Yuvaraj P. Design, synthesis via a one-pot approach and molecular docking studies of novel pyrrolo[2,1- a]isoquinoline derivatives. NEW J CHEM 2022. [DOI: 10.1039/d1nj04115k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This new investigation describes an efficient three-component approach for the stereoselective synthesis of pyrrolo[2,1-a]isoquinolines from readily available isatins, chalcones and 1,2,3,4-tetrahydroisoquinoline without using any metal catalyst or additive.
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Affiliation(s)
- Dhruba Jyoti Boruah
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat-785006, India
| | - Devarajan Kathirvelan
- Department of Chemistry, Indian Institute of Technology Hyderabad, Sangareddy, Telangana, India
| | - Satheesh Borra
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat-785006, India
| | - Ram Awatar Maurya
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat-785006, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Panneerselvam Yuvaraj
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
- CSIR-North East Institute of Science & Technology (NEIST), Branch Laboratory, Imphal-795004, Manipur, India
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25
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Qiao J, Song Z, Huang C, Ci R, Liu Z, Chen B, Tung C, Wu L. Direct, Site‐Selective and Redox‐Neutral α‐C−H Bond Functionalization of Tetrahydrofurans via Quantum Dots Photocatalysis. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109849] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Jia Qiao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Zi‐Qi Song
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Cheng Huang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Rui‐Nan Ci
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Zan Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Chen‐Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
| | - Li‐Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Future Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
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26
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Mondal PK, Tiwari SK, Singh P, Pandey G. Direct Arylation of Distal and Proximal C(sp 3)-H Bonds of t-Amines with Aryl Diazonium Tetrafluoroborates via Photoredox Catalysis. J Org Chem 2021; 86:17184-17196. [PMID: 34786938 DOI: 10.1021/acs.joc.1c02286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A visible light-mediated arylation protocol for t-amines has been reported through the coupling of γ- and α-amino alkyl radicals with different aryl diazonium salts using Ru(bpy)3Cl2·6H2O as a photocatalyst. Structurally different 9-aryl-9,10-dihydroacridine, 1-aryl tetrahydroisoquinoline, hexahydropyrrolo[2,1-a]isoquinoline, and hexahydro-2H-pyrido[2,1-a]isoquinoline frameworks with different substitution patterns have been synthesized in good yield using this methodology.
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Affiliation(s)
- Pradip Kumar Mondal
- Department of Chemistry, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, India
| | - Sandip Kumar Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, India
| | - Pushpendra Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, India
| | - Ganesh Pandey
- Department of Chemistry, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, India
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27
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Maitland JAP, Leitch JA, Yamazaki K, Christensen KE, Cassar DJ, Hamlin TA, Dixon DJ. Switchable, Reagent‐Controlled Diastereodivergent Photocatalytic Carbocyclisation of Imine‐Derived α‐Amino Radicals. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107253] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- J. Andrew P. Maitland
- Department of Chemistry Chemistry Research Laboratory University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
| | - Jamie A. Leitch
- Department of Chemistry Chemistry Research Laboratory University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
- Current address: Department of Pharmaceutical and Biological Chemistry UCL (University College London) School of Pharmacy 29–39 Brunswick Square London WC1N 1AX UK
| | - Ken Yamazaki
- Department of Chemistry Chemistry Research Laboratory University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
- Department of Theoretical Chemistry Amsterdam Institute of Molecular and Life Sciences (AIMMS) Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit Amsterdam De Boelelaan 1083 1081 HV Amsterdam The Netherlands
| | - Kirsten E. Christensen
- Department of Chemistry Chemistry Research Laboratory University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
| | | | - Trevor A. Hamlin
- Department of Theoretical Chemistry Amsterdam Institute of Molecular and Life Sciences (AIMMS) Amsterdam Center for Multiscale Modeling (ACMM) Vrije Universiteit Amsterdam De Boelelaan 1083 1081 HV Amsterdam The Netherlands
| | - Darren J. Dixon
- Department of Chemistry Chemistry Research Laboratory University of Oxford 12 Mansfield Road Oxford OX1 3TA UK
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28
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Maitland JAP, Leitch JA, Yamazaki K, Christensen KE, Cassar DJ, Hamlin TA, Dixon DJ. Switchable, Reagent-Controlled Diastereodivergent Photocatalytic Carbocyclisation of Imine-Derived α-Amino Radicals. Angew Chem Int Ed Engl 2021; 60:24116-24123. [PMID: 34449968 PMCID: PMC8597041 DOI: 10.1002/anie.202107253] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/13/2021] [Indexed: 12/15/2022]
Abstract
A reagent‐controlled stereodivergent carbocyclisation of aryl aldimine‐derived, photocatalytically generated, α‐amino radicals possessing adjacent conjugated alkenes, affording either bicyclic or tetracyclic products, is described. Under net reductive conditions using commercial Hantzsch ester, the α‐amino radical species underwent a single stereoselective cyclisation to give trans‐configured amino‐indane structures in good yield, whereas using a substituted Hantzsch ester as a milder reductant afforded cis‐fused tetracyclic tetrahydroquinoline frameworks, resulting from two consecutive radical cyclisations. Judicious choice of the reaction conditions allowed libraries of both single and dual cyclisation products to be synthesised with high selectivity, notable predictability, and good‐to‐excellent yields. Computational analysis employing DFT revealed the reaction pathway and mechanistic rationale behind this finely balanced yet readily controlled photocatalytic system.
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Affiliation(s)
- J Andrew P Maitland
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Jamie A Leitch
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.,Current address: Department of Pharmaceutical and Biological Chemistry, UCL (University College London), School of Pharmacy, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - Ken Yamazaki
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.,Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
| | - Kirsten E Christensen
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | | | - Trevor A Hamlin
- Department of Theoretical Chemistry, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Amsterdam Center for Multiscale Modeling (ACMM), Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV, Amsterdam, The Netherlands
| | - Darren J Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
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29
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Wu W, Wang H, Chen J, Bao X, Tan C, Ye X. Dicyanopyrazine‐derived Chromophore as An Efficient Photocatalyst for α‐amino C‐H Bond Functionalization. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Wentao Wu
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province Zhejiang University of Technology 18 Chaowang Road Hangzhou 310014 P. R. China
| | - Hong Wang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province Zhejiang University of Technology 18 Chaowang Road Hangzhou 310014 P. R. China
| | - Jun Chen
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province Zhejiang University of Technology 18 Chaowang Road Hangzhou 310014 P. R. China
| | - Xiaoze Bao
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province Zhejiang University of Technology 18 Chaowang Road Hangzhou 310014 P. R. China
| | - Choon‐Hong Tan
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link 637371 Singapore
| | - Xinyi Ye
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province Zhejiang University of Technology 18 Chaowang Road Hangzhou 310014 P. R. China
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30
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Abstract
The fields of C-H functionalization and photoredox catalysis have garnered enormous interest and utility in the past several decades. Many different scientific disciplines have relied on C-H functionalization and photoredox strategies including natural product synthesis, drug discovery, radiolabeling, bioconjugation, materials, and fine chemical synthesis. In this Review, we highlight the use of photoredox catalysis in C-H functionalization reactions. We separate the review into inorganic/organometallic photoredox catalysts and organic-based photoredox catalytic systems. Further subdivision by reaction class-either sp2 or sp3 C-H functionalization-lends perspective and tactical strategies for use of these methods in synthetic applications.
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Affiliation(s)
- Natalie Holmberg-Douglas
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - David A Nicewicz
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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31
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Gant Kanegusuku AL, Roizen JL. Recent Advances in Photoredox-Mediated Radical Conjugate Addition Reactions: An Expanding Toolkit for the Giese Reaction. Angew Chem Int Ed Engl 2021; 60:21116-21149. [PMID: 33629454 PMCID: PMC8382814 DOI: 10.1002/anie.202016666] [Citation(s) in RCA: 97] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Indexed: 12/18/2022]
Abstract
Photomediated Giese reactions are at the forefront of radical chemistry, much like the classical tin-mediated Giese reactions were nearly forty years ago. With the global recognition of organometallic photocatalysts for the mild and tunable generation of carbon-centered radicals, chemists have developed a torrent of strategies to form previously inaccessible radical intermediates that are capable of engaging in intermolecular conjugate addition reactions. This Review summarizes advances in photoredox-mediated Giese reactions since 2013, with a focus on the breadth of methods that provide access to crucial carbon-centered radical intermediates that can engage in radical conjugate addition processes.
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Affiliation(s)
| | - Jennifer L Roizen
- Department of Chemistry, Duke University, Box 90346, Durham, NC, 27708-0354, USA
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32
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Qiao J, Song ZQ, Huang C, Ci RN, Liu Z, Chen B, Tung CH, Wu LZ. Direct, Site-Selective and Redox-Neutral α-C-H Bond Functionalization of Tetrahydrofurans via Quantum Dots Photocatalysis. Angew Chem Int Ed Engl 2021; 60:27201-27205. [PMID: 34536248 DOI: 10.1002/anie.202109849] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/16/2021] [Indexed: 11/06/2022]
Abstract
As one of the most ubiquitous bulk reagents available, the intrinsic chemical inertness of tetrahydrofuran (THF) makes direct and site-selective C(sp3 )-H bond activation difficult, especially under redox neutral condition. Here, we demonstrate that semiconductor quantum dots (QDs) can activate α-C-H bond of THF via forming QDs/THF conjugates. Under visible light irradiation, the resultant alkoxyalkyl radical directly engages in radical cross-coupling with α-amino radical from amino C-H bonds or radical addition with alkene or phenylacetylene, respectively. In contrast to stoichiometric oxidant or hydrogen atom transfer reagents required in previous studies, the scalable benchtop approach can execute α-C-H bond activation of THF only by a QD photocatalyst under redox-neutral condition, thus providing a broad of value added chemicals starting from bulk THFs reagent.
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Affiliation(s)
- Jia Qiao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zi-Qi Song
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Cheng Huang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Rui-Nan Ci
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Zan Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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33
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Ghosh KG, Das D, Chandu P, Sureshkumar D. Visible‐Light Driven Organo‐photocatalyzed Multicomponent Reaction for C(
sp
3
)−H Alkylation of Phosphoramides with
in situ
Generated Michael Acceptors. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100561] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Krishna Gopal Ghosh
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur 741246 West Bengal India
| | - Debabrata Das
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur 741246 West Bengal India
| | - Palasetty Chandu
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur 741246 West Bengal India
| | - Devarajulu Sureshkumar
- Department of Chemical Sciences Indian Institute of Science Education and Research Kolkata Mohanpur 741246 West Bengal India
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34
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Song Y, Wang X, Wang L, Dong Z, Fan S, Huang P, Zeng J, Cheng P. Visible-light promoted allylation of N-substituted tetrahydroisoquinoline using riboflavin tetra-acetate as photocatalyst. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Gant Kanegusuku AL, Roizen JL. Recent Advances in Photoredox‐Mediated Radical Conjugate Addition Reactions: An Expanding Toolkit for the Giese Reaction. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016666] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Jennifer L. Roizen
- Department of Chemistry Duke University Box 90346 Durham NC 27708-0354 USA
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36
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Zhou L, Wei S, Lei Z, Zhu G, Zhang Z. Transition-Metal-Free α Csp 3 -H Cyanation of Sulfonamides. Chemistry 2021; 27:7103-7107. [PMID: 33769613 DOI: 10.1002/chem.202100902] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Indexed: 12/18/2022]
Abstract
This report describes the site-selective α-functionalization of sulfonylamide derivatives through the in-situ generation of imine intermediates. The N-F sulfonylamides, which could facilitate the elimination to generate imines, are coupled with TBACN to efficiently and mildly afford α-amino cyanides. Comparing with Strecker reaction, this transformation offers a complementary strategy to efficiently construct α-amino cyanides from direct α C-H functionalization of sulfonylamindes. The reaction is also characterized by broad substrate scope and flash chromatography column free workup. More importantly, the new two-electron pathway to generate imines through manipulation of the leaving group allows us to achieve excellent α site-selectivity.
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Affiliation(s)
- Liejin Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, 321004, P. R. China
| | - Siqi Wei
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, 321004, P. R. China
| | - Ziran Lei
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, 321004, P. R. China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, 321004, P. R. China
| | - Zuxiao Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, 321004, P. R. China
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37
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Pokluda A, Anwar Z, Boguschová V, Anusiewicz I, Skurski P, Sikorski M, Cibulka R. Robust Photocatalytic Method Using Ethylene‐Bridged Flavinium Salts for the Aerobic Oxidation of Unactivated Benzylic Substrates. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Adam Pokluda
- Department of Organic Chemistry University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Zubair Anwar
- Faculty of Chemistry Adam Mickiewicz University in Poznań Uniwersytetu Poznańskiego 8 61–614 Poznań Poland
| | - Veronika Boguschová
- Department of Organic Chemistry University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Iwona Anusiewicz
- Faculty of Chemistry University of Gdańsk Wita Stwosza 63 80–308 Gdańsk Poland
| | - Piotr Skurski
- Faculty of Chemistry University of Gdańsk Wita Stwosza 63 80–308 Gdańsk Poland
| | - Marek Sikorski
- Faculty of Chemistry Adam Mickiewicz University in Poznań Uniwersytetu Poznańskiego 8 61–614 Poznań Poland
| | - Radek Cibulka
- Department of Organic Chemistry University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
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38
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Liu C, Rouhi J. Dendritic fibrous nanosilica-supported dendritic IL/Ru(ii) as photocatalysts for the dicarbofunctionalization of styrenes with carbon dioxide and amines. RSC Adv 2021; 11:9933-9941. [PMID: 35423497 PMCID: PMC8695460 DOI: 10.1039/d0ra10729h] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 06/23/2021] [Accepted: 02/05/2021] [Indexed: 12/23/2022] Open
Abstract
The effectual utilization of heterogeneous catalysts from nano sources through chemical moderation for the α-aminomethylcarboxylation of alkenes with carbon dioxide and amines is an attractive area to study. Dendritic fibrous nanosilica (DFNS) is a cost-effective, resistant, plenteous, and reproducible source with dandelion-like fibrous anatomy. The present paper is a report on an easy method to provide a family of new DFNS-supported dendritic imidazolium IL/Ru(ii) heterogeneous catalysts DFNS/IL/Ru (1-3) with high ionic density from DFNS. A positive dendritic effect was perceived in the chemical stabilization performance of CO2. DFNS/IL/Ru(ii) was appropriately identified by UV-vis spectroscopy, XPS, SEM, TEM, FT-IR spectroscopy, and TGA. It was discovered that DFNS/IL/Ru(ii) has high catalytic activity for the synthesis of quinoline-2-one through the annulation of ortho-heteroaryl anilines and CO2. DFNS/IL/Ru (3) could be reutilized ten continuous times with no notable reduction in the catalytic activity. Notably, the coveted quinoline-2-one was prepared on a multi-gram scale by deploying DFNS/IL/Ru (3) as a green heterogeneous catalyst. Owing to the attendance of the zwitterionic liquid functional groups on the exterior layer of the bio-based DFNS/IL/Ru (3) catalyst, DFNS/IL/Ru (3) expressed the highest catalytic activity. This approach provides highly functional γ-amino acids in proper yields with great selective power. This paper announces the first nanocatalyst for this transformation, comprising the DFNS-supported Ru N-heterocyclic carbine complex.
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Affiliation(s)
- Can Liu
- School of Electronic Engineering, Xi'an Shiyou University Xi'an 710065 China
| | - Jalal Rouhi
- Faculty of Physics, University of Tabriz Tabriz 51566 Iran
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39
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Friestad GK, Cullen STJ. Synthesis of Chiral Amines by C–C Bond Formation with Photoredox Catalysis. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1396-8343] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
AbstractChiral amines are key substructures of biologically active natural products and drug candidates. The advent of photoredox catalysis has changed the way synthetic chemists think about building these substructures, opening new pathways that were previously unavailable. New developments in this area are reviewed, with an emphasis on C–C bond constructions involving radical intermediates generated through photoredox processes.1 Introduction2 Radical–Radical Coupling of α-Amino Radicals2.1 Radical–Radical Coupling Involving Amine Oxidation2.2 Radical–Radical Coupling Involving Imine Reduction2.3 Couplings Involving both Amine Oxidation and Imine Reduction3 Addition Reactions of α-Amino Radicals3.1 Conjugate Additions of α-Amino Radicals3.2 Addition of α-Amino Radicals to Heteroaromatic Systems3.3 Cross Coupling via Additions to Transition Metal Complexes4 Radical Addition to C=N Bonds Using Photoredox Catalysis4.1 Intramolecular Radical Addition to C=N Bonds4.2 Intermolecular Radical Addition to C=N Bonds5 Conclusion
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40
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Ghosh KG, Das D, Chandu P, Sureshkumar D. Visible-Light-Driven Organophotocatalyzed Mono-, Di-, and Tri-C(sp 3)-H Alkylation of Phosphoramides. J Org Chem 2021; 86:2644-2657. [PMID: 33440934 DOI: 10.1021/acs.joc.0c02695] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A photocatalytic metal-free, visible-light-driven, highly atom-economic, direct multiple α-C(sp3)-H alkylation of phosphoramides and thiophosphoramides is demonstrated under environmentally benign conditions. Economically viable and commercially available Eosin-Y is used as an HAT photocatalyst for mono-α-C(sp3)-H alkylation of phosphoramide derivatives. Remarkably, di- and tri-C(sp3)-H alkylation of phosphoramides and thiophosphoramides using an acridinium photocatalyst is reported with good yield and selectivity. Mechanistic studies reveal that monoalkylation of phosphoramides by Eosin-Y follows the HAT mechanism, whereas di- and tri-C(sp3)-H alkylation by the acridinium photocatalyst follows the SET mechanism.
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Affiliation(s)
- Krishna Gopal Ghosh
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata Mohanpur, Nadia, West Bengal741246, India
| | - Debabrata Das
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata Mohanpur, Nadia, West Bengal741246, India
| | - Palasetty Chandu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata Mohanpur, Nadia, West Bengal741246, India
| | - Devarajulu Sureshkumar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata Mohanpur, Nadia, West Bengal741246, India
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41
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Zhao H, Ni N, Li X, Cheng D, Xu X. The coupling reaction of α-silylamines with Baylis-Hillman adducts by visible light photoredox catalysis. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152746] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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42
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Zhang Y, Ji P, Gao F, Huang H, Zeng F, Wang W. Photoredox Asymmetric Nucleophilic Dearomatization of Indoles with Neutral Radicals. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04696] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yueteng Zhang
- Departments of Pharmacology & Toxicology and Chemistry & Biochemistry, and BIO5 Institute, University of Arizona, Tucson, Arizona 85721, United States
| | - Peng Ji
- Departments of Pharmacology & Toxicology and Chemistry & Biochemistry, and BIO5 Institute, University of Arizona, Tucson, Arizona 85721, United States
| | - Feng Gao
- Departments of Pharmacology & Toxicology and Chemistry & Biochemistry, and BIO5 Institute, University of Arizona, Tucson, Arizona 85721, United States
| | - He Huang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-0001, United States
| | - Fanxun Zeng
- Departments of Pharmacology & Toxicology and Chemistry & Biochemistry, and BIO5 Institute, University of Arizona, Tucson, Arizona 85721, United States
| | - Wei Wang
- Departments of Pharmacology & Toxicology and Chemistry & Biochemistry, and BIO5 Institute, University of Arizona, Tucson, Arizona 85721, United States
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43
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Tian S, Yang Q, Sadeghzadeh SM. Control of the synthesis and morphology of nano dendritic CuAl 2O 4 as a nanocatalyst for photoredox-catalyzed dicarbofunctionalization of styrenes with amines and CO 2. NEW J CHEM 2021. [DOI: 10.1039/d1nj00899d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Various morphologies of a nano CuAl2O4 fiber microsphere were produced through diverse synthesis situations.
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Affiliation(s)
- Shaopeng Tian
- Xi’an Key Laboratory of Advanced Photo-Electronics Materials and Energy Conversion Device
- School of Science
- Xijing University
- Xi’an
- China
| | - Qianqian Yang
- Fundamental Education Center
- Xijing University
- Xi’an
- China
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44
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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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45
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Abadie B, Jonusauskas G, McClenaghan ND, Toullec PY, Vincent JM. Alkylation of the α-amino C-H bonds of anilines photocatalyzed by a DMEDA-Cu-benzophenone complex: reaction scope and mechanistic studies. Org Biomol Chem 2021; 19:5800-5805. [PMID: 34110351 DOI: 10.1039/d1ob00960e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Cu(ii) complex 1 incorporating a BP chromophore is a highly active and chemoselective photocatalyst for the alkylation of α-amino C-H bonds of anilines. The reaction was shown to proceed with a broad substrate scope in the absence of additives. Extensive mechanistic studies were performed, in particular using transient absorption spectroscopy, and spectroscopic signatures of key intermediates were identified in the conditions of catalysis. Finally, the ability of 1 to act as a multitask catalyst was showcased by conducting multi-component CuAAC and olefin hydroalkylation reactions in one-pot.
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Affiliation(s)
- Baptiste Abadie
- Institut des Sciences Moléculaires, CNRS UMR 5255, Univ. Bordeaux, 33405 Talence, France
| | - Gediminas Jonusauskas
- Laboratoire Ondes et Matière d'Aquitaine, CNRS UMR 5798, Univ. Bordeaux, 33405 Talence, France
| | - Nathan D McClenaghan
- Institut des Sciences Moléculaires, CNRS UMR 5255, Univ. Bordeaux, 33405 Talence, France
| | - Patrick Y Toullec
- Institut des Sciences Moléculaires, CNRS UMR 5255, Univ. Bordeaux, 33405 Talence, France
| | - Jean-Marc Vincent
- Institut des Sciences Moléculaires, CNRS UMR 5255, Univ. Bordeaux, 33405 Talence, France
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46
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Bahena EN, Griffin SE, Schafer LL. Zirconium-Catalyzed Hydroaminoalkylation of Alkynes for the Synthesis of Allylic Amines. J Am Chem Soc 2020; 142:20566-20571. [PMID: 33249842 DOI: 10.1021/jacs.0c10405] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A zirconium-catalyzed hydroaminoalkylation of alkynes to access α,β,γ-substituted allylic amines in an atom-economic fashion is reported. The reaction is compatible with N-(trimethylsilyl)benzylamine and a variety of N-benzylaniline substrates, with the latter giving the allylic amine as the sole organic product. Various internal alkynes with electron-withdrawing and electron-donating substituents were tolerated. Model intermediates of the reaction were synthesized and structurally characterized. Stoichiometric studies on key intermediates revealed that the open coordination sphere at zirconium, imparted by the tethered bis(ureate) ligand, is crucial for the coordination of neutral donors. These complexes may serve as models for the inner-sphere protonolysis reactions required for catalytic turnover.
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Affiliation(s)
- Erick Nuñez Bahena
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Samuel E Griffin
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Laurel L Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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47
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Affiliation(s)
- Lingying Leng
- Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, Texas 75390, United States
| | - Joseph M. Ready
- Department of Biochemistry, UT Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, Texas 75390, United States
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48
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Lim SH, Ahn M, Wee KR, Shim JH, Choi J, Ahn DS, Cho DW. Control of Chemoselectivity of SET-Promoted Photoaddition Reactions of Fullerene C 60 with α-Trimethylsilyl Group-Containing N-Alkylglycinates Yielding Aminomethyl-1,2-dihydrofullerenes or Fulleropyrrolidines. J Org Chem 2020; 85:12882-12900. [PMID: 32969218 DOI: 10.1021/acs.joc.0c01324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Knowledge about factors that govern chemoselectivity is pivotal to the design of reactions that are utilized to produce complex organic substances. In the current study, single-electron transfer (SET)-promoted photoaddition reactions of fullerene C60 with both trimethylsilyl and various alkyl group-containing glycinates and ethyl N-alkyl-N-((trimethylsilyl)methyl)glycinates were explored to evaluate how the nature of N-alkyl substituents of glycinate substrates and reaction conditions govern the chemoselectivity of reaction pathways followed. The results showed that photoreactions of C60 with glycinates, performed in deoxygenated conditions, produced aminomethyl-1,2-dihydrofullerenes efficiently through a pathway involving the addition of α-amino radical intermediates that are generated by sequential SET-solvent-assisted desilylation of glycinate substrates to C60. Under oxygenated conditions, photoreactions of glycinate substrates, except N-benzyl-substituted analogues, did not take place efficiently owing to quenching of 3C60* by oxygen. Interestingly, N-benzyl-substituted glycinates did react under these conditions to form fulleropyrrolidines through a pathway involving 1,3-dipolar cycloaddition of in situ formed azomethine ylides to C60. The ylide intermediates were formed by regioselective H-atom transfer from glycinates by singlet oxygen. Furthermore, methylene blue (MB)-photosensitized reactions of C60 with glycinates under oxygenated conditions took place efficiently to produce fulleropyrrolidines independent of the nature of N-alkyl substituents of glycinates.
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Affiliation(s)
- Suk Hyun Lim
- Department of Chemistry, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea
| | - Mina Ahn
- Department of Chemistry and Institute of Basic Science, Daegu University, Gyeongsan, Gyeongbuk 38453, Korea
| | - Kyung-Ryang Wee
- Department of Chemistry and Institute of Basic Science, Daegu University, Gyeongsan, Gyeongbuk 38453, Korea
| | - Jun Ho Shim
- Department of Chemistry and Institute of Basic Science, Daegu University, Gyeongsan, Gyeongbuk 38453, Korea
| | - Jungkweon Choi
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 305-701, Korea
| | - Doo-Sik Ahn
- Center for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 305-701, Korea
| | - Dae Won Cho
- Department of Chemistry, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Korea
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49
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Alfonzo E, Hande SM. Photoredox and Weak Brønsted Base Dual Catalysis: Alkylation of α-Thio Alkyl Radicals. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03851] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Edwin Alfonzo
- Medicinal Chemistry, Research and Early Development, Oncology R&D, AstraZeneca, Waltham, Massachusetts 02451, United States
| | - Sudhir M. Hande
- Medicinal Chemistry, Research and Early Development, Oncology R&D, AstraZeneca, Waltham, Massachusetts 02451, United States
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50
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Rostoll-Berenguer J, Blay G, Pedro JR, Vila C. Photocatalytic Giese Addition of 1,4-Dihydroquinoxalin-2-ones to Electron-Poor Alkenes Using Visible Light. Org Lett 2020; 22:8012-8017. [DOI: 10.1021/acs.orglett.0c02953] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jaume Rostoll-Berenguer
- Departament de Quı́mica Orgànica, Facultat de Quı́mica, Universitat de València, Dr. Moliner 50, Burjassot, 46100 València, Spain
| | - Gonzalo Blay
- Departament de Quı́mica Orgànica, Facultat de Quı́mica, Universitat de València, Dr. Moliner 50, Burjassot, 46100 València, Spain
| | - José R. Pedro
- Departament de Quı́mica Orgànica, Facultat de Quı́mica, Universitat de València, Dr. Moliner 50, Burjassot, 46100 València, Spain
| | - Carlos Vila
- Departament de Quı́mica Orgànica, Facultat de Quı́mica, Universitat de València, Dr. Moliner 50, Burjassot, 46100 València, Spain
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