1
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Zhang QB, Li F, Pan B, Yu L, Yue XG. Visible-Light-Mediated [2+2] Photocycloadditions of Alkynes. Chemistry 2024; 30:e202401501. [PMID: 38806409 DOI: 10.1002/chem.202401501] [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: 04/17/2024] [Revised: 05/21/2024] [Accepted: 05/27/2024] [Indexed: 05/30/2024]
Abstract
Visible-light-mediated [2+2] photocycloaddition reaction can be considered an ideal solution due to its green and sustainable properties, and is one of the most efficient methods to synthesize four-membered ring motifs. Although research on the [2+2] photocycloaddition of alkynes is challenging because of the diminished reactivity of alkynes, and the more significant ring strain of the products, remarkable achievements have been made in this field. In this article, we highlight the recent advances in visible-light-mediated [2+2] photocycloaddition reactions of alkynes, with focus on the reaction mechanism and the late-stage synthetic applications. Advances in obtaining cyclobutenes, azetines, and oxetene active intermediates continue to be breakthroughs in this fascinating field of research.
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Affiliation(s)
- Qing-Bao Zhang
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, CN, 262700, People's Republic of China
| | - Feng Li
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, CN, 262700, People's Republic of China
| | - Bin Pan
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, CN, 262700, People's Republic of China
| | - Lei Yu
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, CN, 262700, People's Republic of China
| | - Xiang-Guo Yue
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang, CN, 262700, People's Republic of China
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2
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Fernandes RA, Ranjan RS, Choudhary P. K 2S 2O 8-Mediated or Azobisisobutyronitrile-Catalyzed Regioselective Aerobic Oxidative Cleavage of 1-Arylbutadienes to Cinnamaldehydes. Org Lett 2024; 26:6247-6252. [PMID: 39018343 DOI: 10.1021/acs.orglett.4c02241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/19/2024]
Abstract
This work reveals the regioselective oxidative cleavage of 1-arylbutadienes to cinnamaldehydes mediated by K2S2O8 or catalyzed by azobisisobutyronitrile, a very common free radical initiator, in an easy to handle, simple procedure and free of transition metals. This approach demonstrates excellent regioselectivity, mild reaction conditions, and compatibility with a broad range of functional groups (45 examples).
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Affiliation(s)
- Rodney A Fernandes
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Ravikant S Ranjan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Priyanka Choudhary
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
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3
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Zhang B, Zhang S, Zhu B, Shen W, She R. Persulfate activation by nanoscale zero-valent iron supported by modified blast furnace slag for degradation of phenol wastewater. ENVIRONMENTAL RESEARCH 2024; 260:119434. [PMID: 38945515 DOI: 10.1016/j.envres.2024.119434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/05/2024] [Accepted: 06/15/2024] [Indexed: 07/02/2024]
Abstract
Nano-zero valent iron (nZVI) was anchored and dispersed on the surface of acid-modified blast furnace slag (mBFS) through the liquid phase reduction method. The synthesized nZVI@mBFS composite exhibited remarkable ability to degrade phenol when used in conjunction with persulfate (PDS), 97.8% phenol could be eliminated in 30 min. All the anions like SO42-, HCO3-, H2PO4-, and CO32- were detrimental to the phenol degradation in nZVI@mBFS system. Moreover, electron paramagnetic resonance (EPR) analysis and radical scavenging tests confirmed that SO4•-, •OH and •O2- were the principal reactive oxygen species (ROSs) generated during the reaction process. The potential degradation pathways were also deduced based on the results obtained from gas chromatograph-mass spectrometer (GC-MS) analysis. Collectively, this study holds substantial significance in regards to recycling industrial solid wastes, devising efficient persulfate-activated materials, and treating wastewater.
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Affiliation(s)
- Bo Zhang
- The School of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou, 412000, China
| | - Shiwei Zhang
- The School of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou, 412000, China.
| | - Bohong Zhu
- The School of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou, 412000, China
| | - Weili Shen
- The School of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou, 412000, China
| | - Renjie She
- The School of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou, 412000, China
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4
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Liu X, Hee S, Sapir NG, Li A, Farkruzzaman S, Liu J, Chen Y. n-Bu 4NI/K 2S 2O 8-MEDIATED C-N COUPLING BETWEEN ALDEHYDES AND AMIDES. European J Org Chem 2024; 27:e202400067. [PMID: 39051029 PMCID: PMC11268833 DOI: 10.1002/ejoc.202400067] [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: 01/19/2024] [Indexed: 07/27/2024]
Abstract
n-Bu4NI/K2S2O8 mediated C-N coupling between aldehydes and amides is reported. A strong electronic effect is observed on the aromatic aldehyde substrates. The transformylation from aldehyde to amide takes place exclusively when an aromatic aldehyde bears electron-donating groups at either the ortho or para position of the formyl group, while the cross-dehydrogenative coupling dominates in the absence of these groups. Both the density functional theory (DFT) thermochemistry calculations and experimental data support the proposed single electron transfer mechanism with the formation of an acyl radical intermediate in the cross-dehydrogenative coupling. The n-Bu4NI/K2S2O8 mediated oxidative cyclization between 2-aminobenzamide and aldehydes is also reported, with four quinazolin-4(3H)-ones prepared in 65-99% yields.
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Affiliation(s)
- Xiaochen Liu
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York, 11367, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York 10016, United States
| | - Samual Hee
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York, 11367, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York 10016, United States
| | - Netanel G Sapir
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York, 11367, United States
| | - Alvin Li
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York, 11367, United States
| | - Syed Farkruzzaman
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York, 11367, United States
| | - Jianbo Liu
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York, 11367, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York 10016, United States
| | - Yu Chen
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York, 11367, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York 10016, United States
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5
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Wang C, Chen Z, Sun J, Tong L, Wang W, Song S, Li J. Sulfonamide-directed site-selective functionalization of unactivated C(sp 3)-H enabled by photocatalytic sequential electron/proton transfer. Nat Commun 2024; 15:5087. [PMID: 38876986 PMCID: PMC11178871 DOI: 10.1038/s41467-024-49337-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 05/31/2024] [Indexed: 06/16/2024] Open
Abstract
The generation of alkyl radical from C(sp3)-H substrates via hydrogen atom abstraction represents a desirable yet underexplored strategy in alkylation reaction since involving common concerns remain adequately unaddressed, such as the harsh reaction conditions, limited substrate scope, and the employment of noble metal- or photo-catalysts and stoichiometric oxidants. Here, we utilize the synergistic strategy of photoredox and hydrogen atom transfer (HAT) catalysis to accomplish a general and practical functionalization of unactived C(sp3)-H centers with broad reaction scope, high functional group compatibility, and operational simplicity. A combination of validation experiments and density functional theory reveals that the N-centered radicals, generated from free N - H bond in a stepwise electron/proton transfer event, are the key intermediates that enable an intramolecular 1,5-HAT or intermolecular HAT process for nucleophilic carbon-centered radicals formation to achieve heteroarylation, alkylation, amination, cyanation, azidation, trifluoromethylthiolation, halogenation and deuteration. The practical value of this protocol is further demonstrated by the gram-scale synthesis and the late-stage functionalization of natural products and drug derivatives.
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Affiliation(s)
- Chaodong Wang
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P. R. of China
| | - Zhi Chen
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P. R. of China
| | - Jie Sun
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P. R. of China
| | - Luwei Tong
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P. R. of China
| | - Wenjian Wang
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P. R. of China
| | - Shengjie Song
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P. R. of China
| | - Jianjun Li
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou, P. R. of China.
- Taizhou Key Laboratory of Advanced Manufacturing Technology, Taizhou Institute, Zhejiang University of Technology, Taizhou, P. R. of China.
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6
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Liu X, Hee S, Sapir NG, Li A, Liu J, Chen Y. n-Bu 4NI/K 2S 2O 8 Mediated Csp 2-Csp 2 Bond Cleavage - Transformylation from p-Anisaldehyde to Primary Amides. Adv Synth Catal 2024; 366:2489-2494. [PMID: 38895098 PMCID: PMC11182648 DOI: 10.1002/adsc.202301505] [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: 12/23/2023] [Indexed: 06/21/2024]
Abstract
n-Bu4NI/K2S2O8 mediated transformylation from p-anisaldehyde to primary amides is reported. The mechanistic studies suggest the reaction occurs via a single electron transfer pathway. Based on the DFT electronic structure calculations of various reaction pathways, the most plausible mechanism involves the formation of a phenyl radical cation and an arenium ion as the key intermediates. It represents the first example where p-anisaldehyde is employed as a formyl source via a non-metal mediated Csp2-Csp2 bond cleavage.
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Affiliation(s)
- Xiaochen Liu
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York 11367, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York 10016, United States
| | - Samual Hee
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York 11367, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York 10016, United States
| | - Netanel G Sapir
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York 11367, United States
| | - Alvin Li
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York 11367, United States
| | - Jianbo Liu
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York 11367, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York 10016, United States
| | - Yu Chen
- Department of Chemistry and Biochemistry, Queens College of the City University of New York, 65-30 Kissena Blvd., Queens, New York 11367, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, 365 Fifth Ave., New York, New York 10016, United States
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7
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Zhou H, Zhang Y, Shi C, Yuan K, Zhou R, Zhao P, Qu Y, Wang Y. Synthesis of self-supported NiCoFe(OH) x via fenton-like effect corrosion for highly efficient water oxidation. J Colloid Interface Sci 2024; 663:725-734. [PMID: 38432171 DOI: 10.1016/j.jcis.2024.02.198] [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: 11/27/2023] [Revised: 02/27/2024] [Accepted: 02/27/2024] [Indexed: 03/05/2024]
Abstract
Efficientandinexpensiveoxygenevolutionreaction(OER)catalysts are essential for the electrochemical splitting of water into hydrogen fuel. Herein, we have successfully synthesized NiCoFe(OH)x nanosheets on Ni-Fe foam (NFF) by exploiting the Fenton-like effect of Co2+ and S2O82- to corrode the NFF foam. The as-prepared NiCoFe(OH)x/NFF exhibits the porous structure with the interconnected nanosheets that are firmly bonded to the conductive substrate of NFF, thereby enhancing ions and charge transfer kinetics. The unique structure and composition of NiCoFe(OH)x/NFF result in the low overpotentials of 200 and 262 mV at current densities of 10 and 100 mA cm-2, respectively, as well as a low Tafel slope of 53.25 mV dec-1. In addition, NiCoFe(OH)x/NFF displays low overpotentials of 267 and 294 mV at a high current density of 100 mA cm-2 in simulated and real seawater, respectively. Furthermore, the assembled NiCoFe(OH)x//Pt/C water electrolysis cell has achieved a current density of 10 mA cm-2 at a low voltage of 1.49 V, and displayed the good stability with slight attenuation for 110 h. The high OER performance of NiCoFe(OH)x is attributed to the co-catalytic effect of the three metal ions and the interconnected porous nanosheet structure.
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Affiliation(s)
- Huajun Zhou
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Institute of Advanced Energy Materials and System, North University of China, Taiyuan 030051, PR China
| | - Yuzhen Zhang
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Institute of Advanced Energy Materials and System, North University of China, Taiyuan 030051, PR China
| | - Chenxi Shi
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China
| | - Kai Yuan
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China
| | - Rui Zhou
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China
| | - Peihua Zhao
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China
| | - Yongping Qu
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China.
| | - Yanzhong Wang
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Institute of Advanced Energy Materials and System, North University of China, Taiyuan 030051, PR China.
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8
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Datta K, Mitra B, Pariyar GC, Ghosh P. KI mediated one-pot cascade reaction for synthesis of 1,3,4-selenadiazoles. RSC Adv 2024; 14:15449-15454. [PMID: 38741970 PMCID: PMC11089885 DOI: 10.1039/d4ra01994f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 04/30/2024] [Indexed: 05/16/2024] Open
Abstract
An efficient catalytic system consisting of KI and K2S2O8 for a one-pot pseudo three-component cascade reaction in the preparation of a diverse array of 1,3,4-selenadiazole derivatives from easily accessible precursors aldehydes, hydrazine and elemental selenium is demonstrated in this paper. Here, KI is used as the surrogate of iodine and K2S2O8 as the oxidant. The key advantages of this protocol include an easy reaction set up, operational simplicity, high functional group tolerance and utilisation of low toxicity chemicals. Further, a radical quenching reaction was also performed to confirm the mechanistic pathway.
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Affiliation(s)
- Kumaresh Datta
- Department of Chemistry, University of North Bengal Darjeeling West Bengal India +91 0353 2699001 +91 0353 2776381
| | - Bijeta Mitra
- Department of Chemistry, University of North Bengal Darjeeling West Bengal India +91 0353 2699001 +91 0353 2776381
| | - Gyan Chandra Pariyar
- Department of Food Technology, University of North Bengal Darjeeling West Bengal India
| | - Pranab Ghosh
- Department of Chemistry, University of North Bengal Darjeeling West Bengal India +91 0353 2699001 +91 0353 2776381
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9
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Manikandan B, Thamotharan S, Blacque O, Selva Ganesan S. Deconstructive annulation mediated one-pot synthesis of xanthene derivatives. Org Biomol Chem 2024; 22:3279-3286. [PMID: 38572985 DOI: 10.1039/d4ob00093e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Direct conversion of naphthoxazines to diverse xanthene derivatives was achieved under one-pot operation through deconstructive annulation methodology. Sequential oxidative C(sp3)-O/C(sp3)-N cleavage followed by intramolecular/intermolecular annulation reaction was carried out under aerobic reaction conditions. Mechanistic analyses performed on the substrate revealed that the C(sp3)-O bond cleavage supersedes the C(sp3)-N bond scission. The in situ generated Betti base intermediate through the C(sp3)-O cleavage was successfully isolated. Based on a molecular docking investigation, the intermolecular annulated products demonstrated good α-glucosidase inhibitory properties.
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Affiliation(s)
- Balasubramaniyam Manikandan
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur-613401, Tamil Nadu, India.
| | - Subbiah Thamotharan
- Biomolecular Crystallography Laboratory and DBT-Bioinformatics Center, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, 613401, Tamil Nadu, India
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Subramaniapillai Selva Ganesan
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur-613401, Tamil Nadu, India.
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10
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Suman P, Tomar K, Nishad CS, Banerjee B. Metal-free synthesis of carbamoylated dihydroquinolinones via cascade radical annulation of cinnamamides with oxamic acids. Org Biomol Chem 2024; 22:1821-1833. [PMID: 38332745 DOI: 10.1039/d3ob01856c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
We report a metal-free procedure for the sustainable synthesis of carbamoylated dihydroquinolinones via tandem addition-cyclization of carbamoyl radicals to cinnamamides. Readily accessible, non-toxic and inexpensive oxamic acids are used as carbamoyl radical precursors. This highly straightforward method provides a mild and environmentally friendly route showing good atom economy and excellent functional group tolerance to obtain diverse medicinally important carbamoylated dihydroquinolinones in one pot. The cascade cyclization is also modular and step-economical with a wide substrate scope and the products were obtained in good to excellent yields. Additionally, the tolerance to air and water, operational simplicity, low cost and scalability enhance the practical value of the proposed synthetic strategy. Preliminary mechanistic studies reveal that cheap and environment-friendly ammonium persulfate acts as a radical initiator in the cascade process and generates carbamoyl radicals from oxamic acids. The synthetic utility of this method is further demonstrated by late stage functionalization of drug molecules with good yields.
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Affiliation(s)
- Pallav Suman
- Department of Chemistry, Central University of Punjab, Bathinda-151401, India.
| | - Kirti Tomar
- Department of Chemistry, Central University of Punjab, Bathinda-151401, India.
| | | | - Biplab Banerjee
- Department of Chemistry, Central University of Punjab, Bathinda-151401, India.
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11
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Wang WF, Liu T, Cheng YL, Song QH. Visible-light-promoted difluoroamidated oxindole synthesis via electron donor-acceptor complexes. Org Biomol Chem 2024; 22:805-810. [PMID: 38170477 DOI: 10.1039/d3ob01885g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
A method involving a metal-free visible-light-promoted synthesis was developed for the construction of difluoroalkylated oxindoles with N-phenylacrylamides and bromodifluoroacetamides as starting materials in the presence of N,N,N',N'-tetramethylethylenediamine (TMEDA). Twenty-four examples of the photochemical reaction were successfully performed, with good yields (44-99%) and excellent substrate adaptability. Mechanistic studies showed that the visible-light-promoted reaction involved a radical addition to N-phenylacrylamide, intramolecular cyclization, dehydrogenation, and rearomatization. The difluoroacetamide radical was produced as a result of electron transfer to bromodifluoroacetamides from the electron donor TMEDA in their electron-donor-acceptor (EDA) complexes under visible light irradiation. This protocol is a promising photochemical method due to its advantages of mild conditions, simple operation, wide substrate scope and high yields. And the obtained products may have great potential in the field of medicine.
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Affiliation(s)
- Wei-Feng Wang
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China.
| | - Tao Liu
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China.
| | - Yan-Liang Cheng
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China.
| | - Qin-Hua Song
- Department of Chemistry, University of Science and Technology of China, Hefei, 230026, P. R. China.
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12
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Qin H, Wei G, Lou Y, Zheng X, Bao M, Zhang Y, Huang P. K 2S 2O 8-mediated direct C-H heteroarylation/hydroxylation of indolin-2-ones with quinoxalin-2(1 H)-ones. Org Biomol Chem 2024; 22:279-283. [PMID: 38053489 DOI: 10.1039/d3ob01792c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Herein, a K2S2O8-mediated direct heteroarylation and hydroxylation reaction between quinoxalin-2(1H)-ones with a C(sp2)-H bond and indolin-2-ones with a C(sp3)-H bond via an oxidative cross-coupling reaction has been reported. We have successfully established a feasible and concise reaction system that represents the first example of free-radical-promoted heteroarylation and hydroxylation reaction on the C-3 position of oxindole. A series of 3-substituted 3-hydroxyoxindoles are obtained in 0-83% yield using this methodology.
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Affiliation(s)
- Hui Qin
- Center for Clinical Pharmacy, Cancer Center, Department of Pharmacy, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China.
- Key Laboratory of Endocrine Gland Diseases of Zhejiang Province, Hangzhou, 310014, China
| | - Guoliang Wei
- Center for Clinical Pharmacy, Cancer Center, Department of Pharmacy, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China.
| | - Yutao Lou
- College of pharmacy, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Xiaowei Zheng
- Center for Clinical Pharmacy, Cancer Center, Department of Pharmacy, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China.
- Key Laboratory of Endocrine Gland Diseases of Zhejiang Province, Hangzhou, 310014, China
| | - Meihua Bao
- Academician Workstation, School of Stomatology, Changsha Medical University, Changsha, China
| | - Yiwen Zhang
- Center for Clinical Pharmacy, Cancer Center, Department of Pharmacy, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China.
- Key Laboratory of Endocrine Gland Diseases of Zhejiang Province, Hangzhou, 310014, China
| | - Ping Huang
- Center for Clinical Pharmacy, Cancer Center, Department of Pharmacy, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang, 310014, China.
- Key Laboratory of Endocrine Gland Diseases of Zhejiang Province, Hangzhou, 310014, China
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13
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Xie Y, Guan D, Deng Y, Sato Y, Luo Y, Chen G. Factors hindering the degradation of pharmaceuticals from human urine in an iron-activated persulfate system. J Environ Sci (China) 2024; 135:130-148. [PMID: 37778790 DOI: 10.1016/j.jes.2022.12.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 10/03/2023]
Abstract
This study investigated the degradation of clofibric acid (CFA), bezafibrate (BZF), and sulfamethoxazole (SMX) in synthetic human urine using a novel mesoporous iron powder-activated persulfate system (mFe-PS system), and identified the factors limiting their degradation in synthetic human urine. A kinetic model was established to expose the radical production in various reaction conditions, and experiments were conducted to verify the modeling results. In the phosphate-containing mFe-PS system, the 120 min removal efficiency of CFA decreased from 95.1% to 76.6% as the phosphate concentration increased from 0.32 to 6.45 mmol/L, but recovered to 90.5% when phosphate concentration increased to 16.10 mmol/L. Meanwhile, the increased concentration of phosphate from 0.32 to 16.10 mmol/L reduced the BZF degradation efficacy from 91.5% to 79.0%, whereas SMX removal improved from 37.3% to 62.9%. The mFe-PS system containing (bi)carbonate, from 4.20 to 166.70 mmol/L, reduced CFA and BZF removal efficiencies from 100% to 76.8% and 80.4%, respectively, and SMX from 83.5% to 56.7% within a 120-min reaction time. In addition, alkaline conditions (pH ≥ 8.0) inhibited CFA and BZF degradations, while nonacidic pH (pH ≥ 7.0) remarkably inhibited SMX degradation. Results of the kinetic model indicated the formation of phosphate (H2PO4·/HPO4·-) and/or carbonate radicals (CO3·-) could limit pharmaceutical removal. The transformation products (TPs) of the pharmaceuticals revealed more incompletely oxidized TPs occurred in the phosphate- and (bi)carbonate-containing mFe-PS systems, and indicated that H2PO4·/HPO4·- mainly degraded pharmaceuticals via a benzene ring-opening reaction while CO3·- preferentially oxidized pharmaceuticals via a hydroxylation reaction.
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Affiliation(s)
- Yiruiwen Xie
- Department of Civil and Environmental Engineering, Water Technology Lab, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Hong Kong 999077, China
| | - Dao Guan
- Department of Civil and Environmental Engineering, Water Technology Lab, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Hong Kong 999077, China.
| | - Yangfan Deng
- Department of Civil and Environmental Engineering, Water Technology Lab, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Hong Kong 999077, China
| | - Yugo Sato
- Department of Civil and Environmental Engineering, Water Technology Lab, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Hong Kong 999077, China
| | - Yu Luo
- Department of Civil and Environmental Engineering, Water Technology Lab, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Hong Kong 999077, China
| | - Guanghao Chen
- Department of Civil and Environmental Engineering, Water Technology Lab, Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, The Hong Kong University of Science & Technology, Hong Kong 999077, China.
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14
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Tsai CY, Jhang YJ, Wu YK, Ryu I. Electron-Transfer Protocol for the Hydroxyalkenylation of Alkenes Using 1,2-Bis(phenylsulfonyl)ethylene. Angew Chem Int Ed Engl 2023; 62:e202311807. [PMID: 37850999 DOI: 10.1002/anie.202311807] [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: 08/15/2023] [Revised: 10/09/2023] [Accepted: 10/11/2023] [Indexed: 10/19/2023]
Abstract
We report a protocol for alkene hydroxyalkenylation. Using a persulfate anion as a one-electron-oxidation reagent and 1,2-bis(phenylsulfonyl)ethylene as a radical acceptor in the presence of water, alkenes were converted into the corresponding 1-phenylsulfonyl-4-hydroxyalkenes in good to high yields. The hydroxyalkenylation process involves the nucleophilic hydroxylation of alkene radical cations to give β-hydroxyalkyl radicals, which, after a radical addition/β-elimination sequence, provide the products. We also report a photocatalytic protocol for alkoxyalkenylation.
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Affiliation(s)
- Chen-Yang Tsai
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (NYCU), Hsinchu, 30010, Taiwan
| | - Yin-Jia Jhang
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (NYCU), Hsinchu, 30010, Taiwan
| | - Yen-Ku Wu
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (NYCU), Hsinchu, 30010, Taiwan
| | - Ilhyong Ryu
- Department of Applied Chemistry, National Yang Ming Chiao Tung University (NYCU), Hsinchu, 30010, Taiwan
- Organization for Research Promotion, Osaka Metropolitan University (OMU), 599-8531, Sakai, Osaka, Japan
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15
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Gautam D, Gahlaut PS, Pathak S, Jana B. K 2S 2O 8 promoted metal-free direct C-alkylation of acetophenones with alcohols. Org Biomol Chem 2023. [PMID: 37997393 DOI: 10.1039/d3ob01526b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Herein, we report a metal-free synthetic methodology for the C-alkylation of acetophenones following a hydrogen borrowing-like pathway using the commercially available inorganic oxidant K2S2O8 in conjunction with KOtBu. This study articulates the potential of K2S2O8 in fast initiation of the oxidation of benzyl alcohols to develop an atom-economical, easy, and more efficient methodology for the C-alkylation of various acetophenones and synthesis of a variety of substituted quinolines. Experimental data from control experiments, literature and characterization of intermediates through spectroscopic techniques support the proposed plausible mechanism.
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Affiliation(s)
- Deepak Gautam
- Organometallics and Supramolecular Chemistry Laboratory (OMSCL), Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan-302017, India.
| | - Puneet Singh Gahlaut
- Organometallics and Supramolecular Chemistry Laboratory (OMSCL), Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan-302017, India.
| | - Shristi Pathak
- Organometallics and Supramolecular Chemistry Laboratory (OMSCL), Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan-302017, India.
| | - Barun Jana
- Organometallics and Supramolecular Chemistry Laboratory (OMSCL), Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, Rajasthan-302017, India.
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16
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Biswas S, Chandu P, Garai S, Sureshkumar D. Diastereoselective Hydroacylation of Cyclopropenes by Visible-Light Photocatalysis. Org Lett 2023; 25:7863-7867. [PMID: 37882545 DOI: 10.1021/acs.orglett.3c03095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
An efficient and general strategy for the hydroacylation of cyclopropene is disclosed for synthesizing various 2-acylcyclopropane derivatives under mild reaction conditions. High functional group tolerance of this protocol features a novel route to access a divergent synthesis of acylated cyclopropane in a diastereoselective manner by photoinduced decarboxylation of α-ketoacid followed by acyl radical addition to cyclopropene. Additionally, the regioselective addition of acyl radical at the least substituted olefinic carbon center with trans-selective fashion makes this protocol more appealing toward natural product development.
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Affiliation(s)
- Sourabh Biswas
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India 741246
| | - Palasetty Chandu
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India 741246
| | - Sumit Garai
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India 741246
| | - Devarajulu Sureshkumar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India 741246
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17
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Gupta A, Laha JK. Growing Utilization of Radical Chemistry in the Synthesis of Pharmaceuticals. CHEM REC 2023; 23:e202300207. [PMID: 37565381 DOI: 10.1002/tcr.202300207] [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: 06/15/2023] [Revised: 07/19/2023] [Indexed: 08/12/2023]
Abstract
Our current unhealthy lifestyle and the exponential surge in the population getting affected by a variety of diseases have made pharmaceuticals or drugs an imperative part of life, making the development of innovative strategies for drug discovery or the introduction of refined, cost-effective and modern technologies for the synthesis of clinically used drugs, a need of the hour. Ever since their discovery, free radicals and radical cations or anions as reactive intermediates have captivated the chemists, resulting in an exceptional utilization of these moieties throughout the field of chemical synthesis, owing to their unprecedented and widespread reactivity. Sticking with the idea of not judging the book by its cover, despite the conventional thought process of radicals being unstable and difficult to control entities, scientists and academicians around the globe have done an appreciable amount of work utilizing both persistent as well as transient radicals for a variety of organic transformations, exemplifying them with the synthesis of significant biologically active pharmaceutical ingredients. This review truly accounts for the organic radical transformations including radical addition, radical cascade cyclization, radical/radical cross-coupling, coupling with metal-complexes and radical cations coupling with nucleophiles, that offers fascinating and unconventional approaches towards the construction of intricate structural frameworks of marketed APIs with high atom- and step-economy; complementing the otherwise employed traditional methods. This tutorial review presents a comprehensive package of diverse methods utilized for radical generation, featuring their reactivity to form critical bonds in pharmaceutical total synthesis or in building key starting materials or intermediates of their synthetic journey, acknowledging their excellence, downsides and underlying mechanisms, which are otherwise poorly highlighted in the literature. Despite great achievements over the past few decades in this area, many challenges and obstacles are yet to be unraveled to shorten the distance between the academics and the industry, which are all discussed in summary and outlook.
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Affiliation(s)
- Anjali Gupta
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, Sahibzada Ajit Singh Nagar, Mohali, 160062, India
| | - Joydev K Laha
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education & Research (NIPER) S.A.S. Nagar, Sahibzada Ajit Singh Nagar, Mohali, 160062, India
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18
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Oya R, Ota K, Fuki M, Kobori Y, Higashi M, Nagao K, Ohmiya H. Biomimetic design of an α-ketoacylphosphonium-based light-activated oxygenation auxiliary. Chem Sci 2023; 14:10488-10493. [PMID: 37799983 PMCID: PMC10548508 DOI: 10.1039/d3sc03572g] [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: 07/12/2023] [Accepted: 09/04/2023] [Indexed: 10/07/2023] Open
Abstract
The biomimetic design of a transition metal complex based on the iron(iv)-oxo porphyrin π-cation radical species in cytochrome P450 enzymes has been studied extensively. Herein, we translate the functions of this iron(iv)-oxo porphyrin π-cation radical species to an α-ketoacyl phosphonium species comprised of non-metal atoms and utilize it as a light-activated oxygenation auxiliary for ortho-selective oxygenation of anilines. Visible light irradiation converts the α-ketoacyl phosphonium species to the excited state, which acts as a transiently generated oxidant. The intramolecular nature of the process ensures high regioselectivity and chemoselectivity. The auxiliary is easily removable. A one-pot protocol is also described.
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Affiliation(s)
- Ryoto Oya
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University Kakuma-Machi Kanazawa 920-1192 Japan
| | - Kenji Ota
- Institute for Chemical Research, Kyoto University Gokasho, Uji Kyoto 611-0011 Japan
| | - Masaaki Fuki
- Molecular Photoscience Research Center, Department of Chemistry, Graduate School of Science, Kobe University Kobe 657-8501 Japan
| | - Yasuhiro Kobori
- Molecular Photoscience Research Center, Department of Chemistry, Graduate School of Science, Kobe University Kobe 657-8501 Japan
| | - Masahiro Higashi
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University Kyoto 615-8510 Japan
| | - Kazunori Nagao
- Institute for Chemical Research, Kyoto University Gokasho, Uji Kyoto 611-0011 Japan
| | - Hirohisa Ohmiya
- Institute for Chemical Research, Kyoto University Gokasho, Uji Kyoto 611-0011 Japan
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19
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Jing Q, Qiao FC, Sun J, Wang JY, Zhou MD. Persulfate promoted carbamoylation of N-arylacrylamides and N-arylcinnamamides with 4-carbamoyl-Hantzsch esters. Org Biomol Chem 2023; 21:7530-7534. [PMID: 37674373 DOI: 10.1039/d3ob01240a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Carbamoyl-Hantzsch esters were used as carbamoyl radical precursors for oxidative carbamoylation of N-arylacrylamides and N-arylcinnamamides in the presence of inexpensive persulfates. This protocol can be applied to a broad range of substrates with various functional groups, providing a variety of 3,3-disubstituted oxindoles and 3,4-disubstituted dihydroquinolin-2(1H)-ones in moderate to good yields via an intermolecular addition/cyclization process.
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Affiliation(s)
- Qi Jing
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
| | - Fu-Ci Qiao
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Jing Sun
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
| | - Jing-Yun Wang
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Ming-Dong Zhou
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
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20
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Laha JK, Panday S, Weber JP, Breugst M. Divergent synthesis of pyrrole carboxamides from pyrrole carboxaldehyde and formamides/amines via oxidative amidation involving pyrrole acyl radicals. Chem Commun (Camb) 2023; 59:10259-10262. [PMID: 37534600 DOI: 10.1039/d3cc02766j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2023]
Abstract
A non-traditional approach for the synthesis of pyrrole carboxamides from pyrrole carboxaldehyde and formamides or amines with catalytic amounts of nBu4NI and TBHP as oxidants is reported herein. The method is operationally simple providing straightforward access to primary, secondary, and tertiary pyrrole carboxamides in good to excellent yields utilizing inexpensive reagents under mild conditions. Unlike traditional amidations that involve ionic reactions, a mechanistic study of our current method unveils the involvement of 2- or 3-pyrrole acyl radicals that are otherwise rarely postulated. The applicability of the current method is further demonstrated in the synthesis of a drug-like compound, i.e., an optically pure carboetomidate amide.
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Affiliation(s)
- Joydev K Laha
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India.
| | - Surabhi Panday
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India.
| | - J Patrick Weber
- Institut für Chemie, Technische Universität Chemnitz, 09111, Chemnitz, Germany.
| | - Martin Breugst
- Institut für Chemie, Technische Universität Chemnitz, 09111, Chemnitz, Germany.
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21
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Sikdar P, Choudhuri T, Paul S, Das S, Bagdi AK. K 2S 2O 8-Promoted Consecutive Tandem Cyclization/Oxidative Halogenation: Access to 3-Halo-Pyrazolo[1,5- a]pyrimidines. ACS OMEGA 2023; 8:23851-23859. [PMID: 37426282 PMCID: PMC10323951 DOI: 10.1021/acsomega.3c02270] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 06/09/2023] [Indexed: 07/11/2023]
Abstract
A one-pot methodology has been developed to synthesize 3-halo-pyrazolo[1,5-a]pyrimidine derivatives through the three-component reaction of amino pyrazoles, enaminones (or chalcone), and sodium halides. The use of easily accessible 1,3-biselectrophilic reagents like enaminones and chalcone offers a straightforward approach for the synthesis of 3-halo-pyrazolo[1,5-a]pyrimidines. The reaction proceeded through a cyclocondensation reaction between amino pyrazoles with enaminones/chalcone in the presence of K2S2O8 followed by oxidative halogenations by NaX-K2S2O8. Mild and environmentally benign reaction conditions, wide functional group tolerance, and scalability of the reaction are the attractive facet of this protocol. The combination of NaX-K2S2O8 is also beneficial for the direct oxidative halogenations of pyrazolo[1,5-a]pyrimidines in water.
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22
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Laha JK, Gupta P, Hazra A. Sulfate radical anion-induced benzylic oxidation of N-(arylsulfonyl)benzylamines to N-arylsulfonylimines. Beilstein J Org Chem 2023; 19:771-777. [PMID: 37346499 PMCID: PMC10280053 DOI: 10.3762/bjoc.19.57] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 05/25/2023] [Indexed: 06/23/2023] Open
Abstract
A mild, operationally convenient, and practical method for the synthesis of synthetically useful N-arylsulfonylimines from N-(arylsulfonyl)benzylamines using K2S2O8 in the presence of pyridine as a base is reported herein. In addition, a "one-pot" tandem synthesis of pharmaceutically relevant N-heterocycles by the reaction of N-arylsulfonylimines, generated in situ with ortho-substituted anilines is also reported. The key features of the protocol include the use of a green oxidant, a short reaction time (30 min), chromatography-free isolation, scalability, and economical, delivering N-arylsulfonylimines in excellent yields of up to 96%. While the oxidation of N-aryl(benzyl)amines to N-arylimines using K2S2O8 is reported to be problematic, the oxidation of N-(arylsulfonyl)benzylamines to N-arylsulfonylimines using K2S2O8 has been achieved for the first time. The dual role of the sulfate radical anion (SO4·-), including hydrogen atom abstraction (HAT) and single electron transfer (SET), is proposed to be involved in the plausible reaction mechanism.
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Affiliation(s)
- Joydev K Laha
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Pankaj Gupta
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Amitava Hazra
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
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23
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Chen C, Ji R, Li W, Lan Y, Guo J. Waste self-heating bag derived iron-based composite with abundant oxygen vacancies for highly efficient Fenton-like degradation of micropollutants. CHEMOSPHERE 2023; 326:138499. [PMID: 36963587 DOI: 10.1016/j.chemosphere.2023.138499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 03/18/2023] [Accepted: 03/21/2023] [Indexed: 06/18/2023]
Abstract
In this study, iron-rich waste self-heating bag was reutilized as the raw material to prepare oxygen vacancies (OV) functionalized iron-based composite (iron oxide (Fe3O4)-carbon-vermiculite, viz. OV-ICV), which exhibited excellent performance in the Fenton-like degradation of micropollutants via peroxydisulfate (PDS) activation. Above 95% of 1.0 mg/L carbaryl (CB) was efficiently eliminated in the presence of 0.1 g/L of OV-ICV and 0.5 mmol/L of PDS over a wide pH range of 3-10 within 30 min. Besides, OV-ICV also showed acceptable adaptability, stability, and renewability. Imbedding OV into Fe3O4 structure significantly generated more active iron sites and localized electrons, promoted the charge transfer ability, and assisted the redox cycle of ≡Fe(III)/≡Fe(II) for PDS activation. Mechanism investigation demonstrated that superoxide radicals (O2•-) derived from the activation of molecular oxygen mediated the generation of H2O2, and both of them further enhanced the formation of more sulfate radicals (SO4•-) and hydroxyl radicals (•OH), which led to the efficient degradation and mineralization of CB. Furthermore, the degradation pathways of CB were proposed based on the intermediates identification. This work lays a foundation for the rational reutilization of iron-containing wastes modified with defect engineering in heterogeneous Fenton-like catalysis for the remediation of micropollutants wastewater.
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Affiliation(s)
- Cheng Chen
- College of Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Runmei Ji
- College of Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China
| | - Wei Li
- China Tobacco Jiangsu Industrial Co., Ltd., Nanjing, 210019, China
| | - Yeqing Lan
- College of Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China.
| | - Jing Guo
- College of Sciences, Nanjing Agricultural University, Nanjing, 210095, PR China.
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24
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Huang P, Zhang P, Wang C, Du X, Jia H, Sun H. P-doped biochar regulates nZVI nanocracks formation for superefficient persulfate activation. JOURNAL OF HAZARDOUS MATERIALS 2023; 450:130999. [PMID: 36848845 DOI: 10.1016/j.jhazmat.2023.130999] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 02/02/2023] [Accepted: 02/11/2023] [Indexed: 06/18/2023]
Abstract
In this study, a novel P-doped biochar loaded with nano zero-valent iron (nZVI) composite (nZVI@P-BC), with abundant nanocracks from inside to outside in nZVI particles, was designed for ultra-efficient persulfate (PS) activation and gamma-hexachlorocyclohexane (γ-HCH) degradation. Results showed that P-doping treatment significantly enhanced specific surface area, hydrophobicity and adsorption capacity of biochar. Systematic characterizations revealed that the additional electrostatic stress and continuously generated multiple new nucleation sites of P-doped biochar were the main mechanism for the formation of nanocracked structure. nZVI@P-BC with KH2PO4 as P precursor showed superefficient PS activation and γ-HCH degradation, by which 92.6 % of 10 mg/L γ-HCH was removed within 10 min using 1.25 g/L catalyst and 4 mM PS, being 10.5-fold greater than that of without P-doping. Electron spin resonance and radical quenching test showed that •OH and 1O2 were the dominant active species, and further revealed that the unique nanocracked nZVI, high adsorption capacity and abundant P sites in nZVI@P-BC enhanced their generation and mediated extra direct surface electron transfer. nZVI@P-BC also exhibited high tolerance to different anions, humic acid and wide pH conditions. This work provides a new strategy and mechanism insight for the rational design of nZVI and diversified application of biochar.
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Affiliation(s)
- Peng Huang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Peng Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China.
| | - Cuiping Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China
| | - Xin Du
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, China
| | - Hanzhong Jia
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, College of Natural Resources and Environment, Northwest A & F University, Yangling, 712100, China
| | - Hongwen Sun
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China.
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25
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Soro DM, Roque JB, Rackl JW, Park B, Payer S, Shi Y, Ruble JC, Kaledin AL, Baik MH, Musaev DG, Sarpong R. Photo- and Metal-Mediated Deconstructive Approaches to Cyclic Aliphatic Amine Diversification. J Am Chem Soc 2023; 145:11245-11257. [PMID: 37171220 DOI: 10.1021/jacs.3c01318] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Described herein are studies toward the core modification of cyclic aliphatic amines using either a riboflavin/photo-irradiation approach or Cu(I) and Ag(I) to mediate the process. Structural remodeling of cyclic amines is explored through oxidative C-N and C-C bond cleavage using peroxydisulfate (persulfate) as an oxidant. Ring-opening reactions to access linear aldehydes or carboxylic acids with flavin-derived photocatalysis or Cu salts, respectively, are demonstrated. A complementary ring-opening process mediated by Ag(I) facilitates decarboxylative Csp3-Csp2 coupling in Minisci-type reactions through a key alkyl radical intermediate. Heterocycle interconversion is demonstrated through the transformation of N-acyl cyclic amines to oxazines using Cu(II) oxidation of the alkyl radical. These transformations are investigated by computation to inform the proposed mechanistic pathways. Computational studies indicate that persulfate mediates oxidation of cyclic amines with concomitant reduction of riboflavin. Persulfate is subsequently reduced by formal hydride transfer from the reduced riboflavin catalyst. Oxidation of the cyclic aliphatic amines with a Cu(I) salt is proposed to be initiated by homolysis of the peroxy bond of persulfate followed by α-HAT from the cyclic amine and radical recombination to form an α-sulfate adduct, which is hydrolyzed to the hemiaminal. Investigation of the pathway to form oxazines indicates a kinetic preference for cyclization over more typical elimination pathways to form olefins through Cu(II) oxidation of alkyl radicals.
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Affiliation(s)
- David M Soro
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Jose B Roque
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Jonas W Rackl
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Bohyun Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Stefan Payer
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Yuan Shi
- Discovery Chemistry Research and Technologies, Eli Lilly and Company, Indianapolis, Indiana 46285, United States
| | - J Craig Ruble
- Discovery Chemistry Research and Technologies, Eli Lilly and Company, Indianapolis, Indiana 46285, United States
| | - Alexey L Kaledin
- Cherry L. Emerson Center for Scientific Computation, and Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Djamaladdin G Musaev
- Cherry L. Emerson Center for Scientific Computation, and Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Richmond Sarpong
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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26
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Shan YD, Wu SH, Wang YL, Wang C, Zhi SQ, Liu Y, Han X. Selective Oxidation of Cyclohexane to Cyclohexanol/Cyclohexanone by Surface Peroxo Species on Cu-Mesoporous TiO 2. Inorg Chem 2023; 62:4872-4882. [PMID: 36916853 DOI: 10.1021/acs.inorgchem.2c04196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Selective oxidation of cyclohexane to cyclohexanol/cyclohexanone (KA-oil) is an important chemical process, which is still constrained by low conversion and selectivity and high energy consumption. In this study, Cu-doped mesoporous TiO2 (Cu-MT) has been successfully synthesized via calcinating MIL-125(Ti) doped with copper acetylacetonate, which shows high reactivity in selective oxidation of cyclohexane to KA-oil by persulfate (PS) with the desirable cyclohexane conversion of 16.8% and a selectivity of 98.0% under mild conditions and the low ratio of PS/cyclohexane of 1:1. A series of characterizations and density functional theory calculations reveal that the doped Cu(I,II) on Cu-MT is the reactive site for non-radical activation of PS with the moderate elongation of the O-O bond in PS, which then abstracts 1H (1H+ + 1e-) from cyclohexane to form Cy• and eventually KA-oil. This study gives new insight on the importance of moderately activated PS in selective oxidation of C-H.
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Affiliation(s)
- Yu-Dong Shan
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P.R. China
| | - Song-Hai Wu
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P.R. China
| | - Yu-Le Wang
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P.R. China
| | - Cong Wang
- Heibei Key Laboratory of Hazardous Chemicals Safety and Control Technology, School of Chemical and Environmental Engineering, North China Institute of Science and Technology, Langfang, Hebei 065201, China
| | - Shao-Qi Zhi
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P.R. China
| | - Yong Liu
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P.R. China
| | - Xu Han
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P.R. China
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27
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Sui K, Leng Y, Wu Y. Synthesis of Difluoroarymethyl-Substituted Benzimidazo[2,1- a]isoquinolin-6(5 H)-ones under Mild Conditions. ACS OMEGA 2023; 8:7517-7528. [PMID: 36872989 PMCID: PMC9979369 DOI: 10.1021/acsomega.2c06689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
A highly efficient method for synthesis of difluoroarymethyl-substituted benzimidazo[2,1-a]isoquinolin-6(5H)-ones using 2-arylbenzoimidazoles with α,α-difluorophenylacetic acid as reaction substrates has been developed through radical cascade cyclization. The advantage of this strategy lies in excellent functional group tolerance to generate the corresponding products in good yields under base- and metal-free conditions.
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28
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Liu W, Wang L, Mu H, Zhang Q, Fang Z, Li D. Synthesis of cyano-substituted γ-lactams through a copper-catalyzed cascade cyclization/cyanation reaction. Org Biomol Chem 2023; 21:1168-1171. [PMID: 36647817 DOI: 10.1039/d2ob02086f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A convenient copper-catalyzed cascade cyclization/cyanation reaction for the construction of cyano-containing γ-lactams was developed. The protocol employed TMSCN as the cyano source and proceeded in water under simple conditions. Mechanistic studies indicated this reaction involved an amidyl radical initiated cascade 5-exo-trig cyclization/cyanation process. It is capable of generating a series of cyano-substituted γ-lactams and relative 2-oxazolidinone derivatives with a broad substrate scope.
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Affiliation(s)
- Wen Liu
- New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China.
| | - Liang Wang
- New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China.
| | - Haiping Mu
- Hubei Kecy Chemical Co., Ltd, Qianjiang 433132, China
| | - Qian Zhang
- New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China.
| | - Zeguo Fang
- New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China.
| | - Dong Li
- New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, China.
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29
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Reddy RJ, Kumari AH, Krishna GR. Unified Radical Sulfonylative-Annulation of 1,6-Enynols with Sodium Sulfinates: A Modular Synthesis of 2,3-Disubstituted Benzoheteroles. J Org Chem 2023; 88:1635-1648. [PMID: 36650618 DOI: 10.1021/acs.joc.2c02696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Benzoheteroles are valuable scaffolds in medicinal chemistry, but the direct synthesis of 3-vinyl benzoheterole analogues remains unexplored. A rationally designed new class of 1,6-enyne-containing propargylic alcohols has been prepared for the modular synthesis of 3-alkenyl benzoheteroles. Ag-catalyzed cascade radical sulfonylative-cycloannulation of 1,6-enynols with sodium sulfinates is realized to access a wide variety of 2,3-disubstituted benzoheteroles in good to high yields. Moreover, a three-component coupling of 1,6-enynols, aryldiazonium salts, and Na2S2O5 (as an SO2 surrogate) has been achieved to deliver benzoheterole derivatives in moderate to good yields. Of note, a scalable reaction and late-stage synthetic transformations were successfully demonstrated. A plausible mechanism is also presented based on the existing experimental results and control experiments.
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Affiliation(s)
- Raju Jannapu Reddy
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India
| | - Arram Haritha Kumari
- Department of Chemistry, University College of Science, Osmania University, Hyderabad 500 007, India
| | - Gamidi Rama Krishna
- Centre for X-ray Crystallography, CSIR-National Chemical Laboratory, Pune 411 008, India
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30
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K. Laha J, Manral N, Badoni S, Kaur Hunjan M, Gulati U. Sulfate Radical Anion (SO4˙ˉ) Mediated Degradation of Some Over-the-Counter Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) at Neutral Ph in Aqueous Environment. HETEROCYCLES 2023. [DOI: 10.3987/com-23-14804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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31
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Wang C, Song S, Chen Z, Shen D, Wang Z, Zhou J, Guo J, Li J. Phototriggered Self-Catalyzed Three-Component Minisci Reaction: A Route to β-C(sp 3) Heteroarylated Alcohols/Ethers. J Org Chem 2022; 87:16794-16806. [PMID: 36427193 DOI: 10.1021/acs.joc.2c02498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Herein, a visible-light-triggered photocatalyst-free radical cascade Minisci reaction of heteroarenes, alkenes, and water/alcohols to obtain diverse β-C(sp3) heteroarylated alcohols/ethers has been developed. Achieved under mild and simple conditions, this protocol is scalable and features broad substrate scope and functional group tolerance. Mechanistic studies demonstrate that the heteroarene can be served as a photocatalyst to engage single-electron transfer with persulfate.
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Affiliation(s)
- Chaodong Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Shengjie Song
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Zhi Chen
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Dengjian Shen
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Zhenhui Wang
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Jiadi Zhou
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, P. R. China
| | - Jingjing Guo
- School of Medicine and Pharmaceutical Engineering, Taizhou Vocational and Technical College, Taizhou 318000, P. R. China
| | - Jianjun Li
- College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, P. R. China.,Taizhou Key Laboratory of Advanced Manufacturing Technology, Taizhou Research Institute, Zhejiang University of Technology, Taizhou 318000, P. R. China
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32
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Abdelbasset WK, Sultan MQ, Alkaim AF, Abdullaevich Ashurov T, Altimari US, Hussein BA, Mustafa YF, Hammid AT. Intramolecular Cascade C–S Bond Formation: A Safe and New Strategy for the Synthesis of Riluzole Analogues Catalyzed by K 2S 2O 8. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2143826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Walid Kamal Abdelbasset
- Department of Health and Rehabilitation Sciences, College of Applied Medical Sciences, Prince Sattam Bin Abdulaziz University, Al Kharj, Saudi Arabia
- Department of Physical Therapy, Kasr Al-Aini Hospital, Cairo University, Giza, Egypt
| | | | - Ayad F. Alkaim
- Chemistry Department, College of Science for Women, Iraq
| | | | | | | | - Yasser Fakri Mustafa
- Department of Pharmaceutical Chemistry, College of Pharmacy, University of Mosul, Mosul, Iraq
| | - Ali Thaeer Hammid
- Computer Engineering Department, Imam Ja’afar Al-Sadiq University, Baghdad, Iraq
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33
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Hosseini S, Janusz JN, Tanwar M, Pendergast AD, Neurock M, White HS. Oxidation by Reduction: Efficient and Selective Oxidation of Alcohols by the Electrocatalytic Reduction of Peroxydisulfate. J Am Chem Soc 2022; 144:21103-21115. [DOI: 10.1021/jacs.2c07305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Seyyedamirhossein Hosseini
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah84112, United States
| | - Jordyn N. Janusz
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah84112, United States
| | - Mayank Tanwar
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota55455, United States
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota55455, United States
| | - Andrew D. Pendergast
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah84112, United States
| | - Matthew Neurock
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota55455, United States
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota55455, United States
| | - Henry S. White
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah84112, United States
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34
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Ding Y, Yu S, Ren M, Lu J, Fu Q, Zhang Z, Wang Q, Bai J, Hao N, Yang L, Wei S, Yi D, Wei J. Redox-neutral and metal-free synthesis of 3-(arylmethyl)chroman-4-ones via visible-light-driven alkene acylarylation. Front Chem 2022; 10:1059792. [PMID: 36385990 PMCID: PMC9660241 DOI: 10.3389/fchem.2022.1059792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 10/18/2022] [Indexed: 11/10/2023] Open
Abstract
A metal- and aldehyde-free visible-light-driven photoredox-neutral alkene acylarylation with readily available cyanoarenes is described. A variety of 3-(arylmethyl)chroman-4-ones (i.e., homoisoflavonoids) and analogs are efficiently synthesized with good functional group tolerance. This mild protocol relies on a phosphoranyl radical-mediated acyl radical-initiated cyclization and selective radical-radical coupling sequence, and is also further highlighted by subsequent derivatization to chromone and 2H-chromene as well as its application in the three-component alkene acylarylation.
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Affiliation(s)
- Yan Ding
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Shengjiao Yu
- Department of Chemistry, School of Basic Medical Sciences, Southwest Medical University, Luzhou, China
| | - Man Ren
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Ji Lu
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Qiang Fu
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Zhijie Zhang
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Qin Wang
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Jun Bai
- School of Public Health, Southwest Medical University, Luzhou, China
| | - Na Hao
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Lin Yang
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Siping Wei
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Dong Yi
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Jun Wei
- Central Nervous System Drug Key Laboratory of Sichuan Province, Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou, China
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35
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Lin X, Huang S, Huang M, Wang C, Peng C, Liu H, Wu Y. Revisiting the synthesis of bis(2‐hydroxy‐3,5‐di‐
t
‐butylphenyl)methanone. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xin‐Jie Lin
- Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu Taiwan
| | - Shih‐Peng Huang
- Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu Taiwan
| | - Min‐Jie Huang
- Department of Products Taiwan Textile Research Institute New Taipei City Taiwan
| | - Chien‐Lung Wang
- Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu Taiwan
| | - Chi‐How Peng
- Department of Chemistry National Taiwan University Taipei Taiwan
| | - Hsueh‐Ju Liu
- Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu Taiwan
| | - Yen‐Ku Wu
- Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu Taiwan
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36
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Shen BR, Annamalai P, Bai R, Badsara SS, Lee CF. Blue LED-Mediated Syntheses of Arylazo Phosphine Oxides and Phosphonates via N-P Bond Formation. Org Lett 2022; 24:5988-5993. [PMID: 35926085 DOI: 10.1021/acs.orglett.2c02251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The synthesis of (E)-diphenyl(aryldiazenyl)phosphine oxides and dialkyl (E)-(aryldiazenyl)phosphonates via visible light-mediated N-P bond formation between diazo species and phosphine oxides and phosphite derivatives, respectively, is described. The diazo species were generated via the reaction of aniline with isoamyl nitrite, which upon reaction with phosphorus surrogates generated arylazophosphine oxides and arylazo phosphonates in good to excellent yields. This sustainable chemical process offers a broad substrate scope and reasonably viable product formation.
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Affiliation(s)
- Bo-Ru Shen
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, ROC
| | | | - Rekha Bai
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, ROC
| | - Satpal Singh Badsara
- MFOS Laboratory, Department of Chemistry, University of Rajasthan, JLN, Marg, Jaipur, Rajasthan 302004, India
| | - Chin-Fa Lee
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, ROC.,i-Center for Advanced Science and Technology (iCAST), National Chung Hsing University, Taichung 402, Taiwan, ROC.,Innovation and Development Center of Sustainable Agriculture (IDCSA), National Chung Hsing University, Taichung 402, Taiwan, ROC
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37
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Corpas J, Kim-Lee SH, Mauleón P, Arrayás RG, Carretero JC. Beyond classical sulfone chemistry: metal- and photocatalytic approaches for C-S bond functionalization of sulfones. Chem Soc Rev 2022; 51:6774-6823. [PMID: 35838659 DOI: 10.1039/d0cs00535e] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The exceptional versatility of sulfones has been extensively exploited in organic synthesis across several decades. Since the first demonstration in 2005 that sulfones can participate in Pd-catalysed Suzuki-Miyaura type reactions, tremendous advances in catalytic desulfitative functionalizations have opened a new area of research with burgeoning activity in recent years. This emerging field is displaying sulfone derivatives as a new class of substrates enabling catalytic C-C and C-X bond construction. In this review, we will discuss new facets of sulfone reactivity toward further expanding the flexibility of C-S bonds, with an emphasis on key mechanistic features. The inherent challenges confronting the development of these strategies will be presented, along with the potential application of this chemistry for the synthesis of natural products. Taken together, this knowledge should stimulate impactful improvements on the use of sulfones in catalytic desulfitative C-C and C-X bond formation. A main goal of this article is to bring this technology to the mainstream catalysis practice and to serve as inspiration for new perspectives in catalytic transformations.
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Affiliation(s)
- Javier Corpas
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain.
| | - Shin-Ho Kim-Lee
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain.
| | - Pablo Mauleón
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain. .,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain, and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain
| | - Ramón Gómez Arrayás
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain. .,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain, and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain
| | - Juan C Carretero
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain. .,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Cantoblanco 28049 Madrid, Spain, and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Spain
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38
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Ritter-type amination of C(sp 3)-H bonds enabled by electrochemistry with SO 42. Nat Commun 2022; 13:4138. [PMID: 35842447 PMCID: PMC9288499 DOI: 10.1038/s41467-022-31813-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 06/30/2022] [Indexed: 11/09/2022] Open
Abstract
By merging electricity with sulfate, the Ritter-type amination of C(sp3)-H bonds is developed in an undivided cell under room temperature. This method features broad substrate generality (71 examples, up to 93% yields), high functional-group compatibility, facile scalability, excellent site-selectivity and mild conditions. Common alkanes and electron-deficient alkylbenzenes are viable substrates. It also provides a straightforward protocol for incorporating C-deuterated acetylamino group into C(sp3)-H sites. Application in the synthesis or modification of pharmaceuticals or their derivatives and gram-scale synthesis demonstrate the practicability of this method. Mechanistic experiments show that sulfate radical anion, formed by electrolysis of sulfate, served as hydrogen atom transfer agent to provide alkyl radical intermediate. This method paves a convenient and flexible pathway for realizing various synthetically useful transformations of C(sp3)-H bonds mediated by sulfate radical anion generated via electrochemistry. The amination of C(sp3)–H bonds is an appealing and challenging task in organic synthesis. Here, by using an electrogenerated sulfate radical an HAT agent, the authors report a practical Ritter-type amination of C(sp3)–H bonds.
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39
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Natarajan P, Priya, Chuskit D. Persulfate-nitrogen doped graphene mixture as an oxidant for the synthesis of 3-nitro-4-aryl-2 H-chromen-2-ones from aryl alkynoate esters and nitrite. Org Biomol Chem 2022; 20:4616-4624. [PMID: 35608321 DOI: 10.1039/d2ob00827k] [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 series of 3-nitro-4-aryl-2H-chromen-2-ones in good yields have directly been obtained from aryl alkynoate esters and nitrite by employing a mixture of K2S2O8-nitrogen doped graphene as an oxidant in a watery medium at room temperature. A plausible mechanism for the reaction is also reported. It reveals that the product is formed through a cascade of nitro radical addition, spirocyclization, and ester migration. When compared to known methods for the synthesis of 3-nitro-4-aryl-2H-chromen-2-ones from aryl alkynoate esters, this protocol is environmentally friendly, sustainable, practical and energy efficient and does not use a harmful nitro source. Furthermore, nitrogen doped graphene used in this approach can be easily recovered and reused at least four times without losing its activity.
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Affiliation(s)
- Palani Natarajan
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh - 160 014, India.
| | - Priya
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh - 160 014, India.
| | - Deachen Chuskit
- Department of Chemistry & Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh - 160 014, India.
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40
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Shen C, Li Y, Li Y, Wang S, Li Y, Tang F, Wang P, Liu H, Li Y, Liu Q. A double reaction system induced electrochemiluminescence enhancement based on SnS 2 QDs@MIL-101 for ultrasensitive detection of CA242. Talanta 2022; 247:123575. [PMID: 35623248 DOI: 10.1016/j.talanta.2022.123575] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/15/2022] [Accepted: 05/18/2022] [Indexed: 11/26/2022]
Abstract
At present, the development of electrochemiluminescence (ECL) immunosensor with excellent performance is still the research focus of immunoassay and detection. Herein, SnS2 quantum dots (SnS2 QDs) and metal-organic framework (MIL-101 (Cr)) are effectively combined to achieve synergistic signal amplification based on K2S2O8 co-reactant, thereby constructing SnS2 QDs/SO4•- and SO4•-/O2 ECL double reaction luminous systems. SnS2 QDs and singlet oxygen (1(O2)2*) produced from the system as light-emitting devices jointly enhance the ECL response and significantly improve the sensitivity of the ECL immunosensor. Dissolved oxygen and SnS2 QDs respectively generate HOO• and SnS2 QDs•- under negative potential, and react with transient SO4•- to emit strong light respectively, so as to jointly enhance the ECL response. MIL-101 catalyzes the oxygen cathode reduction reaction to promote the conversion of dissolved oxygen into HOO•, which greatly improves the ECL response of 1(O2)2*. CuS with spherical nanoflower-like form as a co-reaction promoter of K2S2O8 generate more SO4•- active substances, which further enhance the ECL response of the immunosensor. The constructed ECL immunosensor has the advantages of low detection limit, high sensitivity and better stability. Under the optimal conditions, the detection range is 0.1 mU/mL∼100 U/mL, and the detection limit is 0.015 mU/mL. The results show that the constructed ECL immunosensor can detect human CA242 samples and have a broad application prospect in biological analysis and early diagnosis of diseases.
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Affiliation(s)
- Chaoqun Shen
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, PR China
| | - Yang Li
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, PR China
| | - Yamei Li
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, PR China
| | - Shujun Wang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, PR China
| | - Yueyuan Li
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, PR China
| | - Feng Tang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, PR China
| | - Ping Wang
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, PR China
| | - Hui Liu
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, PR China
| | - Yueyun Li
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, PR China
| | - Qing Liu
- School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, PR China.
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41
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Mazodze CM, Petersen WF. Silver-catalysed double decarboxylative addition-cyclisation-elimination cascade sequence for the synthesis of quinolin-2-ones. Org Biomol Chem 2022; 20:3469-3474. [PMID: 35420621 DOI: 10.1039/d2ob00521b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
An atom-efficient silver-catalysed double carboxylative strategy for the one-step synthesis of quinolin-2-ones via an addition-cyclisation-elimination cascade sequence of oxamic acids to acrylic acids, mediated either thermally or photochemically, is reported. The reaction was applicable to the synthesis of a broad range of quinolin-2-ones and featured a double-disconnection approach that constructed the quinolin-2-one core via the formal and direct addition of a C(sp2)-H/C(sp2)-H olefin moiety to a phenylformamide precursor.
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Affiliation(s)
- C Munashe Mazodze
- Department of Chemistry, University of Cape Town, Rondebosch, Cape Town, 7700, South Africa.
| | - Wade F Petersen
- Department of Chemistry, University of Cape Town, Rondebosch, Cape Town, 7700, South Africa.
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42
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Zheng YN, Liu Y, Cai XE, Wu HL, Huang XJ, Liu Y, Wei WT. Ring‐opening/cyclization of cyclobutanone oxime esters with alkenes in biomass‐derived solvent using copper catalyst and inorganic oxidant. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yan-Nan Zheng
- Ningbo University School of Materials Science and Chemical Engineering 315211 Ningbo CHINA
| | - Yi Liu
- Ningbo University School of Materials Science and Chemical Engineering 315211 Ningbo CHINA
| | - Xue-Er Cai
- Ningbo University School of Materials Science and Chemical Engineering 315211 Ningbo CHINA
| | - Hong-Li Wu
- Ningbo University School of Materials Science and Chemical Engineering 315211 Ningbo CHINA
| | - Xun-Jie Huang
- Ningbo University School of Materials Science and Chemical Engineering 315211 Ningbo CHINA
| | - Yilin Liu
- Huaihua University College of Chemistry and Materials Engineering 418008 Huaihua CHINA
| | - Wen-Ting Wei
- Ningbo University Materials Science and Chemical Engineering 818, Fenghua Road, Jiangbei District 315211 Ningbo CHINA
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43
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Saha S, Bagdi AK. Visible light-promoted photocatalyst-free activation of persulfates: a promising strategy for C-H functionalization reactions. Org Biomol Chem 2022; 20:3249-3262. [PMID: 35363233 DOI: 10.1039/d2ob00109h] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The employment of renewable energy resources is highly desirable according to the twelve principles of green chemistry. In this context, visible light promoted organic transformations have gained much attention from synthetic chemists due to the employment of renewable energy. However, the inability of the majority of organic molecules to absorb visible light encouraged the use of photocatalysts in visible light-mediated organic transformations. As a result, different types of photocatalysts like transition-metal containing photoredox catalysts, organophotoredox catalysts, heterogeneous photocatalysts, etc. have emerged over the years. On the other hand, persulphates (K2S2O8, Na2S2O8, and (NH4)2S2O8) have been widely used as oxidants in various oxidative organic transformations under thermal and photochemical conditions. The initial formation of an active persulfate radical anion from a persulfate anion is the crucial step for these oxidative transformations and the conversions under visible light are generally carried out employing different photocatalysts. Although numerous methodologies have been successfully developed employing these photocatalysts, the development of new processes under photocatalyst-free conditions are more preferable from the viewpoint of sustainable development. Persulphates could be very useful for various organic transformations through C-H functionalizations under photocatalyst-free visible light irradiation. In this review, we will exemplify the efficiency of persulphates in various oxidative organic transformations under visible light irradiation without the employment of any photocatalysts. The utilities and mechanistic pathways of the methodologies will also be highlighted.
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Affiliation(s)
- Sudipta Saha
- Department of Chemistry, Triveni Devi Bhalotia College (UG+PG), Raniganj, WB-713347, India.
| | - Avik Kumar Bagdi
- Department of Chemistry, University of Kalyani, Kalyani, WB-741235, India
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44
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Tyagi S, McKillican BP, Salvador TK, Gichinga MG, Eberle WJ, Viner R, Makaravage KJ, Johnson TS, Russell CA, Roy S. Bioinspired Synthesis of Pinoxaden Metabolites Using a Site-Selective C-H Oxidation Strategy. J Org Chem 2022; 87:6202-6211. [PMID: 35442682 DOI: 10.1021/acs.joc.2c00440] [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
A bioinspired synthesis of Pinoxaden metabolites 2-5 is described herein. A site-selective C-H oxidation strategy validated by density functional theory (DFT) calculations was devised for preparing metabolites 2-4. Oxidation of the benzylic C-H bond in tertiary alcohol 7 using K2S2O8 and catalytic AgNO3 formed the desired metabolite 2 that enabled access to metabolites 3 and 4 in a single step. Unlike most metal/persulfate-catalyzed transformations reported for the C-C and C-O bond formation reactions wherein the metal acts as a catalyst, we propose that Ag(I)/K2S2O8 plays the role of an initiator in the oxidation of intermediate 7 to 2. Metabolite 2 was subjected to a ruthenium tetroxide-mediated C-H oxidation to form metabolites 3 and 4 as a mixture that were purified to isolate pure standards of these metabolites. Metabolite 5 was synthesized from readily available advanced intermediate 9 via a House-Meinwald-type rearrangement in one step using a base.
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Affiliation(s)
- Sameer Tyagi
- Product Metabolism Analytical Sciences, Syngenta Group, 410 Swing Road, Greensboro, North Carolina 27409, United States
| | - Bruce P McKillican
- Product Metabolism Analytical Sciences, Syngenta Group, 410 Swing Road, Greensboro, North Carolina 27409, United States
| | - Tolani K Salvador
- Product Metabolism Analytical Sciences, Syngenta Group, 410 Swing Road, Greensboro, North Carolina 27409, United States
| | - Moses G Gichinga
- Product Metabolism Analytical Sciences, Syngenta Group, 410 Swing Road, Greensboro, North Carolina 27409, United States
| | - William J Eberle
- Product Metabolism Analytical Sciences, Syngenta Group, 410 Swing Road, Greensboro, North Carolina 27409, United States
| | - Russell Viner
- Research Chemistry, Syngenta Group, Jealott's Hill International Research Center, Bracknell, Berkshire RG 42 6EY, United Kingdom
| | - Katarina J Makaravage
- Product Metabolism Analytical Sciences, Syngenta Group, 410 Swing Road, Greensboro, North Carolina 27409, United States
| | - Trey S Johnson
- Product Metabolism Analytical Sciences, Syngenta Group, 410 Swing Road, Greensboro, North Carolina 27409, United States
| | - C Adam Russell
- Product Metabolism Analytical Sciences, Syngenta Group, Jealott's Hill International Research Center, Bracknell, Berkshire RG 42 6EY, United Kingdom
| | - Subho Roy
- TCG Lifesciences, Chembiotek, Block BN, Plot 7, Salt Lake Electronics Complex, Sector V, Kolkata 700091, West Bengal, India
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45
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Purtsas A, Rosenkranz M, Dmitrieva E, Kataeva O, Knölker H. Iron-Catalyzed Oxidative C-O and C-N Coupling Reactions Using Air as Sole Oxidant. Chemistry 2022; 28:e202104292. [PMID: 35179270 PMCID: PMC9314016 DOI: 10.1002/chem.202104292] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Indexed: 01/31/2023]
Abstract
We describe the oxygenation of tertiary arylamines, and the amination of tertiary arylamines and phenols. The key step of these coupling reactions is an iron-catalyzed oxidative C-O or C-N bond formation which generally provides the corresponding products in high yields and with excellent regioselectivity. The transformations are accomplished using hexadecafluorophthalocyanine-iron(II) (FePcF16 ) as catalyst in the presence of an acid or a base additive and require only ambient air as sole oxidant.
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Affiliation(s)
- Alexander Purtsas
- Fakultät ChemieTechnische Universität DresdenBergstraße 6601069DresdenGermany
| | - Marco Rosenkranz
- Center of SpectroelectrochemistryLeibniz Institute for Solid State and Materials Research (IFW) DresdenHelmholtzstraße 2001069DresdenGermany
| | - Evgenia Dmitrieva
- Center of SpectroelectrochemistryLeibniz Institute for Solid State and Materials Research (IFW) DresdenHelmholtzstraße 2001069DresdenGermany
| | - Olga Kataeva
- A. E. Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of SciencesArbuzov Str. 8Kazan420088Russia
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46
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Kouznetsov VV, Peñaranda Gómez A, Puerto Galvis CE, Macías MA, Ochoa-Puentes C. I2/DMSO-Promoted Synthesis of Chromeno[4,3-b]quinolines through an Imine Formation/Aza-Diels–Alder/Aromatization Tandem Reaction under Metal-Catalyst- and Photosensitizer-Free Conditions. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1638-5030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractA tandem approach was developed for the efficient synthesis of substituted chromeno[4,3-b]quinolines from arylamines and O-cinnamyl salicylaldehydes under metal-catalyst- and photosensitizer-free reaction conditions. Our protocol is based on an inexpensive I2/DMSO system in which molecular iodine first acts as a Lewis acid to promote the formation of the corresponding imine bearing the alkene moiety; then, this species fulfills a second role by catalyzing an intramolecular aza-Diels–Alder cycloaddition to generate the respective tetrahydrochromenoquinoline as an intermediate. Finally, the dual behavior of DMSO as an oxidant and as a solvent proved crucial at this stage, allowing the regeneration of I2 and promoting the aromatization of the tetrahydrochromenoquinoline intermediates to yield the desired 7-aryl-6H-chromeno[4,3-b]quinolines. This protocol is mild and easy to perform, features high step-economy (tandem process) and provides a new access to biologically important nitrogen- and oxygen-containing heterocyclic molecules.
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Affiliation(s)
- Vladimir V. Kouznetsov
- Laboratorio de Química Orgánica y Biomolecular, CMN, Universidad Industrial de Santander
| | | | | | - Mario A. Macías
- Crystallography and Chemistry of Materials, CrisQuimMat, Department of Chemistry, Universidad de los Andes
| | - Cristian Ochoa-Puentes
- Laboratorio de Síntesis Orgánica Sostenible, Departamento de Química, Universidad Nacional de Colombia–Sede Bogotá
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47
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Tan Z, He X, Xu K, Zeng C. Electrophotocatalytic C-H Functionalization of N-Heteroarenes with Unactivated Alkanes under External Oxidant-Free Conditions. CHEMSUSCHEM 2022; 15:e202102360. [PMID: 34967138 DOI: 10.1002/cssc.202102360] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/29/2021] [Indexed: 06/14/2023]
Abstract
The Minisci alkylation of N-heteroarenes with unactivated alkanes under external oxidant-free conditions provides an economically attractive route to access alkylated N-heteroarenes but remains underdeveloped. Herein, a new electrophotocatalytic strategy to access alkyl radicals from strong C(sp3 )-H bonds was reported for the following Minisci alkylation reactions in the absence of chemical oxidants. This strategy realized the first example of cerium-catalyzed Minisci alkylation reaction directly from abundant unactivated alkanes with excellent atom economy. It is anticipated that the general design principle would enrich catalytic strategies to explore the functionalizations of strong C(sp3 )-H bonds under external oxidant-free conditions with H2 evolution.
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Affiliation(s)
- Zhoumei Tan
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P.R. China
| | - Xinrui He
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P.R. China
| | - Kun Xu
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P.R. China
| | - Chengchu Zeng
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P.R. China
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48
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Zhu Z, Tang H, Du Y, Wei Y, Chen Y, Yang W, Zhang D, Li Z, Liu C. Filter‐membrane treatment of continuous‐flow tetracycline through photocatalysis‐assisted peroxydisulfate oxidation. AIChE J 2022. [DOI: 10.1002/aic.17654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zuoyan Zhu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering Hunan University Changsha P. R. China
| | - Haifang Tang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering Hunan University Changsha P. R. China
- College of Materials Science and Engineering Hunan University Changsha P. R. China
| | - Yi Du
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering Hunan University Changsha P. R. China
- College of Chemistry and Chemical Engineering Anshun University Anshun P. R. China
| | - Yuanfeng Wei
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering Hunan University Changsha P. R. China
| | - Yuqing Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering Hunan University Changsha P. R. China
| | - Weijian Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering Hunan University Changsha P. R. China
| | - Danyu Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering Hunan University Changsha P. R. China
| | - Ziru Li
- College of Materials Science and Engineering Hunan University Changsha P. R. China
| | - Chengbin Liu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering Hunan University Changsha P. R. China
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49
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Rastogi GK, Deka B, Deb ML, Baruah PK. Iodine‐DMSO‐promoted Oxygenation of Indoles: Synthesis of Isatin and Isoindigo. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100757] [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)
- Gaurav K. Rastogi
- Department of Applied Sciences, GUIST Gauhati University Guwahati 781014 Assam India
- Department of Applied Organic Chemistry, CSIR-NEIST Jorhat 785006 Assam India
| | - Bhaskar Deka
- Department of Applied Sciences, GUIST Gauhati University Guwahati 781014 Assam India
| | - Mohit L. Deb
- Department of Applied Sciences, GUIST Gauhati University Guwahati 781014 Assam India
| | - Pranjal K. Baruah
- Department of Applied Sciences, GUIST Gauhati University Guwahati 781014 Assam India
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50
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Dai P, Li Y, Chen Y, Jiao J, Wang Q, Li C, Gu Y, Zhang Y, Xia Q, Zhang WH. (Fluoromethylsulfonyl)methylation of Quinoxalinones Using NaSO2CH2F for C–F Bond Cleavage. Org Lett 2022; 24:1357-1361. [DOI: 10.1021/acs.orglett.2c00048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peng Dai
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yufei Li
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yu Chen
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jian Jiao
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Qingqing Wang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Chenxiao Li
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yucheng Gu
- Syngenta Jealott’s Hill International Research Centre, Bracknell RG42 6EY, U.K
| | - Yanbin Zhang
- Department of Chemistry, National University of Singapore, 117545 Singapore
| | - Qing Xia
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
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