1
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Long L, Li X, Huang Z, Yu Z, Yu D, Luo W, Qiao L, Chen Z, Wang ZX. Hypervalent Iodine Promoted Selective [2 + 2 + 1] Cycloaddition of Aromatic Ketones and Methylamines: A One-Pot Access to 1-Pyrrolines. J Org Chem 2024; 89:9958-9971. [PMID: 38981120 DOI: 10.1021/acs.joc.4c00830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
Herein, a versatile highly regioselective three-component annulation of simple aromatic ketones and methylamines using a hypervalent iodine reagent for polyarylated 1-pyrrolines has been described in good to excellent yields. Meanwhile, unsymmetrical 1-pyrroline isomers could be realized and synthesized. Such an intriguing one-pot two-step tandem assembly strategy with green conditions and high regioselectivity shows predictable inspiration in related annulation reactions.
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Affiliation(s)
- Lipeng Long
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Xin Li
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Ziwen Huang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Ziyi Yu
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Daohong Yu
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Wenjun Luo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Liang Qiao
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Zhengwang Chen
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
| | - Zhong-Xia Wang
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University, Ganzhou 341000, China
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2
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Kumar P, Bhalla A. Reaction Pattern and Mechanistic Aspects of Iodine and Iodine-Based Reagents in Selenylation of Aliphatic, Aromatic, and (Hetero)Cyclic Systems. Top Curr Chem (Cham) 2024; 382:12. [PMID: 38589598 DOI: 10.1007/s41061-024-00459-8] [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: 08/17/2023] [Accepted: 03/15/2024] [Indexed: 04/10/2024]
Abstract
Organoselenium compounds have been the subject of extensive research since the discovery of the biologically active compound ebselen. Ebselen has recently been found to show activity against the main protease of the virus responsible for COVID-19. Other organoselenium compounds are also well-known for their diverse biological activities, with such compounds exhibiting interesting physical properties relevant to the fields of electronics, materials, and polymer chemistry. In addition, the incorporation of selenium into various organic molecules has garnered significant attention due to the potential of selenium to enhance the biological activity of these molecules, particularly in conjunction with bioactive heterocycles. Iodine and iodine-based reagents play a prominent role in the synthesis of organoselenium compounds, being valued for their cost-effectiveness, non-toxicity, and ease of handling. These reagents efficiently selenylate a broad range of organic substrates, encompassing alkenes, alkynes, and cyclic, aromatic, and heterocyclic molecules. They serve as catalysts, additives, inducers, and oxidizing agents, facilitating the introduction of different functional groups at alternate positions in the molecules, thereby allowing for regioselective and stereoselective approaches. Specific iodine reagents and their combinations can be tailored to follow the desired reaction pathways. Here, we present a comprehensive review of the progress in the selenylation of organic molecules using iodine reagents over the past decade, with a focus on reaction patterns, solvent effects, heating, microwave, and ultrasonic conditions. Detailed discussions on mechanistic aspects, such as electrophilic, nucleophilic, radical, electrochemical, and ring expansion reactions via selenylation, multiselenylation, and difunctionalization, are included. The review also highlights the formation of various cyclic, heterocyclic, and heteroarenes resulting from the in situ generation of selenium intermediates, encompassing cyclic ketones, cyclic ethers, cyclic lactones, selenophenes, chromones, pyrazolines, pyrrolidines, piperidines, indolines, oxazolines, isooxazolines, lactones, dihydrofurans, and isoxazolidines. To enhance the reader's interest, the review is structured into different sections covering the selenylation of aliphatic sp2/sp carbon and cyclic sp2 carbon, and then is further subdivided into various heterocyclic molecules.
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Affiliation(s)
- Pankaj Kumar
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, UT, 160014, India
| | - Aman Bhalla
- Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, UT, 160014, India.
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3
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Wan Y, Adda AK, Qian J, Vaccaro DA, He P, Li G, Norton JR. Hydrogen Atom Transfer (HAT)-Mediated Remote Desaturation Enabled by Fe/Cr-H Cooperative Catalysis. J Am Chem Soc 2024; 146:4795-4802. [PMID: 38329998 DOI: 10.1021/jacs.3c13085] [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
An iron/chromium system (Fe(OAc)2, CpCr(CO)3H) catalyzes the preparation of β,γ- or γ,δ-unsaturated amides from 1,4,2-dioxazol-5-ones. An acyl nitrenoid iron complex seems likely to be responsible for C-H activation. A cascade of three H• transfer steps appears to be involved: (i) the abstraction of H• from a remote C-H bond by the nitrenoid N, (ii) the transfer of H• from Cr to N, and (iii) the abstraction of H• from a radical substituent by the Cr•. The observed kinetic isotope effects are consistent with the proposed mechanism if nitrenoid formation is the rate-determining step. The Fe/Cr catalysts can also desaturate substituted 1,4,2-dioxazol-5-ones to 3,5-dienamides.
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Affiliation(s)
- Yanjun Wan
- Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322, United States
| | - Augustine K Adda
- Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
| | - Jin Qian
- Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
| | - David A Vaccaro
- Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
| | - Peixian He
- Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
| | - Gang Li
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322, United States
| | - Jack R Norton
- Department of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
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Barańska I, Dobrzańska L, Rafiński Z. Enantioselective [3 + 3] Annulation-Deoxalation Strategy for Rapid Access to δ-Oxoesters via N-Heterocyclic Carbene Catalysis. Org Lett 2024; 26:1207-1211. [PMID: 38325001 PMCID: PMC10877609 DOI: 10.1021/acs.orglett.3c04397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 01/31/2024] [Accepted: 02/06/2024] [Indexed: 02/09/2024]
Abstract
A new and unprecedented stereoselective synthetic approach to δ-oxoesters derivatives from readily available starting materials has been developed. This method, catalyzed by N-heterocyclic carbene, involves an annulation-deoxalation reaction of alkynyl aldehydes with 2,4-diketoesters and proceeds via the chiral α,β-unsaturated acylazolium intermediates. The annulation includes the in situ formation of dihydropyranones, which undergo ring-opening methanolysis with Lewis acid activation, followed by deoxalation to afford chiral 1,5-ketoesters in moderate to good yields.
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Affiliation(s)
- Izabela Barańska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, 7 Gagarin Street, 87-100 Torun, Poland
| | - Liliana Dobrzańska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, 7 Gagarin Street, 87-100 Torun, Poland
| | - Zbigniew Rafiński
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, 7 Gagarin Street, 87-100 Torun, Poland
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5
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Tomer H, Goswami B, Modak P, Alam MJ, Ahmad S, Antony B. Low-Energy Electron Scattering from Pyrrole and Its Isomers. J Phys Chem A 2023. [PMID: 38037339 DOI: 10.1021/acs.jpca.3c05074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Low-energy electron scattering from pyrrole and its isomers, such as 2-H pyrrole, cyclopropanecarbonitrile, and Z-2 butenenitrile, is explored in detail in this article. The electron interaction with the target molecules was studied through R-matrix theory. We have used minimal STO-3G and advanced DZP basis sets on a fine energy grid from 0.1 to 12 eV electron energy in the calculation. The properties of the STO-3G and DZP-based targets, such as their ionization energy, polarizability, dipole moment, rotational constant, principal moment of inertia, ground-state energy, and orbital energies, were investigated and compared to previously reported data. The elastic and inelastic channels showed the appearance of shape and Feshbach resonances for pyrrole and its isomers. The ultralow-energy region resonance was observed for Z-2 butenenitrile at 0.47 eV. With STO-3G and DZP basis sets, we estimated elastic, excitation, and momentum-transfer cross sections. The differential cross section for the present polar molecules was studied at 5 eV. The dissociative electron attachment channel for pyrrole and its isomers was studied for the pyrrolide anion. The data presented here will be helpful in astrophysical, astrochemical, atmospheric, and low-energy plasma modeling due to the presence of pyrrole and its isomers and the pyrrolide anion in the celestial bodies. The estimated data are also helpful in the biomedical field, radiation therapy, and pharmaceuticals.
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Affiliation(s)
- Himani Tomer
- Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India
| | - Biplab Goswami
- Department of Physics, Indian Institute of Technology Patna, Patna 801103, India
| | - Paresh Modak
- Department of Physics, Kansas State University, Manhattam, Kansas 66506, United States
| | | | - Shabbir Ahmad
- Department of Physics, Aligarh Muslim University, Aligarh 202002, India
| | - Bobby Antony
- Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India
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6
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Arulmozhi S, Sasikumar G, Subramani A, Mohammed MKA, Ali SJA, Ponnusamy S, Jabir MS, Elgorban AM, Zhang W, Natarajan H. Chemical, Pharmacological, and Theoretical Aspects of Some Transition Metal(II) Complexes Derived from Pyrrole Azine Schiff Base. ACS OMEGA 2023; 8:34458-34470. [PMID: 37779929 PMCID: PMC10536097 DOI: 10.1021/acsomega.3c02860] [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: 04/26/2023] [Accepted: 08/10/2023] [Indexed: 10/03/2023]
Abstract
Some new transition metal complexes were prepared by reacting metal(II) salts with Schiff base azines, which were prepared via condensation of 5-(diethylamino) salicylaldehyde and hydrazine with pyrrole-2-carbaldehyde. Their structures were confirmed based on CHN, UV-visible, FT-IR, and EPR measurements. The complexes were also assessed for their antibacterial, antioxidant, and anticancer properties. Some of these chemicals were said to be extraordinarily effective in this respect. The antibacterial activities of the complexes in vitro demonstrated their potential, although the [Cu(L)(bpy] complex was suggested to exhibit moderate activity against pathogens compared to all other in this series. The cytotoxic activity of the prepared analogues showed better cell viability compared with standard cisplatin. Moreover, there is a good agreement between the experimental and theoretical findings from docking and theoretical investigations done using DFT at the B3LYP level.
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Affiliation(s)
- Sivan Arulmozhi
- Post-Graduate
and Research Department of Chemistry, the
New College (Autonomous), Chennai 600014, India
| | | | - Annadurai Subramani
- Department
of Biochemistry, Dwaraka Doss Goverdhan
Doss Vaishnav College, Chennai 600106, Tamil Nadu, India
| | | | - Syed J. Askar Ali
- Post-Graduate
and Research Department of Chemistry, the
New College (Autonomous), Chennai 600014, India
| | - Sasikumar Ponnusamy
- Department
of Physics, Saveetha School of Engineering,
SIMATS, Chennai 602 701, India
| | - Majid S. Jabir
- Department
of Applied Sciences, University of Technology-Iraq, 10011 Baghdad, Iraq
| | - Abdallah M. Elgorban
- Department
of Botany and Microbiology, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia
| | - Wanli Zhang
- School
of Food Science and Engineering, Hainan
University, Haikou 570228, PR China
| | - Hema Natarajan
- Department
of Physics, Jerusalem College of Engineering, Narayanapuram, Pallikaranai, Chennai 600100, India
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7
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Wang R, Wang C. Asymmetric imino-acylation of alkenes enabled by HAT-photo/nickel cocatalysis. Chem Sci 2023; 14:6449-6456. [PMID: 37325152 PMCID: PMC10266448 DOI: 10.1039/d3sc01945d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 05/19/2023] [Indexed: 06/17/2023] Open
Abstract
By merging nickel-mediated facially selective aza-Heck cyclization and radical acyl C-H activation promoted by tetrabutylammonium decatungstate (TBADT) as a hydrogen atom transfer (HAT) photocatalyst, we accomplish an asymmetric imino-acylation of oxime ester-tethered alkenes with readily available aldehydes as the acyl source, enabling the synthesis of highly enantioenriched pyrrolines bearing an acyl-substituted stereogenic center under mild conditions. Preliminary mechanistic studies support a Ni(i)/Ni(ii)/Ni(iii) catalytic sequence involving the intramolecular migratory insertion of a tethered olefinic unit into the Ni(iii)-N bond as the enantiodiscriminating step.
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Affiliation(s)
- Rui Wang
- Hefei National Laboratory for Physical Science at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 P. R. China
| | - Chuan Wang
- Hefei National Laboratory for Physical Science at the Microscale, Department of Chemistry, Center for Excellence in Molecular Synthesis, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 P. R. China
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8
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Wang X, Xue J, Rong ZQ. Divergent Access to Chiral C2- and C3-Alkylated Pyrrolidines by Catalyst-Tuned Regio- and Enantioselective C(sp 3)-C(sp 3) Coupling. J Am Chem Soc 2023. [PMID: 37307532 DOI: 10.1021/jacs.3c03900] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Novel-substituted pyrrolidine derivatives are widely used in drugs and bioactive molecules. The efficient synthesis of these valuable skeletons, especially enantiopure derivatives, is still recognized as a key bottleneck to overcome in chemical synthesis. Herein, we report a highly efficient catalyst-tuned regio- and enantioselective hydroalkylation reaction for the divergent synthesis of chiral C2- and C3-alkylated pyrrolidines through desymmetrization of the readily available 3-pyrrolines. The catalytic system consists of CoBr2 with a modified bisoxazoline (BOX) ligand, which can achieve the asymmetric C(sp3)-C(sp3) coupling via the distal stereocontrol, providing a series of C3-alkylated pyrrolidines in high efficiency. Moreover, the nickel catalytic system allows the enantioselective hydroalkylation to synthesize the C2-alkylated pyrrolidines through the tandem alkene isomerization/hydroalkylation reaction. This divergent method uses readily available catalysts, chiral BOX ligands, and reagents, delivering enantioenriched 2-/3-alkyl substituted pyrrolidines with excellent regio- and enantioselectivity (up to 97% ee). We also demonstrate the compatibility of this transformation with complex substrates derived from a series of drugs and bioactive molecules in good efficiency, which offers a distinct entry to more functionalized chiral N-heterocycles.
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Affiliation(s)
- Xuchao Wang
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, China
| | - Jing Xue
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, China
| | - Zi-Qiang Rong
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) & Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, Shaanxi 710072, China
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9
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Zhang ZF, Su MD. Influence of Group 15 elements on the [3 + 2] cycloaddition reactivity of G15 = G15-G15-based 1,3-dipoles with cyclooctyne. Dalton Trans 2023; 52:4796-4807. [PMID: 36939158 DOI: 10.1039/d3dt00313b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
The influence of Group 15 elements (G15s) on the reactivity of the cycloaddition reactions of inorganic 1,3-dipolar analogs with cyclooctyne was computationally explored with density functional theory. To this end, the G15G15G15'-based 1,3-dipole, an interestingly representative model molecule of 1,3-dipole chemistry, was selected. The present computational investigations suggest that all NNG15-Rea and G15G15P-Rea molecules can be energetically feasible to undergo 1,3-dipolar cycloaddition reactions with cyclic alkynes, except for only the NNN-Rea 1,3-dipole molecule. The key factor, which can greatly affect the activation barriers, is quantitatively analyzed in detail through the frontier molecular orbital (FMO) theory, the activation strain model (ASM), and the energy decomposition analysis (EDA) approach. Our theoretical findings based on the FMO theory and the EDA suggest that two types of bonding interactions occur in such 1,3-dipolar cycloaddition reactions: forward bonding (filled p-π orbital (cyclooctyne) → the empty p-π* orbital (G15 = G15)) and back bonding (empty p-π* orbital (cyclooctyne) ← the lone pair (G15')). Notably, the bonding interactions of the former mechanism are much stronger than those of the latter mechanism. Evidence from the ASM reveals that the activation barriers of G15G15G15'-based 1,3-dipolar cycloaddition reactions strongly depend on the atomic radius of the G15 element. These theoretical conclusions allow a number of predictions to be made.
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Affiliation(s)
- Zheng-Feng Zhang
- Department of Applied Chemistry, National Chiayi University, Chiayi 60004, Taiwan.
| | - Ming-Der Su
- Department of Applied Chemistry, National Chiayi University, Chiayi 60004, Taiwan. .,Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
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10
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Qi D, Zhang X, Wang X, Liu X, Zhang Z, Shi L, Zhang G. Nickel-Catalyzed Reductive Iminoarylation of Oxime Ester-Tethered Alkenes: Rapid Entrance to Diverse Functionalized Pyrrolines. Org Lett 2023; 25:1126-1130. [PMID: 36763011 DOI: 10.1021/acs.orglett.3c00088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Herein, we disclose a general and practical iminoarylation of alkenes by nickel-catalyzed reductive cross-coupling of unsaturated oxime esters with readily available aryl halides, providing an expedient approach for constructing pyrroline derivatives. The absence of organometallic reagents enables the reaction to occur under mild conditions with a broad substrate scope and good functional group tolerance. Moreover, other C-based electrophiles, including alkenyl, alkynyl and alkyl halides, or pseudohalides, were also competent substrates for this reaction.
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Affiliation(s)
- Di Qi
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Xingjie Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Xue Wang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Xiaopan Liu
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Zhiguo Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Lei Shi
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
| | - Guisheng Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, NMPA Key Laboratory for Research and Evaluation of Innovative Drug, School of Chemistry and Chemical Engineering, Henan Normal University (HNU), Xinxiang, Henan 453007, China
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11
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Zhang X, Wang H, Jia X, Yan H, Tian N. Photophysical and Photochemical Properties of Heterocyclic Analogs of 1,4-Cyclohexadiene: Experimental and Theoretical Studies. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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12
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Diversifying the superbase-catalyzed C=N bond ethynylation: triaryl-1-pyrrolines and triaryl-1H-pyrroles from N-benzyl aldimines and arylacetylenes. MENDELEEV COMMUNICATIONS 2023. [DOI: 10.1016/j.mencom.2023.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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13
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Synthesis, odor characteristics and thermal behaviors of pyrrole esters. JOURNAL OF SAUDI CHEMICAL SOCIETY 2023. [DOI: 10.1016/j.jscs.2023.101600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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14
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Ríos-Gutiérrez M, Domingo LR, Jasiński R. Unveiling the high reactivity of experimental pseudodiradical azomethine ylides within molecular electron density theory. Phys Chem Chem Phys 2022; 25:314-325. [PMID: 36477950 DOI: 10.1039/d2cp05032c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The [3+2] cycloaddition (32CA) reactions of N-methyl azomethine ylide (AY) with styrene, benzaldehyde and methyl 2-formyl-benzoate (MFB) were studied within molecular electron density theory (MEDT), at the ωB97X-D/6-311G(d) computational level, in order to characterize the reactivity of an experimental pseudodiradical TAC for the first time. ELF topological analysis indicates that AY presents a pseudodiradical structure. Analysis of CDFT reactivity indices allows classifying AY as a supernucleophile; while styrene is classified as a moderate electrophile, benzaldehyde and MFB are classified as strong electrophiles. The 32CA reaction with MFB is the most favorable one with a relatively low activation Gibbs free energy of 6.9 kcal mol-1, being irreversible and completely endo stereo- and chemo-selective towards the carbonyl group, a behavior predicted by the analysis of the Parr functions. The bonding evolution theory (BET) study indicates that while the 32CA reaction of AY with styrene is characterized as a pdr-type 32CA reaction, the one involving benzaldehyde follows a pmr-type mechanism prompted by the presence of the carbonyl group. The present MEDT study describes in detail the tunable high reactivity of one of the few experimentally available pseudodiradical TACs, showing that the mechanism of 32CA reactions can be modified not only by changing the electronic structure of TACs through proper substitution but also by the nature of their opposing ethylene derivative.
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Affiliation(s)
- Mar Ríos-Gutiérrez
- Department of Organic Chemistry, University of Valencia, Dr Moliner 50, Burjassot, 46100 Valencia, Spain.
| | - Luis R Domingo
- Department of Organic Chemistry, University of Valencia, Dr Moliner 50, Burjassot, 46100 Valencia, Spain.
| | - Radomir Jasiński
- Faculty of Chemical Engineering and Technology, Department of Organic Chemistry and Technology, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland.
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15
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Substituent-Dependent Divergent Synthesis of 2-(3-Amino-2,4-dicyanophenyl)pyrroles, Pyrrolyldienols and 3-Amino-1-acylethylidene-2-cyanopyrrolizines via Reaction of Acylethynylpyrroles with Malononitrile. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238528. [PMID: 36500621 PMCID: PMC9737003 DOI: 10.3390/molecules27238528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 11/30/2022] [Accepted: 11/30/2022] [Indexed: 12/11/2022]
Abstract
An efficient method for the synthesis of pharmaceutically and high-tech prospective 2-(3-amino-2,4-dicyanophenyl)pyrroles (in up to 88% yield) via the reaction of easily available substituted acylethynylpyrroles with malononitrile has been developed. The reaction proceeds in the KOH/MeCN system at 0 °C for 2 h. In the case of 2-acylethynylpyrroles without substituents in the pyrrole ring, the reaction changes direction: instead of the target 2-(3-amino-2,4-dicyanophenyl)pyrroles, the unexpected formation of pyrrolyldienols and products of their intramolecular cyclization, 3-amino-1-acylethylidene-2-cyanopyrrolizines, is observed.
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16
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Ertürk AG, Sekeroglu V, Yildirim E, Dindaroglu G, Sekeroglu ZA. Antipyrine derived-Schiff base copper complex: Synthesis, characterization, and in vitro evaluation. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Zhao F, Gu X, Franke R, Wu X. Copper‐Catalyzed 1,2‐Dicarbonylative Cyclization of Alkenes with Alkyl Bromides via Radical Cascade Process. Angew Chem Int Ed Engl 2022; 61:e202214812. [PMID: 36254794 PMCID: PMC10100518 DOI: 10.1002/anie.202214812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Indexed: 11/12/2022]
Abstract
Herein, we developed a new procedure on 1,2-dicarbonylative cyclization of 4-aryl-1-butenes with alkyl bromides. Using simple copper catalyst, two molecules of carbon monoxide were introduced into the double bond with the formation of four new C-C bonds and a new ring. Various α-tetralones and 2,3-dihydroquinolin-4-ones were formed in moderate to good yields.
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Affiliation(s)
- Fengqian Zhao
- Leibniz-Institut für Katalyse e.V. 18059 Rostock Germany
| | - Xing‐Wei Gu
- Leibniz-Institut für Katalyse e.V. 18059 Rostock Germany
| | - Robert Franke
- Evonik Performance Materials GmbH Paul-Baumann-Str. 1 45772 Marl Germany
- Lehrstuhl für Theoretische Chemie Ruhr-Universität Bochum 44780 Bochum Germany
| | - Xiao‐Feng Wu
- Leibniz-Institut für Katalyse e.V. 18059 Rostock Germany
- Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences 116023 Liaoning Dalian China
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18
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Katta N, Zhao QQ, Mandal T, Reiser O. Divergent and Synergistic Photocatalysis: Hydro- and Oxoalkylation of Vinyl Arenes for the Stereoselective Synthesis of Cyclopentanols via a Formal [4+1]-Annulation of 1,3-Dicarbonyls. ACS Catal 2022; 12:14398-14407. [PMID: 36439036 PMCID: PMC9680001 DOI: 10.1021/acscatal.2c04736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/06/2022] [Indexed: 11/10/2022]
Abstract
![]()
The controllable
divergent reactivity of 1,3-dicarbonyls is described,
which enables the efficient hydro- and oxoalkylation of vinyl arenes.
Both reaction pathways are initiated through the formation of polarity-reversed C-centered-radical intermediates at the active methylene
center of 1,3-dicarbonyls via direct photocatalytic C–H bond
transformations. The oxoalkylation of alkenes is achieved under aerobic
conditions via a Cu(II)-photomediated rebound mechanism, while
the corresponding hydroalkylation becomes possible under a nitrogen
atmosphere by the combination of 4CzIPN and a Brønsted base.
The breadth of these divergent protocols is demonstrated in the late-stage
modification of drugs and natural products and by the transformation
of the products to a variety of heterocycles such as pyridines, pyrroles,
or furans. Moreover, the two catalytic modes can be combined synergistically
for the stereoselective construction of cyclopentanol derivatives
in a formal [4+1]-annulation process.
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Affiliation(s)
- Narenderreddy Katta
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Quan-Qing Zhao
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Tirtha Mandal
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Oliver Reiser
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
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19
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A Molecular Electron Density Theory Study of the [3+2] Cycloaddition Reaction of an Azomethine Ylide with an Electrophilic Ethylene Linked to Triazole and Ferrocene Units. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27196532. [PMID: 36235069 PMCID: PMC9571756 DOI: 10.3390/molecules27196532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/17/2022]
Abstract
The [3+2] cycloaddition (32CA) reaction of an azomethine ylide (AY) with an electrophilic ethylene linked to triazole and ferrocene units has been studied within the Molecular Electron Density Theory (MEDT) at the ωB97X-D/6-311G(d,p) level. The topology of the electron localization function (ELF) of this AY allows classifying it as a pseudo(mono)radical species characterized by the presence of two monosynaptic basins, integrating a total of 0.76 e, at the C1 carbon. While the ferrocene ethylene has a strong electrophilic character, the AY is a supernucleophile, suggesting that the corresponding 32CA reaction has a high polar character and a low activation energy. The most favorable ortho/endo reaction path presents an activation enthalpy of 8.7 kcal·mol-1, with the 32CA reaction being exergonic by -42.1 kcal·mol-1. This reaction presents a total endo stereoselectivity and a total ortho regioselectivity. Analysis of the global electron density transfer (GEDT) at the most favorable TS-on (0.23 e) accounts for the high polar character of this 32CA reaction, classified as forward electron density flux (FEDF). The formation of two intermolecular hydrogen bonds between the two interacting frameworks at the most favorable TS-on accounts for the unexpected ortho regioselectivity experimentally observed.
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20
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Erande RD, Shivam S, Chavan KA, Chauhan ANS. Recent Advances in [3+2]-Cycloaddition-Enabled
Cascade Reactions: Application to
Synthesize Complex Organic Frameworks. Synlett 2022. [DOI: 10.1055/s-0042-1751369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
AbstractMany natural products and biologically important complex organic scaffolds have convoluted structures around their core skeleton. Interestingly, with just changing the outskirts, the core reflects new and unique degrees of various physical and chemical properties. A very common but intriguing core is a five-membered ring horning heaps of organic molecules crafts. The power of [3+2] cycloaddition reactions to generate five-membered ring systems allocate chemists to envision synthetic procedures of wonder molecules and if it is facilitating a cascade sequence, then the end product will imbibe significant level of complexity having applications in medicinal and pharmaceutical fields. This Account highlights the broad interest in assembling recent advances in cascade reactions involving [3+2] cycloaddition as the power tool in order to conceive breakthrough organic architectures reported in the last ten years. We foresee that our comprehensive collection of astonishing [3+2] cycloaddition enabled cascades will provide valuable insights to polycyclic molecular construction and perseverant approach towards nonconventional synthetic procedures to the organic community.1 Introduction2 Synthesis of Oxindoles Skeleton3 Synthesis of Oxazoles Skeleton4 Synthesis of Oxadiazoles Skeleton5 Synthesis of Nitrogen-Containing Heterocycles6 Synthesis via Formal [3+2] Cycloaddition7 Synthesis of Miscellaneous Scaffolds8 Conclusion
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21
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Xia M, Moussa Z, Judeh ZMA. Acetic Acid‐Catalyzed Selective Synthesis of
N
‐Substituted 2‐Amino‐3‐Cyanopyrroles
via
a Three‐Component Reaction Between Carbohydrates, Primary Amines and Malononitrile. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200367] [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)
- Mengxin Xia
- School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive, N1.2-B1-14 637459 Singapore Singapore
| | - Ziad Moussa
- Ziad Moussa – Department of Chemistry College of Science United Arab Emirates University P. O. Box 15551 Al Ain United Arab Emirates
| | - Zaher M. A. Judeh
- School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive, N1.2-B1-14 637459 Singapore Singapore
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22
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Yamaguchi M, Fujiwara S, Mori Y, Konishi H, Manabe K. Synthesis of multisubstituted pyrroles by ligand-controlled site-selective arylation and their transformation into multiarylated pyrrolines and pyrrolidines. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Tambe SD, Ka CH, Hwang HS, Bae J, Iqbal N, Cho EJ. Nickel‐Catalyzed Enantioselective Synthesis of 2,3,4‐Trisubstituted 3‐Pyrrolines. Angew Chem Int Ed Engl 2022; 61:e202203494. [DOI: 10.1002/anie.202203494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Shrikant D. Tambe
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Cheol Hyeon Ka
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Ho Seong Hwang
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Jaehan Bae
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Naeem Iqbal
- Department of Chemistry University of York Heslington, York YO10 5DD UK
| | - Eun Jin Cho
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
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24
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Pan Y, Luo ZL, Yang J, Han J, Yang J, yao Z, Xu L, Wang P, Shi Q. Cobalt‐Catalyzed Selective Transformation of Levulinic Acid and Amines into Pyrrolidines and Pyrrolidinones under H2. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200578] [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)
| | | | | | | | | | - zhen yao
- Renmin University of China CHINA
| | - Lijin Xu
- Renmin University of China CHINA
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25
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Borisova MA, Ryabukhin DS, Ivanov AY, Boyarskaya IA, Shabalin DA, Zelenkov LE, Sсhmidt EY, Trofimov BA, Vasilyev AV. Transformations of 5‐Hydroxy‐1‐pyrrolines in Strong Brønsted Acids: Experimental and Theoretical Study of Intermediate Cationic Species. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200468] [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)
- Marina A Borisova
- Saint Petersburg State Forest Engineering University named after S M Kirov: Sankt-Peterburgskij gosudarstvennyj lesotehniceskij universitet imeni S M Kirova chemistry RUSSIAN FEDERATION
| | - Dmitry S. Ryabukhin
- Saint Petersburg State Forest Technical University named after S M Kirov: Sankt-Peterburgskij gosudarstvennyj lesotehniceskij universitet imeni S M Kirova chemistry RUSSIAN FEDERATION
| | - Alexander Yu. Ivanov
- Saint Petersburg State University: Sankt-peterburgskij gosudarstvennyj universitet organic chemstry RUSSIAN FEDERATION
| | - Irina A. Boyarskaya
- Saint Petersburg State University: Sankt-peterburgskij gosudarstvennyj universitet organic chemstry RUSSIAN FEDERATION
| | - Dmitrii A. Shabalin
- AE Favorsky Irkutsk Institute of Chemistry SB RAS: Irkutskij institut himii imeni A E Favorskogo SO RAN chemistry RUSSIAN FEDERATION
| | - Lev E. Zelenkov
- ITMO University: Nacional'nyj issledovatel'skij universitet ITMO school of physics and engineering RUSSIAN FEDERATION
| | - Elena Yu. Sсhmidt
- AE Favorsky Irkutsk Institute of Chemistry SB RAS: Irkutskij institut himii imeni A E Favorskogo SO RAN chemistry RUSSIAN FEDERATION
| | - Boris A. Trofimov
- AE Favorsky Irkutsk Institute of Chemistry SB RAS: Irkutskij institut himii imeni A E Favorskogo SO RAN chemistry RUSSIAN FEDERATION
| | - Aleksander Viktorovich Vasilyev
- Saint-Petersburg State Forest Technical University Department of Organic Chemistry Institutsky per. 5 194021 Saint-petersburg RUSSIAN FEDERATION
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26
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Marques CS, Carreiro EP, Teixeira APS. Multicomponent Synthesis of Heterocycles. HETEROCYCLES 2022. [DOI: 10.1002/9783527832002.ch7] [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: 11/06/2022]
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27
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A Molecular Electron Density Theory Study of the [3+2] Cycloaddition Reaction of Pseudo(mono)radical Azomethine Ylides with Phenyl Vinyl Sulphone. ORGANICS 2022. [DOI: 10.3390/org3020010] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The [3+2] cycloaddition (32CA) reaction of an azomethine ylide (AY), derived from isatin and L-proline, with phenyl vinyl sulphone has been studied within Molecular Electron Density Theory (MEDT) at the ωB97X-D/6-311G(d,p) level. ELF topological analysis of AY classifies it as a pseudo(mono)radical species with two monosynaptic basins at the C1 carbon, integrating a total of 0.76 e. While vinyl sulphone has a strong electrophilic character, AY is a supernucleophile, suggesting a high polar character and low activation energy for the reaction. The nucleophilic Parr functions indicate that the pseudoradical C1 carbon is the most nucleophilic center. The 32CA reaction presents an activation Gibbs free energy of 13.1 kcal·mol−1 and is exergonic by −26.8 kcal·mol−1. This reaction presents high endo stereoselectivity and high meta regioselectivity. Analysis of the global electron density transfer (GEDT) at the most favorable meta/endo TS, 0.31 e, accounts for the high polar character of this 32CA reaction, classified by forward electron density flux (FEDF). A Bonding Evolution Theory (BET) study along the most favorable meta/endo reaction path characterizes this 32CA reaction, taking place through a non-concerted two-stage one-step mechanism, as a pseudo(mono)radical-type 32CA reaction, in agreement with the ELF analysis of the AY.
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28
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Tambe SD, Ka CH, Hwang HS, Bae J, Iqbal N, Cho EJ. Nickel‐Catalyzed Enantioselective Synthesis of 2,3,4‐Trisubstituted 3‐Pyrrolines. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shrikant D. Tambe
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Cheol Hyeon Ka
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Ho Seong Hwang
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Jaehan Bae
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
| | - Naeem Iqbal
- Department of Chemistry University of York Heslington, York YO10 5DD UK
| | - Eun Jin Cho
- Department of Chemistry Chung-Ang University 84 Heukseok-ro Dongjak-gu, Seoul 06974 Republic of Korea
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29
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Lemrová B, Maloň M, Soural M. Efficient synthesis of pentasubstituted pyrroles via intramolecular C-arylation. Org Biomol Chem 2022; 20:3811-3816. [PMID: 35467690 DOI: 10.1039/d2ob00536k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Immobilized L-aspartic acid beta-methyl ester (Fmoc-Asp(OMe)-OH) was reacted with 4-nitrobenzenesulfonyl chloride, followed by alkylation with various α-haloketones. The resulting intermediates were treated with potassium trimethylsilanolate, which yielded tetrasubstituted pyrroles after a one-step transformation consisting of sequential C-arylation, aldol condensation and spontaneous aromatization. The discovered synthetic strategy enables fast and simple access to pentasubstituted and functionalized pyrroles from a number of readily available starting materials.
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Affiliation(s)
- Barbora Lemrová
- Department of Organic Chemistry, Faculty of Science, Palacký University, 17. Listopadu 12, 77146 Olomouc, Czech Republic.
| | - Michal Maloň
- JEOL (U.K.) Ltd, JEOL House, Silver Court, Watchmead, Welwyn Garden City, Hertfordshire AL7 1LT, UK
| | - Miroslav Soural
- Department of Organic Chemistry, Faculty of Science, Palacký University, 17. Listopadu 12, 77146 Olomouc, Czech Republic. .,Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Hněvotínská 5, 77900 Olomouc, Czech Republic
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30
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Tran YBN, Nguyen PTK. A New Zinc‐Based Metal‐Organic Framework for Catalytic Synthesis of
N
‐Substituted Pyrroles. ChemistrySelect 2022. [DOI: 10.1002/slct.202200592] [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)
- Y B. N. Tran
- Future Materials & Devices Laboratory Institute of Fundamental and Applied Sciences Duy Tan University Ho Chi Minh City 700000 Vietnam
- Faculty of Natural Sciences Duy Tan University Da Nang 550000 Vietnam
| | - Phuong T. K. Nguyen
- Future Materials & Devices Laboratory Institute of Fundamental and Applied Sciences Duy Tan University Ho Chi Minh City 700000 Vietnam
- Faculty of Natural Sciences Duy Tan University Da Nang 550000 Vietnam
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31
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Zi Q, Cong J, Li L, Yin M, Zhao J, Li L, Yang X. Synthesis of 1-pyrroline derivatives via cyclization of terminal alkynes with 2-azaallyls. Org Biomol Chem 2022; 20:2843-2851. [PMID: 35297933 DOI: 10.1039/d2ob00102k] [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
An efficient transition-metal-free cyclization reaction to prepare 1-pyrroline derivatives bearing various functional groups is described. In this method, a simple combination of a base and a solvent allows the cyclization reaction of terminal alkynes and 2-azaallyls to be carried out efficiently under mild and metal-free conditions. This cyclization reaction will provide an efficient method for the synthesis of medicinally relevant polysubstituted and multifunctionalized pyrrolines.
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Affiliation(s)
- Quanxing Zi
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Jielun Cong
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Lun Li
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Meng Yin
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Jingfeng Zhao
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Liang Li
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resources, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
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32
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Sun LZ, Yang X, Li NN, Li M, Ouyang Q, Xie JB. Rhodium-Catalyzed Ring Expansion of Azetidines via Domino Conjugate Addition/N-Directed α-C(sp 3)-H Activation. Org Lett 2022; 24:1883-1888. [PMID: 35266389 DOI: 10.1021/acs.orglett.2c00056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A facile synthetic method for 4-aryl-4,5-dihydropyrrole-3-carboxylates is developed, with a rhodium-catalyzed ring expansion strategy from readily available 2-(azetidin-3-ylidene) acetates and aryl boronic acids. Mechanistic investigations suggest a novel domino "conjugate addition/N-directed α-C(sp3)-H activation" process. The asymmetric catalytic synthesis of the 4-aryl-4,5-dihydropyrrole-3-carboxylate is realized by using QuinoxP* (91-97% ee). The synthetic utility of this protocol is demonstrated by the synthesis of 3,4-disubstituted or 2,3,4-trisubstituted pyrrolidines with excellent diastereoselectivities.
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Affiliation(s)
- Ling-Zhi Sun
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Xuan Yang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Nan-Nan Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Meng Li
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China
| | - Qin Ouyang
- College of Pharmacy, Third Military Medical University, Chongqing 400038, China
| | - Jian-Bo Xie
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China.,Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
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33
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Sopbué Fondjo E, Njoya AS, Tamokou JDD, Doungmo G, Ndjakou Lenta B, Simon PFW, Tsopmo A, Kuiate JR. Synthesis, characterization and antimicrobial properties of two derivatives of pyrrolidine-2,5-dione fused at positions-3,4 to a dibenzobarrelene backbone. BMC Chem 2022; 16:8. [PMID: 35241152 PMCID: PMC8895586 DOI: 10.1186/s13065-022-00801-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 01/11/2022] [Indexed: 11/21/2022] Open
Abstract
A new diazo derivative of a pyrrolidine-2,5-dione (8) fused at position-3,4 to a dibenzobarrelene backbone has been prepared by coupling the previously reported N-arylsuccinimid (5) precursor with aryldiazonium ion of aniline. The initial step of the reaction involved the preparation of the intermediate 9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboxylic anhydride (3) through [4 + 2]-cycloaddition between anthracene and maleic anhydride in refluxing xylene which was then condensed with para-aminophenol to give compound 5. Compounds 5 and 8 were characterized by their physical, elemental, and spectroscopic data. 2D-NMR (COSY, HSQC, and HMBC) techniques were used to confirm the structure of compound 5. Compounds 5 (MIC = 32–128 μg/mL) and 8 (MIC = 16–256 μg/mL) along with the precursor 3 (MIC = 64–128 μg/mL) displayed moderate to low antimicrobial activities against selected bacterial and fungal species when compared with those of nystatin (MIC = 0.50–2 μg/mL) and ciprofloxacin (MIC = 0.50–16 μg/mL) used as reference drugs.
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Affiliation(s)
- Emmanuel Sopbué Fondjo
- Laboratory of Applied Synthetic Organic Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Republic of Cameroon.
| | - Abdou Salamou Njoya
- Laboratory of Applied Synthetic Organic Chemistry, Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Republic of Cameroon
| | - Jean-de-Dieu Tamokou
- Research Unit of Microbiology and Antimicrobial Substances, Department of Biochemistry, Faculty of Science, University of Dschang, PO Box 067, Dschang, Republic of Cameroon
| | - Giscard Doungmo
- Institut Für Anorganische Chemie, Christian-Albrechts-Universität Zu Kiel, Max-Eyth-Straße 2, 24118, Kiel, Germany
| | - Bruno Ndjakou Lenta
- Higher Teacher's Training College, University of Yaounde I, P. O. Box 47, Yaounde, Cameroon
| | - Peter F W Simon
- Polymer Chemistry Laboratory, Faculty of Live Sciences, Rhein-Waal University of Applied Sciences, Marie-Curie Straße 1, 47533, Kleve, Germany
| | - Apollinaire Tsopmo
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, K1S5B6, Canada
| | - Jules-Roger Kuiate
- Research Unit of Microbiology and Antimicrobial Substances, Department of Biochemistry, Faculty of Science, University of Dschang, PO Box 067, Dschang, Republic of Cameroon
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34
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Liu J, Lu LQ, Luo Y, Zhao W, Sun PC, Jin W, Qi X, Cheng Y, Xiao WJ. Photoredox-Enabled Chromium-Catalyzed Alkene Diacylations. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05672] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jing Liu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
| | - Liang-Qiu Lu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Yixin Luo
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Wei Zhao
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
| | - Peng-Chao Sun
- Urumqi Key Laboratory of Green Catalysis and Synthesis Technology, Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uygur Autonomous Region, State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, P. R. China
| | - Weiwei Jin
- Urumqi Key Laboratory of Green Catalysis and Synthesis Technology, Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uygur Autonomous Region, State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, P. R. China
| | - Xiaotian Qi
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Ying Cheng
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
| | - Wen-Jing Xiao
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, P. R. China
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35
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Seo K, Jang SH, Rhee YH. Sequential Metal Catalysis towards 7‐Oxostaurosporine and Its Non‐Natural Septanose Analogue. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112524] [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)
- Kyeongdeok Seo
- Department of Chemistry Pohang University of Science and Technology Cheongam-Ro 77, Nam-Gu Pohang, Kyeongbuk 37673 Republic of Korea
| | - Seok Hyeon Jang
- Department of Chemistry Pohang University of Science and Technology Cheongam-Ro 77, Nam-Gu Pohang, Kyeongbuk 37673 Republic of Korea
| | - Young Ho Rhee
- Department of Chemistry Pohang University of Science and Technology Cheongam-Ro 77, Nam-Gu Pohang, Kyeongbuk 37673 Republic of Korea
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36
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Klyba LV, Nedolya NA, Sanzheeva ER, Tarasova OA. Mass Spectra of New Heterocycles: XXIII. Electron Impact and Chemical Ionization Study of 5-[(Cyanomethyl)sulfanyl]- and 5-[(1,3-Dioxolan-2-ylmethyl)sulfanyl]-1H-pyrrol-2-amines. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428021120022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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37
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Meshkatalsadat MH, Mahmoudi A, Lotfi S, Pouramiri B, Foroumadi A. Green and four-component cyclocondensation synthesis and in silico docking of new polyfunctionalized pyrrole derivatives as the potential anticholinesterase agents. Mol Divers 2022; 26:3021-3035. [PMID: 35034271 DOI: 10.1007/s11030-021-10362-9] [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: 09/29/2021] [Accepted: 12/03/2021] [Indexed: 11/25/2022]
Abstract
Synthesis of new substituted pyrrole scaffolds containing substituted thiadiazol-2-amine moiety was successfully developed through one-pot and multi-component tandem condensation reaction utilizing of triethyl ammonium hydrogen sulfate ([Et3NH][HSO4]) ionic liquid as a green media under solvent-free conditions. The chemical structures of all newly synthesized compounds were fully characterized by spectroscopic methods (IR, 1H NMR, 13C NMR) and elemental analyzes. The molecular docking studies were also performed to predict the possible binding sites of the derivatives on the active site gorge of cholinesterase enzymes (AChE and BuChE). The results showed that all the seventeen derivatives interact with the enzymes with high affinity and among them 7d and 7f possess the greatest ability to bind to AChE and BuChE, respectively.
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Affiliation(s)
| | - Ahmad Mahmoudi
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Safa Lotfi
- Department of Biotechnology, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
| | - Behjat Pouramiri
- Department of Chemistry, Faculty of Science, Qom University of Technology, 37195, Qom, Iran.
| | - Alireza Foroumadi
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
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38
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TiO2-coated graphene oxide-molybdate complex as a new separable nanocatalyst for the synthesis of pyrrole derivatives by Paal-Knorr reaction. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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39
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40
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Pagadala R, Kasi V, Shabalala NG, Jonnalagadda SB. Ultrasound-assisted multicomponent synthesis of heterocycles in water – A review. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2021.103544] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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41
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Seo K, Jang SH, Rhee YH. Sequential Metal Catalysis towards 7-Oxostaurosporine and Its Non-Natural Septanose Analogue. Angew Chem Int Ed Engl 2021; 61:e202112524. [PMID: 34786807 DOI: 10.1002/anie.202112524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Indexed: 11/09/2022]
Abstract
We report sequential metal catalysis towards indolocarbazole glycosides. The signature event is highlighted by i) Pd0 -catalyzed addition of indolocarbazole to alkoxyallene combined with ring-closing-metathesis; ii) Ru-catalyzed chemoselective olefin migration; iii) PdII -catalyzed oxidative cyclization to build the bicyclic core structure of the target compounds. This approach gave access to both natural pyranose- and non-natural septanose glycosides. A short formal synthesis of 7-oxostaurosporine was achieved via this strategy.
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Affiliation(s)
- Kyeongdeok Seo
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-Ro 77, Nam-Gu, Pohang, Kyeongbuk, 37673, Republic of Korea
| | - Seok Hyeon Jang
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-Ro 77, Nam-Gu, Pohang, Kyeongbuk, 37673, Republic of Korea
| | - Young Ho Rhee
- Department of Chemistry, Pohang University of Science and Technology, Cheongam-Ro 77, Nam-Gu, Pohang, Kyeongbuk, 37673, Republic of Korea
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42
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Optimization of Ultrasound-Assisted Extraction of Bioactive Compounds from Acacia Seyal Gum Using Response Surface Methodology and Their Chemical Content Identification by Raman, FTIR, and GC-TOFMS. Antioxidants (Basel) 2021; 10:antiox10101612. [PMID: 34679747 PMCID: PMC8533610 DOI: 10.3390/antiox10101612] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/07/2021] [Accepted: 10/08/2021] [Indexed: 11/19/2022] Open
Abstract
Acacia Seyal gum (ASG), also known as gum Arabic, is an antioxidant-rich soluble fiber. ASG has been reported to have many biological activities, including anticancer, antidiabetic, antiulcer, and immunomodulatory activity. Extraction of bioactive compounds from ASG is commonly performed using conventional extraction methods. However, these techniques have certain limitation in terms of extraction time, energy, and solvent requirements. Ultrasound-assisted extraction (UAE) could be used as an alternative technique to extract bioactive compounds in less time, at low temperature, and with less energy and solvent requirements. In this study, the UAE extraction of ASG was optimized using response surface methodology (RSM). A face-centered central composite design (FCCCD) was used to monitor the effect of different independent factors of ultrasound operation (sonication time, temperature, and solvent ratio) on ASG extraction yield. In addition, screening and characterization of phytochemicals in 60% ethanol ASG extract was carried out using Raman microscopy, Fourier transform infrared spectroscopy (FTIR), and gas chromatography time-of-flight mass spectroscopy (GC-TOFMS) analysis. The results indicated that, under optimal conditions (extraction time 45 min, extraction temperature 40 °C, and solid–liquid ratio of 1:25 g/mL), the yield of ASG was 75.87% ± 0.10. This yield was reasonably close to the predicted yield of 75.39% suggested by the design of experiment. The ANOVA revealed that the model was highly significant due to the low probability value (p < 0.0001). Raman spectrum fingerprint detected polysaccharides, such as galactose and glucose, and protein like lysine and proline, while FTIR spectrum revealed the presence of functional groups peaks value of alkanes, aldehydes, aliphatic amines, and phenol. GC-TOFMS spectroscopic detected the presence of strong d-galactopyranose, carotenoid, and lycopene antioxidant compounds. In conclusion, this study demonstrated that the UAE technique is an efficient method to achieve a high yield of ASG extracts. The selected model is adequate to optimize the extraction of several chemical compounds reported in this study.
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43
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Synthesis and spectroscopic properties of rotamers in the series of 2-(fluoroaryl)-4-substituted pyrroles. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2021.109863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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44
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Ye C, Jiao Y, Chiou MF, Li Y, Bao H. Direct synthesis of pentasubstituted pyrroles and hexasubstituted pyrrolines from propargyl sulfonylamides and allenamides. Chem Sci 2021; 12:9162-9167. [PMID: 34276946 PMCID: PMC8261710 DOI: 10.1039/d1sc02090k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/05/2021] [Indexed: 11/21/2022] Open
Abstract
Multisubstituted pyrroles are important fragments that appear in many bioactive small molecule scaffolds. Efficient synthesis of multisubstituted pyrroles with different substituents from easily accessible starting materials is challenging. Herein, we describe a metal-free method for the preparation of pentasubstituted pyrroles and hexasubstituted pyrrolines with different substituents and a free amino group by a base-promoted cascade addition-cyclization of propargylamides or allenamides with trimethylsilyl cyanide. This method would complement previous methods and support expansion of the toolbox for the synthesis of valuable, but previously inaccessible, highly substituted pyrroles and pyrrolines. Mechanistic studies to elucidate the reaction pathway have been conducted.
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Affiliation(s)
- Changqing Ye
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 155 Yangqiao Road West Fuzhou Fujian 350002 People's Republic of China
| | - Yihang Jiao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 155 Yangqiao Road West Fuzhou Fujian 350002 People's Republic of China
| | - Mong-Feng Chiou
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 155 Yangqiao Road West Fuzhou Fujian 350002 People's Republic of China
| | - Yajun Li
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 155 Yangqiao Road West Fuzhou Fujian 350002 People's Republic of China
| | - Hongli Bao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences 155 Yangqiao Road West Fuzhou Fujian 350002 People's Republic of China
- University of Chinese Academy of Sciences Beijing 100049 People's Republic of China
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45
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Ru GX, Zhang TT, Zhang M, Jiang XL, Wan ZK, Zhu XH, Shen WB, Gao GQ. Recent progress towards the transition-metal-catalyzed Nazarov cyclization of alkynes via metal carbenes. Org Biomol Chem 2021; 19:5274-5283. [PMID: 34060570 DOI: 10.1039/d1ob00744k] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
In recent years, transition-metal-catalyzed tandem cyclization reactions of alkynes, especially those involving a metal carbene intermediate, have received worthwhile interest, as this type of reaction does not require the use of risky and potentially explosive diazo compounds as starting materials for carbene generation. A significant and general strategy for the stereospecific synthesis of 5-membered cycles is Nazarov cyclization based on the 4π-conrotatory electrocyclization of a conjugated pentadienyl cation to afford a cyclopentenyl cation. In this review, we introduce an overview of recent advances in the transition-metal-catalyzed Nazarov cyclization of alkynes via a metal carbene intermediate, and categorize these reactions according to the structure of the metal carbene. Our aim is to accelerate advancements in this enchanting area of research.
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Affiliation(s)
- Guang-Xin Ru
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Ting-Ting Zhang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Meng Zhang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Xiao-Lei Jiang
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Zheng-Kai Wan
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Xiu-Hong Zhu
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Wen-Bo Shen
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
| | - Guang-Qin Gao
- College of Sciences and College of Forestry, Henan Agricultural University, Zhengzhou, Henan 450002, China.
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46
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Matthee C, Terre'Blanche G, Legoabe LJ, Janse van Rensburg HD. Exploration of chalcones and related heterocycle compounds as ligands of adenosine receptors: therapeutics development. Mol Divers 2021; 26:1779-1821. [PMID: 34176057 DOI: 10.1007/s11030-021-10257-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 06/15/2021] [Indexed: 12/20/2022]
Abstract
Adenosine receptors (ARs) are ubiquitously distributed throughout the mammalian body where they are involved in an extensive list of physiological and pathological processes that scientists have only begun to decipher. Resultantly, AR agonists and antagonists have been the focus of multiple drug design and development programmes within the past few decades. Considered to be a privileged scaffold in medicinal chemistry, the chalcone framework has attracted a substantial amount of interest in this regard. Due to the potential liabilities associated with its structure, however, it has become necessary to explore other potentially promising compounds, such as heterocycles, which have successfully been obtained from chalcone precursors in the past. This review aims to summarise the emerging therapeutic importance of adenosine receptors and their ligands, especially in the central nervous system (CNS), while highlighting chalcone and heterocyclic derivatives as promising AR ligand lead compounds.
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Affiliation(s)
- Chrisna Matthee
- Pharmaceutical Chemistry, School of Pharmacy, North-West University, Private Bag X6001, Potchefstroom, 2520, North West, South Africa
| | - Gisella Terre'Blanche
- Pharmaceutical Chemistry, School of Pharmacy, North-West University, Private Bag X6001, Potchefstroom, 2520, North West, South Africa.,Centre of Excellence for Pharmaceutical Sciences, School of Pharmacy, North-West University, Private Bag X6001, Potchefstroom, 2520, North West, South Africa
| | - Lesetja J Legoabe
- Centre of Excellence for Pharmaceutical Sciences, School of Pharmacy, North-West University, Private Bag X6001, Potchefstroom, 2520, North West, South Africa
| | - Helena D Janse van Rensburg
- Pharmaceutical Chemistry, School of Pharmacy, North-West University, Private Bag X6001, Potchefstroom, 2520, North West, South Africa.
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47
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Atmaca H, Ilhan S, Yilmaz ES, Zora M. 4-Propargyl-substituted 1H-pyrroles induce apoptosis and autophagy via extracellular signal-regulated signaling pathway in breast cancer. Arch Pharm (Weinheim) 2021; 354:e2100170. [PMID: 34165807 DOI: 10.1002/ardp.202100170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/06/2021] [Accepted: 06/07/2021] [Indexed: 11/10/2022]
Abstract
Novel pyrrole derivatives (PDs) with propargyl units (1-7) were investigated for their anticancer activity on breast cancer cells. The MTT assay was used to assess the cell viability. Morphological changes in human breast cancer cells were visualized under a phase-contrast microscope. Apoptosis and autophagy were detected using the DNA fragmentation assay and staining by autophagic vacuoles, respectively. The levels of apoptosis- and autophagy-related proteins such as cytochrome c, Bcl-2, LC3-I/II were investigated by Western blot analysis. The effect of PDs on the ERK1/2 signaling pathway was investigated using specific inhibitors. All the tested PDs were found to be active in the range of 36.7 ± 0.2 to 459.7 ± 4.2 µM. Compounds 3 and 4 showed cytotoxic activity in breast cancer cells, but were found to be safer with lower cytotoxicity on human nontumorigenic epithelial breast cells. Compound 4 induced apoptosis, whereas compound 3 induced autophagy. Both compounds inhibited the ERK signaling pathway in breast cancer cells. The present study revealed that both synthesized PDs induced different programmed cell death types by inhibiting the ERK signaling pathway in two genotypically different breast cancer cells. Therefore, novel PDs might be promising anticancer agents for breast cancer therapy and further structural modifications of PDs may yield promising anticancer agents.
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Affiliation(s)
- Harika Atmaca
- Department of Biology, Faculty of Science and Letters, Manisa Celal Bayar University, Manisa, Turkey
| | - Suleyman Ilhan
- Department of Biology, Faculty of Science and Letters, Manisa Celal Bayar University, Manisa, Turkey
| | - Elif Serel Yilmaz
- Department of Chemistry, Middle East Technical University, Ankara, Turkey
| | - Metin Zora
- Department of Chemistry, Middle East Technical University, Ankara, Turkey
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48
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Xiong J, Mu Z, Yao G, Zhang J, Feng Q, He H, Pang Y, Shi H, Ding M. One‐Pot
Synthesis of Polysubstituted Pyrroles
via
Sequential Ketenimine Formation/Ag(I)‐Catalyzed Alkyne Cycloisomerisation Starting from Ylide Adducts. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000639] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jun Xiong
- School of Pharmacy, Hubei University of Science and Technology Xianning Hubei 437100 China
| | - Zhi‐Ying Mu
- School of Pharmacy, Hubei University of Science and Technology Xianning Hubei 437100 China
| | - Gang Yao
- School of Pharmacy, Hubei University of Science and Technology Xianning Hubei 437100 China
| | - Jia‐An Zhang
- School of Pharmacy, Hubei University of Science and Technology Xianning Hubei 437100 China
| | - Qi‐Xun Feng
- School of Pharmacy, Hubei University of Science and Technology Xianning Hubei 437100 China
| | - Hui‐Ting He
- School of Pharmacy, Hubei University of Science and Technology Xianning Hubei 437100 China
| | - Yong‐Long Pang
- School of Pharmacy, Hubei University of Science and Technology Xianning Hubei 437100 China
| | - Hang Shi
- School of Pharmacy, Hubei University of Science and Technology Xianning Hubei 437100 China
| | - Ming‐Wu Ding
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Central China Normal University Wuhan Hubei 430079 China
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49
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Study of the cyclization of N-hydroxy- and N-methoxy-N-(2-oxoalkyl)amides. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01673-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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50
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Kumar P, Keshri SK, Kapur M. Ru(II)-Catalyzed, Cu(II)-mediated carbene migratory insertion in the synthesis of trisubstituted pyrroles from isoxazoles. Org Biomol Chem 2021; 19:3428-3433. [PMID: 33899880 DOI: 10.1039/d1ob00255d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A convenient, "one-pot" synthesis of trisubstituted pyrroles via a Ru(ii)-catalyzed, Cu(ii)-mediated reaction of substituted isoxazoles with sulfonylhydrazones has been developed. A series of highly functionalized pyrroles are obtained via a synergistic formation of new C-C and C-N bonds. Mechanistic investigations were carried out to propose the plausible pathway. This protocol provides a facile and expeditious approach for the synthesis of various heterocyclic compounds bearing the pyrrole skeleton.
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Affiliation(s)
- Pravin Kumar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal Bypass road, Bhopal 462066, MP, India.
| | - Santosh Kumar Keshri
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal Bypass road, Bhopal 462066, MP, India.
| | - Manmohan Kapur
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal Bypass road, Bhopal 462066, MP, India.
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