1
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Zhang H, Li M, Wang K, Chen Y, Liao B, Wang Q, Yi W. An Accesss to 4,5,6-Trisubstituted Pyrimidines from 2 H-Azirines and α-Isocyanoacetates or α-Isocyanoacetamides Enabled by 1,3-Dipolar [3 + 2] Cycloaddition/Ring-Expanding/Oxidative Aromatization Process. J Org Chem 2024; 89:1692-1702. [PMID: 38207341 DOI: 10.1021/acs.joc.3c02378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
The products containing pyrimidine scaffolds exhibit various important physiological and biological activities. To date, the strategies to generate 4,5,6-trisubstituted pyrimidines were not reported. Here, a copper-catalyzed reaction of 2H-azirines with α-isocyanoacetates or α-isocyanoacetamides has been developed, rapidly preparing 4,5,6-trisubstituted pyrimidines. The mechanistic results reveal that this strategy underwent a formal 1, 3-dipolar [3 + 2] cycloaddition/ring-expanding/oxidative aromatization procedure to construct the desired pyrimidines.
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Affiliation(s)
- Haoxiang Zhang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Mengfan Li
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Kunpeng Wang
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Yan Chen
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Benren Liao
- Shanghai No.4 Reagent Chemical Co., Ltd. Shanghai 201512, P. R. China
| | - Qingwei Wang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China
| | - Weiyin Yi
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai 201418, P. R. China
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2
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Templ J, Schnürch M. Allylation of C-, N-, and O-Nucleophiles via a Mechanochemically-Driven Tsuji-Trost Reaction Suitable for Late-Stage Modification of Bioactive Molecules. Angew Chem Int Ed Engl 2024; 63:e202314637. [PMID: 37931225 PMCID: PMC10952285 DOI: 10.1002/anie.202314637] [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: 09/29/2023] [Revised: 11/03/2023] [Accepted: 11/06/2023] [Indexed: 11/08/2023]
Abstract
We present the first solvent-free, mechanochemical protocol for a palladium-catalyzed Tsuji-Trost allylation. This approach features exceptionally low catalyst loadings (0.5 mol %), short reaction times (<90 min), and a simple setup, eliminating the need for air or moisture precautions, making the process highly efficient and environmentally benign. We introduce solid, nontoxic, and easy-to-handle allyl trimethylammonium salts as valuable alternative to volatile or hazardous reagents. Our approach enables the allylation of various O-, N-, and C-nucleophiles in yields up to 99 % even for structurally complex bioactive compounds, owing to its mild conditions and exceptional functional group tolerance.
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Affiliation(s)
- Johanna Templ
- Institute of Applied Synthetic Chemistry, TU WienGetreidemarkt 9/E1631060ViennaAustria
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry, TU WienGetreidemarkt 9/E1631060ViennaAustria
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3
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Templ J, Schnürch M. Allylation of C-, N-, and O-Nucleophiles via a Mechanochemically-Driven Tsuji-Trost Reaction Suitable for Late-Stage Modification of Bioactive Molecules. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 136:e202314637. [PMID: 38516646 PMCID: PMC10953357 DOI: 10.1002/ange.202314637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Indexed: 03/23/2024]
Abstract
We present the first solvent-free, mechanochemical protocol for a palladium-catalyzed Tsuji-Trost allylation. This approach features exceptionally low catalyst loadings (0.5 mol %), short reaction times (<90 min), and a simple setup, eliminating the need for air or moisture precautions, making the process highly efficient and environmentally benign. We introduce solid, nontoxic, and easy-to-handle allyl trimethylammonium salts as valuable alternative to volatile or hazardous reagents. Our approach enables the allylation of various O-, N-, and C-nucleophiles in yields up to 99 % even for structurally complex bioactive compounds, owing to its mild conditions and exceptional functional group tolerance.
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Affiliation(s)
- Johanna Templ
- Institute of Applied Synthetic Chemistry, TU WienGetreidemarkt 9/E1631060ViennaAustria
| | - Michael Schnürch
- Institute of Applied Synthetic Chemistry, TU WienGetreidemarkt 9/E1631060ViennaAustria
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4
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Zhan JL, Zhu L, Bai JN, Liu JB, Zhang SH, Xie YQ, Hu BM, Wang Y, Han WJ. Transition metal-free [3 + 3] annulation of cyclopropanols with β-enamine esters to assemble nicotinate derivatives. Org Biomol Chem 2023; 21:8984-8988. [PMID: 37937487 DOI: 10.1039/d3ob01662e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
A metal-free and efficient approach for the synthesis of structurally important nicotinates through 4-HO-TEMPO-mediated [3 + 3] annulation of cyclopropanols with β-enamine esters is presented. This protocol features high atom efficiency, green waste, simple operation and broad substrate scope. Moreover, the experiments of gram-scale synthesis and recovery of oxidants make this strategy more sustainable and practical.
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Affiliation(s)
- Jun-Long Zhan
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455000, P. R. China.
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Lin Zhu
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455000, P. R. China.
- Henan Province Key Laboratory of New Opto-electronic Functional Materials, Anyang, 455000, P. R. China
| | - Jia-Nan Bai
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455000, P. R. China.
| | - Jian-Bo Liu
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455000, P. R. China.
| | - Shi-Han Zhang
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455000, P. R. China.
| | - Yao-Qiang Xie
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455000, P. R. China.
| | - Bo-Mei Hu
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455000, P. R. China.
- Henan Province Key Laboratory of New Opto-electronic Functional Materials, Anyang, 455000, P. R. China
| | - Yang Wang
- Henan Provincial Engineering and Technology Research Center for Precise Synthesis of Fluorine-Containing Drugs, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, 455000, P. R. China.
| | - Wen-Jun Han
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
- Henan Engineering Research Center of Green Synthesis for Pharmaceuticals, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, 476000, P. R. China
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5
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Roy A, Biswas S, Duari S, Maity S, Mishra AK, Souza ARD, Elsharif AM, Morgon NH, Biswas S. Regioselective Transition Metal-Free Catalytic Ring Opening of 2 H-Azirines by Phenols and Naphthols; One-Pot Access to Benzo- and Naphthofurans. J Org Chem 2023; 88:15580-15588. [PMID: 37933871 DOI: 10.1021/acs.joc.3c01266] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Benzofuran and naphthofuran derivatives are synthesized from readily available phenols and naphthols. Regioselective ring openings of 2H-azirine followed by in situ aromatization using a catalytic amount of Brønsted acid have established the novelty of the methodology. The involvement of a series of 2H-azirines with a variety of phenols, 1-naphthols, and 2-naphthols showed the generality of the protocol. In-depth density functional theory calculations revealed the reaction mechanism with the energies of the intermediates and transition states of a model reaction. An alternate pathway of the mechanism has also been proposed with computer modeling.
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Affiliation(s)
- Arnab Roy
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, West Bengal, India
| | - Subrata Biswas
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, West Bengal, India
| | - Surajit Duari
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, West Bengal, India
| | - Srabani Maity
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, West Bengal, India
| | - Abhishek Kumar Mishra
- Department of Medicinal and Process Chemistry, CSIR-Central Drug Research Institute, Lucknow 226031, Uttar Pradesh, India
| | - Aguinaldo R de Souza
- Department of Chemistry, School of Science, São Paulo State University, Bauru 17033-360, São Paulo, Brazil
| | - Asma M Elsharif
- Department of Chemistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
| | - Nelson H Morgon
- Department of Physical Chemistry, Institute of Chemistry, Campinas State University, Campinas 13083-970, São Paulo, Brazil
| | - Srijit Biswas
- Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700 009, West Bengal, India
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6
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Vaithegi K, Yi S, Lee JH, Varun BV, Park SB. Synthesis of substituted pyridines with diverse functional groups via the remodeling of (Aza)indole/Benzofuran skeletons. Commun Chem 2023; 6:112. [PMID: 37286709 DOI: 10.1038/s42004-023-00914-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/30/2023] [Indexed: 06/09/2023] Open
Abstract
Substituted pyridines with diverse functional groups are important structural motifs found in numerous bioactive molecules. Several methodologies for the introduction of various bio-relevant functional groups to pyridine have been reported, but there is still a need for a single robust method allowing the selective introduction of multiple functional groups. This study reports a ring cleavage methodology reaction for the synthesis of 2-alkyl/aryl 3-electron-withdrawing groups (esters, sulfones, and phosphonates) 5-aminoaryl/phenol pyridines via the remodeling of 3-formyl (aza)indoles/benzofurans. Totally ninety-three 5-aminoaryl pyridines and thirty-three 5-phenol pyridines were synthesized showing the robustness of the developed methodology. The application of this methodology further provided a privileged pyridine scaffold containing biologically relevant molecules and direct drug/natural product conjugation with ethyl 2-methyl nicotinate.
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Affiliation(s)
- Kannan Vaithegi
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sihyeong Yi
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ji Hyae Lee
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Begur Vasanthkumar Varun
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Seung Bum Park
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea.
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7
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Luo C, Cai M, Zhao R, Huang B. An efficient and practical synthesis of functionalized pyridines via recyclable copper-catalyzed three-component tandem cyclization. SYNTHETIC COMMUN 2023. [DOI: 10.1080/00397911.2022.2156296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Chengkai Luo
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
| | - Mingzhong Cai
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
| | - Ruonan Zhao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
| | - Bin Huang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
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8
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Patel AK, Rathor SS, Samanta S. Regioselective access to di- and trisubstituted pyridines via a metal-oxidant-solvent-free domino reaction involving 3-chloropropiophenones. Org Biomol Chem 2022; 20:6759-6765. [PMID: 35972042 DOI: 10.1039/d2ob01193j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A remarkable metal-oxidant-solvent- and base-free domino route for regioselective access to a wide range of 2,4-di- and 2,3,4/6-trisubstituted pyridines including carbo- and heterocyclic fused pyridines is reported. This [3C + 2C + 1N] cyclization reaction occurs between 3-chloropropiophenones (3C units), enolizable acyclic/cyclic ketones (2C sources) and NH4OAc as a robust N source under neat conditions under an open atmosphere, producing new C=C and C=N-C bonds in highly chemo- and regioselective manners. Interestingly, this eco-friendly method has many positive features: excellent functional group tolerance, broad substrate scope, good to excellent regioselectivities, promising yields, no-unwanted products, neutral reaction conditions and appropriateness for large-scale synthesis. Mechanism studies reveal that the in situ generated β-amino ketone from 3-chloropropiophenone and an ammonium salt undergoes C=N bond formation with a ketone followed by an intramolecular cyclization process (C=C bond), which are the decisive steps for pyridine synthesis.
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Affiliation(s)
- Ashvani Kumar Patel
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
| | - Shikha Singh Rathor
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
| | - Sampak Samanta
- Department of Chemistry, Indian Institute of Technology Indore, Simrol, 453552, India.
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9
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Oba T, Takahashi H, Roppongi M, Miyata K. 1,4,2-Diazaborole-type heterocycle from 2H-azirine-2-carboxylate and [(alkylamino)methyl]trifluoroborate. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Kumar D, Sharma H, Saha N, Chakraborti AK. Domino synthesis of functionalized pyridine carboxylates under gallium catalysis: Unravelling the reaction pathway and the role of the nitrogen source counter anion. Chem Asian J 2022; 17:e202200304. [PMID: 35608137 DOI: 10.1002/asia.202200304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/11/2022] [Indexed: 11/10/2022]
Abstract
The catalytic potential of various metal Lewis acid catalysts have been assessed to derive a high-yielding, multi-component domino synthesis of functionalized pyridines from (E)-3-(dimethylamino)-1-aryl/heteroaryl-prop-2-en-1-ones, 1,3-dicarbonyl compounds, and an ammonium salt (as the nitrogen precursor). Amongst the various metal halides, tetrafluoroborates, perchlorates, and triflates used as the catalyst GaI3 proved to be the most effective. The mechanistic course of the most plausible pathway has been outlined as the intermediate formation of imine/enamine by the reaction of the 1,3-dicarbonyl compound with ammonia (liberated in situ from the ammonium salt used as the nitrogen source), which participates in the domino nucleophilic Michael reaction to the (2E)-3-(dimethylamino)-1-aryl/hetroarylprop-2-en-1-one by its active methylene carbon through its enamine form followed by intramolecular cyclization and aromatization. The effect of different ammonium salts as the nitrogen source has been investigated and NH4OAc was found to be best. The influence of the acetate counter anion of NH4OAc on the progress of the reaction was studied and its specific role in the cyclization and subsequent aromatization has been revealed. This work offers distinct advantages compared to the literature reported methodologies on the count of several green index parameters.
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Affiliation(s)
- Dinesh Kumar
- National Institute of Pharmaceutical Education and Research, Medicinal Chemistry, Sector 67, 160062, S. A. S. Nagar, INDIA
| | - Himanshu Sharma
- National Institute of Pharmaceutical Education and Research, Medicinal Chemistry, Sector 67, 160062, S. A. S. Nagar, INDIA
| | - Nirjhar Saha
- National Institute of Pharmaceutical Education and Research, Medicinal Chemistry, Sector 67, 160062, S. A. S. Nagar, INDIA
| | - Asit Kumar Chakraborti
- National Institute of Pharmaceutical Education and Research, Medicinal Chemistry, Sector 67, 160062, S. A. S. Nagar, INDIA
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11
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Zhang Z, Liu X, Ji L, Zhang T, Jia Z, Loh TP. Metal-Free Access to (Spirocyclic)Tetrahydro-β-carbolines in Water Using an Ion-Pair as a Superacidic Precatalyst. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05546] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Zhenguo Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Xiaoxiao Liu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Liang Ji
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Ting Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Zhenhua Jia
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing, 211816, China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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12
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Wang L, Liu C, Li L, Wang X, Sun R, Zhou M, Wang H. Visible‐Light‐Promoted
[3 + 2] Cycloaddition of
2
H
‐Azirines
with Quinones: Access to Substituted Benzo[
f
]isoindole‐4,9‐diones. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202100728] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Lijia Wang
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun Liaoning 113001 China
| | - Chuang Liu
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun Liaoning 113001 China
| | - Lei Li
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun Liaoning 113001 China
| | - Xin Wang
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun Liaoning 113001 China
| | - Ran Sun
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun Liaoning 113001 China
| | - Ming‐Dong Zhou
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun Liaoning 113001 China
| | - He Wang
- School of Petrochemical Engineering Liaoning Petrochemical University Fushun Liaoning 113001 China
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13
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De A, Majee A. Synthesis of various functionalized
2
H
‐azirines: An
updated library. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Aramita De
- Department of Chemistry Visva‐Bharati (A Central University) Santiniketan India
| | - Adinath Majee
- Department of Chemistry Visva‐Bharati (A Central University) Santiniketan India
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14
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Jiang C, Wu J, Han J, Chen K, Qian Y, Zhang Z, Jiang Y. An expedient synthesis of highly functionalized 1,3-dienes by employing cyclopropenes as C4 units. Chem Commun (Camb) 2021; 57:5710-5713. [PMID: 33982703 DOI: 10.1039/d1cc01254a] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An efficient method has been described to synthesize dicarbonyl functionalized 1,3-dienes by cleaving the C[double bond, length as m-dash]C bond of enaminones with cyclopropenes in the presence of a rhodium catalyst. The acetate-substituted cyclopropenes are judiciously chosen as standard C4 units of 1,3-diene precursors. The reactions are believed to undergo a unique cutting and insertion process, involving a C[double bond, length as m-dash]C bond cleavage of the enaminone and insertion of a new C(sp2) source with the formation of two C-C single bonds. A broad range of substrates can be used to synthesize the corresponding 1,3-dienes under very mild reaction conditions, including low catalyst-loading, ambient temperature, and a neutral reaction solvent.
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Affiliation(s)
- Chengzhou Jiang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.
| | - Jiamin Wu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.
| | - Jiabin Han
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.
| | - Kai Chen
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Huaxi, Guiyang 550025, China
| | - Yang Qian
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.
| | - Zhengyu Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China.
| | - Yaojia Jiang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, College of Food Science and Light Industry, Nanjing Tech University, Nanjing 211816, China. and Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering Ministry of Education, Guizhou University, Huaxi, Guiyang 550025, China
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15
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Sujatha C, Nallagangula M, Namitharan K. Harnessing In Situ Radical Oxygenation: Copper-Catalyzed Interrupted Azirine-Alkyne Ring-Expansion Reaction for the Synthesis of Pyrrolones. Org Lett 2021; 23:4219-4223. [PMID: 34010563 DOI: 10.1021/acs.orglett.1c01162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here we report a novel interrupted azirine-alkyne ring-expansion reaction with molecular oxygen for the direct synthesis of highly functionalized pyrrolones enabled by copper catalysis. Mechanistic investigations indicate that the present three-component reaction proceeds via two copper-catalyzed sequential reactions, an azirine-ring-opening alkynylation and an amine-directed radical oxygenation, leading to the formation of interesting pyrrolone structures under mild conditions.
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Affiliation(s)
- Chandragiri Sujatha
- Organic Synthesis and Catalysis Laboratory, SRM Research Institute and Department of Chemistry, SRMIST, Kattankulathur 603 203, Tamil Nadu, India
| | - Madhu Nallagangula
- Organic Synthesis and Catalysis Laboratory, SRM Research Institute and Department of Chemistry, SRMIST, Kattankulathur 603 203, Tamil Nadu, India
| | - Kayambu Namitharan
- Organic Synthesis and Catalysis Laboratory, SRM Research Institute and Department of Chemistry, SRMIST, Kattankulathur 603 203, Tamil Nadu, India.,Amity Institute of Click Chemistry Research and Studies, Amity University, Noida 201 301, Uttar Pradesh, India
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16
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Liu B, Song Q, Liu Z, Wang Z. Silver‐Catalyzed Oxyphosphorylation of Unactivated Alkynes. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Binbin Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Department of Chemistry Northeast Normal University Changchun 130024 People's Republic of China
| | - Qingmin Song
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Department of Chemistry Northeast Normal University Changchun 130024 People's Republic of China
| | - Zhaohong Liu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Department of Chemistry Northeast Normal University Changchun 130024 People's Republic of China
| | - Zikun Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Department of Chemistry Northeast Normal University Changchun 130024 People's Republic of China
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17
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Zanakhov TO, Galenko EE, Kryukova MA, Novikov MS, Khlebnikov AA. Isomerization of 5-(2 H-Azirin-2-yl)oxazoles: An Atom-Economic Approach to 4 H-Pyrrolo[2,3- d]oxazoles. Molecules 2021; 26:molecules26071881. [PMID: 33810476 PMCID: PMC8036974 DOI: 10.3390/molecules26071881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/19/2021] [Accepted: 03/23/2021] [Indexed: 11/16/2022] Open
Abstract
An atom economical method for the preparation of variously substituted 4H-pyrrolo[2,3-d]oxazoles was developed on the basis of thermal isomerization of 5-(2H-azirin-2-yl)oxazoles. The latter were prepared by Rh2(oct)4 catalyzed reaction of 2-(3-aryl/heteroaryl)-2-diazoacetyl-2H-azirines with a set of substituted acetonitriles, benzonitriles, acrylonitrile and fumaronitrile. According to DFT calculations the transformation of 5-(2H-azirin-2-yl)oxazole to 4H-pyrrolo[2,3-d]oxazole occurs through the nitrenoid-like transition state to give a 3aH-pyrrolo[2,3-d]oxazole intermediate, followed by 1,5-H-shift.
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18
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Rakshit A, Kumar P, Alam T, Dhara H, Patel BK. Visible-Light-Accelerated Pd-Catalyzed Cascade Addition/Cyclization of Arylboronic Acids to γ- and β-Ketodinitriles for the Construction of 3-Cyanopyridines and 3-Cyanopyrrole Analogues. J Org Chem 2020; 85:12482-12504. [DOI: 10.1021/acs.joc.0c01703] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Amitava Rakshit
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Prashant Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Tipu Alam
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Hirendranath Dhara
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Bhisma K. Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
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19
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Vodnala N, Gujjarappa R, Satheesh V, Gupta R, Kaldhi D, Kabi AK, Malakar CC. Copper‐Catalyzed [2+2+1+1] Annulation for the Regioselective Synthesis of 2,6‐Diarylpyridines
via
C1‐Insertion and Subsequent Cyclization. ChemistrySelect 2020. [DOI: 10.1002/slct.202002968] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nagaraju Vodnala
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Raghuram Gujjarappa
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Vanaparthi Satheesh
- Schulich Faculty of Chemistry Technion-Israel Institute of Technology Haifa 3200003 Israel
| | - Richa Gupta
- Department of Chemistry National University of Singapore Singapore 117543 Singapore
| | - Dhananjaya Kaldhi
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Arup K. Kabi
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
| | - Chandi C. Malakar
- Department of Chemistry National Institute of Technology Manipur Langol Imphal 795004 Manipur India
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20
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Chen Y, Yang W, Wu J, Sun W, Loh TP, Jiang Y. 2H-Azirines as Potential Bifunctional Chemical Linkers of Cysteine Residues in Bioconjugate Technology. Org Lett 2020; 22:2038-2043. [DOI: 10.1021/acs.orglett.0c00415] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yang Chen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Wenjie Yang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Jiamin Wu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Wangbin Sun
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616, Singapore
| | - Yaojia Jiang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
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21
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Prakash M, Gudimella SK, Lodhi R, Guin S, Samanta S. NH 4OAc-Promoted Domino Route to Hydroxyarylated Unsymmetrical Pyridines under Neat Conditions. J Org Chem 2020; 85:2151-2167. [PMID: 31875454 DOI: 10.1021/acs.joc.9b02896] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new metal-, oxidant-, and solvent-free ecofriendly domino method has been established for modular synthesis of a diverse range of medicinally promising hydroxyarylated unsymmetrical pyridines in good to high chemical yields with an excellent regioselectivity. This domino process involves a range of N-sulfonyl ketimines as C,N-binucleophiles, enolizable ketones, and aromatic/heteroaromatic aldehydes using ammonium acetate as an ideal promoter under neat conditions, which creates two new C-C bonds and one C-N bond. Notably, the neutral reaction conditions are mild enough to tolerate a range of functionalities and cover a variety of substrates, thus bestowing a powerful avenue to access tri- and tetrasubstituted pyridines including carbo- and heterocyclic fused ones. Interestingly, a practical, scalable, and high-yielding synthesis of pyridylphenol derivatives was successfully accomplished by our unique method.
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Affiliation(s)
- Meher Prakash
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Santosh K Gudimella
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Rajni Lodhi
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Soumitra Guin
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
| | - Sampak Samanta
- Discipline of Chemistry , Indian Institute of Technology Indore , Simrol , Indore , 453552 Madhya Pradesh , India
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22
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Guin S, Gudimella SK, Samanta S. 1,6-Addition of vinyl p-quinone methides with cyclic sulfamidate imines: access to 4-hydroxyaryl-2,6-diarylpyridines. Org Biomol Chem 2020; 18:1337-1342. [DOI: 10.1039/c9ob02708d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A base-promoted 1,6-addition–cyclization reaction of vinyl para-quinone methides with cyclic sulfamidate imines in an open atmosphere is reported. This method delivers good to high yields of 2,4,6-trisubstituted pyridines with a valuable phenolic moiety at the C4-position.
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Affiliation(s)
- Soumitra Guin
- Indian Institute of Technology Indore
- Discipline of Chemistry
- Indore 453552
- India
| | | | - Sampak Samanta
- Indian Institute of Technology Indore
- Discipline of Chemistry
- Indore 453552
- India
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23
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Cheng D, Deng Z, Yan X, Wang M, Xu X, Yan J. 2,3‐Dichloro‐5,6‐Dicyano‐1,4‐Benzoquinone (DDQ)‐Mediated Tandem Oxidative Coupling/Intramolecular Annulation/Dehydro‐Aromatization for the Synthesis of Polysubstituted and Fused Pyridines. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900956] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Dongping Cheng
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310014, People's Republic of China
| | - Zhiteng Deng
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310014, People's Republic of China
| | - Xianhang Yan
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310014, People's Republic of China
| | - Mingliang Wang
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310014, People's Republic of China
| | - Xiaoliang Xu
- College of Chemical EngineeringZhejiang University of Technology Hangzhou 310014, People's Republic of China
| | - Jizhong Yan
- College of Pharmaceutical ScienceZhejiang University of Technology Hangzhou 310014, People's Republic of China
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24
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Khlebnikov AF, Novikov MS, Rostovskii NV. Advances in 2H-azirine chemistry: A seven-year update. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.03.040] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Xu F, Si XJ, Song YY, Wang XD, Liu CS, Geng PF, Du M. Palladium-Catalyzed C–N Bond Cleavage of 2H-Azirines for the Synthesis of Functionalized α-Amido Ketones. J Org Chem 2019; 84:2200-2208. [DOI: 10.1021/acs.joc.8b03193] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Fen Xu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Xiao-Ju Si
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Yuan-Yuan Song
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Xing-Dong Wang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Chun-Sen Liu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Peng-Fei Geng
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
| | - Miao Du
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China
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26
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Nongthombam GS, Borah K, Muinao T, Silla Y, Pal M, Deka Boruah HP, Boruah RC. Synthesis of D-Ring Annulated Pyridosteroids from β-Formyl Enamides and Their Biological Evaluations. ACS COMBINATORIAL SCIENCE 2019; 21:11-27. [PMID: 30576125 DOI: 10.1021/acscombsci.8b00140] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Herein, we report the synthesis of a novel class of substituted androst[17,16- b]pyridines (pyridosteroids) from the reaction of β-formyl enamides with alkynes in high yields. The optimized reaction protocol was extended to acyclic and cyclic β-formyl enamides to afford nonsteroidal pyridines. Cell survival assay of all compounds were carried against prostate cancer PC-3 cells wherein 3-hydroxy-5-en-2',3'-dicarbethoxy-androst[17,16- b]pyridine showed the highest cytotoxic activity. Phase contrast microscopy and flow cytometry studies exhibited marked morphological features characteristic of apoptosis in 3-hydroxy-5-en-2',3'-dicarbethoxy-androst[17,16- b]pyridine and abiraterone treated PC-3 cells. The treatment of 3-hydroxy-5-en-2',3'-dicarbethoxy-androst[17,16- b]pyridine induces G2/M phase cell cycle arrest in prostate cancer PC-3 cells. Enhancement of apoptotic inductions of PC-3 cells by 3-hydroxy-5-en-2',3'-dicarbethoxy-androst[17,16- b]pyridine and abiraterone through the activation of caspases-6, -7, and -8 pathways were supported by qRT-PCR. In silico study of the compound 3-hydroxy-5-en-2',3'-dicarbethoxy-androst[17,16- b]pyridine showed stable and promising interaction with the key caspase proteins. Our studies revealed that the pyridosteroid 3-hydroxy-5-en-2',3'-dicarbethoxy-androst[17,16- b]pyridine, bearing pyridine-2,3-dicarbethoxy pharmacophore, facilitated initiation of caspase-8 and activates downstream effectors caspase-6 and caspase-7 and thereby triggering apoptosis of PC-3 cancer cells.
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Affiliation(s)
- Geetmani Singh Nongthombam
- Chemical Science and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam, India 785006
| | - Kasmika Borah
- Biological Science and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam, India 785006
| | - Thingreila Muinao
- Biological Science and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam, India 785006
| | - Yumnam Silla
- Biological Science and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam, India 785006
| | - Mintu Pal
- Biological Science and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam, India 785006
| | - Hari Prasanna Deka Boruah
- Biological Science and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam, India 785006
| | - Romesh Chandra Boruah
- Chemical Science and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat, Assam, India 785006
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27
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Uredi D, Motati DR, Watkins EB. A simple, tandem approach to the construction of pyridine derivatives under metal-free conditions: a one-step synthesis of the monoterpene natural product, (−)-actinidine. Chem Commun (Camb) 2019; 55:3270-3273. [DOI: 10.1039/c9cc01097a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
(−)-Actinidine, along with various diversely substituted pyridines were synthesized from simple starting materials, including natural products, using a mild and metal-free method.
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Affiliation(s)
- Dilipkumar Uredi
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University
- Jackson
- USA
| | - Damoder Reddy Motati
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University
- Jackson
- USA
| | - E. Blake Watkins
- Department of Pharmaceutical Sciences, College of Pharmacy, Union University
- Jackson
- USA
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28
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Wang M, Hou J, Yu W, Chang J. Synthesis of 2 H-Azirines via Iodine-Mediated Oxidative Cyclization of Enamines. J Org Chem 2018; 83:14954-14961. [PMID: 30474371 DOI: 10.1021/acs.joc.8b02022] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A facile and practical oxidative cyclization reaction of enamines to 2 H-azirines has been developed, employing molecular iodine. The features of the present synthetic approach include no use of transition metals, mild reaction conditions, and simplicity of operation. Under the optimal reaction conditions, a variety of 2 H-azirine derivatives were synthesized from simple and readily accessible enamine precursors in an efficient and scalable fashion.
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Affiliation(s)
- Manman Wang
- College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou , Henan 450001 , People's Republic of China
| | - Jiao Hou
- College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou , Henan 450001 , People's Republic of China
| | - Wenquan Yu
- College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou , Henan 450001 , People's Republic of China
| | - Junbiao Chang
- College of Chemistry and Molecular Engineering , Zhengzhou University , Zhengzhou , Henan 450001 , People's Republic of China
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29
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Fu Q, Wang R, Liang F, Guan W. Aza-tricycles containing a perfluoroalkyl group: synthesis, structure and fluorescence. Org Biomol Chem 2018; 16:8950-8954. [PMID: 30452055 DOI: 10.1039/c8ob02749h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Perfluoroalkyl-containing aza-tricycles have been prepared in one synthetic operation via an ambient light-promoted three-component reaction of β-oxo esters, perfluoroalkyl iodide and DBU. Intramolecular C-FO and double C-HF weak interactions and intermolecular C-HO and C-Hπ hydrogen bondings were observed partly due to the incorporation of the perfluoroalkyl group. The perfluoroalkylated non-planar aza-tricycles exhibit interesting room-temperature AIE fluorescence and acid-induced fluorescence enhancement characters.
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Affiliation(s)
- Qiang Fu
- Department of Chemistry, Northeast Normal University, Changchun 130024, China.
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30
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Li C, Yuan J, Zhang Q, Bhujanga Rao C, Zhang R, Zhao Y, Deng B, Dong D. Oxidative Cyclization of β-Aminoacrylamides Mediated by PhIO: Chemoselective Synthesis of Isoxazoles and 2H-Azirines. J Org Chem 2018; 83:14999-15008. [DOI: 10.1021/acs.joc.8b02132] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Chaoran Li
- Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of Education, Jilin Normal University, Changchun 130103, China
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Jingwen Yuan
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Qian Zhang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Chitturi Bhujanga Rao
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Rui Zhang
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Yanning Zhao
- Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of Education, Jilin Normal University, Changchun 130103, China
| | - Bicheng Deng
- Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of Education, Jilin Normal University, Changchun 130103, China
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Dewen Dong
- Key Laboratory of Preparation and Application of Environmental Friendly Materials of the Ministry of Education, Jilin Normal University, Changchun 130103, China
- CAS Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
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31
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Shi S, Xu K, Jiang C, Ding Z. ZnCl2-Catalyzed [3 + 2] Cycloaddition of Benzimidates and 2H-Azirines for the Synthesis of Imidazoles. J Org Chem 2018; 83:14791-14796. [DOI: 10.1021/acs.joc.8b02437] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shoujie Shi
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Kang Xu
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Cheng Jiang
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Zhenhua Ding
- Jiangsu Key Laboratory of Drug Design and Optimization, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
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32
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Guin S, Gupta R, Majee D, Samanta S. DABCO- and DBU-promoted one-pot reaction of N-sulfonyl ketimines with Morita-Baylis-Hillman carbonates: a sequential approach to (2-hydroxyaryl)nicotinate derivatives. Beilstein J Org Chem 2018; 14:2771-2778. [PMID: 30498526 PMCID: PMC6244423 DOI: 10.3762/bjoc.14.254] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 10/16/2018] [Indexed: 12/25/2022] Open
Abstract
An intriguing DABCO-catalyzed and DBU-promoted one-pot synthesis of an important class of (2-hydroxyaryl)pyridine derivatives bearing a carboxylate or a nitrile group suitably placed at C3 position of the aza-ring has been achieved in acceptable chemical yields with a broad functional group tolerance. This sequential C-C/C-N bond making process proceeds through a regioselective allylic alkylation/aza-Michael reaction between MBH carbonates derived from an acrylate/acrylonitrile and N-sulfonyl ketimines as C,N-binucleophiles catalyzed by DABCO, followed by elimination of SO2 under the influence of base and subsequent aromatization in an open atmosphere.
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Affiliation(s)
- Soumitra Guin
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India
| | - Raman Gupta
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India
| | - Debashis Majee
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India
| | - Sampak Samanta
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore, 453552, Madhya Pradesh, India
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33
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Sujatha C, Bhatt CS, Ravva MK, Suresh AK, Namitharan K. Copper-Catalyzed Ring-Expansion Cascade of Azirines with Alkynes: Synthesis of Multisubstituted Pyridines at Room Temperature. Org Lett 2018; 20:3241-3244. [PMID: 29757655 DOI: 10.1021/acs.orglett.8b01090] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first intermolecular ring-expansion cascade of azirines with alkynes for the synthesis of pyridines, enabled by a copper/triethylamine catalytic system via simultaneous generation and utilization of yne-enamine and skipped-yne-imine intermediates, is reported. Experimental as well as computational mechanistic studies revealed that the role of triethylamine is crucial in deciding the reaction pathway toward the pyridine products. This process offers a novel, one-step, direct, and practical strategy for the rapid construction of highly substituted pyridines under exceedingly mild conditions, and an installed alkyne functionality.
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Affiliation(s)
- Chandragiri Sujatha
- Organic Synthesis and Catalysis Laboratory , SRM Research Institute, SRM Institute of Science and Technology , Chennai - 603203 , India
| | | | | | | | - Kayambu Namitharan
- Organic Synthesis and Catalysis Laboratory , SRM Research Institute, SRM Institute of Science and Technology , Chennai - 603203 , India.,SRM University-AP , Amaravati - 522502 , India
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34
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Ge Y, Sun W, Pei B, Ding J, Jiang Y, Loh TP. Hoveyda–Grubbs II Catalyst: A Useful Catalyst for One-Pot Visible-Light-Promoted Ring Contraction and Olefin Metathesis Reactions. Org Lett 2018; 20:2774-2777. [DOI: 10.1021/acs.orglett.8b00971] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yun Ge
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Wangbin Sun
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Bingbing Pei
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Jia Ding
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Yaojia Jiang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, P. R. China
- Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616
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35
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Wan Y, Zheng X, Ma C. Conjugated Dienyne-Imides as Robust Precursors of 1-Azatrienes for 6π Electrocyclizations to Furo[2,3-b
]dihydropyridine Cores. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800303] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yanjun Wan
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Xuchun Zheng
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Cheng Ma
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
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36
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Wan Y, Zheng X, Ma C. Conjugated Dienyne-Imides as Robust Precursors of 1-Azatrienes for 6π Electrocyclizations to Furo[2,3-b
]dihydropyridine Cores. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/anie.201800303] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yanjun Wan
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Xuchun Zheng
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
| | - Cheng Ma
- Department of Chemistry; Zhejiang University; Hangzhou 310027 China
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37
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Hsieh TH, Liao PY, Liu YT, Wang CH, Lin CC, Chien TC. Investigation of O
-Sulfonylation-promoted Heterolytic NO Bond Cleavage of Amidoximes and Ketoximes. J CHIN CHEM SOC-TAIP 2018. [DOI: 10.1002/jccs.201700104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tsung-Han Hsieh
- Department of Chemistry; National Taiwan Normal University; Taipei 11677 Taiwan
| | - Pen-Yuan Liao
- Department of Chemistry; National Taiwan Normal University; Taipei 11677 Taiwan
| | - Yu-Ting Liu
- Department of Chemistry; National Taiwan Normal University; Taipei 11677 Taiwan
| | - Chien-Hong Wang
- Department of Chemistry; National Taiwan Normal University; Taipei 11677 Taiwan
| | - Chia-Chi Lin
- Department of Chemistry; National Taiwan Normal University; Taipei 11677 Taiwan
| | - Tun-Cheng Chien
- Department of Chemistry; National Taiwan Normal University; Taipei 11677 Taiwan
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38
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Zhao MN, Ren ZH, Yang DS, Guan ZH. Iron-Catalyzed Radical Cycloaddition of 2H-Azirines and Enamides for the Synthesis of Pyrroles. Org Lett 2018; 20:1287-1290. [DOI: 10.1021/acs.orglett.7b04007] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Mi-Na Zhao
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
- Shaanxi
Key Laboratory of Phytochemistry, College of Chemistry and Chemical
Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Zhi-Hui Ren
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
| | - De-Suo Yang
- Shaanxi
Key Laboratory of Phytochemistry, College of Chemistry and Chemical
Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Zheng-Hui Guan
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University, Xi’an 710127, P. R. China
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39
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Baek Y, Maeng C, Kim H, Lee PH. Regioselective Synthesis of Indolopyrazines through a Sequential Rhodium-Catalyzed Formal [3+3] Cycloaddition and Aromatization Reaction of Diazoindolinimines with Azirines. J Org Chem 2018; 83:2349-2360. [DOI: 10.1021/acs.joc.8b00115] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yonghyeon Baek
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Chanyoung Maeng
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hyunseok Kim
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Phil Ho Lee
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Republic of Korea
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40
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Maity P, Kundu D, Ghosh T, Ranu BC. Copper catalyzed cyanation through CC bond cleavage of gem-aryl dibromide followed by second cyanation of iodoarene by a released CN unit. Org Chem Front 2018. [DOI: 10.1039/c8qo00108a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new approach for the synthesis of aryl cyanides through CC cleavage of styrenyl gem-dibromide has been achieved.
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Affiliation(s)
- Pintu Maity
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
| | - Debasish Kundu
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
| | - Tubai Ghosh
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
| | - Brindaban C. Ranu
- Department of Organic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata 700032
- India
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41
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Chen G, Wang Z, Zhang X, Fan X. Synthesis of Functionalized Pyridines via Cu(II)-Catalyzed One-Pot Cascade Reactions of Inactivated Saturated Ketones with Electron-Deficient Enamines. J Org Chem 2017; 82:11230-11237. [DOI: 10.1021/acs.joc.7b01901] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guang Chen
- School of Chemistry and Chemical Engineering,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, Henan Key Laboratory of Organic Functional Molecule
and Drug Innovation, Key Laboratory of Green Chemical Media and Reactions,
Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Ze Wang
- School of Chemistry and Chemical Engineering,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, Henan Key Laboratory of Organic Functional Molecule
and Drug Innovation, Key Laboratory of Green Chemical Media and Reactions,
Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xinying Zhang
- School of Chemistry and Chemical Engineering,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, Henan Key Laboratory of Organic Functional Molecule
and Drug Innovation, Key Laboratory of Green Chemical Media and Reactions,
Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
| | - Xuesen Fan
- School of Chemistry and Chemical Engineering,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, Henan Key Laboratory of Organic Functional Molecule
and Drug Innovation, Key Laboratory of Green Chemical Media and Reactions,
Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, China
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42
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Biswas S, Majee D, Guin S, Samanta S. Metal- and Solvent-Free Approach to Diversely Substituted Picolinates via Domino Reaction of Cyclic Sulfamidate Imines with β,γ-Unsaturated α-Ketocarbonyls. J Org Chem 2017; 82:10928-10938. [DOI: 10.1021/acs.joc.7b01792] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Soumen Biswas
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore 453552, Madhya Pradesh, India
| | - Debashis Majee
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore 453552, Madhya Pradesh, India
| | - Soumitra Guin
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore 453552, Madhya Pradesh, India
| | - Sampak Samanta
- Discipline of Chemistry, Indian Institute of Technology Indore, Simrol, Indore 453552, Madhya Pradesh, India
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43
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Sarkar D, Rout N, Ghosh MK, Giri S, Neue K, Reuter H. Atom-Economical Palladium Carbon-Catalyzed de Novo Synthesis of Trisubstituted Nicotinonitriles. J Org Chem 2017; 82:9012-9022. [PMID: 28799333 DOI: 10.1021/acs.joc.7b01332] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A de novo palladium carbon-catalyzed synthesis of trisubstituted nicotinonitriles from easily synthesized homopropagylic or homoallylic aromatic alcohols in the presence of nitriles has been explored. The mechanism proceeds with an interesting generation of a Pd(II)-C palladacycle followed by an oxidative aromatization to generate the pyridine core. The pyridine core is generated with a noteworthy C-C bond cleavage in the case of the substituted nitriles. The moderate yields and easy separation of the products lend a unique importance to this one-pot methodology.
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Affiliation(s)
- Debayan Sarkar
- Department of Chemistry, NIT Rourkela , Rourkela 769008, India
| | - Nilendri Rout
- Department of Chemistry, NIT Rourkela , Rourkela 769008, India
| | | | - Santanab Giri
- Department of Chemistry, NIT Rourkela , Rourkela 769008, India
| | - Kornelius Neue
- Institute of Chemistry of New Materials, University of Osnabrück , Barbarastraβe-6, 49074 Osnabrück, Germany
| | - Hans Reuter
- Institute of Chemistry of New Materials, University of Osnabrück , Barbarastraβe-6, 49074 Osnabrück, Germany
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44
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Synthesis of 2,3,6-trisubstituted pyridines by transition-metal free cyclization of 1,3-diynes with amino acids. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.06.080] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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45
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Guo M, Chen B, Zhu Q, Jin H, Peng Q, Kang Y. An Efficient Synthesis of Arylated Pyridines from Conjugated Acetylenes and Substituted Benzylamines Catalyzed by Base. Molecules 2017; 22:molecules22081277. [PMID: 28758981 PMCID: PMC6152059 DOI: 10.3390/molecules22081277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 07/20/2017] [Accepted: 07/29/2017] [Indexed: 11/16/2022] Open
Abstract
An efficient base-catalyzed synthesis of arylated pyridines has been disclosed. This reaction involving conjugated acetylenes and substituted benzylamines proceeded smoothly, giving rise to tri-aryl substituted pyridines which are biologically relevant compounds in good to excellent yields in N,N-dimethylformamide (DMF) under air at 140 °C with K2CO3 as catalyst.
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Affiliation(s)
- Mengping Guo
- College of Chemistry and Bio-Engineering, Yichun University, Yichun 336000, Jiangxi, China.
- Engineering Center of Jiangxi University for Lithium Energy, Yichun University, Yichun 336000, Jiangxi, China.
| | - Bo Chen
- College of Chemistry and Bio-Engineering, Yichun University, Yichun 336000, Jiangxi, China.
- Engineering Center of Jiangxi University for Lithium Energy, Yichun University, Yichun 336000, Jiangxi, China.
| | - Qiming Zhu
- College of Chemistry and Bio-Engineering, Yichun University, Yichun 336000, Jiangxi, China.
| | - Hua Jin
- College of Chemistry and Bio-Engineering, Yichun University, Yichun 336000, Jiangxi, China.
| | - Qiuling Peng
- College of Chemistry and Bio-Engineering, Yichun University, Yichun 336000, Jiangxi, China.
| | - Yanping Kang
- College of Chemistry and Bio-Engineering, Yichun University, Yichun 336000, Jiangxi, China.
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46
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Sakthivel S, Sharma A, Balamurugan R. Silver-Catalyzed Synthesis of Substituted Pyridine Derivatives from N
-Propargylic α-Enamino Esters. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700559] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shanmugam Sakthivel
- School of Chemistry; University of Hyderabad; 500046 Gachibowli, Hyderabad India
| | - Ashish Sharma
- School of Chemistry; University of Hyderabad; 500046 Gachibowli, Hyderabad India
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47
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Han J, Guo X, Liu Y, Fu Y, Yan R, Chen B. One-Pot Synthesis of Benzene and Pyridine Derivatives via
Copper-Catalyzed Coupling Reactions. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700053] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jianwei Han
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Gansu
- Key Laboratory of Nonferrous; Metal Chemistry and Resources Utilization of Gansu Province; Lanzhou 730000 People's Republic of China
| | - Xin Guo
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Gansu
- Key Laboratory of Nonferrous; Metal Chemistry and Resources Utilization of Gansu Province; Lanzhou 730000 People's Republic of China
| | - Yafeng Liu
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Gansu
- Key Laboratory of Nonferrous; Metal Chemistry and Resources Utilization of Gansu Province; Lanzhou 730000 People's Republic of China
| | - Yajie Fu
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Gansu
- Key Laboratory of Nonferrous; Metal Chemistry and Resources Utilization of Gansu Province; Lanzhou 730000 People's Republic of China
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Gansu
- Key Laboratory of Nonferrous; Metal Chemistry and Resources Utilization of Gansu Province; Lanzhou 730000 People's Republic of China
| | - Baohua Chen
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Gansu
- Key Laboratory of Nonferrous; Metal Chemistry and Resources Utilization of Gansu Province; Lanzhou 730000 People's Republic of China
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48
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Galenko AV, Shakirova FM, Galenko EE, Novikov MS, Khlebnikov AF. Fe(II)/Au(I) Relay Catalyzed Propargylisoxazole to Pyridine Isomerization: Access to 6-Halonicotinates. J Org Chem 2017; 82:5367-5379. [PMID: 28452217 DOI: 10.1021/acs.joc.7b00736] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient synthesis of methyl nicotinates/6-halonicotinates by the domino isomerization of 4-propargyl/(3-halopropargyl)-5-methoxyisoxazoles under Fe(II)/Au(I) relay catalysis was developed. It was found that FeNTf2 is an effective catalyst for first step of the domino isomerization, transformation of isoxazole to 2H-azirine, which is compatible with Ph3PAuNTf2, catalyzing the second step.
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Affiliation(s)
- Alexey V Galenko
- Saint Petersburg State University , Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia
| | - Firuza M Shakirova
- Saint Petersburg State University , Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia
| | - Ekaterina E Galenko
- Saint Petersburg State University , Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia
| | - Mikhail S Novikov
- Saint Petersburg State University , Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia
| | - Alexander F Khlebnikov
- Saint Petersburg State University , Institute of Chemistry, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia
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49
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Li X, Yu H, Huang Y. Amine-Triggered 6π-Electrocyclization-Aromatization Cascade of Ynedienamines. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601146] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Xijian Li
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University; Shenzhen Graduate School; Shenzhen 518055 People's Republic of China
- Institute of Materials; China Academy of Engineering Physics, Jiangyou, Mianyang; Sichuan 621907 People's Republic of China
| | - Huidong Yu
- Rongene Pharma Co., Ltd., Shenzhen; Guangdong 518054 People's Republic of China
| | - Yong Huang
- Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University; Shenzhen Graduate School; Shenzhen 518055 People's Republic of China
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50
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Wang S, Guo YQ, Ren ZH, Wang YY, Guan ZH. K 2CO 3-Mediated Cyclization and Rearrangement of γ,δ-Alkynyl Oximes To Form Pyridols. Org Lett 2017; 19:1574-1577. [PMID: 28290703 DOI: 10.1021/acs.orglett.7b00389] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A novel K2CO3-mediated cyclization and rearrangement of γ,δ-alkynyl oximes for the synthesis of pyridols is described. The process accomplishes an efficient [1,3] rearrangement of the O-vinyl oxime intermediate which is in situ generated from the intramolecular nucleophilic addition of γ,δ-alkynyl oximes. The reaction employs readily accessible starting materials, tolerates a wide range of functional groups, and gives a variety of synthetically challenging pyridols in good yields.
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Affiliation(s)
- Shun Wang
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Yong-Qiang Guo
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Zhi-Hui Ren
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Yao-Yu Wang
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
| | - Zheng-Hui Guan
- Key Laboratory of Synthetic and Nature Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science, Northwest University , Xi'an 710127, P. R. China
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