1
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Ma LL, Zhou Y, Tang YX, Chen T, Wang ZH, Wu YD, Wang JG, Wu AX. I 2-DMSO-Mediated Construction of 2,3- and 2,4-Disubstituted Pyrimido[1,2- b]indazole Skeletons. J Org Chem 2024; 89:3941-3953. [PMID: 38421294 DOI: 10.1021/acs.joc.3c02761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
An efficient synthetic method for constructing 2,3- and 2,4-disubstituted pyrimidio[1,2-b]indazole skeletons through I2-DMSO-mediated and substrate-controlled regioselective [4 + 2] cyclization is reported. The reaction conditions are mild, its operation is simple, and the substrate scope is wide. More than 60 pyrimidio[1,2-b]indazole derivatives have been synthesized, providing a new methodology for constructing related molecules and potentially enriching bioactive-molecule libraries.
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Affiliation(s)
- Lin-Lin Ma
- School of Chemical Engineering, Guizhou Minzu University, Guiyang, Guizhou 550025, P. R. China
| | - You Zhou
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Yong-Xing Tang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Ting Chen
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Zheng-Hao Wang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Yan-Dong Wu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
| | - Jun-Gang Wang
- School of Chemical Engineering, Guizhou Minzu University, Guiyang, Guizhou 550025, P. R. China
| | - An-Xin Wu
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
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2
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Yaragorla S, Ithu SR, Arun D, Srivardhan V. Calcium-Catalyzed Synthesis of Fused Furo[2,3- b]furans and Substituted Furans from 2-Oxo Aldehydes and Cyclic Enols. J Org Chem 2023. [PMID: 38039073 DOI: 10.1021/acs.joc.3c01508] [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
We report here an atom-economical, syn-diastereoselective synthesis of naphtho-fused furo[2,3-b]furans along with naphthofurans at room temperature using readily available 2-naphthols and 2-oxo aldehydes using an alkaline earth catalyst [Ca(OTf)2]. 2-Oxo aldehydes having both aryl and alkyl substitutions reacted well. A good number of arenols responded to give fused furans, but selected arenols gave only furofurans. Synthetic applications and gram-scale synthesis were also demonstrated to strengthen this strategy.
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Affiliation(s)
- Srinivasarao Yaragorla
- School of Chemistry, University of Hyderabad, P.O. Central University, Gachibowli, Hyderabad 500046, India
| | - Sanyasi Rao Ithu
- School of Chemistry, University of Hyderabad, P.O. Central University, Gachibowli, Hyderabad 500046, India
| | - Doma Arun
- School of Chemistry, University of Hyderabad, P.O. Central University, Gachibowli, Hyderabad 500046, India
| | - Valmuri Srivardhan
- School of Chemistry, University of Hyderabad, P.O. Central University, Gachibowli, Hyderabad 500046, India
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3
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Zhou Y, Lei SG, Wang LS, Ma JT, Yu ZC, Wu YD, Wu AX. I 2-Promoted gem-Diarylethene Involved Aza-Diels-Alder Reaction and Wagner-Meerwein Rearrangement: Construction of 2,3,4-Trisubstituted Pyrimido[1,2- b]indazole Skeletons. Org Lett 2023; 25:3386-3390. [PMID: 37154544 DOI: 10.1021/acs.orglett.3c00886] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A [3 + 1 + 2] cyclization-rearrangement reaction scheme was developed to synthesize pyrimido[1,2-b]indazoles from aryl methyl ketones, 3-aminoindazoles, and gem-diarylethenes. This metal-free process proceeds via a sequential aza-Diels-Alder reaction and Wagner-Meerwein rearrangement, and a possible reaction mechanism was demonstrated based on control experiments. This method exhibits good substrate compatibility and allows simple reaction conditions. Moreover, the products display significant aggregation-induced emission characteristics after simple modifications.
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Affiliation(s)
- You Zhou
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - Shuang-Gui Lei
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - Li-Sheng Wang
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - Jin-Tian Ma
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - Zhi-Cheng Yu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - Yan-Dong Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - An-Xin Wu
- Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
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4
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Limantseva RM, Savchenko RG, Odinokov VN, Tolstikov AG. Povarov Reaction in the Synthesis of Polycyclic Compounds with a Tetrahydroquinoline Fragment. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428022120235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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5
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Yaragorla S, Arun D. Arylation and Aryne Insertion into C-Acylimines: A Simple, Flexible, and Divergent Synthesis of C2-Aryl Indoles. J Org Chem 2022; 87:14250-14263. [PMID: 36219251 DOI: 10.1021/acs.joc.2c01753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We reveal a direct strategy for the flexible synthesis of C2-aryl/heteroaryl indoles without transition metal catalysts. The synthesis involves a one-pot, four-component reaction of readily available starting materials to offer diversity around the indole moiety with a broad substrate scope and high yields. The reaction proceeds via the Friedel-Crafts C-arylation of C-acylimine formed in situ, followed by N-arylation with aryne, a formal [3+2] cycloaddition, and a subsequent aromatization cascade.
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Affiliation(s)
- Srinivasarao Yaragorla
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India
| | - Doma Arun
- School of Chemistry, University of Hyderabad, P.O. Central University, Hyderabad 500046, India
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6
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Pareek A, Singh G, Yaragorla S. Synthetic Applications of Ambiphilic C‐Acylimines in Organic Synthesis. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200395] [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)
| | - Garima Singh
- University of Hyderabad School of Chemistry Chemistry INDIA
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7
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de Fátima Â, Fernandes SA, Ferreira de Paiva W, de Freitas Rego Y. The Povarov Reaction: A Versatile Method to Synthesize Tetrahydroquinolines, Quinolines and Julolidines. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1794-8355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractThe multicomponent Povarov reaction represents a powerful approach for the construction of substances containing N-heterocyclic frameworks. By using the Povarov reaction, in addition to accessing tetrahydroquinolines, quinolines and julolidines in a single step, it is possible to form the following new bonds: two Csp
3–Csp
3 and one Csp
3–Nsp
3, two Csp
2–Csp
2 and one Csp
2–Nsp
2, and four Csp
3–Csp
3 and two Csp
3–Nsp
1, respectively. This short review discusses the main features of the Povarov reaction, including its mechanism, the reaction scope by employing different catalysts and substrates, as well as stereoselective versions.1 Introduction2 Mechanism of the Povarov Reaction3 Tetrahydroquinolines4 Quinolines5 Julolidines6 Concluding Remarks
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Affiliation(s)
- Ângelo de Fátima
- Departamento de Química, ICEx, Universidade Federal de Minas Gerais
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8
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Xiang Y, Luo P, Hao T, Xiong W, Song X, Ding Q. Copper-mediated formal [5+1] annulation of 2-vinylanilines and glyoxylic acid: A facile approach for the synthesis of 4-arylated quinolines. Tetrahedron 2021. [DOI: 10.1016/j.tet.2020.131832] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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9
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Chakraborty B, Kar A, Chanda R, Jana U. Application of the Povarov Reaction in Biaryls under Iron Catalysis for the General Synthesis of Dibenzo[ a, c]Acridines. J Org Chem 2020; 85:9281-9289. [PMID: 32588630 DOI: 10.1021/acs.joc.0c01300] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A modified Povarov reaction involving 2'-alkynylbiaryl-2-carbaldehydes and aryl amines with tandem oxidation was performed using catalytic FeCl3. The outcome was an efficient general synthesis of dibenzo[a,c]acridines with moderate to high yields. This method offers simplicity in the preparation of substrates, diverse substrate scope, and high atom economy. The generality of the protocol was verified by synthesizing a tribenzo[a,c,h]acridine derivative. Photophysical properties of the synthesized compounds were also studied. The compounds absorb UV light typically in the range 230-330 nm and emit in the visible range of 400-420 nm.
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Affiliation(s)
- Baitan Chakraborty
- Department of Chemistry, Jadavpur University, Kolkata 700032, West Bengal, India
| | - Abhishek Kar
- Department of Chemistry, Jadavpur University, Kolkata 700032, West Bengal, India
| | - Rupsa Chanda
- Department of Chemistry, Jadavpur University, Kolkata 700032, West Bengal, India
| | - Umasish Jana
- Department of Chemistry, Jadavpur University, Kolkata 700032, West Bengal, India
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10
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Vannada J, Sulthan M, Arun D, Dada R, Yaragorla S. Regiodivergent Synthesis of Penta-Substituted Pyrroles through a Cascade [3 + 2] Cyclization of C-Acylimines with Activated Alkynes and Aromatic Nucleophiles. J Org Chem 2020; 85:6697-6708. [PMID: 32319282 DOI: 10.1021/acs.joc.0c00712] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Highly robust one-pot, four-component cascade cyclization reaction of α-keto aldehydes, anilines, activated alkynes, and aromatic nucleophiles is developed to synthesize a diverse range of pharmaceutically important penta-substituted pyrroles. The reaction proceeds through the cascade cyclization of acylimines (in situ formed) with activated alkynes and aromatic nucleophiles such as indoles, pyrroles, and naphthols at room temperature under calcium(II) catalysis with high yields and broad substrate diversity.
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Affiliation(s)
- Jagadeshwar Vannada
- University College of Science, Osmania University, Saifabad, Hyderabad 500004, India
| | - Mahesh Sulthan
- School of Chemistry, University of Hyderabad, P.O.Central University, Hyderabad 500046, India.,University College of Science, Osmania University, Saifabad, Hyderabad 500004, India
| | - Doma Arun
- School of Chemistry, University of Hyderabad, P.O.Central University, Hyderabad 500046, India
| | - Ravikrishna Dada
- School of Chemistry, University of Hyderabad, P.O.Central University, Hyderabad 500046, India
| | - Srinivasarao Yaragorla
- School of Chemistry, University of Hyderabad, P.O.Central University, Hyderabad 500046, India
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11
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Peña-Solórzano D, Kouznetsov VV, Ochoa-Puentes C. Physicochemical properties of a urea/zinc chloride eutectic mixture and its improved effect on the fast and high yield synthesis of indeno[2,1- c]quinolines. NEW J CHEM 2020. [DOI: 10.1039/d0nj01342k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An environmentally friendly and efficient method for the synthesis of indeno[2,1-c]quinolines is developed using a urea/zinc chloride eutectic mixture as a green mildly acidic medium.
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Affiliation(s)
- Diana Peña-Solórzano
- Laboratorio de Síntesis Orgánica Sostenible
- Departamento de Química
- Universidad Nacional de Colombia–Sede Bogotá
- Bogotá
- Colombia
| | - Vladimir V. Kouznetsov
- Laboratorio de Química Orgánica y Biomolecular
- CMN
- Universidad Industrial de Santander. Parque Tecnológico Guatiguará
- Piedecuesta 681011
- Colombia
| | - Cristian Ochoa-Puentes
- Laboratorio de Síntesis Orgánica Sostenible
- Departamento de Química
- Universidad Nacional de Colombia–Sede Bogotá
- Bogotá
- Colombia
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12
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Sun Y, Hu M, Fu S, Liu B. Recent advances in alkaline earth metal-enabled syntheses of heterocyclic compounds. Org Biomol Chem 2020; 18:6443-6466. [DOI: 10.1039/d0ob01233e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review summarizes recent progress in alkaline earth metal enabled syntheses of heterocyclic compounds.
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Affiliation(s)
- Ying Sun
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
| | - Mengqin Hu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
| | - Shaomin Fu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- PR China
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13
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Dada R, Sulthan M, Yaragorla S. Calcium-Catalyzed Stereoselective Tandem [4+2] and [3+2] Annulation Reaction for the Synthesis of Dihydropyrrolo[1,2- a]quinolines. Org Lett 2019; 22:279-283. [PMID: 31854991 DOI: 10.1021/acs.orglett.9b04293] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Calcium-catalyzed highly facile one-pot, A4 annulation of aldehyde, amine, alkene, and alkyne to form fused 4,5-dihydropyrrolo[1,2-a]quinolines with exclusive syn diastereoselectivity is reported. This selectivity arises from an inverse electron demand [4+2] aza-Diels-Alder cycloaddition, and the adduct further undergoes a formal [3+2] cyclization with activated alkynes. This diversity-oriented protocol is highly general and furnishes the dihydropyrrolo[1,2-a]quinoline derivatives with a broad substrate scope in good to excellent yields.
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Affiliation(s)
- Ravikrishna Dada
- School of Chemistry , University of Hyderabad , P.O. Central University, Gachibowli, Hyderabad 500046 , India
| | - Mahesh Sulthan
- School of Chemistry , University of Hyderabad , P.O. Central University, Gachibowli, Hyderabad 500046 , India
| | - Srinivasarao Yaragorla
- School of Chemistry , University of Hyderabad , P.O. Central University, Gachibowli, Hyderabad 500046 , India
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14
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More DA, Shinde GH, Shaikh AC, Muthukrishnan M. Oxone promoted dehydrogenative Povarov cyclization of N-aryl glycine derivatives: an approach towards quinoline fused lactones and lactams. RSC Adv 2019; 9:30277-30291. [PMID: 35530246 PMCID: PMC9072217 DOI: 10.1039/c9ra06212b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 09/17/2019] [Indexed: 11/21/2022] Open
Abstract
Oxone promoted intramolecular dehydrogenative imino Diels–Alder reaction (Povarov cyclization) of alkyne tethered N-aryl glycine esters and amides has been explored, thus affording biologically significant quinoline fused lactones and lactams.
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Affiliation(s)
- Devidas A. More
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Ganesh H. Shinde
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - Aslam C. Shaikh
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
| | - M. Muthukrishnan
- Division of Organic Chemistry
- CSIR-National Chemical Laboratory
- Pune 411008
- India
- Academy of Scientific and Innovative Research (AcSIR)
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