1
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Meena M, Malviya BK, Singh K, Yadav P, Naharwal P, Kumari N, Verma VP, Yadav DK, Sharma S. I
2
/FeCl
3
Promoted Cascade Reaction of 4‐Quinazolinone, Pyridine, and Chalcone for the Synthesis of Indolizines. ChemistrySelect 2022. [DOI: 10.1002/slct.202201378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mahesh Meena
- Department of Chemistry Mohanlal Sukhadia University Udaipur 313001 India
| | - Bhanwar K. Malviya
- Department of Chemistry Mohanlal Sukhadia University Udaipur 313001 India
| | - Karandeep Singh
- Department of Chemistry Mohanlal Sukhadia University Udaipur 313001 India
| | - Priyanka Yadav
- Department of Chemistry Banasthali University Newai-Jodhpuriya Road Vanasthali
| | - Pankaj Naharwal
- Department of Chemistry Mohanlal Sukhadia University Udaipur 313001 India
| | - Neetu Kumari
- Department of Chemistry Mohanlal Sukhadia University Udaipur 313001 India
| | - Ved Prakash Verma
- Department of Chemistry Banasthali University Newai-Jodhpuriya Road Vanasthali
| | - Dinesh K. Yadav
- Department of Chemistry Mohanlal Sukhadia University Udaipur 313001 India
| | - Siddharth Sharma
- Department of Chemistry Mohanlal Sukhadia University Udaipur 313001 India
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2
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Badaro JSA, Koszarna B, Bousquet M, Ouellette ET, Jacquemin D, Gryko DT. The Kröhnke synthesis of benzo[a]indolizines revisited: towards small, red light emitters. Org Chem Front 2022. [DOI: 10.1039/d2qo00097k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Benzo[a]indolizines with an ordered arrangement of various electron-withdrawing substituents (NO2, CF3, CN, CO2R and COPh) were prepared directly from pyridinium salts and chloronitroarenes, allowing for refined control of the photophysical...
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3
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Feng X, Tian J, Sun Y, Hu H, Lu M, Kan Y, Fang D, Wang C. Weakly coordinating group directed rhodium-catalyzed unconventional site-selective C–H olefination of indolizines at the 8-position. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.02.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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4
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Şahin N, Gürbüz N, Karabıyık H, Karabıyık H, Özdemir İ. Arylation of heterocyclic compounds by benzimidazole-based N-heterocyclic carbene-palladium(II) complexes. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2019.121076] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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5
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Luo N, Li M, Wang T, Li Y, Wang C. Highly Efficient Synthesis of 1‐Nitroindolizine Derivatives via the DBU/Acetic Acid System. ChemistrySelect 2019. [DOI: 10.1002/slct.201902621] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Naili Luo
- School of Chemistry and Chemical EngineeringYangzhou University 180 Siwangting Street Yangzhou 225002 P. R. China
| | - Mingshuang Li
- School of Chemistry and Chemical EngineeringYangzhou University 180 Siwangting Street Yangzhou 225002 P. R. China
| | - Ting Wang
- School of Chemistry and Chemical EngineeringYangzhou University 180 Siwangting Street Yangzhou 225002 P. R. China
| | - Yanxiang Li
- School of PharmacyTaizhou Polytechnic College Taizhou 225300 P. R. China
| | - Cunde Wang
- School of Chemistry and Chemical EngineeringYangzhou University 180 Siwangting Street Yangzhou 225002 P. R. China
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6
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Rathnamalala CSL, Gayton JN, Dorris AL, Autry SA, Meador W, Hammer NI, Delcamp JH, Scott CN. Donor-Acceptor-Donor NIR II Emissive Rhodindolizine Dye Synthesized by C-H Bond Functionalization. J Org Chem 2019; 84:13186-13193. [PMID: 31479270 DOI: 10.1021/acs.joc.9b01860] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A NIR II emissive dye was synthesized by the C-H bond functionalization of 1-methyl-2-phenylindolizine with 3,6-dibromoxanthene. The rhodindolizine (RhIndz) spirolactone product was nonfluorescent; however, upon opening of the lactone ring by the formation of the ethyl ester derivative, the fluorophore absorbs at 920 nm and emits at 1092 nm, which are both in the NIR II region. In addition, 4-cyanophenyl- (CNRhIndz) and 4-methoxyphenyl-substituted rhodindolizine (MeORhIndz) could also be prepared by the C-H activation reaction.
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Affiliation(s)
- Chathuranga S L Rathnamalala
- Department of Chemistry, Hand Lab 1115 , Mississippi State University , Mississippi State , Mississippi 39762 , United States
| | - Jacqueline N Gayton
- Department of Chemistry and Biochemistry, Coulter Hall , University of Mississippi , University , Mississippi 38677 , United States
| | - Austin L Dorris
- Department of Chemistry and Biochemistry, Coulter Hall , University of Mississippi , University , Mississippi 38677 , United States
| | - Shane A Autry
- Department of Chemistry and Biochemistry, Coulter Hall , University of Mississippi , University , Mississippi 38677 , United States
| | - William Meador
- Department of Chemistry and Biochemistry, Coulter Hall , University of Mississippi , University , Mississippi 38677 , United States
| | - Nathan I Hammer
- Department of Chemistry and Biochemistry, Coulter Hall , University of Mississippi , University , Mississippi 38677 , United States
| | - Jared H Delcamp
- Department of Chemistry and Biochemistry, Coulter Hall , University of Mississippi , University , Mississippi 38677 , United States
| | - Colleen N Scott
- Department of Chemistry, Hand Lab 1115 , Mississippi State University , Mississippi State , Mississippi 39762 , United States
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7
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Kumpulainen ETT, Högnäsbacka A. Modular Approach to Tricyclic Heterocycles through Copper Catalysis and Functionalization by Palladium-Catalyzed C-H Arylation. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700356] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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8
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Nakayama A, Nishio S, Otani A, Mera A, Osawa A, Tanino K, Namba K. Substituent Effect at the C4-Position of 1,3a,6a-Triazapentalene. Chem Pharm Bull (Tokyo) 2017; 64:830-7. [PMID: 27373639 DOI: 10.1248/cpb.c16-00196] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Various 2,4-disubstituted-1,3a,6a-triazapentalenes possessing methyl and phenyl groups at the C4-position were synthesized. Fluorescence observation of the synthetic 4-methyl- and 4-phenyl-1,3a,6a-triazapentalenes revealed that the introduction of a substituent at the C4-position allowed a long-wavelength shift of the fluorescence maximum. Furthermore, the phenyl group at the C4-position was found to induce a substantial increase in the extinction coefficient value.
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9
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FeCl3-catalyzed formation of indolizine derivatives via the 1,3-dipolar cycloaddition reaction between azomethine ylides and chalcones or dibenzylideneacetones. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.07.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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10
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Wang C, Jia H, Li Z, Zhang H, Zhao B. Palladium-catalyzed C-3 desulfitative arylation of indolizines with sodium arylsulfinates and arylsulfonyl hydrazides. RSC Adv 2016. [DOI: 10.1039/c5ra25504j] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Derivatized indolizines were efficiently prepared by direct C-3 arylation of indolizines using sodium arylsulfinates and arylsulfonyl hydrazides in good yields.
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Affiliation(s)
- Chunjie Wang
- College of Chemistry and Chemical Engineering
- Zhoukou Normal University
- Zhoukou
- China
| | - Huali Jia
- College of Chemistry and Chemical Engineering
- Zhoukou Normal University
- Zhoukou
- China
| | - Zhiwei Li
- College of Chemistry and Chemical Engineering
- Zhoukou Normal University
- Zhoukou
- China
| | - Hui Zhang
- College of Chemistry and Chemical Engineering
- Zhoukou Normal University
- Zhoukou
- China
| | - Baoli Zhao
- Institute of Applied Chemistry and Department of Chemistry
- Shaoxing University
- Shaoxing
- China
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11
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Popa MM, Georgescu E, Draghici C, Georgescu F, Dumitrascu F, Dumitrescu D. Coumarin substituted pyrrolo-fused heterocyclic systems by 1,3-dipolar cycloadditon reactions. MONATSHEFTE FUR CHEMIE 2015. [DOI: 10.1007/s00706-015-1563-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Popa MM, Georgescu E, Caira MR, Georgescu F, Draghici C, Stan R, Deleanu C, Dumitrascu F. Indolizines and pyrrolo[1,2-c]pyrimidines decorated with a pyrimidine and a pyridine unit respectively. Beilstein J Org Chem 2015. [PMID: 26199663 PMCID: PMC4505085 DOI: 10.3762/bjoc.11.121] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The three possible structural isomers of 4-(pyridyl)pyrimidine were employed for the synthesis of new pyrrolo[1,2-c]pyrimidines and new indolizines, by 1,3-dipolar cycloaddition reaction of their corresponding N-ylides generated in situ from their corresponding cycloimmonium bromides. In the case of 4-(3-pyridyl)pyrimidine and 4-(4-pyridyl)pyrimidine the quaternization reactions occur as expected at the pyridine nitrogen atom leading to pyridinium bromides and consequently to new indolizines via the corresponding pyridinium N-ylides. However, in the case of 4-(2-pyridyl)pyrimidine the steric hindrance directs the reaction to the pyrimidinium N-ylides and, subsequently, to the formation of the pyrrolo[1,2-c]pyrimidines. The new pyrrolo[1,2-c]pyrimidines and the new indolizines were structurally characterized through NMR spectroscopy. The X-ray structures of two of the starting materials, 4-(2-pyridyl)pyrimidine and 4-(4-pyridyl)pyrimidine, are also reported.
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Affiliation(s)
- Marcel Mirel Popa
- Center for Organic Chemistry C.D. Nenitzescu, Romanian Academy, Spl. Independentei 202B, Bucharest 060023, Romania ; Faculty of Applied Chemistry and Materials Science, 'Politehnica' University of Bucharest, Polizu Street 1-7, 011061 Bucharest, Romania
| | - Emilian Georgescu
- Research Center Oltchim, Str. Uzinei 1, RO 240050, Ramnicu Valcea, Romania
| | - Mino R Caira
- Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
| | - Florentina Georgescu
- Research Dept., Teso Spec SRL, Str. Muncii 53, RO-915200 Fundulea, Calarasi, Romania
| | - Constantin Draghici
- Center for Organic Chemistry C.D. Nenitzescu, Romanian Academy, Spl. Independentei 202B, Bucharest 060023, Romania
| | - Raluca Stan
- Faculty of Applied Chemistry and Materials Science, 'Politehnica' University of Bucharest, Polizu Street 1-7, 011061 Bucharest, Romania
| | - Calin Deleanu
- Center for Organic Chemistry C.D. Nenitzescu, Romanian Academy, Spl. Independentei 202B, Bucharest 060023, Romania
| | - Florea Dumitrascu
- Center for Organic Chemistry C.D. Nenitzescu, Romanian Academy, Spl. Independentei 202B, Bucharest 060023, Romania
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13
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Zhang W, Liu F, Zhao B. Desulfitative palladium-catalyzed direct C-3 arylation of indolizines with arylsulfonyl chlorides. Appl Organomet Chem 2015. [DOI: 10.1002/aoc.3326] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Wei Zhang
- Department of Chemistry and Chemical Engineering; Xinxiang University; Xinxiang Henan Province 453003 China
| | - Fang Liu
- Life Science Research Center; Hebei North University; Zhangjiakou Hebei Province 075000 China
| | - Baoli Zhao
- Institute of Applied Chemistry and Department of Chemistry; Shaoxing University; Shaoxing Zhejiang Province 312000 China
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14
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Sun J, Wang F, Shen Y, Zhi H, Wu H, Liu Y. Palladium-catalyzed direct and regioselective C–H acyloxylation of indolizines. Org Biomol Chem 2015; 13:10236-43. [DOI: 10.1039/c5ob01359c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A direct and highly regioselective C1-acyloxylation of indolizines was developed via palladium-catalyzed C–H functionalization. In this reaction, the regioselectivity was achieved in the absence of a directing group.
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Affiliation(s)
- Jinwei Sun
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials and Institute of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Fuyao Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials and Institute of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Yongmiao Shen
- School of Chemistry and Chemical Engineering
- Shaoxing University
- Shaoxing
- P. R. China
| | - Huizhen Zhi
- School of Chemistry and Material Science
- Nanjing Normal University
- Nanjing
- P. R. China
| | - Hui Wu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials and Institute of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
| | - Yun Liu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials and Institute of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou 221116
- P. R. China
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15
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Wang C, Hu H, Xu J, Kan W. One-pot synthesis of indolizine via 1,3-dipolar cycloaddition using a sub-equivalent amount of K2Cr2O7 as an efficient oxidant under base free conditions. RSC Adv 2015. [DOI: 10.1039/c5ra06019b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
X = Cl or Br; EWG1, EWG2 = electron withdrow group, one-pot reaction, 29 examples, yields from moderate to high, gram scale-up potential confirmed.
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Affiliation(s)
- Chao Wang
- School of Material Science and Engineering
- Southwest University of Science and Technology
- Mianyang 621010
- P. R. China
| | - Huayou Hu
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials
- School of Chemistry and Chemical Engineering
- Huaiyin Normal University
- Huaian 223300
- P. R. China
| | - Juanfang Xu
- School of Material Science and Engineering
- Southwest University of Science and Technology
- Mianyang 621010
- P. R. China
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials
| | - Weiqiu Kan
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials
- School of Chemistry and Chemical Engineering
- Huaiyin Normal University
- Huaian 223300
- P. R. China
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El Kazzouli S, Koubachi J, El Brahmi N, Guillaumet G. Advances in direct C–H arylation of 5,5- 6,5- and 6,6-fused-heterocycles containing heteroatoms (N, O, S). RSC Adv 2015. [DOI: 10.1039/c4ra15384g] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This report aims to review the advances made in C–H arylation of 5,6, 6,6 and 5,5 fused-heterocyclic systems.
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Affiliation(s)
- Saïd El Kazzouli
- Euromed Research Institute
- Engineering Division
- Euro-Mediterranean University of Fes (UEMF)
- 30070 Fès
- Morocco
| | - Jamal Koubachi
- Faculté Polydisciplinaire de Taroudant
- Université Ibn Zohr d'Agadir
- 83000 Taroudant
- Morocco
| | - Nabil El Brahmi
- Euromed Research Institute
- Engineering Division
- Euro-Mediterranean University of Fes (UEMF)
- 30070 Fès
- Morocco
| | - Gérald Guillaumet
- Institut de Chimie Organique et Analytique (ICOA)
- Université d'Orleans
- UMR CNRS 7311
- 45067 Orléans Cedex 2
- France
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17
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Saoudi B, Debache A, Soulé JF, Doucet H. Synthesis of heteroarenes dyads from heteroarenes and heteroarylsulfonyl chlorides via Pd-catalyzed desulfitative C–H bond heteroarylations. RSC Adv 2015. [DOI: 10.1039/c5ra07762a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
We report palladium-catalyzed synthesis of heteroarenes dyads using heteroarylsulfonyl chlorides as coupling partners. The C–H bond functionalizations occurred at α-position with pyrroles and furans, while at β-position with thiophenes.
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Affiliation(s)
- Besma Saoudi
- Institut des Sciences Chimiques de Rennes
- UMR 6226 CNRS-Université de Rennes 1 “Organométalliques, Matériaux et Catalyse”
- Campus de Beaulieu
- 35042 Rennes
- France
| | - Adbelmadjid Debache
- Laboratoire de synthèse des molecules à intérêt biologique Université Mentouri-Constantine
- 25000 Constantine
- Algeria
| | - Jean-François Soulé
- Institut des Sciences Chimiques de Rennes
- UMR 6226 CNRS-Université de Rennes 1 “Organométalliques, Matériaux et Catalyse”
- Campus de Beaulieu
- 35042 Rennes
- France
| | - Henri Doucet
- Institut des Sciences Chimiques de Rennes
- UMR 6226 CNRS-Université de Rennes 1 “Organométalliques, Matériaux et Catalyse”
- Campus de Beaulieu
- 35042 Rennes
- France
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18
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Jung Y, Kim I. C3 functionalization of indolizines via In(iii)-catalyzed three-component reaction. Org Biomol Chem 2015; 13:10986-94. [DOI: 10.1039/c5ob01657f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Post-functionalization at the C3 position of indolizines via In(iii)-catalyzed three-component coupling reaction with amines and aldehydes allowed rapid access to a new class of indolizines with diverse functional groups at the C3 position in good to excellent yields.
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Affiliation(s)
- Youngeun Jung
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences
- Yonsei University
- Incheon 406-840
- Republic of Korea
| | - Ikyon Kim
- College of Pharmacy and Yonsei Institute of Pharmaceutical Sciences
- Yonsei University
- Incheon 406-840
- Republic of Korea
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Belkessam F, Mohand A, Soulé JF, Elias A, Doucet H. Palladium-catalyzed 2,5-diheteroarylation of 2,5-dibromothiophene derivatives. Beilstein J Org Chem 2014; 10:2912-9. [PMID: 25550758 PMCID: PMC4273267 DOI: 10.3762/bjoc.10.309] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 11/27/2014] [Indexed: 12/14/2022] Open
Abstract
Conditions allowing the one pot 2,5-diheteroarylation of 2,5-dibromothiophene derivatives in the presence of palladium catalysts are reported. Using KOAc as the base, DMA as the solvent and only 0.5–2 mol % palladium catalysts, the target 2,5-diheteroarylated thiophenes were obtained in moderate to good yields and with a wide variety of heteroarenes such as thiazoles, thiophenes, furans, pyrroles, pyrazoles or isoxazoles. Moreover, sequential heteroarylation reactions allow the access to 2,5-diheteroarylated thiophenes bearing two different heteroaryl units.
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Affiliation(s)
- Fatma Belkessam
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes, "Organométalliques: Matériaux et Catalyse", Campus de Beaulieu, 35042 Rennes, France, Tel.: 00-33-2-23-23-63-84, Fax 00-33-2-23-23-69-39 ; Département de chimie, Tizi Ouzou University, BP 17 RP 15000 Tizi-Ouzou, Algeria
| | - Aidene Mohand
- Département de chimie, Tizi Ouzou University, BP 17 RP 15000 Tizi-Ouzou, Algeria
| | - Jean-François Soulé
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes, "Organométalliques: Matériaux et Catalyse", Campus de Beaulieu, 35042 Rennes, France, Tel.: 00-33-2-23-23-63-84, Fax 00-33-2-23-23-69-39
| | - Abdelhamid Elias
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes, "Organométalliques: Matériaux et Catalyse", Campus de Beaulieu, 35042 Rennes, France, Tel.: 00-33-2-23-23-63-84, Fax 00-33-2-23-23-69-39 ; Département de chimie, Tizi Ouzou University, BP 17 RP 15000 Tizi-Ouzou, Algeria
| | - Henri Doucet
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes, "Organométalliques: Matériaux et Catalyse", Campus de Beaulieu, 35042 Rennes, France, Tel.: 00-33-2-23-23-63-84, Fax 00-33-2-23-23-69-39
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7,8,9,10-Tetrahydropyrrolo[2,1-a]isoquinolines in the search for new indolizine derivatives. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.08.054] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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22
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Wang F, Shen Y, Hu H, Wang X, Wu H, Liu Y. Copper(II)-catalyzed indolizines formation followed by dehydrogenative functionalization cascade to synthesize 1-bromoindolizines. J Org Chem 2014; 79:9556-66. [PMID: 25233481 DOI: 10.1021/jo501626b] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A one-pot, three-component cascade reaction between pyridine, α-acylmethylbromide, and maleic anhydride leading to direct access of 1-bromoindolizines in high yields has been developed. This protocol is accomplished via a reaction sequence of 1,3-dipolar cycloaddition of the pyridinium ylide with maleic anhydride, oxidative decarboxylation of the primary cycloadduct, and dehydrogenative bromination of the resulting 1-unsubstituted indolizine. Copper chloride was used as a catalyst and oxygen as the terminal oxidant. This reaction represents the first example of transition-metal-catalyzed direct dehydrogenative bromination of indolizine at the C-1 position. Moreover, the obtained 1-bromoindolizines can be transformed to other 1-substituted indolizines such as 1-arylindolizines via a simple reaction process.
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Affiliation(s)
- Fuyao Wang
- Jiangsu Key Laboratory of Green Synthetic for Functional Materials and School of Chemistry and Chemical Engineering, Jiangsu Normal University , Xuzhou 221116, Jiangsu, P. R. China
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Krzeszewski M, Thorsted B, Brewer J, Gryko DT. Tetraaryl-, pentaaryl-, and hexaaryl-1,4-dihydropyrrolo[3,2-b]pyrroles: synthesis and optical properties. J Org Chem 2014; 79:3119-28. [PMID: 24655027 DOI: 10.1021/jo5002643] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Efficient conditions for the synthesis of tetra-, penta-, and hexasubstituted derivatives of 1,4-dihydropyrrolo[3,2-b]pyrrole were developed. The tetraaryl derivatives were obtained in a novel one-pot reaction among aromatic aldehydes, aromatic amines, and butane-2,3-dione. After a thorough examination of various reaction parameters (solvent, acid, temperature) p-toluenesulfonic acid was identified as the crucial catalyst. As a result, 1,4-dihydropyrrolo[3,2-b]pyrroles were obtained in the highest yields reported to date. The scope and limitation studies showed that this new method was particularly efficient for sterically hindered aldehydes (yields 45-49%). Pentaaryl- and hexaaryl-1,4-dihydropyrrolo[3,2-b]pyrroles were prepared from tetraaryl-1,4-dihydropyrrolo[3,2-b]pyrroles via direct arylation by employing both electron-poor and electron-rich aromatic and heteroaromatic haloarenes. Strategic placement of electron-withdrawing substituents at the 2-, 3-, 5-, and 6-positions produced an acceptor-donor-acceptor type fluorophore. The resulting multiply substituted heteropentalenes displayed intriguing optical properties. The relationship between the structure and photophysical properties for all compounds were directly compared and thoroughly elucidated. All synthesized products displayed strong blue fluorescence and exhibited moderate to large Stokes shifts (3000-7300 cm(-1)) as well as high quantum yields of fluorescence up to 88%. Two-photon absorption cross-section values measured in the near-IR region were surprisingly high (hundreds of GM), given the limited conjugation in these propeller-shaped dyes.
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Affiliation(s)
- Maciej Krzeszewski
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 00-224 Warsaw, Poland
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Smari I, Zhao L, Yuan K, Ammar HB, Doucet H. Reactivity of bromofluorenes in palladium-catalysed direct arylation of heteroaromatics. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00771a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The palladium-catalysed direct arylation using 2-bromofluorene or 2,7-dibromofluorene and heteroaromatics as the coupling partners proceeded using only 0.1–0.5 mol% catalyst.
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Affiliation(s)
- Imen Smari
- Laboratoire de Synthèse Asymétrique et catalyse homogène
- (UR 11ES56) Université de Monastir
- Faculté des Sciences de Monastir
- Avenue de l'environnement
- Monastir 5000, Tunisia
| | - Liqin Zhao
- Institut Sciences Chimiques de Rennes
- UMR 6226 CNRS-Université de Rennes “Organométalliques: Matériaux et Catalyse”
- Campus de Beaulieu
- 35042 Rennes, France
| | - Kedong Yuan
- Institut Sciences Chimiques de Rennes
- UMR 6226 CNRS-Université de Rennes “Organométalliques: Matériaux et Catalyse”
- Campus de Beaulieu
- 35042 Rennes, France
| | - Hamed Ben Ammar
- Laboratoire de Synthèse Asymétrique et catalyse homogène
- (UR 11ES56) Université de Monastir
- Faculté des Sciences de Monastir
- Avenue de l'environnement
- Monastir 5000, Tunisia
| | - Henri Doucet
- Institut Sciences Chimiques de Rennes
- UMR 6226 CNRS-Université de Rennes “Organométalliques: Matériaux et Catalyse”
- Campus de Beaulieu
- 35042 Rennes, France
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