701
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Wang SS, Zhu QW, Liu S, Yang Y, Wang ZT, Jiang B, Tu SJ. Three-component domino [3+2] heterocyclization leading to pyran-3-yl-substituted fused pyrroles. RESEARCH ON CHEMICAL INTERMEDIATES 2013. [DOI: 10.1007/s11164-013-1396-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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702
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Fustero S, Román R, Asensio A, Maestro MA, Aceña JL, Simón-Fuentes A. An Approach to 2,4-Substituted Pyrazolo[1,5-a]pyridines and Pyrazolo[1,5-a]azepines by Ring-Closing Metathesis. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300901] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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703
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Pandey G, Bhowmik S, Batra S. Synthesis of 3H-Pyrazolo[3,4-c]isoquinolines and Thieno[3,2-c]isoquinolines via Cascade Imination/Intramolecular Decarboxylative Coupling. Org Lett 2013; 15:5044-7. [DOI: 10.1021/ol4023722] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Garima Pandey
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India, and Academy of Scientific and Innovative Research, New Delhi, India
| | - Subhendu Bhowmik
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India, and Academy of Scientific and Innovative Research, New Delhi, India
| | - Sanjay Batra
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, BS-10/1, Sector 10, Jankipuram extension, Sitapur Road, P.O. Box 173, Lucknow 226031, India, and Academy of Scientific and Innovative Research, New Delhi, India
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704
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Synthesis of bis-heterocyclic compounds with a phenylene bridge from 1,4- and 1,3-bis(2-chloro-2-cyanovinyl)benzenes. Chem Heterocycl Compd (N Y) 2013. [DOI: 10.1007/s10593-013-1325-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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705
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Reaction between ferrocene-carboxaldehyde and dioxaphospholene: Characterization and crystal structures of an unexpected bisferrocenyldioxolane. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.04.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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706
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Ferreira JP, Silva VL, Elguero J, Silva AM. Synthesis of new pyrazole-1,2,3-triazole dyads. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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707
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Zhu Y, Lu WT, Sun HC, Zhan ZP. Lewis Base Catalyzed Synthesis of Multisubstituted 4-Sulfonyl-1H-Pyrazole Involving a Novel 1,3-Sulfonyl Shift. Org Lett 2013; 15:4146-9. [DOI: 10.1021/ol401818m] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yu Zhu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Wen-Ting Lu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Hong-Chao Sun
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Zhuang-Ping Zhan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
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708
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Quiroga J, Gálvez J, Cobo J, Glidewell C. Two methyl 3-(1H-pyrazol-4-yl)octahydropyrrolo[3,4-c]pyrrole-1-carboxylates form different hydrogen-bonded sheets. Acta Crystallogr C 2013; 69:915-9. [PMID: 23907889 DOI: 10.1107/s0108270113017563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Accepted: 06/26/2013] [Indexed: 05/27/2023] Open
Abstract
In the molecules of both methyl (1RS,3SR,3aRS,6aSR)-1-methyl-3-(3-methyl-1-phenyl-1H-pyrazol-4-yl)-4,6-dioxo-5-phenyloctahydropyrrolo[3,4-c]pyrrole-1-carboxylate, C₂₅H₂₄N₄O₄, (I), and methyl (1RS,3SR,3aRS,6aSR)-5-(4-chlorophenyl)-1-methyl-3-(3-methyl-1-phenyl-1H-pyrazol-4-yl)-4,6-dioxooctahydropyrrolo[3,4-c]pyrrole-1-carboxylate, C₂₅H₂₃ClN₄O₄, (II), the two rings of the pyrrolopyrrole fragment are both nonplanar, with conformations close to half-chair forms. The overall conformations of the molecules of (I) and (II) are very similar, apart from the orientation of the ester function. The molecules of (I) are linked into sheets by a combination of an N-H∙∙∙π(pyrrole) hydrogen bond and three independent C-H∙∙∙O hydrogen bonds. The molecules of (II) are also linked into sheets, which are generated by a combination of an N-H∙∙∙N hydrogen bond and two independent C-H∙∙∙O hydrogen bonds, weakly augmented by a C-H∙∙∙π(arene) hydrogen bond.
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Affiliation(s)
- Jairo Quiroga
- Grupo de Investigación de Compuestos Heterocíclicos, Departamento de Química, Universidad de Valle, AA 25360 Cali, Colombia
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709
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Eberhart A, Cicoira C, Procter DJ. Nucleophilic ortho-allylation of pyrroles and pyrazoles: an accelerated Pummerer/thio-Claisen rearrangement sequence. Org Lett 2013; 15:3994-7. [PMID: 23855635 PMCID: PMC3819180 DOI: 10.1021/ol401786d] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Indexed: 01/18/2023]
Abstract
Arylsulfinyl groups direct the metal-free, regiospecific, nucleophilic ortho-allylation of pyrroles and pyrazoles. Mechanistic studies support the intermediacy of allylsulfonium salts that undergo facile thio-Claisen rearrangement onto the heterocyclic ring, giving products of coupling. The strategy has been adapted to allow regiospecific propargylation of the heterocyclic substrates.
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Affiliation(s)
- Andrew
J. Eberhart
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - Claudio Cicoira
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
| | - David J. Procter
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K
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710
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Synthesis of novel pyrazoles incorporating a phenothiazine moiety: unambiguous structural characterization of the regioselectivity in the 1,3-dipolar cycloaddition reaction using 2D HMBC NMR spectroscopy. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.06.028] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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711
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Li Y, Chang M, Liu R, Lin G, Gao W. A facile synthesis of (E)-3-styryl-1-phenyl cyclohepta[c]pyrazol-8(1H)-ones. RESEARCH ON CHEMICAL INTERMEDIATES 2013. [DOI: 10.1007/s11164-012-0785-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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712
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Kumar JA, Saidachary G, Mallesham G, Sridhar B, Jain N, Kalivendi SV, Rao VJ, Raju BC. Synthesis, anticancer activity and photophysical properties of novel substituted 2-oxo-2H-chromenylpyrazolecarboxylates. Eur J Med Chem 2013; 65:389-402. [DOI: 10.1016/j.ejmech.2013.03.042] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 03/18/2013] [Accepted: 03/22/2013] [Indexed: 10/26/2022]
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713
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Tong G, Xu H, Fan W, Jiang B, Wang S, Tu S. A Highly Diastereoselective Three-component Domino Reaction in Water Yielding Poly-substituted 4,5-Dihydropyrroles. CHINESE J CHEM 2013. [DOI: 10.1002/cjoc.201300249] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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714
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Thirunavukkarasu VS, Raghuvanshi K, Ackermann L. Expedient C–H Amidations of Heteroaryl Arenes Catalyzed by Versatile Ruthenium(II) Catalysts. Org Lett 2013; 15:3286-9. [DOI: 10.1021/ol401321q] [Citation(s) in RCA: 158] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Keshav Raghuvanshi
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammannstr. 2, 37077 Göttingen, Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammannstr. 2, 37077 Göttingen, Germany
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715
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Rudyakova EV, Samultsev DO, Levanova EP, Levkovskaya GG. Synthesis of previously unknown 3,3′-linearly linked sulfur- and selenium-containing bispyrazoles by reactions of 3-alkenyl-5-chloropyrazoles with bischalcogenols. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2013. [DOI: 10.1134/s1070428013050175] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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716
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Pérez-Aguilar MC, Valdés C. Regioselective One-Step Synthesis of Pyrazoles from Alkynes and N-Tosylhydrazones: [3+2] Dipolar Cycloaddition/[1,5] Sigmatropic Rearrangement Cascade. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301284] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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717
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Pérez-Aguilar MC, Valdés C. Regioselective one-step synthesis of pyrazoles from alkynes and N-tosylhydrazones: [3+2] dipolar cycloaddition/[1,5] sigmatropic rearrangement cascade. Angew Chem Int Ed Engl 2013; 52:7219-23. [PMID: 23740890 DOI: 10.1002/anie.201301284] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 03/22/2013] [Indexed: 11/09/2022]
Affiliation(s)
- M Carmen Pérez-Aguilar
- Instituto Universitario de Química Organometálica Enrique Moles, Universidad de Oviedo, c/Julián Clavería 8, Oviedo, 33006, Spain
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718
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Synthesis of pyrazole-fused polycyclic systems via intramolecular 1,3-dipolar cycloaddition reactions. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.099] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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719
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Arı H, Büyükmumcu Z, Özpozan T, İlhan İÖ, Bahadır Ö. Vibrational and theoretical analysis of pentyl-4-benzoyl-1-[2,4-dinitrophenyl]-5-phenyl-1H-pyrazole-3-carboxylate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 110:193-204. [PMID: 23563638 DOI: 10.1016/j.saa.2013.03.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 12/14/2012] [Accepted: 03/03/2013] [Indexed: 06/02/2023]
Abstract
Infrared spectrum of the compound, pentyl-4-benzoyl-1-[2,4-dinitrophenyl]-5-phenyl-1H-pyrazole-3-carboxylate (PBDPPC) has been measured. Conformational search through relaxed scan has been carried out to find the most stable conformational isomer. After the full geometry optimization for the most stable conformer using B3LYP and BLYP hybrid functionals of Density Functional Theory (DFT), vibrational normal modes have been calculated at the same theoretical levels. Potential Energy Distribution (PED) of each normal mode has been calculated by means of VEDA4 to obtain contributions of internal coordinates to the normal modes. Natural Bond Orbital (NBO) analysis has been performed to get insights into the possible hydrogen bonding sites for all the conformational isomers.
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Affiliation(s)
- Hatice Arı
- Bozok University, Faculty of Arts and Sciences, Department of Chemistry, Yozgat, Turkey
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720
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Shi QQ, Fu LP, Shi Y, Ding HQ, Luo JH, Jiang B, Tu SJ. Three-component synthesis of poly-substituted tetrahydroindoles through p-TsOH promoted alkoxylation. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.04.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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721
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Li Y, Xu H, Fu L, Shi Q, Jiang B, Tu S. Multicomponent Domino [4+1+1] Carbocyclization Providing an Efficient and Regioselective Strategy to Fluoren-9-ones. CHINESE J CHEM 2013. [DOI: 10.1002/cjoc.201201218] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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722
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Wang H, Zhao YL, Li L, Zhang ZW, Liu Q. Bicyclization of Diazomethanes: A Synthetic Strategy for Fused Pyrazoles. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201201062] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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723
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A simple new hydrazine-free synthesis of methyl 1,4,5-trisubstituted 1H-pyrazole-3-carboxylates. MONATSHEFTE FUR CHEMIE 2013. [DOI: 10.1007/s00706-013-0962-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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724
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Kumar SV, Yadav SK, Raghava B, Saraiah B, Ila H, Rangappa KS, Hazra A. Cyclocondensation of arylhydrazines with 1,3-bis(het)arylmonothio-1,3-diketones and 1,3-bis(het)aryl-3-(methylthio)-2-propenones: synthesis of 1-aryl-3,5-bis(het)arylpyrazoles with complementary regioselectivity. J Org Chem 2013; 78:4960-73. [PMID: 23607788 DOI: 10.1021/jo400599e] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Two efficient highly regioselective routes for the synthesis of unsymmetrically substituted 1-aryl-3,5-bis(het)arylpyrazoles with complementary regioselectivity starting from active methylene ketones have been reported. In the first protocol, the newly synthesized 1,3-bis(het)aryl-monothio-1,3-diketone precursors (prepared by condensation of active methylene ketones with het(aryl) dithioesters in the presence of sodium hydride) were reacted with arylhydrazines in refluxing ethanol under neutral conditions, furnishing 1-aryl-3,5-bis(het)arylpyrazoles 7, in which the het(aryl) moiety attached to the thiocarbonyl group of monothio-1,3-diketones is installed at the 3-position. In the second method, the corresponding 3-(methylthio)-1,3-bis(het)aryl-2-propenones (prepared in situ by base-induced alkylation of 1,3-monothiodiketones) were condensed with arylhydrazines in the presence of potassium tert-butoxide in refluxing tert-butyl alcohol, yielding 1-aryl-3,5-bis(het)arylpyrazoles 9 with complementary regioselectivity (method A). The efficiency of this protocol was further improved by developing a one-pot, three-component procedure for the synthesis of pyrazoles 9, directly from active methylene ketones, by reacting in situ generated 3-(methylthio)-1,3-bis(het)aryl-2-propenones with arylhydrazines in the presence of sodium hydride (instead of potassium tert-butoxide as base). The structures and regiochemistry of newly synthesized pyrazoles were confirmed from their spectral and analytical data along with X-ray crystallographic data of three pairs of regioisomers.
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Affiliation(s)
- S Vijay Kumar
- New Chemistry unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560064, India
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725
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Li F, Nie J, Sun L, Zheng Y, Ma JA. Silver-Mediated Cycloaddition of Alkynes with CF3CHN2: Highly Regioselective Synthesis of 3-Trifluoromethylpyrazoles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301870] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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726
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Li F, Nie J, Sun L, Zheng Y, Ma JA. Silver-mediated cycloaddition of alkynes with CF3CHN2: highly regioselective synthesis of 3-trifluoromethylpyrazoles. Angew Chem Int Ed Engl 2013; 52:6255-8. [PMID: 23616303 DOI: 10.1002/anie.201301870] [Citation(s) in RCA: 151] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Feng Li
- Department of Chemistry, Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Tianjin University, Tianjin 300072, China
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727
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Fan W, Ye Q, Xu HW, Jiang B, Wang SL, Tu SJ. Novel double [3 + 2 + 1] heteroannulation for forming unprecedented dipyrazolo-fused 2,6-naphthyridines. Org Lett 2013; 15:2258-61. [PMID: 23597067 DOI: 10.1021/ol4008266] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel four-component strategy for the efficient synthesis of unprecedented dipyrazolo-fused 2,6-naphthyridines through a double [3 + 2+1] heteroannulation has been described. The bond-forming efficiency, accessibility, and generality of this synthesis make it highly valuable to assemble tetra-heterocyclic scaffolds.
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Affiliation(s)
- Wei Fan
- School of Chemistry and Chemical Engineering, and Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116 Jiangsu, PR China
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728
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Foster RS, Adams H, Jakobi H, Harrity JPA. Synthesis of 4-Fluoromethylsydnones and their Participation in Alkyne Cycloaddition Reactions. J Org Chem 2013; 78:4049-64. [DOI: 10.1021/jo400381a] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert S. Foster
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Harry Adams
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, U.K
| | - Harald Jakobi
- Research-Weed Control Chemistry, Bayer CropScience, AG 65926 Frankfurt am Main, Germany
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729
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Li Y, Li QY, Xu HW, Fan W, Jiang B, Wang SL, Tu SJ. Multicomponent formation of fused pyrroles through p-TsOH promoted N-arylation. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.02.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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730
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Li N, Tu MS, Jiang B, Wang X, Tu SJ. Domino [3+2+1] heterocyclization of isothiocyanates with aryl amidines leading to polysubstituted 1,3,5-triazine derivatives. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.01.086] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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731
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Hao L, Hong JJ, Zhu J, Zhan ZP. One-Pot Synthesis of Pyrazoles through a Four-Step Cascade Sequence. Chemistry 2013; 19:5715-20. [DOI: 10.1002/chem.201204322] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 01/18/2013] [Indexed: 11/09/2022]
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732
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DeAngelis A, Wang DH, Buchwald SL. Mild and Rapid Pd-Catalyzed Cross-Coupling with Hydrazine in Continuous Flow: Application to the Synthesis of Functionalized Heterocycles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208544] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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733
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DeAngelis A, Wang DH, Buchwald SL. Mild and Rapid Pd-Catalyzed Cross-Coupling with Hydrazine in Continuous Flow: Application to the Synthesis of Functionalized Heterocycles. Angew Chem Int Ed Engl 2013; 52:3434-7. [DOI: 10.1002/anie.201208544] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Indexed: 11/11/2022]
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734
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Fu LP, Shi QQ, Shi Y, Jiang B, Tu SJ. Three-component domino reactions for regioselective formation of bis-indole derivatives. ACS COMBINATORIAL SCIENCE 2013; 15:135-40. [PMID: 23339825 DOI: 10.1021/co3001428] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A microwave-assisted regioselective reaction dealing with arylglyoxal monohydrate, diverse N-aryl enaminones, and indoles to achieve 3,2'- and 3,3'-bis-indoles by varying a substituted indole substrate is reported. The 2-unsubstituted indoles resulted in the 3,2'-bis-indole skeleton, whereas indoles bearing a methyl or phenyl group at C2 led to the 3,3'-bis-indoles with simultaneous formation of three sigma-bonds. The procedures feature excellent regioselectivity, short reaction times, convenient one-pot manner, and operational simplicity.
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Affiliation(s)
- Li-Ping Fu
- School of Chemistry and Chemical Engineering, Key Laboratory
of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P.R. China
| | - Qing-Qing Shi
- School of Chemistry and Chemical Engineering, Key Laboratory
of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P.R. China
| | - Yu Shi
- School of Chemistry and Chemical Engineering, Key Laboratory
of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P.R. China
| | - Bo Jiang
- School of Chemistry and Chemical Engineering, Key Laboratory
of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P.R. China
| | - Shu-Jiang Tu
- School of Chemistry and Chemical Engineering, Key Laboratory
of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou, 221116, P.R. China
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735
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736
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Saleh TS, Narasimharao K, Ahmed NS, Basahel SN, Al-Thabaiti SA, Mokhtar M. Mg–Al hydrotalcite as an efficient catalyst for microwave assisted regioselective 1,3-dipolar cycloaddition of nitrilimines with the enaminone derivatives: A green protocol. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcata.2012.11.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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737
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A facile access to 1,3,4-trisubstituted pyrazoles via 1,3-dipolar cycloaddition of 3-arylsydnones with α,β-unsaturated ketones. MONATSHEFTE FUR CHEMIE 2013. [DOI: 10.1007/s00706-012-0901-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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738
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Eftekhari-Sis B, Zirak M, Akbari A. Arylglyoxals in Synthesis of Heterocyclic Compounds. Chem Rev 2013; 113:2958-3043. [DOI: 10.1021/cr300176g] [Citation(s) in RCA: 228] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Bagher Eftekhari-Sis
- Department of Chemistry, Faculty
of Science, University of Maragheh, Golshahr,
P.O. Box. 55181-83111, Maragheh, Iran
| | - Maryam Zirak
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran,
Iran
| | - Ali Akbari
- Department of Chemistry, Faculty
of Science, University of Maragheh, Golshahr,
P.O. Box. 55181-83111, Maragheh, Iran
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739
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Zhang T, Bao W. Synthesis of 1H-Indazoles and 1H-Pyrazoles via FeBr3/O2 Mediated Intramolecular C–H Amination. J Org Chem 2013; 78:1317-22. [DOI: 10.1021/jo3026862] [Citation(s) in RCA: 123] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Tianshui Zhang
- Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, P. R. China
| | - Weiliang Bao
- Department of Chemistry, Xixi Campus, Zhejiang University, Hangzhou 310028, P. R. China
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740
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Xu SX, Hao L, Wang T, Ding ZC, Zhan ZP. Chemoselective synthesis of substituted pyrazoles through AgOTf-catalyzed cascade propargylic substitution-cyclization-aromatization. Org Biomol Chem 2013. [PMID: 23188378 DOI: 10.1039/c2ob27016a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A cascade AgOTf-catalyzed chemoselective approach to 3,5/1,3-disubstitued pyrazoles from propargylic alcohols and para-tolylsulfonohydrazide has been developed. Good chemoselectivity is observed depending on the different substituents in the alkyne moiety of the propargylic alcohols, generating two different kinds of products through different aromatization mechanisms. The pyrazolo[5,1-a]isoquinoline skeleton can also be effectively constructed by this method through a cascade bicyclization process.
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Affiliation(s)
- Su-Xia Xu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
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741
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Simon RC, Zepeck F, Kroutil W. Chemoenzymatic Synthesis of All Four Diastereomers of 2,6-Disubstituted Piperidines through Stereoselective Monoamination of 1,5-Diketones. Chemistry 2013; 19:2859-65. [DOI: 10.1002/chem.201202793] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 11/05/2012] [Indexed: 11/12/2022]
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742
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Ilangovan A, Venkatesan P, Ganesh Kumar R. Hydrogen bonding due to regioisomerism and its effect on the supramolecular architecture of diethyl 2-[(2/4-hydroxyanilino)methylidene]malonates. Acta Crystallogr C 2013; 69:70-3. [PMID: 23282918 DOI: 10.1107/s0108270112047257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 11/16/2012] [Indexed: 11/10/2022] Open
Abstract
Diethyl 2-[(2-hydroxyanilino)methylidene]malonate, (I), and diethyl 2-[(4-hydroxyanilino)methylidene]malonate, (II), both C(14)H(17)NO(5), crystallize in centrosymmetric orthorhombic and monoclinic crystal systems, respectively. Compound (I) resides on a crystallographic mirror plane and displays bifurcated intramolecular hydrogen bonding, as well as intermolecular hydrogen bonding due to the position of the hydroxy group. Compound (II) has a single intramolecular N-H...O hydrogen bond. Infinite one-dimensional head-to-tail chains formed by O-H...O hydrogen bonding are present in both structures. The molecular packing is mainly influenced by the intermolecular O-H...O interactions. Additionally, C-H...O interactions crosslinking the chains are found in (II).
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Affiliation(s)
- Andivelu Ilangovan
- School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India.
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743
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Ermolenko MS, Guillou S, Janin YL. Pyrazole-3/5-carboxylic acids from 3/5-trifluoromethyl NH-pyrazoles. Tetrahedron 2013. [DOI: 10.1016/j.tet.2012.10.034] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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744
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Tang M, Zhang W, Kong Y. DABCO-promoted synthesis of pyrazoles from tosylhydrazones and nitroalkenes. Org Biomol Chem 2013; 11:6250-4. [DOI: 10.1039/c3ob41435c] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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745
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Rao VK, Tiwari R, Chhikara BS, Shirazi AN, Parang K, Kumar A. Copper triflate-mediated synthesis of 1,3,5-triarylpyrazoles in [bmim][PF 6] ionic liquid and evaluation of their anticancer activities. RSC Adv 2013; 3:15396-15403. [PMID: 24163734 DOI: 10.1039/c3ra41830h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple, efficient, and environment friendly protocol for the synthesis of 1,3,5-triarylpyrazole and 1,3,5-triarylpyrazolines in [bimm][PF6] ionic liquid mediated by Cu(OTf)2 is described. The reaction protocol gave 1,3,5-triarylpyrazoles in good to high yields (71-84%) via a one-pot addition-cyclocondensation between chalcones and arylhydrazines, and oxidative aromatization without requirement for an additional oxidizing reagent. The catalyst can be reused up to four cycles without much loss in the catalytic activity. The pyrazoles (4a-o) and pyrazolines (3a-n) were evaluated for antiproliferative activity in SK-OV-3, HT-29, and HeLa human cancer cells lines. Among all compounds, 3b inhibited cell proliferation of HeLa cells by 80% at a concentration of 50 μM.
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Affiliation(s)
- V Kameshwara Rao
- Department of Chemistry, Birla Institute of Technology and Science, Pilani 333031, Rajasthan, India
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746
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Li Y, Fan W, Xu HW, Jiang B, Wang SL, Tu SJ. A novel three-component [5 + 1] heterocyclization leading to 2-azafluorenone synthesis and its polyfunctionalizations. Org Biomol Chem 2013; 11:2417-20. [DOI: 10.1039/c3ob40371h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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747
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Xu HW, Fan W, Li MY, Jiang B, Wang SL, Tu SJ. A novel domino strategy for forming poly-substituted quaternary imidazoles through a Cs2CO3-promoted aryl migration process. Org Biomol Chem 2013; 11:3603-7. [DOI: 10.1039/c3ob40666k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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748
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Saquib M, Husain I, Kant R, Meena S, Gauniyal HM, Sinha S, Maulik PR, Shaw AK. Regioselective synthesis of densely functionalized, enantiopure, sugar–pyrazole hybrids as potential scaffolds for drug discovery. RSC Adv 2013. [DOI: 10.1039/c3ra22287j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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749
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Wang WL, Feng YL, Gao WQ, Luo X, Deng WP. A highly efficient BF3·Et2O-catalysed intramolecular [3+2] cycloaddition for the synthesis of 3,4-dihydrobenzopyrano[3,4-c]pyrazoles. RSC Adv 2013. [DOI: 10.1039/c2ra22025c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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750
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Liao JY, Selvaraju M, Chen CH, Sun CM. Multistep divergent synthesis of benzimidazole linked benzoxazole/benzothiazole via copper catalyzed domino annulation. Org Biomol Chem 2013; 11:2473-81. [DOI: 10.1039/c3ob27177c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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