51
|
Ahmed A, Singha R, Ray JK. Ligand-free copper powder-catalyzed and KOtBu-accelerated expeditious synthesis of substituted benzoxazoles. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.067] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
52
|
Roscales S, Csákÿ AG. Transition-Metal-Free Direct anti-Carboboration of Alkynes with Boronic Acids To Produce Alkenylheteroarenes. Org Lett 2015; 17:1605-8. [PMID: 25738233 DOI: 10.1021/acs.orglett.5b00517] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Silvia Roscales
- Instituto Pluridisciplinar,
Universidad Complutense de Madrid, Campus de Excelencia Internactional Moncloa, Paseo de Juan XXIII, 1, 28040 Madrid, Spain
| | - Aurelio G. Csákÿ
- Instituto Pluridisciplinar,
Universidad Complutense de Madrid, Campus de Excelencia Internactional Moncloa, Paseo de Juan XXIII, 1, 28040 Madrid, Spain
| |
Collapse
|
53
|
Sasmal S, Sen I, Hall RG, Pal S. Intermolecular coupling of 2-iodoanilides with benzoxazoles: synthesis of N-(2-Benzoxazol-2-ylphenyl)benzamides via C–H activation. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.150] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
54
|
Song XR, Qiu YF, Song B, Hao XH, Han YP, Gao P, Liu XY, Liang YM. BF3·Et2O-Promoted Cleavage of the Csp–Csp2 Bond of 2-Propynolphenols/Anilines: Route to C2-Alkenylated Benzoxazoles and Benzimidazoles. J Org Chem 2015; 80:2263-71. [DOI: 10.1021/jo502761x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Xian-Rong Song
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yi-Feng Qiu
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Bo Song
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xin-Hua Hao
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Ya-Ping Han
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Pin Gao
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Xue-Yuan Liu
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| | - Yong-Min Liang
- State Key Laboratory
of Applied Organic
Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
| |
Collapse
|
55
|
Sapegin AV, Kalinin SA, Smirnov AV, Dorogov MV, Krasavin M. Efficient Use of 1,2-Dihaloazine Synthons in Transition-Metal-Free Preparation of Diverse Heterocycle-Fused 1,4-Oxazepines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403397] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
56
|
Zhang G, Wang P, Yang F, Wu Y. Copper-catalyzed synthesis of 2-arylbenzoxazoles from o -aminophenol derivatives with arylmethyl chlorides. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.11.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
57
|
Maleki B, Baghayeri M, Vahdat SM, Mohammadzadeh A, Akhoondi S. Ag@TiO2 nanocomposite; synthesis, characterization and its application as a novel and recyclable catalyst for the one-pot synthesis of benzoxazole derivatives in aqueous media. RSC Adv 2015. [DOI: 10.1039/c5ra06618b] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A Ag@TiO2 nanocomposite/water as a novel catalytic system is used for the synthesis of benzoxazole derivatives. A shorter reaction time along with high product yield, catalyst stability and recyclability are the merits of this novel protocol.
Collapse
Affiliation(s)
- Behrooz Maleki
- Department of Chemistry
- Hakim Sabzevari University
- Sabzevar 96179-76487
- Iran
| | - Mehdi Baghayeri
- Department of Chemistry
- Hakim Sabzevari University
- Sabzevar 96179-76487
- Iran
| | | | | | | |
Collapse
|
58
|
Hajipour AR, Khorsandi Z, Mortazavi M, Farrokhpour H. Green, efficient and large-scale synthesis of benzimidazoles, benzoxazoles and benzothiazoles derivatives using ligand-free cobalt-nanoparticles: as potential anti-estrogen breast cancer agents, and study of their interactions with estrogen receptor by molecular docking. RSC Adv 2015. [DOI: 10.1039/c5ra22207a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A facile and high yielding method for the synthesis of 2-aryl benzoxazoles, benzimidazole and benzothiazoles is reported employing cobalt oxide nanoparticles.
Collapse
Affiliation(s)
- Abdol R. Hajipour
- Pharmaceutical Research Laboratory
- Department of Chemistry
- Isfahan University of Technology
- Isfahan 84156
- Islamic Republic of Iran
| | - Zahra Khorsandi
- Pharmaceutical Research Laboratory
- Department of Chemistry
- Isfahan University of Technology
- Isfahan 84156
- Islamic Republic of Iran
| | - Maryam Mortazavi
- Department of Chemistry
- Isfahan University of Technology
- Isfahan
- I. R. Iran
- Department of Chemistry
| | | |
Collapse
|
59
|
Sarode SA, Bhojane JM, Nagarkar JM. An efficient magnetic copper ferrite nanoparticle: for one pot synthesis of 2-substituted benzoxazole via redox reactions. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.065] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
60
|
Lee WC, Wang TH, Ong TG. Ligand promoted Pd-catalyzed dehydrogenative alkenylation of hetereoarenes. Chem Commun (Camb) 2014; 50:3671-3. [PMID: 24398602 DOI: 10.1039/c3cc48750d] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient Pd-catalyzed cross-dehydrogenative coupling of heteroarenes with styrenes and other olefinic substrates has been developed. This alkenylation paradigm encompasses a wide range of substrates and provides a straightforward approach toward C2-E-alkenylated azole motifs.
Collapse
Affiliation(s)
- Wei-Chih Lee
- Institute of Chemistry, Academia Sinica, Taipei, Taiwan, Republic of China.
| | | | | |
Collapse
|
61
|
Syntheses of 2-Aryl Benzothiazoles via Photocatalyzed Oxidative Condensation of Amines with 2-Aminothiophenol in the Presence of BODIPY Derivatives. SYNTHETIC COMMUN 2014. [DOI: 10.1080/00397911.2014.932811] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
62
|
Alla SK, Sadhu P, Punniyamurthy T. Organocatalytic Syntheses of Benzoxazoles and Benzothiazoles using Aryl Iodide and Oxone via C–H Functionalization and C–O/S Bond Formation. J Org Chem 2014; 79:7502-11. [DOI: 10.1021/jo501216h] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Santhosh Kumar Alla
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Pradeep Sadhu
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | | |
Collapse
|
63
|
Ernst JB, Tay NES, Jui NT, Buchwald SL. Regioselective synthesis of benzimidazolones via cascade C-N coupling of monosubstituted ureas. Org Lett 2014; 16:3844-6. [PMID: 24971635 PMCID: PMC4216194 DOI: 10.1021/ol501531q] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
![]()
A direct
method for the regioselective construction of benzimidazolones
is reported wherein a single palladium catalyst is employed to couple
monosubstituted urea substrates with differentially substituted 1,2-dihaloaromatic
systems. In this method, the catalyst is able to promote a cascade
of two discrete chemoselective C–N bond-forming processes that
allows the highly selective and predictable formation of complex heterocycles
from simple, readily available starting materials.
Collapse
Affiliation(s)
- Johannes B Ernst
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | | | | | | |
Collapse
|
64
|
Mayo MS, Yu X, Zhou X, Feng X, Yamamoto Y, Bao M. Synthesis of Benzoxazoles from 2-Aminophenols and β-Diketones Using a Combined Catalyst of Brønsted Acid and Copper Iodide. J Org Chem 2014; 79:6310-4. [DOI: 10.1021/jo500604x] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Muhammad Shareef Mayo
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiaoqiang Yu
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiaoyu Zhou
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Xiujuan Feng
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| | - Yoshinori Yamamoto
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
- WPI-AIMR (WPI-Advanced Institute for Materials Research), Tohoku University, Sendai 980-8577, Japan
| | - Ming Bao
- State
Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China
| |
Collapse
|
65
|
Demmer CS, Hansen JC, Kehler J, Bunch L. New Palladium-Catalyzed Domino Reaction with Intramolecular Ring Closure of anN-(2-Chloro-3-heteroaryl)arylamide: First Synthesis of Oxazolo[4,5-b]pyrazines. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300845] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
66
|
Sambiagio C, Marsden SP, Blacker AJ, McGowan PC. Copper catalysed Ullmann type chemistry: from mechanistic aspects to modern development. Chem Soc Rev 2014; 43:3525-50. [PMID: 24585151 DOI: 10.1039/c3cs60289c] [Citation(s) in RCA: 763] [Impact Index Per Article: 76.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Cu-catalysed arylation reactions devoted to the formation of C-C and C-heteroatom bonds (Ullmann-type couplings) have acquired great importance in the last decade. This review discusses the history and development of coupling reactions between aryl halides and various classes of nucleophiles, focusing mostly on the different mechanisms proposed through the years. Selected mechanistic investigations are treated more in depth than others. For example, evidence in favour or against radical mechanisms is discussed. Cu(I) and Cu(III) complexes involved in the Ullmann reaction and N/O selectivity in aminoalcohol arylation are discussed. A separate section has been dedicated to the synthesis of heterocyclic rings through intramolecular couplings. Finally, recent developments in green chemistry for these reactions, such as reactions in aqueous media and heterogeneous catalysis, have also been reviewed.
Collapse
Affiliation(s)
- Carlo Sambiagio
- iPRD, School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2-9JT, UK.
| | | | | | | |
Collapse
|
67
|
Kosurkar UB, Dadmal TL, Appalanaidu K, Khageswara Rao Y, Nanubolu JB, Kumbhare RM. Microwave assisted synthesis of 2-aminooxazolo [4,5-b] pyridine derivatives via intramolecular C–O bond formation in aqueous medium. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2013.12.090] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
68
|
Khatun N, Guin S, Rout SK, Patel BK. Divergent reactivities of o-haloanilides with CuO nanoparticles in water: a green synthesis of benzoxazoles and o-hydroxyanilides. RSC Adv 2014. [DOI: 10.1039/c3ra46820h] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
69
|
Wu F, Zhang J, Wei Q, Liu P, Xie J, Jiang H, Dai B. Copper-catalysed intramolecular O-arylation: a simple and efficient method for benzoxazole synthesis. Org Biomol Chem 2014; 12:9696-701. [DOI: 10.1039/c4ob02068e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An efficient protocol has been developed for the copper-catalysed intramolecular cyclization of N-(2-iodo-/bromo-/chloro-phenyl)benzamides for the synthesis of 2-substituted benzoxazoles.
Collapse
Affiliation(s)
- Fengtian Wu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003, China
| | - Jie Zhang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003, China
| | - Qianbing Wei
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003, China
| | - Ping Liu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003, China
| | - Jianwei Xie
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003, China
| | - Haojie Jiang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003, China
| | - Bin Dai
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003, China
| |
Collapse
|
70
|
|
71
|
Gu L, Wang W, Xiong Y, Huang X, Li G. Synthesis of 2-Arylbenzoxazoles through Oxidation of C-H Bonds Adjacent to Oxygen Atoms. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301504] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
72
|
An improved protocol for synthesis of N-arylamides and benzoxazoles by the copper-catalyzed reaction of aryl halides with nitriles. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.09.059] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
73
|
Qian W, Wang H, Allen J. Copper-Catalyzed Domino Cycloaddition/CN Coupling/Cyclization/(CH Arylation): An Efficient Three-Component Synthesis of Nitrogen Polyheterocycles. Angew Chem Int Ed Engl 2013; 52:10992-6. [DOI: 10.1002/anie.201305970] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Indexed: 11/09/2022]
|
74
|
Qian W, Wang H, Allen J. Copper-Catalyzed Domino Cycloaddition/CN Coupling/Cyclization/(CH Arylation): An Efficient Three-Component Synthesis of Nitrogen Polyheterocycles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305970] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
75
|
Wu XF, Neumann H, Neumann S, Beller M. Sequential one-pot synthesis of benzoxazoles from aryl bromides: successive palladium- and copper-catalyzed reactions. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.03.053] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
76
|
Park HJ, Park MS, Lee TH, Park KH. Synthesis of 2-Styrylbenzoxazole Derivatives by the Reaction of Styrylphenolic Schiff Bases with Thianthrene Cation Radical. J Heterocycl Chem 2013. [DOI: 10.1002/jhet.1707] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hee Jung Park
- Korea Basic Science Institute; Ochang; Chungbuk; 363-883; Korea
| | | | - Tae Hee Lee
- Department of Chemistry; Chungnam National University; Yuseong-gu; Daejeon; 305-764; Korea
| | - Koon Ha Park
- Department of Chemistry; Chungnam National University; Yuseong-gu; Daejeon; 305-764; Korea
| |
Collapse
|
77
|
Xiang SK, Zhang DX, Hu H, Shi JL, Liao LG, Feng C, Wang BQ, Zhao KQ, Hu P, Yang H, Yu WH. Synthesis ofN-Arylamides by Copper-Catalyzed Amination of Aryl Halides with Nitriles. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300189] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
78
|
Kim HS, Banwell MG, Willis AC. Convergent Total Syntheses of the Amaryllidaceae Alkaloids Lycoranine A, Lycoranine B, and 2-Methoxypratosine. J Org Chem 2013; 78:5103-9. [DOI: 10.1021/jo4006987] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hye Sun Kim
- Research School of Chemistry, Institute of Advanced
Studies, The Australian National University, Canberra ACT 0200, Australia
| | - Martin G. Banwell
- Research School of Chemistry, Institute of Advanced
Studies, The Australian National University, Canberra ACT 0200, Australia
| | - Anthony C. Willis
- Research School of Chemistry, Institute of Advanced
Studies, The Australian National University, Canberra ACT 0200, Australia
| |
Collapse
|
79
|
Assembly of N-Containing Heterocycles via Pd- and Cu-Catalyzed C–N Bond Formation Reactions. TOP ORGANOMETAL CHEM 2013. [DOI: 10.1007/3418_2013_61] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
|
80
|
Jadhav J, Gaikwad V, Kurane R, Salunkhe R, Rashinkar G. Intramolecular O-arylation route to 2-substituted benzoxazoles mediated by ferrocene tethered polymer supported ionic liquid phase catalyst. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.02.028] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
81
|
Shi L, Wang R, Yang H, Jiang Y, Fu H. Efficient copper-catalyzed domino synthesis of tetrazoloisoquinolines. RSC Adv 2013. [DOI: 10.1039/c3ra23230a] [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
|
82
|
Gu L, Jin C, Guo J, Zhang L, Wang W. A novel strategy for the construction of substituted benzoxazoles via a tandem oxidative process. Chem Commun (Camb) 2013; 49:10968-70. [DOI: 10.1039/c3cc46375c] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
83
|
Vaillard VA, Rossi RA, Argüello JE. Photochemical and photophysical behavior of indolyl anions in photostimulated intramolecular arylation reactions. Org Biomol Chem 2012; 10:9255-61. [PMID: 23089951 DOI: 10.1039/c2ob26698a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
O-Arylation reaction is obtained when N-(2-halophenyl) indolo carboxamides are irradiated in a basic medium. On the basis of photochemical and photophysical experiments, we propose that 2-indolylbenzoxazole is formed by intramolecular electron transfer followed by fast dehalogenation of the halophenyl radical anion pendant moiety, finally a radical-radical collapse renders the observed product.
Collapse
Affiliation(s)
- Victoria A Vaillard
- INFIQC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, 5000, Argentina
| | | | | |
Collapse
|
84
|
Aljaar N, Malakar CC, Conrad J, Frey W, Beifuss U. Reaction of 1-Nitroso-2-naphthols with α-Functionalized Ketones and Related Compounds: The Unexpected Formation of Decarbonylated 2-Substituted Naphtho[1,2-d][1,3]oxazoles. J Org Chem 2012. [DOI: 10.1021/jo3022956] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Nayyef Aljaar
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstraße 30, D-70599 Stuttgart,
Germany
| | - Chandi C. Malakar
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstraße 30, D-70599 Stuttgart,
Germany
| | - Jürgen Conrad
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstraße 30, D-70599 Stuttgart,
Germany
| | - Wolfgang Frey
- Institut für
Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Uwe Beifuss
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstraße 30, D-70599 Stuttgart,
Germany
| |
Collapse
|
85
|
Ball CJ, Willis MC. Cascade Palladium- and Copper-Catalysed Aromatic Heterocycle Synthesis: The Emergence of General Precursors. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201386] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
86
|
Sudheendran K, Malakar CC, Conrad J, Beifuss U. Copper(I)-Catalyzed Intramolecular O-Arylation for the Synthesis of 2,3,4,9-Tetrahydro-1H-xanthen-1-ones with Low Loads of CuCl. J Org Chem 2012; 77:10194-210. [DOI: 10.1021/jo3018318] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Kavitha Sudheendran
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstrasse 30, D-70599
Stuttgart, Germany
| | - Chandi C. Malakar
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstrasse 30, D-70599
Stuttgart, Germany
| | - Jürgen Conrad
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstrasse 30, D-70599
Stuttgart, Germany
| | - Uwe Beifuss
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim, Garbenstrasse 30, D-70599
Stuttgart, Germany
| |
Collapse
|
87
|
Zhang H, Jin Y, Liu H, Jiang Y, Fu H. Copper-Catalyzed Cascade Synthesis of 1H-Indolo[1,2-c]quinazoline Derivatives. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200953] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
88
|
Yu L, Wang M, Li P, Wang L. Fe3O4nanoparticle-supported copper(I): magnetically recoverable and reusable catalyst for the synthesis of quinazolinones and bicyclic pyrimidinones. Appl Organomet Chem 2012. [DOI: 10.1002/aoc.2902] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lin Yu
- Department of Chemistry; Huaibei Normal University; Anhui; 235000; People's Republic of China
| | - Min Wang
- Department of Chemistry; Huaibei Normal University; Anhui; 235000; People's Republic of China
| | - Pinhua Li
- Department of Chemistry; Huaibei Normal University; Anhui; 235000; People's Republic of China
| | | |
Collapse
|
89
|
Ji P, Atherton JH, Page MI. Copper(I)-Catalyzed Amination of Aryl Halides in Liquid Ammonia. J Org Chem 2012; 77:7471-8. [DOI: 10.1021/jo301204t] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Pengju Ji
- IPOS, The
Page Laboratories, Department of Chemical
and Biological Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, U.K
| | - John H. Atherton
- IPOS, The
Page Laboratories, Department of Chemical
and Biological Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, U.K
| | - Michael I. Page
- IPOS, The
Page Laboratories, Department of Chemical
and Biological Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, U.K
| |
Collapse
|
90
|
Pouliot MF, Angers L, Hamel JD, Paquin JF. Synthesis of 2-oxazolines and related N-containing heterocycles using [Et2NSF2]BF4 as a cyclodehydration agent. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.05.130] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
91
|
Haldón E, Álvarez E, Nicasio MC, Pérez PJ. Copper(I) complexes with trispyrazolylmethane ligands: synthesis, characterization, and catalytic activity in cross-coupling reactions. Inorg Chem 2012; 51:8298-306. [PMID: 22831915 DOI: 10.1021/ic300843a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Three novel Cu(I) complexes bearing tris(pyrazolyl)methane ligands, Tpm(x), have been prepared from reactions of equimolar amounts of CuI and the ligands Tpm, (HC(pz)(3)), Tpm*, (HC(3,5-Me(2)-pz)(3)), and Tpm(Ms), (HC(3-Ms-pz)(3)). X-ray diffraction studies have shown that the Tpm and Tpm(Ms) derivatives exhibit a 2:1 Cu:ligand ratio, whereas the Tpm* complex is a mononuclear species in nature. The latter has been employed as a precatalyst in the arylation of amides and aromatic thiols with good activity. The synthesis of a Tpm*Cu(I)-phthalimidate, a feasible intermediate in this catalytic process, has also been performed. Low temperature (1)H NMR studies in CDCl(3) have indicated that this complex exists in solution as a mixture of two, neutral and ionic forms. Conductivity measurements have reinforced this proposal, the ionic form predominating in a very polar solvent such as DMSO. The reaction of Tpm*Cu(I)-phthalimidate with iodobenzene afforded the expected C-N coupling product in 76% yield accounting for its role as an intermediate in this transformation.
Collapse
Affiliation(s)
- Estela Haldón
- Laboratorio de Catálisis Homogénea, Departamento de Química y Ciencias de los Materiales, Unidad Asociada al CSIC, Centro de Investigación en Química Sostenible (CIQSO), Campus de El Carmen s/n, Universidad de Huelva, 21007-Huelva, Spain
| | | | | | | |
Collapse
|
92
|
Kavala V, Janreddy D, Raihan MJ, Kuo CW, Ramesh C, Yao CF. One-Pot Tandem Synthesis of 2-Arylbenzoxazole Derivatives via Copper-Catalyzed CN and CO Bond Formation. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200164] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
93
|
Chao B, Lin S, Ma Q, Lu D, Hu Y. Copper(I)-Mediated Cascade Reactions: An Efficient Approach to the Synthesis of Functionalized Benzofuro[3,2-d]pyrimidines. Org Lett 2012; 14:2398-401. [DOI: 10.1021/ol300822a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Bo Chao
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China, and China University of Petroleum, Qingdao 266580, P. R. China
| | - Shijun Lin
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China, and China University of Petroleum, Qingdao 266580, P. R. China
| | - Qingdong Ma
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China, and China University of Petroleum, Qingdao 266580, P. R. China
| | - Dong Lu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China, and China University of Petroleum, Qingdao 266580, P. R. China
| | - Youhong Hu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai 201203, China, and China University of Petroleum, Qingdao 266580, P. R. China
| |
Collapse
|
94
|
Liubchak K, Nazarenko K, Tolmachev A. Synthesis of annulated benzimidazoles via amidine cyclization. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.02.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
95
|
Yang D, Wang Y, Yang H, Liu T, Fu H. Copper-Catalyzed Domino Synthesis of Benzimidazo[2,1-b]quin- azolin-12(6H)-ones Using Cyanamide as a Building Block. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100580] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
96
|
Vaillard VA, Guastavino JF, Budén ME, Bardagí JI, Barolo SM, Rossi RA. Synthesis of 6-Substituted 2-Pyrrolyl and Indolyl Benzoxazoles by Intramolecular O-Arylation in Photostimulated Reactions. J Org Chem 2012; 77:1507-19. [DOI: 10.1021/jo202386b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Victoria A. Vaillard
- INFIQC, Departamento de Química Orgánica,
Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba. Argentina
| | - Javier F. Guastavino
- INFIQC, Departamento de Química Orgánica,
Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba. Argentina
| | - María E. Budén
- INFIQC, Departamento de Química Orgánica,
Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba. Argentina
| | - Javier I. Bardagí
- INFIQC, Departamento de Química Orgánica,
Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba. Argentina
| | - Silvia M. Barolo
- INFIQC, Departamento de Química Orgánica,
Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba. Argentina
| | - Roberto A. Rossi
- INFIQC, Departamento de Química Orgánica,
Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA Córdoba. Argentina
| |
Collapse
|
97
|
Rauws TRM, Maes BUW. Transition metal-catalyzed N-arylations of amidines and guanidines. Chem Soc Rev 2012; 41:2463-97. [DOI: 10.1039/c1cs15236j] [Citation(s) in RCA: 153] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
98
|
Yang X, Jin Y, Liu H, Jiang Y, Fu H. Easy and efficient one-pot synthesis of pyrazolo[1,5-c]quinazolines under mild copper-catalyzed conditions. RSC Adv 2012. [DOI: 10.1039/c2ra21929h] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
99
|
Yang X, Luo Y, Jin Y, Liu H, Jiang Y, Fu H. Concise and efficient one-pot copper-catalyzed synthesis of H-pyrazolo[5,1-a]isoquinolines. RSC Adv 2012. [DOI: 10.1039/c2ra21305b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
100
|
|