1
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Zhang XX, Wang PK, Zhang SL. Synthesis of ɑ-Aryl-oxindoles via Grignard Reaction with Isatin in the Presence of Diphenyl Phosphite. Chem Asian J 2024; 19:e202400297. [PMID: 38700937 DOI: 10.1002/asia.202400297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 05/03/2024] [Indexed: 06/10/2024]
Abstract
A protocol has been developed for the synthesis of α-aryl-oxindoles from isatin and Grignard reagents in the presence of diphenyl phosphite for the first time. This reaction was conveniently carried out under mild conditions in a one-pot fashion with moderate to excellent yields.
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Affiliation(s)
- Xinxin X Zhang
- Oxford Suzhou Centre for Advanced Research Building A, 388 Ruo Shui Road, Suzhou Industrial Park, Jiangsu, 215123, P. R. China
| | - Pengkai K Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou, 215123, People's Republic of China
| | - Songlin L Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou, 215123, People's Republic of China
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2
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Shigehiro Y, Miya K, Shibai R, Kataoka Y, Ura Y. Synthesis of Pd-NNP Phosphoryl Mononuclear and Phosphinous Acid-Phosphoryl-Bridged Dinuclear Complexes and Ambient Light-Promoted Oxygenation of Benzyl Ligands. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuma Shigehiro
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
| | - Karen Miya
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
| | - Risa Shibai
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
| | - Yasutaka Kataoka
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
| | - Yasuyuki Ura
- Department of Chemistry, Biology, and Environmental Science, Faculty of Science, Nara Women’s University, Kitauoyanishi-machi, Nara 630-8506, Japan
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3
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Shen H, Du Y, Kan J, Su W. Synthesis of 3-substituted 2-oxindoles from secondary α-bromo-propionanilides via palladium-catalyzed intramolecular cyclization. Org Biomol Chem 2022; 20:3589-3597. [PMID: 35420109 DOI: 10.1039/d2ob00480a] [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
In contrast to aromatic halides, coupling reactions involving oxidative addition of alkyl halides, especially secondary or tertiary halides, to transition metals tend to be more challenging. Herein a palladium-catalyzed intramolecular cyclization of α-bromo-propionanilides has been developed, delivering a series of 3-substituted 2-oxindoles in high yields. The method features easy to prepare starting materials, broad substrate scope and excellent functional group tolerance. A detailed mechanistic investigation has been performed.
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Affiliation(s)
- Hui Shen
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China. .,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China
| | - Yu Du
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China. .,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China
| | - Jian Kan
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China. .,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China
| | - Weiping Su
- College of Chemistry & Materials Science, Fujian Normal University, Fuzhou 350007, P. R. China. .,State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou 350002, P. R. China.,Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China
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4
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Salameh N, Anastasiou I, Ferlin F, Minio F, Chen S, Santoro S, Liu P, Gu Y, Vaccaro L. Heterogeneous palladium-catalysed intramolecular C(sp3) H α-arylation for the green synthesis of oxindoles. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Xiao HX, Hsu WY, Liang SW, Guo Y, Lee WC, Lu IC, Chang YC. Bulky Di(1-adamantyl)phosphinous Acid-Ligated Pd(II) Precatalysts for Suzuki Reactions of Unreactive Aryl Chlorides. ACS OMEGA 2021; 6:35134-35143. [PMID: 34963994 PMCID: PMC8697604 DOI: 10.1021/acsomega.1c06430] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 11/25/2021] [Indexed: 06/14/2023]
Abstract
Di(1-adamantyl)phosphine oxide (SPO-Ad: Ad2P(V)(=O)H), a stable tautomer of di(1-adamantyl)phosphinous acid (PA-Ad: Ad2P(III)-OH), was employed to synthesize two new PA-Ad-coordinated complexes, POPd-Ad and POPd2-Ad. POPd-Ad was easily transformed from POPd2-Ad in acetonitrile, and the [M - H]- ion of the deprotonated POPd-Ad was observed in the electrospray ionization-mass spectrum of POPd2-Ad. Both complexes are effective precatalysts for the Suzuki reaction of aryl chlorides. The reduction of Pd(II) in POPd-Ad and POPd2-Ad by arylboronic acid was examined, and the ideal Pd-to-PA ratio in the Suzuki reaction was found to be 1:1. The effect of temperature on the catalytic yields was studied to examine the possible ligation state of the active species and the dimer-to-monomer process of POPd2-Ad. Mononuclear and mono-ligated Pd species was assumed to be catalytically active. The electronic and steric effects of PA-Ad were slightly better than those reported for PA-tBu ( t Bu2P(III)-OH). Density functional theory calculations were performed to evaluate the formation of mono-ligated and mononuclear Pd species from POPd-Ad and POPd2-Ad. Furthermore, the reaction time and catalyst loading could be reduced for the reported POPd1-tBu precatalyst using the optimized reaction conditions for POPd-Ad. The complexes synthesized in this extensive study will complement the existing SPO-coordinated POPd series of precatalysts.
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Affiliation(s)
- He-Xin Xiao
- Department
of Applied Chemistry, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu
Dist., Taichung City 43301, Taiwan
| | - Wan-Yun Hsu
- Department
of Applied Chemistry, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu
Dist., Taichung City 43301, Taiwan
| | - Siou-Wei Liang
- Department
of Applied Chemistry, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu
Dist., Taichung City 43301, Taiwan
| | - Yingjie Guo
- Department
of Cosmetic Science, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu
Dist., Taichung City 43301, Taiwan
| | - Wan-Ching Lee
- Department
of Chemistry, National Chung Hsing University, 145 Xingda Rd., South Dist., Taichung City40227, Taiwan
| | - I-Chung Lu
- Department
of Chemistry, National Chung Hsing University, 145 Xingda Rd., South Dist., Taichung City40227, Taiwan
| | - Yu-Chang Chang
- Department
of Applied Chemistry, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu
Dist., Taichung City 43301, Taiwan
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6
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Ostrowska S, Scattolin T, Nolan SP. N-Heterocyclic carbene complexes enabling the α-arylation of carbonyl compounds. Chem Commun (Camb) 2021; 57:4354-4375. [PMID: 33949497 DOI: 10.1039/d1cc00913c] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The considerable importance of α-arylated carbonyl compounds, which are widely used as final products or as key intermediates in the pharmaceutical industry, has prompted numerous research groups to develop efficient synthetic strategies for their preparation in recent decades. In this context, the α-arylation of carbonyl compounds catalyzed by transition-metal complexes have been particularly helpful in constructing this motif. As illustrated in this contribution, tremendous advances have taken place using palladium- and nickel-NHC (NHC = N-heterocyclic carbene) complexes as pre-catalysts for the arylation of a wide range of ketones, aldehydes, esters and amides with electron-rich, electron-neutral, electron-poor, and sterically hindered aryl halides or pseudo-halides. Despite significant progress, especially in asymmetric α-arylations promoted by chiral NHC ligands, there are numerous challenges which have and continue to encourage further studies on this topic. Some of these are presented in this report.
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Affiliation(s)
- Sylwia Ostrowska
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Thomas Scattolin
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000, Ghent, Belgium.
| | - Steven P Nolan
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000, Ghent, Belgium.
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7
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Focusing on the Catal. of the Pd- and Ni-Catalyzed Hirao Reactions. Molecules 2020; 25:molecules25173897. [PMID: 32859095 PMCID: PMC7503744 DOI: 10.3390/molecules25173897] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/24/2020] [Accepted: 08/25/2020] [Indexed: 12/17/2022] Open
Abstract
The Hirao reaction involving the phosphinoylation or phosphonation of aryl halides by >P(O)H reagents is a P–C bond forming transformation belonging to the recently very hot topic of cross-couplings. The Pd- or Ni-catalyzed variations take place via the usual cycle including oxidative addition, ligand exchange, and reductive elimination. However, according to the literature, the nature of the transition metal catalysts is not unambiguous. In this feature article, the catalysts described for the Pd(OAc)2-promoted cases are summarized, and it is concluded that the “(HOY2P)2Pd(0)” species (Y = aryl, alkoxy) is the real catalyst. In our model, the excess of the >P(O)H reagent served as the P-ligand. During the less studied Ni(II)-catalyzed instances the “(HOY2P)(−OY2P)Ni(II)Cl−” form was found to enter the catalytic cycle. The newest conclusions involving the exact structure of the catalysts, and the mechanism for their formation explored by us were supported by our earlier experimental data and theoretical calculations.
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8
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Shukla D, Babu SA. Pd‐Catalyzed Diastereoselective Intramolecular Amide
α
‐C−H Arylation in Sterically Hindered Monospirooxindole Motifs. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801732] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Dipti Shukla
- Department Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O. Punjab 140306 India
| | - Srinivasarao Arulananda Babu
- Department Chemical SciencesIndian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali, Manauli P.O. Punjab 140306 India
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9
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Weber P, Scherpf T, Rodstein I, Lichte D, Scharf LT, Gooßen LJ, Gessner VH. Ein hochaktives, Ylid‐funktionalisiertes Phosphan für die palladiumkatalysierte Aminierung von Arylchloriden. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201810696] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Philip Weber
- Evonik Lehrstuhl für Organische ChemieRuhr Universität Bochum, ZEMOS Universitätsstraße 150 44801 Bochum Deutschland
| | - Thorsten Scherpf
- Fakultät für Chemie und BiochemieLehrstuhl für Anorganische Chemie IIRuhr Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
| | - Ilja Rodstein
- Fakultät für Chemie und BiochemieLehrstuhl für Anorganische Chemie IIRuhr Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
| | - Dominik Lichte
- Evonik Lehrstuhl für Organische ChemieRuhr Universität Bochum, ZEMOS Universitätsstraße 150 44801 Bochum Deutschland
| | - Lennart T. Scharf
- Fakultät für Chemie und BiochemieLehrstuhl für Anorganische Chemie IIRuhr Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
| | - Lukas J. Gooßen
- Evonik Lehrstuhl für Organische ChemieRuhr Universität Bochum, ZEMOS Universitätsstraße 150 44801 Bochum Deutschland
| | - Viktoria H. Gessner
- Fakultät für Chemie und BiochemieLehrstuhl für Anorganische Chemie IIRuhr Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
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10
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Weber P, Scherpf T, Rodstein I, Lichte D, Scharf LT, Gooßen LJ, Gessner VH. A Highly Active Ylide-Functionalized Phosphine for Palladium-Catalyzed Aminations of Aryl Chlorides. Angew Chem Int Ed Engl 2019; 58:3203-3207. [PMID: 30451339 DOI: 10.1002/anie.201810696] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Indexed: 11/10/2022]
Abstract
Ylide-functionalized phosphine ligands (YPhos) were rationally designed to fit the requirements of Buchwald-Hartwig aminations at room temperature. This ligand class combines a strong electron-donating ability comparable to NHC ligands with high steric demand similar to biaryl phosphines. The active Pd species are stabilized by agostic C-H⋅⋅⋅Pd rather than by Pd-arene interactions. The practical advantage of YPhos ligands arises from their easy and scalable synthesis from widely available, inexpensive starting materials. Benchmark studies showed that YPhos-Pd complexes are superior to the best-known phosphine ligands in room-temperature aminations of aryl chlorides. The utility of the catalysts was demonstrated by the synthesis of various arylamines in high yields within short reaction times.
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Affiliation(s)
- Philip Weber
- Evonik Chair of Organic Chemistry, Ruhr University Bochum, ZEMOS, Universitätsstr. 150, 44801, Bochum, Germany
| | - Thorsten Scherpf
- Faculty of Chemistry and Biochemistry, Chair of Inorganic Chemistry II, Ruhr University Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Ilja Rodstein
- Faculty of Chemistry and Biochemistry, Chair of Inorganic Chemistry II, Ruhr University Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Dominik Lichte
- Evonik Chair of Organic Chemistry, Ruhr University Bochum, ZEMOS, Universitätsstr. 150, 44801, Bochum, Germany
| | - Lennart T Scharf
- Faculty of Chemistry and Biochemistry, Chair of Inorganic Chemistry II, Ruhr University Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Lukas J Gooßen
- Evonik Chair of Organic Chemistry, Ruhr University Bochum, ZEMOS, Universitätsstr. 150, 44801, Bochum, Germany
| | - Viktoria H Gessner
- Faculty of Chemistry and Biochemistry, Chair of Inorganic Chemistry II, Ruhr University Bochum, Universitätsstr. 150, 44801, Bochum, Germany
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11
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Gallen A, Riera A, Verdaguer X, Grabulosa A. Coordination chemistry and catalysis with secondary phosphine oxides. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01501a] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Review on synthesis, coordination chemistry and catalysis with secondary phosphine oxides.
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Affiliation(s)
- Albert Gallen
- Departament de Química Inorgànica i Orgànica
- Secció de Química Inorgànica
- Universitat de Barcelona
- Barcelona
- Spain
| | - Antoni Riera
- Institute for Research in Biomedicine (IRB-Barcelona)
- The Barcelona Institute of Science and Technology
- Barcelona 08028
- Spain
- Departament de Química Inorgànica i Orgànica
| | - Xavier Verdaguer
- Institute for Research in Biomedicine (IRB-Barcelona)
- The Barcelona Institute of Science and Technology
- Barcelona 08028
- Spain
- Departament de Química Inorgànica i Orgànica
| | - Arnald Grabulosa
- Departament de Química Inorgànica i Orgànica
- Secció de Química Inorgànica
- Universitat de Barcelona
- Barcelona
- Spain
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12
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Henyecz R, Mucsi Z, Keglevich G. Palladium-catalyzed microwave-assisted Hirao reaction utilizing the excess of the diarylphosphine oxide reagent as the P-ligand; a study on the activity and formation of the “PdP2” catalyst. PURE APPL CHEM 2018. [DOI: 10.1515/pac-2018-1004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The microwave-assisted Hirao reaction of bromobenzene and diarylphosphine oxides was performed at 120 °C using triethylamine as the base, and 5% of palladium acetate as the catalyst in ethanol. 5% Excess of the >P(O)H reagent served as the reducing agent, while another 10% as the preligand (in the >POH tautomeric form). It was found that the P–C coupling reaction was significantly faster with (2-MeC6H4)2P(O)H (A) and (3,5-diMeC6H3)2P(O)H (B), than with Ph2P(O)H (C) and (4-MeC6H4)2P(O)H (D). Moreover, species A and B could be applied as selective P-ligands in the reaction of bromobenzene with C or D. Dependence of the effectiveness of “PdP2” catalysts with diarylphosphine oxide preligands on the methyl substituents followed a reversed order as the reactivity of the diarylphosphine oxide species in the P–C coupling itself. Formation of the “PdP2” catalyst from palladium acetate and diarylphosphine oxide has never been studied, but now it was evaluated by us at the B3LYP level of theory applying 6-31G(d,p) for C,H,P,O and SDD/MW28 for Pd including the explicit-implicit solvent model. The novel mechanism requiring three equivalents of the >P(O)H species for each of the palladium acetate molecule was in agreement with the preparative experiments. The ligation of palladium(0) with different P(III) species comprising the >POH form of the >P(O)H reagent was also studied, and the critical role of the steric hindrance on the ligation, and hence on the activity of the “PdP2” catalyst was substantiated. Last but not least, the influence of the Me substituents in the aromatic ring of the P-reagents on the energetics of the elemental steps of the Hirao reaction itself was also evaluated.
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Affiliation(s)
- Réka Henyecz
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest 1521 , Hungary
| | - Zoltán Mucsi
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest 1521 , Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest 1521 , Hungary
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13
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Ji W, Liu YA, Liao X. Transition-Metal-Free Synthesis of N-Hydroxy Oxindoles by an Aza-Nazarov-Type Reaction Involving Azaoxyallyl Cations. Angew Chem Int Ed Engl 2018; 55:13286-13289. [PMID: 27709823 DOI: 10.1002/anie.201607177] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Indexed: 01/15/2023]
Abstract
A novel transition-metal-free method to construct N-hydroxy oxindoles by an aza-Nazarov-type reaction involving azaoxyallyl cation intermediates is described. A variety of functional groups were tolerated under the weak basic reaction conditions and at room temperature. A one-pot process was also developed to make the reaction even more practical. This method provides alternative access to oxindoles and their biologically active derivatives.
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Affiliation(s)
- Wenzhi Ji
- School of Pharmaceutical Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University, China
| | - Yahu A Liu
- Medicinal Chemistry, Genomics Institute of the Novartis Research Foundation, San Diego, CA, 92121, USA
| | - Xuebin Liao
- School of Pharmaceutical Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University, China.
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14
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Reddy Panyam PK, Ugale B, Gandhi T. Palladium(II)/N-Heterocyclic Carbene Catalyzed One-Pot Sequential α-Arylation/Alkylation: Access to 3,3-Disubstituted Oxindoles. J Org Chem 2018; 83:7622-7632. [PMID: 29882669 DOI: 10.1021/acs.joc.8b00264] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rationally designed fluorene-based mono- and bimetallic Pd-PEPPSI complexes were synthesized and demonstrated to be effective for the one-pot sequential α-arylation/alkylation of oxindoles. This streamlined approach offers efficient access to functionalized 3,3-disubstituted oxindoles in excellent yields (up to 89%) under mild reaction conditions.
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Affiliation(s)
| | - Bharat Ugale
- Department of Chemistry , Indian Institute of Technology Ropar , Rupnagar , Punjab 140001 , India
| | - Thirumanavelan Gandhi
- Department of Chemistry, School of Advanced Sciences , VIT University , Vellore 632014 , India
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15
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Astarloa I, SanMartin R, Herrero MT, Domínguez E. Aqueous α-Arylation of Mono- and Diarylethanone Enolates at Low Catalyst Loading. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701596] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Iratxe Astarloa
- Department of Organic Chemistry II, Faculty of Science and Technology; University of the Basque Country (UPV/EHU) Sarriena auzoa; z/g 48940 Leioa Spain
| | - Raul SanMartin
- Department of Organic Chemistry II, Faculty of Science and Technology; University of the Basque Country (UPV/EHU) Sarriena auzoa; z/g 48940 Leioa Spain
| | - María Teresa Herrero
- Department of Organic Chemistry II, Faculty of Science and Technology; University of the Basque Country (UPV/EHU) Sarriena auzoa; z/g 48940 Leioa Spain
| | - Esther Domínguez
- Department of Organic Chemistry II, Faculty of Science and Technology; University of the Basque Country (UPV/EHU) Sarriena auzoa; z/g 48940 Leioa Spain
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16
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Cyclization and oxidation of o -bromophenylacetamides for the synthesis of oxindoles and isoindigoes. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.12.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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17
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Keglevich G, Henyecz R, Mucsi Z, Kiss NZ. The Palladium Acetate-Catalyzed Microwave-Assisted Hirao Reaction without an Added Phosphorus Ligand as a "Green" Protocol: A Quantum Chemical Study on the Mechanism. Adv Synth Catal 2017; 359:4322-4331. [PMID: 29399016 PMCID: PMC5767766 DOI: 10.1002/adsc.201700895] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 10/03/2017] [Indexed: 12/21/2022]
Abstract
It was proved by our experiments that on microwave irradiation, the mono‐ or bidentate phosphorus ligands generally applied in the palladium(II)‐catalyzed P–C coupling reaction of aryl bromides and dialkyl phosphites or secondary phosphine oxides may be substituted by the excess of the >P(O)H reagent that exists under a tautomeric equilibrium. Taking into account that the reduction of the palladium(II) salt and the ligation of the palladium(0) so formed requires 3 equivalents of the P‐species for the catalyst applied in a quantity of 5–10%, all together, 15–30% of the P‐reagent is necessary beyond its stoichiometric quantity. In the coupling reaction of diphenylphosphine oxide, it was possible to apply diethyl phosphite as the reducing agent and as the P‐ligand. The reactivities of the diethyl phosphite and diphenylphosphine oxide reagents were compared in a competitive reaction. The mechanism and the energetics of this new variation of the Hirao reaction of bromobenzene with Y2P(O)H reagents (Y=EtO and Ph) was explored by quantum chemical calculations. The first detailed study on simple reaction models justified our assumption that, under the conditions of the reaction, the trivalent form of the >P(O)H reagent may serve as the P‐ligand in the palladium(0) catalyst, and shed light on the fine mechanism of the reaction sequence. The existence of the earlier described bis(palladium complex) {[H(OPh2P)2PdOAc]2} was refuted by high level theoretical calculations. This kind of complex may be formed only with chloride anions instead of the acetate anion. The interaction of palladium acetate and Y2P(O)H may result in only the formation of the [(HO)Y2P]2Pd complex that is the active catalyst in the Hirao reaction. The new variation of the Hirao reaction is of a more general value, and represents the greenest protocol, as there is no need for the usual P‐ligands. Instead, the >P(O)H reagent should be used in an excess of up to 30%. Hence, the costs and environmental burdens may be decreased. ![]()
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Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology Budapest University of Technology and Economics 1521 Budapest Hungary
| | - Réka Henyecz
- Department of Organic Chemistry and Technology Budapest University of Technology and Economics 1521 Budapest Hungary
| | - Zoltán Mucsi
- Department of Organic Chemistry and Technology Budapest University of Technology and Economics 1521 Budapest Hungary
| | - Nóra Zs Kiss
- Department of Organic Chemistry and Technology Budapest University of Technology and Economics 1521 Budapest Hungary
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18
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Chen YC, Chou HM, Kao IH, Chang YC, Hong FE. Secondary phosphine oxides assisted palladium complexes catalyzed catellani reaction for the formation of carbazole derivatives. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.07.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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19
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Ghorai D, Müller V, Keil H, Stalke D, Zanoni G, Tkachenko BA, Schreiner PR, Ackermann L. Secondary Phosphine Oxide Preligands for Palladium-Catalyzed C-H (Hetero)Arylations: Efficient Access to Pybox Ligands. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700663] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Debasish Ghorai
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität; Tammannstraße 2 37077 Göttingen Germany
- Department of Chemistry; University of Pavia; Viale Taramelli, 10 27100 Pavia Italy
| | - Valentin Müller
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität; Tammannstraße 2 37077 Göttingen Germany
| | - Helena Keil
- Institut für Anorganische Chemie; Georg-August-Universität; Tammannstraße 4 37077 Göttingen Germany
| | - Dietmar Stalke
- Institut für Anorganische Chemie; Georg-August-Universität; Tammannstraße 4 37077 Göttingen Germany
| | - Giuseppe Zanoni
- Department of Chemistry; University of Pavia; Viale Taramelli, 10 27100 Pavia Italy
| | - Boryslav A. Tkachenko
- Institute of Organic Chemistry; Justus-Liebig University; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry; Justus-Liebig University; Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie; Georg-August-Universität; Tammannstraße 2 37077 Göttingen Germany
- Department of Chemistry; University of Pavia; Viale Taramelli, 10 27100 Pavia Italy
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20
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Duan J, Kwong FY. A Palladium-Catalyzed α-Arylation of Oxindoles with Aryl Tosylates. J Org Chem 2017; 82:6468-6473. [PMID: 28539045 DOI: 10.1021/acs.joc.7b00855] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A palladium-catalyzed monoselective C3 arylation of 2-oxindoles with aryl tosylates is described. With the Pd/CM-phos catalyst system, the corresponding 3-arylated oxindoles can be obtained in good to excellent yields (≤97%). The reaction conditions are mild (using 0.5 mol % Pd in general and KF as a base), and functional groups such as methyl ester, NH amido, and enolizable keto moieties are found to be compatible.
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Affiliation(s)
- Jindian Duan
- Department of Applied Biology and Chemical Technology and SKL of Chirosciences, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong
| | - Fuk Yee Kwong
- Department of Applied Biology and Chemical Technology and SKL of Chirosciences, The Hong Kong Polytechnic University , Hung Hom, Kowloon, Hong Kong.,Department of Chemistry, The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong
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21
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Roh HJ, Seo DY, Ryu JY, Lee J, Kim JN. One-Pot Synthesis of 3-(Benzo[e
]indol-2-yl)-2-oxindoles from Isatin-derived Propargylic Alcohols and N
-Acetyl-2-aminonaphthalenes. B KOREAN CHEM SOC 2017. [DOI: 10.1002/bkcs.11127] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hwa Jung Roh
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Da Young Seo
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Ji Yeon Ryu
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Junseong Lee
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
| | - Jae Nyoung Kim
- Department of Chemistry and Institute of Basic Science; Chonnam National University; Gwangju 500-757 Korea
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22
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A new and convenient approach for the synthesis of P-stereogenic intermediates bearing a tert-butyl(methyl)phosphino group. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-2923-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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23
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Han ZS, Wu H, Xu Y, Zhang Y, Qu B, Li Z, Caldwell DR, Fandrick KR, Zhang L, Roschangar F, Song JJ, Senanayake CH. General and Stereoselective Method for the Synthesis of Sterically Congested and Structurally Diverse P-Stereogenic Secondary Phosphine Oxides. Org Lett 2017; 19:1796-1799. [DOI: 10.1021/acs.orglett.7b00568] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Zhengxu S. Han
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Hao Wu
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Yibo Xu
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Yongda Zhang
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Bo Qu
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Zhibin Li
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Donald R. Caldwell
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Keith R. Fandrick
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Li Zhang
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Frank Roschangar
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Jinhua J. Song
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
| | - Chris H. Senanayake
- Department of Chemical
Development, Boehringer Ingelheim Pharmaceuticals, Inc., 900 Old Ridgebury Road, P.O. Box 368, Ridgefield, Connecticut 06877, United States
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24
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Vasseur A, Membrat R, Gatineau D, Tenaglia A, Nuel D, Giordano L. Secondary Phosphine Oxides as Multitalented Preligands En Route to the Chemoselective Palladium-Catalyzed Oxidation of Alcohols. ChemCatChem 2017. [DOI: 10.1002/cctc.201601261] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Alexandre Vasseur
- Aix-Marseille Univ, CNRS; Centrale Marseille, iSm2; Marseille France
| | - Romain Membrat
- Aix-Marseille Univ, CNRS; Centrale Marseille, iSm2; Marseille France
| | - David Gatineau
- Aix-Marseille Univ, CNRS; Centrale Marseille, iSm2; Marseille France
| | - Alphonse Tenaglia
- Aix-Marseille Univ, CNRS; Centrale Marseille, iSm2; Marseille France
| | - Didier Nuel
- Aix-Marseille Univ, CNRS; Centrale Marseille, iSm2; Marseille France
| | - Laurent Giordano
- Aix-Marseille Univ, CNRS; Centrale Marseille, iSm2; Marseille France
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25
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Ji W, Liu YA, Liao X. Transition-Metal-Free Synthesis of N
-Hydroxy Oxindoles by an Aza-Nazarov-Type Reaction Involving Azaoxyallyl Cations. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607177] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Wenzhi Ji
- School of Pharmaceutical Sciences; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Tsinghua University; China
| | - Yahu A. Liu
- Medicinal Chemistry; Genomics Institute of the Novartis Research Foundation; San Diego CA 92121 USA
| | - Xuebin Liao
- School of Pharmaceutical Sciences; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Tsinghua University; China
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26
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One-pot synthesis of 3-naphtho[2,1-b]furanyl-2-oxindoles from 3-(arylethynyl)-3-hydroxyindolin-2-ones and 2-naphthols. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.08.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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27
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Hu C, Chen Y, Lin G, Huang M, Chang Y, Hong F. Preparation of Secondary Phosphine Oxide Ligands through Nucleophilic Attack on Imines and Their Applications in Palladium‐Catalyzed Catellani Reactions. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600181] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chan‐Yu Hu
- Department of Chemistry National Chung Hsing University 250 Kuo‐Kuang Road40227TaichungTaiwan
| | - Ya‐Qian Chen
- Department of Chemistry National Chung Hsing University 250 Kuo‐Kuang Road40227TaichungTaiwan
| | - Guan‐Yu Lin
- Department of Chemistry National Chung Hsing University 250 Kuo‐Kuang Road40227TaichungTaiwan
| | - Ming‐Kai Huang
- Department of Chemistry National Chung Hsing University 250 Kuo‐Kuang Road40227TaichungTaiwan
| | - Yu‐Chang Chang
- Department of Chemistry National Chung Hsing University 250 Kuo‐Kuang Road40227TaichungTaiwan
| | - Fung‐E Hong
- Department of Chemistry National Chung Hsing University 250 Kuo‐Kuang Road40227TaichungTaiwan
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28
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29
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Chang YC, Liang YH, Hong FE. Preparations of Saturated N-P-N Type Secondary Phosphine Oxides and their Applications in Cross-Coupling Reactions. J CHIN CHEM SOC-TAIP 2016. [DOI: 10.1002/jccs.201500445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Lim JW, Kim KH, Moon HR, Kim JN. Transition metal and base-free synthesis of 3,3-diaryl-2-oxindoles from 2,2,N-triarylacetamides. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.01.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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31
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Chang YC, Chang CH, Wang LW, Liang YH, Hu DF, Weng CM, Mao KC, Hong FE. Imidazolio-substituted secondary phosphine oxides as potential carbene reagents. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.08.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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32
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Mondal B, Roy B. Di-tert-butyl peroxide (DTBP) promoted dehydrogenative coupling: an expedient and metal-free synthesis of oxindoles via intramolecular C(sp2)–H and C(sp3)–H bond activation. RSC Adv 2015. [DOI: 10.1039/c5ra09055e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient di-tert-butyl peroxide (DTBP) promoted synthesis of oxindole has been developed. This methodology involves C(sp3)–H and C(sp2)–H bond activation under metal-free conditions.
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Affiliation(s)
- Biplab Mondal
- Department of Chemistry
- University of Kalyani
- Kalyani
- India
| | - Brindaban Roy
- Department of Chemistry
- University of Kalyani
- Kalyani
- India
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33
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Chang TW, Ho PY, Mao KC, Hong FE. Developing five-membered heterocycle substituted phosphinous acids as ligands for palladium-catalyzed Suzuki–Miyaura and Catellani reactions. Dalton Trans 2015; 44:17129-42. [DOI: 10.1039/c5dt02611c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Several secondary phosphine oxides (SPOs) were prepared. Organic products with unexpected conformations (9 and 10) were obtained besides 8 from Heck-type Catellani reactions with the assistance of the selected SPO ligand 5f.
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Affiliation(s)
- Ting-Wei Chang
- Department of Chemistry
- National Chung Hsing University
- Taichung 40227
- Taiwan
| | - Pei-Yun Ho
- Department of Chemistry
- National Chung Hsing University
- Taichung 40227
- Taiwan
| | - Kuo-Chung Mao
- Department of Chemistry
- National Chung Hsing University
- Taichung 40227
- Taiwan
| | - Fung-E. Hong
- Department of Chemistry
- National Chung Hsing University
- Taichung 40227
- Taiwan
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34
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Koch E, Takise R, Studer A, Yamaguchi J, Itami K. Ni-Catalyzed α-arylation of esters and amides with phenol derivatives. Chem Commun (Camb) 2014; 51:855-7. [PMID: 25429373 DOI: 10.1039/c4cc08426h] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nickel-catalyzed α-arylation of esters and amides with phenol derivatives has been accomplished. In the presence of our unique nickel catalyst, prepared in situ from Ni(cod)2, 3,4-bis(dicyclohexylphosphino)thiophene (dcypt), and K3PO4, various esters and amides undergo α-arylation with O-arylpivalates or O-arylcarbamates to afford the corresponding coupling products. The thus obtained α-aryl esters and amides are useful precursors of privileged motifs such as α-arylcarboxylic acids and β-arylamines.
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Affiliation(s)
- Eva Koch
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149 Münster, Germany
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35
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Rentería-Gómez A, Islas-Jácome A, Jiménez-Halla JOC, Gámez-Montaño R. Regiospecific synthesis of 1-acetamide-5-methoxy-2-oxindoles in two steps: (Ugi-SN2)/xanthate mediated free radical cyclization. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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36
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Zhou F, Driver TG. Efficient synthesis of 3H-indoles enabled by the lead-mediated α-arylation of β-ketoesters or γ-lactams using aryl azides. Org Lett 2014; 16:2916-9. [PMID: 24865180 PMCID: PMC4059265 DOI: 10.1021/ol5010615] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Indexed: 11/29/2022]
Abstract
The development of a lead-mediated α-arylation reaction between aryl azides and β-ketoesters or γ-lactams that facilitates the formation of 3H-indoles is disclosed. Twenty-five examples are included which demonstrate the generality of this reaction to access aryl azides bearing tetrasubstituted o-alkyl substituents. When paired with a Staudinger reduction, this reaction streamlines the synthesis of functionalized 3H-indoles.
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Affiliation(s)
- Fei Zhou
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Tom G. Driver
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
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37
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Mai WP, Wang JT, Yang LR, Yuan JW, Xiao YM, Mao P, Qu LB. Silver-Catalyzed Radical Tandem Cyclization for the Synthesis of 3,4-Disubstituted Dihydroquinolin-2(1H)-ones. Org Lett 2013; 16:204-7. [DOI: 10.1021/ol403196h] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wen-Peng Mai
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Ji-Tao Wang
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Liang-Ru Yang
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Jin-Wei Yuan
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Yong-Mei Xiao
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Pu Mao
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
| | - Ling-Bo Qu
- Chemistry and Chemical Engineering
School, Henan University of Technology, Zhengzhou, Henan 450001, P. R. China
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38
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Zhou ZZ, Hua HL, Luo JY, Chen ZS, Zhou PX, Liu XY, Liang YM. Metal-free synthesis of 3,3-disubstituted oxindoles via 1,2-alkylarylation of activated alkenes with alcohols. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.09.058] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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39
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Zheng B, Jia T, Walsh PJ. Palladium-catalyzed direct intermolecular α-arylation of amides with aryl chlorides. Org Lett 2013; 15:4190-3. [PMID: 23909856 DOI: 10.1021/ol4019002] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient catalytic system for the direct intermolecular α-arylation of acetamide derivatives with aryl chlorides is presented. Chemoselectivities up to 10:1 in the mono- and diarylation of acetamides were achieved by careful selection of bases, solvents, and stoichiometry. Bis-arylated amides were prepared in up to 95% yield.
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Affiliation(s)
- Bing Zheng
- Department of Applied Chemistry, China Agricultural University, Beijing 100193, P. R. China
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40
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Shi Y, Zhu X, Mao H, Hu H, Zhu C, Cheng Y. Synthesis of Functionalized Isoquinolin-1(2H)-ones by Copper-Catalyzed α-Arylation of Ketones with 2-Halobenzamides. Chemistry 2013; 19:11553-7. [DOI: 10.1002/chem.201301621] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Indexed: 11/12/2022]
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41
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Matcha K, Narayan R, Antonchick AP. Metal-Free Radical Azidoarylation of Alkenes: Rapid Access to Oxindoles by Cascade CN and CC Bond-Forming Reactions. Angew Chem Int Ed Engl 2013; 52:7985-9. [DOI: 10.1002/anie.201303550] [Citation(s) in RCA: 243] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Indexed: 01/02/2023]
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42
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Matcha K, Narayan R, Antonchick AP. Metallfreie radikalische Azidoarylierung von Alkenen: schneller Zugang zu Oxindolen durch kaskadenförmige C-N- und C-C-Bindungsbildung. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303550] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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43
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Hastings SD, Byrd H, Gray LN, Jablonsky MJ, Freeman JL, Gray GM. Multinuclear NMR Spectroscopic and X‐ray Crystallographic Studies of Electronic and Steric Effects of Phosphonous Acid Ligands and Their Chlorophosphite Ligand Precursors in Tungsten Pentacarbonyl Complexes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300121] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Samantha D. Hastings
- Department of Chemistry, University of Alabama at Birmingham, 901 14th Street South, Birmingham, AL 35294‐1240, USA, Fax: +1‐205‐934‐2543, http://www.uab.edu/chemistry/
| | - Houston Byrd
- Department of Chemistry, University of Montevallo, Harman Hall, Station 6480, Montevallo, AL 35115, USA
| | - Leanne N. Gray
- Department of Chemistry, University of Montevallo, Harman Hall, Station 6480, Montevallo, AL 35115, USA
| | - Michael J. Jablonsky
- Department of Chemistry, University of Alabama at Birmingham, 901 14th Street South, Birmingham, AL 35294‐1240, USA, Fax: +1‐205‐934‐2543, http://www.uab.edu/chemistry/
| | - Jason L. Freeman
- Department of Chemistry, University of Alabama at Birmingham, 901 14th Street South, Birmingham, AL 35294‐1240, USA, Fax: +1‐205‐934‐2543, http://www.uab.edu/chemistry/
| | - Gary M. Gray
- Department of Chemistry, University of Alabama at Birmingham, 901 14th Street South, Birmingham, AL 35294‐1240, USA, Fax: +1‐205‐934‐2543, http://www.uab.edu/chemistry/
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44
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Mandel J, Pan X, Hay EB, Geib SJ, Wilcox CS, Curran DP. Rotational isomers of N-methyl-N-arylacetamides and their derived enolates: implications for asymmetric Hartwig oxindole cyclizations. J Org Chem 2013; 78:4083-9. [PMID: 23534372 DOI: 10.1021/jo400385t] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The rotational preferences of N-(2-bromo-4,6-dimethylphenyl)-N-methyl 2-phenylpropanamide were studied as a model of precursors for Hartwig asymmetric oxindole cyclizations. The atropisomers of this compound were separated by flash chromatography, and then the enantiomers were resolved and the interconversions of the stereocenter and the N-Ar axis were studied. Under thermal conditions, the axis is very stable. Under the basic conditions of the Hartwig cyclization, both the stereocenter and the chiral axis equilibrate via enolate formation. The N-Ar rotation barrier of a 2-phenylacetamide analogue was reduced from 31 kcal mol(-1) in the precursor to 17 kcal mol(-1) in the enolate. Reasons for this dramatic barrier reduction and implications of both N-Ar and amide C-N rotations for Hartwig cyclizations are discussed.
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Affiliation(s)
- Jérémie Mandel
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
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45
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Preparation and application of indolyl secondary phosphine oxides in palladium complexes catalyzed Suzuki–Miyaura cross-coupling reaction. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.01.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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46
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Wei WT, Zhou MB, Fan JH, Liu W, Song RJ, Liu Y, Hu M, Xie P, Li JH. Synthesis of Oxindoles by Iron-Catalyzed Oxidative 1,2-Alkylarylation of Activated Alkenes with an Aryl C(sp2)H Bond and a C(sp3)H Bond Adjacent to a Heteroatom. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201210029] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Wei WT, Zhou MB, Fan JH, Liu W, Song RJ, Liu Y, Hu M, Xie P, Li JH. Synthesis of Oxindoles by Iron-Catalyzed Oxidative 1,2-Alkylarylation of Activated Alkenes with an Aryl C(sp2)H Bond and a C(sp3)H Bond Adjacent to a Heteroatom. Angew Chem Int Ed Engl 2013; 52:3638-41. [DOI: 10.1002/anie.201210029] [Citation(s) in RCA: 329] [Impact Index Per Article: 29.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Revised: 01/15/2012] [Indexed: 11/06/2022]
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Verma AK, Jha RR, Chaudhary R, Tiwari RK, Danodia AK. 2-(1-Benzotriazolyl)pyridine: A Robust Bidentate Ligand for the Palladium-Catalyzed CC (Suzuki, Heck, Fujiwara-Moritani, Sonogashira), CN and CS Coupling Reactions. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201200583] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Liu X, Hamasaki A, Yamane Y, Aikawa S, Ishida T, Haruta M, Tokunaga M. Gold nanoparticles assisted formation of cobalt species for intermolecular hydroaminomethylation and intramolecular cyclocarbonylation of olefins. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00336a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Beyer A, Buendia J, Bolm C. Transition-metal-free synthesis of oxindoles by potassium tert-butoxide-promoted intramolecular α-arylation. Org Lett 2012; 14:3948-51. [PMID: 22794114 DOI: 10.1021/ol301704z] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Potassium tert-butoxide-mediated intramolecular α-arylations of fluoro- and chloro-substituted anilides provide oxindoles in DMF at 80 °C. In this manner, diversely substituted products have been obtained in moderate to high yields.
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Affiliation(s)
- Astrid Beyer
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
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