1
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Bouda M, Bertke JA, Wolf C. Organocatalytic Asymmetric Conjugate Addition of Fluorooxindoles to Quinone Methides. J Org Chem 2024; 89:6100-6105. [PMID: 38619814 PMCID: PMC11077483 DOI: 10.1021/acs.joc.4c00062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/24/2024] [Accepted: 04/03/2024] [Indexed: 04/16/2024]
Abstract
Fluorooxindoles undergo asymmetric Michael addition to para-quinone methides under phase-transfer conditions with 10 mol% of a readily available cinchona alkaloid ammonium catalyst. This reaction affords sterically encumbered, multifunctional fluorinated organic compounds displaying two adjacent chirality centers with high yields, ee's and dr's.
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Affiliation(s)
- Maria Bouda
- Chemistry Department, Georgetown University, Washington, D.C. 20057, United States
| | - Jeffery A. Bertke
- Chemistry Department, Georgetown University, Washington, D.C. 20057, United States
| | - Christian Wolf
- Chemistry Department, Georgetown University, Washington, D.C. 20057, United States
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2
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Yuan A, Steber SE, Xhili D, Nelson E, Wolf C. Enantioseparation and racemization of 3-fluorooxindoles. Chirality 2023; 35:619-624. [PMID: 37129272 PMCID: PMC10516598 DOI: 10.1002/chir.23572] [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: 01/09/2023] [Revised: 04/03/2023] [Accepted: 04/17/2023] [Indexed: 05/03/2023]
Abstract
Fluorinated oxindoles are frequently used building blocks in asymmetric synthesis and represent an important scaffold found in a variety of biologically relevant compounds. While it is understood that incorporation of fluorine atoms into organic molecules can improve their pharmacological properties, the impact on the configurational stability of chiral organofluorines is still underexplored. In this study, semipreparative HPLC enantioseparations of five oxindoles were carried out, and the resulting enantiomerically enriched solutions were used to investigate base promoted racemization kinetics at room temperature. It was found that incorporation of fluorine at the chiral center increases the configurational stability, while substitutions on the aromatic ring and at the lactam moiety also have significant effects on the rate of racemization, which generally follows reversible first-order reaction kinetics.
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Affiliation(s)
- Andi Yuan
- Department of Chemistry, Georgetown University, Washington, DC, USA
| | - Sarah E Steber
- Department of Chemistry, Georgetown University, Washington, DC, USA
| | - Dea Xhili
- Department of Chemistry, Georgetown University, Washington, DC, USA
| | - Eryn Nelson
- Department of Chemistry, Georgetown University, Washington, DC, USA
| | - Christian Wolf
- Department of Chemistry, Georgetown University, Washington, DC, USA
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3
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Ahmad T, Khan S, Ullah N. Recent Advances in the Catalytic Asymmetric Friedel-Crafts Reactions of Indoles. ACS OMEGA 2022; 7:35446-35485. [PMID: 36249392 PMCID: PMC9558610 DOI: 10.1021/acsomega.2c05022] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Functionalized chiral indole derivatives are privileged and versatile organic frameworks encountered in numerous pharmaceutically active agents and biologically active natural products. The catalytic asymmetric Friedel-Crafts reaction of indoles, catalyzed by chiral metal complexes or chiral organocatalysts, is one of the most powerful and atom-economical approaches to access optically active indole derivatives. Consequently, a wide range of electrophilic partners including α,β-unsaturated ketones, esters, amides, imines, β,γ-unsaturated α-keto- and α-ketiminoesters, ketimines, nitroalkenes, and many others have been successfully employed to achieve a plethora of functionalized chiral indole moieties. In particular, strategies for C-H functionalization in the phenyl of indoles require incorporation of a directing or blocking group in the phenyl or azole ring of indole. The discovery of chiral catalysts which can control enantiodiscrimination has gained a great deal of attention in recent years. This review will provide an updated account on the application of the asymmetric Friedel-Crafts reaction of indoles in the synthesis of diverse chiral indole derivatives, covering the timeframe from 2011 to today.
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Affiliation(s)
- Tauqir Ahmad
- Chemistry
Department, King Fahd University of Petroleum
and Minerals, Dhahran 31261, Saudi Arabia
| | - Sardaraz Khan
- Chemistry
Department, King Fahd University of Petroleum
and Minerals, Dhahran 31261, Saudi Arabia
| | - Nisar Ullah
- Chemistry
Department, King Fahd University of Petroleum
and Minerals, Dhahran 31261, Saudi Arabia
- The
Center for Refining & Advanced Chemicals, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
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4
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Homobinuclear compounds based on a chiral oxazolidine ligand: From solid state study to aqueous solution dynamics. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120664] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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5
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Wang P, Ni J, An Y, Chen X, Zhang W, Zhang Y, Ma G. Heterogeneously Organocatalytic, Enantioselective Friedel-Crafts Alkylation of Indole with 3,3,3-Trifluoropyruvate. HETEROCYCLES 2022. [DOI: 10.3987/com-21-14566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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6
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Balaraman K, Wolf C. Palladium and Nickel Catalyzed Suzuki Cross-Coupling with Alkyl Fluorides. Org Lett 2021; 23:8994-8999. [PMID: 34723542 DOI: 10.1021/acs.orglett.1c03515] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Suzuki cross-coupling of benzylic and unactivated aliphatic fluorides with aryl- and alkenylboronic acids has been achieved via mechanistically distinct Pd and Ni catalyzed pathways that outperform competing protodeboronation, β-hydride elimination, and homocoupling processes. The utility is demonstrated with more than 20 examples including heterocyclic structures, 1,1-disubstituted and trans-1,2-disubstituted alkenes, and by the incorporation of acetonitrile into functionalized (hetero)arenes.
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Affiliation(s)
- Kaluvu Balaraman
- Georgetown University, Chemistry Department, Washington, District of Columbia 20057, United States
| | - Christian Wolf
- Georgetown University, Chemistry Department, Washington, District of Columbia 20057, United States
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7
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Steber SE, Pham ANDL, Nelson E, Wolf C. Enantioseparation and racemization of α-aryl-α-fluoroacetonitriles. Chirality 2021; 33:891-898. [PMID: 34598313 DOI: 10.1002/chir.23367] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/02/2021] [Accepted: 09/12/2021] [Indexed: 12/15/2022]
Abstract
The 2-Aryl-2-fluoroacetonitriles have garnered increasing interest as versatile building blocks in asymmetric synthesis. However, the configurational stability of these organofluorines is poorly understood and analytical methods that can be used to differentiate between their enantiomers remain underdeveloped. In this study, baseline high performance liquid chromatography (HPLC) enantioseparation of ten 2-aryl-2-fluoroacetonitriles was achieved by screening frequently used chiral stationary phases. While Chiralcel OD, Chiralpak AD, and Chiralpak AS proved to be most broadly useful, preparative separation of the enantiomers of 2-(2-naphthyl)-2-fluoroacetonitrile was possible on Chiralcel OJ. This enabled racemization studies at various temperatures and in the presence of organic bases which showed that this compound is configurationally stable under neutral conditions upon heating to 130°C for 6 h but undergoes complete racemization within 10 h in the presence of stoichiometric amounts of a guanidine base at room temperature. The racemization is likely to proceed via formation of an achiral keteniminate intermediate and obeys reversible first-order reaction kinetics with a half-life time of 87.7 min in ethanolic hexanes at 23.2°C. Racemization is significantly slower and occurs with a half-life time of 23.1 h at 22.4°C when the guanidine is replaced with a weaker amidine base.
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Affiliation(s)
- Sarah E Steber
- Department of Chemistry, Georgetown University, Washington, District of Columbia, USA
| | - Angelette N D L Pham
- Department of Chemistry, Georgetown University, Washington, District of Columbia, USA
| | - Eryn Nelson
- Department of Chemistry, Georgetown University, Washington, District of Columbia, USA
| | - Christian Wolf
- Department of Chemistry, Georgetown University, Washington, District of Columbia, USA
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8
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Bhattacharjee P, Bora U. Organocatalytic dimensions to the C–H functionalization of the carbocyclic core in indoles: a review update. Org Chem Front 2021. [DOI: 10.1039/d0qo01466d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A review highlighting important research findings in remote C–H activation processes using effectual organocatalytic perspectives. The challenging indole carbocyclic ring positions were successfully accessed with proper regio- and stereocontrols.
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Affiliation(s)
| | - Utpal Bora
- Department of Chemical Sciences
- Tezpur University
- Tezpur
- India
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9
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Zhao Y, Cai L, Huang T, Meng S, Chan ASC, Zhao J. Solvent‐Mediated C3/C7 Regioselective Switch in Chiral Phosphoric Acid‐Catalyzed Enantioselective Friedel‐Crafts Alkylation of Indoles with α‐Ketiminoesters. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901380] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yunlong Zhao
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Lu Cai
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Tongkun Huang
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Shanshui Meng
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Albert S. C. Chan
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Junling Zhao
- Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
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10
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Deng XF, Wang YW, Zhang SQ, Li L, Li GX, Zhao G, Tang Z. An organocatalytic asymmetric Friedel-Crafts reaction of 2-substituted indoles with aldehydes: enantioselective synthesis of α-hydroxyl ketones by low loading of chiral phosphoric acid. Chem Commun (Camb) 2020; 56:2499-2502. [PMID: 32003369 DOI: 10.1039/c9cc09637j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Hydroxyl alkylation of indoles by Friedel-Crafts reaction with a carbonyl compound is a useful strategy. However, the reaction was restricted to ketones due to the easy formation of a bisindole byproduct. Therefore, hydroxyl alkylation of an aldehyde with indole is confronted with great challenges. Here, we report an efficient strategy for asymmetric hydroxyl alkylation of 2-substituted indoles with aldehydes under 0.1 mol% chiral phosphoric acid. A series of α-hydroxyl ketones were obtained in high yields (up to 99%) and good enantioselectivities (up to 97%).
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Affiliation(s)
- Xiong-Fei Deng
- College of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610041, P. R. China.
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11
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Gao Y, Wang X, Wei Z, Cao J, Liang D, Lin Y, Duan H. Asymmetric synthesis of spirooxindole–pyranoindole products via Friedel–Crafts alkylation/cyclization of the indole carbocyclic ring. NEW J CHEM 2020. [DOI: 10.1039/d0nj00074d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Enantioselective Friedel–Crafts alkylation/cyclization of the indole carbocyclic ring with isatylidene malononitriles was performed using a new bifunctional catalyst.
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Affiliation(s)
- Yuan Gao
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
| | - Xiaonan Wang
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
| | - Zhonglin Wei
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
| | - Jungang Cao
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
| | - Dapeng Liang
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
| | - Yingjie Lin
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
| | - Haifeng Duan
- Department of Organic Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- China
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12
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Huang T, Zhao Y, Meng S, Chan ASC, Zhao J. C7‐Functionalization of Indoles via Organocatalytic Enantioselective Friedel‐Crafts Alkylation of 4‐Amino‐ indoles with 2‐Butene‐1,4‐diones and 3‐Aroylacrylates. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900377] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Tongkun Huang
- School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Yunlong Zhao
- School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Shanshui Meng
- School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Albert S. C. Chan
- School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
| | - Junling Zhao
- School of Pharmaceutical SciencesSun Yat-sen University Guangzhou 510006 People's Republic of China
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13
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Moskowitz M, Wolf C. Catalytic Enantioselective Ynamide Additions to Isatins: Concise Access to Oxindole Alkaloids. Angew Chem Int Ed Engl 2019; 58:3402-3406. [PMID: 30695127 PMCID: PMC6444906 DOI: 10.1002/anie.201814074] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/28/2019] [Indexed: 11/05/2022]
Abstract
The highly enantioselective addition of terminal ynamides to a variety of isatins, catalyzed by a bisoxazolidine copper complex under mild, base-free reaction conditions, is described. The reaction is broad in scope, scalable, applicable to unprotected isatins, and provides efficient access to 3-hydroxyoxindoles carrying a tetrasubstituted chiral center with excellent yields and enantioselectivities. Synthetically versatile, multifunctional 3-hydroxyindolinones are obtained by hydration, partial hydrogenation, or hydroxyacyloxylation of the ynamide moiety at room temperature and exhaustive hydrogenation followed by reductive detosylation and spontaneous cyclization affords cinchonamidine alkaloids.
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Affiliation(s)
- Max Moskowitz
- Department of Chemistry, Georgetown University, 37 and O Streets, Washington, D.C. 20057 (USA)
| | - Christian Wolf
- Department of Chemistry, Georgetown University, 37 and O Streets, Washington, D.C. 20057 (USA)
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14
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Moskowitz M, Wolf C. Catalytic Enantioselective Ynamide Additions to Isatins: Concise Access to Oxindole Alkaloids. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814074] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Max Moskowitz
- Department of Chemistry; Georgetown University; 37 and O Streets Washington DC 20057 USA
| | - Christian Wolf
- Department of Chemistry; Georgetown University; 37 and O Streets Washington DC 20057 USA
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15
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Balaraman K, Moskowitz M, Wolf C. Organocatalytic Decarboxylative Cyanomethylation of Difluoromethyl and Trifluoromethyl Ketones. Adv Synth Catal 2018; 360:4705-4709. [PMID: 31289455 DOI: 10.1002/adsc.201800876] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An efficient organocatalytic method for the synthesis of difluoromethyl and trifluoromethyl substituted β-hydroxynitriles is introduced. The decarboxylative cyanomethylation of fluorinated ketones with readily available cyanoacetic acid gives a variety of tertiary alcohols in high yields and without concomitant water elimination. The reaction occurs in the presence of catalytic amounts of triethylamine, can be upscaled and applied to chlorofluoromethyl ketones and difluoromethyl ketimines.
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Affiliation(s)
- Kaluvu Balaraman
- Department of Chemistry, Georgetown University, 37 and O Streets, Washington, DC 20057, USA
| | - Max Moskowitz
- Department of Chemistry, Georgetown University, 37 and O Streets, Washington, DC 20057, USA
| | - Christian Wolf
- Department of Chemistry, Georgetown University, 37 and O Streets, Washington, DC 20057, USA
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16
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Le TP, Higashita K, Tanaka S, Yoshimura M, Kitamura M. Revisiting the CuII-Catalyzed Asymmetric Friedel–Crafts Reaction of Indole with Trifluoropyruvate. Org Lett 2018; 20:7149-7153. [DOI: 10.1021/acs.orglett.8b03086] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thien Phuc Le
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Kazuyuki Higashita
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Shinji Tanaka
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Masahiro Yoshimura
- Division of Liberal Arts and Sciences, Aichi Gakuin University, Iwasaki, Nisshin 470-0195, Japan
| | - Masato Kitamura
- Graduate School of Pharmaceutical Sciences and Research Center for Materials Science, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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17
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Bikas R, Ajormal F, Emami M, Noshiranzadeh N, Kozakiewicz A. Catalytic oxidation of benzyl alcohols by new Cu(II) complexes of 1,3-oxazolidine based ligand obtained from a solvent free reaction. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.03.038] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Liu JY, Yang XC, Lu H, Gu YC, Xu PF. Organocatalytic, Enantioselective Friedel–Crafts Reaction of Indoles in the Carbocyclic Ring and Electron-Rich Phenols. Org Lett 2018; 20:2190-2194. [DOI: 10.1021/acs.orglett.8b00503] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jin-Yu Liu
- State Key Laboratory of Applied Organic Chemistry, School of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xie-Chao Yang
- State Key Laboratory of Applied Organic Chemistry, School of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Hong Lu
- State Key Laboratory of Applied Organic Chemistry, School of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Yu-Cheng Gu
- Syngenta Jealott’s Hill International Research Centre, Bracknell, Berks RG42 6EY, United Kingdom
| | - Peng-Fei Xu
- State Key Laboratory of Applied Organic Chemistry, School of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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19
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Yang ZT, Yang WL, Chen L, Sun H, Deng WP. Organocatalytic Enantioselective aza-Friedel-Crafts Reactions of Pyrazolinone Ketimines with Hydroxyindoles and Electron-Rich Phenols. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800181] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Zhong-Tao Yang
- Shanghai Key Laboratory of New Drug Design and School of Pharmacy; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 People's Republic of China
| | - Wu-Lin Yang
- Shanghai Key Laboratory of New Drug Design and School of Pharmacy; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 People's Republic of China
| | - Long Chen
- Shanghai Key Laboratory of New Drug Design and School of Pharmacy; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 People's Republic of China
| | - Hao Sun
- Shanghai Key Laboratory of New Drug Design and School of Pharmacy; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 People's Republic of China
| | - Wei-Ping Deng
- Shanghai Key Laboratory of New Drug Design and School of Pharmacy; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 People's Republic of China
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20
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Xun W, Xu B, Chen B, Meng S, Chan ASC, Qiu FG, Zhao J. Regio and Enantioselective Organocatalytic Friedel-Crafts Alkylation of 4-Aminoindoles at the C7-Position. Org Lett 2018; 20:590-593. [PMID: 29341624 DOI: 10.1021/acs.orglett.7b03703] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A chiral phosphoric acid catalyzed highly regio- and enantioselective Friedel-Crafts alkylation at the indole C7-position was developed via the introduction of an alkylamine moiety at the C4-position of the indole ring. The methodology is applicable to a wide range of 4-aminoindoles and β,γ-unsaturated α-ketimino esters to furnish the corresponding C7-position functionalized chiral indole derivatives in high yields with moderate to excellent enantioselectivities. Furthermore, the α-ketimino ester moiety in the products is a versatile building block and enables many further transformations.
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Affiliation(s)
- Wen Xun
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences , Guangzhou 510530, P. R. China
| | - Bo Xu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences , Guangzhou 510530, P. R. China
| | - Bo Chen
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences , Guangzhou 510530, P. R. China
| | - Shanshui Meng
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, P. R. China
| | - Albert S C Chan
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, P. R. China
| | - Fayang G Qiu
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences , Guangzhou 510530, P. R. China
| | - Junling Zhao
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou 510006, P. R. China
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21
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Xiao M, Xu D, Liang W, Wu W, Chan ASC, Zhao J. Organocatalytic Enantioselective Friedel-Crafts Alkylation/Lactonization Reaction of Hydroxyindoles with Methyleneoxindoles. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201701089] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Mengjie Xiao
- Guangzhou Institutes of Biomedicine and Health; Chinese Academy of Sciences; Guangzhou 510530 Peoples Republic of China
- University of Chinese Academy of Sciences; Beijing 100049 People's Republic of China
| | - Dengfeng Xu
- Guangzhou Institutes of Biomedicine and Health; Chinese Academy of Sciences; Guangzhou 510530 Peoples Republic of China
| | - Weihong Liang
- Guangzhou Institutes of Biomedicine and Health; Chinese Academy of Sciences; Guangzhou 510530 Peoples Republic of China
- University of Chinese Academy of Sciences; Beijing 100049 People's Republic of China
| | - Wenyu Wu
- University of Chinese Academy of Sciences; Beijing 100049 People's Republic of China
| | - Albert S. C. Chan
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
| | - Junling Zhao
- School of Pharmaceutical Sciences; Sun Yat-sen University; Guangzhou 510006 People's Republic of China
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22
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Montesinos-Magraner M, Vila C, Blay G, Fernández I, Muñoz MC, Pedro JR. Hydroxy-Directed Enantioselective Hydroxyalkylation in the Carbocyclic Ring of Indoles. Org Lett 2017; 19:1546-1549. [DOI: 10.1021/acs.orglett.7b00354] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Marc Montesinos-Magraner
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, Burjassot, València 46100, Spain
| | - Carlos Vila
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, Burjassot, València 46100, Spain
| | - Gonzalo Blay
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, Burjassot, València 46100, Spain
| | - Isabel Fernández
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, Burjassot, València 46100, Spain
| | - M. Carmen Muñoz
- Departament
de Física Aplicada, Universitat Politècnica de València, València 46022, Spain
| | - José R. Pedro
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, Burjassot, València 46100, Spain
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23
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Chen JB, Jia YX. Recent progress in transition-metal-catalyzed enantioselective indole functionalizations. Org Biomol Chem 2017; 15:3550-3567. [DOI: 10.1039/c7ob00413c] [Citation(s) in RCA: 189] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Recent progress on the transition-metal-catalyzed enantioselective functionalization reaction of indoles is reviewed, which is mainly focused on asymmetric indole alkylations, arylations, cycloaddition reactions, and other reactions.
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Affiliation(s)
- Jing-Biao Chen
- College of Chemical Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- China
| | - Yi-Xia Jia
- College of Chemical Engineering
- Zhejiang University of Technology
- Hangzhou 310014
- China
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24
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Kasztelan A, Biedrzycki M, Kwiatkowski P. High-Pressure-Mediated Asymmetric Organocatalytic Hydroxyalkylation of Indoles with Trifluoromethyl Ketones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600327] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Adrian Kasztelan
- Faculty of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
| | - Michał Biedrzycki
- Faculty of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
| | - Piotr Kwiatkowski
- Faculty of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
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25
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Montesinos-Magraner M, Vila C, Rendón-Patiño A, Blay G, Fernández I, Muñoz MC, Pedro JR. Organocatalytic Enantioselective Friedel–Crafts Aminoalkylation of Indoles in the Carbocyclic Ring. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00260] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Marc Montesinos-Magraner
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner, 50, E-46100, Burjassot, València Spain
| | - Carlos Vila
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner, 50, E-46100, Burjassot, València Spain
| | - Alejandra Rendón-Patiño
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner, 50, E-46100, Burjassot, València Spain
| | - Gonzalo Blay
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner, 50, E-46100, Burjassot, València Spain
| | - Isabel Fernández
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner, 50, E-46100, Burjassot, València Spain
| | - M. Carmen Muñoz
- Departament
de Física Aplicada, Universitat Politècnica de València, C/Camí
de Vera, s/n, E-46022, València, Spain
| | - José R. Pedro
- Departament
de Química Orgànica, Facultat de Química, Universitat de València, C/Dr. Moliner, 50, E-46100, Burjassot, València Spain
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26
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Yan J, He G, Yan F, Zhang J, Zhang G. The dicarbonylation of indoles via Friedel–Crafts reaction with dicarbonyl nitrile generated in situ and retro-cyanohydrination. RSC Adv 2016. [DOI: 10.1039/c6ra04016k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The reaction of indole and β-carbonyl nitrile to generate dicarbonyl indoles has been developed. This process involves α-oxonation of the β-carbonyl nitrile, Friedel–Crafts reaction with indoles and retro-cyanohydrination form dicarbonyl indoles.
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Affiliation(s)
- Jianwei Yan
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Guangjie He
- Department of Forensic Medicine
- Xinxiang Medical University
- Xinxiang
- P. R. China
| | - Fulin Yan
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- P. R. China
| | - Jixia Zhang
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- P. R. China
| | - Guisheng Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
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27
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Aikawa K, Yoshida S, Kondo D, Asai Y, Mikami K. Catalytic Asymmetric Synthesis of Tertiary Alcohols and Oxetenes Bearing a Difluoromethyl Group. Org Lett 2015; 17:5108-11. [PMID: 26421643 DOI: 10.1021/acs.orglett.5b02617] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The catalytic asymmetric ene reaction with difluoropyruvate as an electrophile in the presence of a dicationic palladium complex is shown. This is the reliable and practical catalytic asymmetric synthesis for various α-CF2H tertiary alcohols in high yields and enantioselectivities. The reaction with isobutene can be catalyzed efficiently under solvent-free conditions with low catalyst loading (up to S/C 2000). Furthermore, difluoropyruvate is applicable to the [2 + 2] cycloaddition reaction in high yields and enantioselectivities.
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Affiliation(s)
- Kohsuke Aikawa
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Seiya Yoshida
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Daisuke Kondo
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Yuya Asai
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Koichi Mikami
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology , O-okayama, Meguro-ku, Tokyo 152-8552, Japan
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28
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Montesinos-Magraner M, Vila C, Blay G, Fernández I, Muñoz MC, Pedro JR. Organocatalytic Enantioselective Friedel-Crafts Alkylation of 1-Naphthol Derivatives and Activated Phenols with Ethyl Trifluoropyruvate. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500548] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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29
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Ren H, Wang P, Wang L, Tang Y. Catalytic Asymmetric Synthesis of 3-Hydroxy-3-trifluoromethyl Benzofuranones via Tandem Friedel–Crafts/Lactonization Reaction. Org Lett 2015; 17:4886-9. [DOI: 10.1021/acs.orglett.5b02440] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hai Ren
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China
| | - Pan Wang
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China
| | - Lijia Wang
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China
| | - Yong Tang
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China
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30
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Yin X, Guo Y, Liu C, Wang Z, Zhang B. One-pot two-step facile synthesis of 2,3,5,6-tetrafluorobenzonitrile-containing dithiocarbamic acid esters. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.07.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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31
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Yan J, Ni T, Yan F, Zhang J, Zhuang F. Friedel–Crafts reaction of indoles with vicinal tricarbonyl compounds generated in situ from 1,3-dicarbonyl compounds and TEMPO: highly selective synthesis of tertiary alcohols. RSC Adv 2015. [DOI: 10.1039/c5ra17383c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel Friedel–Crafts reaction of indoles with vicinal tricarbonyl compounds generated in situ has been developed, forming indolyl tertiary alcohols. The process involves disproportionation of TEMPO, α-oxyamination, N–O bond cleavage and, finally, addition of the indole.
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Affiliation(s)
- Jianwei Yan
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- P. R. China
| | - Tianjun Ni
- Department of Chemistry
- Xinxiang Medical University
- Xinxiang
- P. R. China
| | - Fulin Yan
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- P. R. China
| | - Jixia Zhang
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- P. R. China
| | - Fangfang Zhuang
- School of Pharmacy
- Xinxiang Medical University
- Xinxiang
- P. R. China
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32
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Loach R, Fenton OS, Amaike K, Siegel DS, Ozkal E, Movassaghi M. C7-derivatization of C3-alkylindoles including tryptophans and tryptamines. J Org Chem 2014; 79:11254-63. [PMID: 25343326 PMCID: PMC4241164 DOI: 10.1021/jo502062z] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2014] [Indexed: 02/07/2023]
Abstract
A versatile strategy for C7-selective boronation of tryptophans, tryptamines, and 3-alkylindoles by way of a single-pot C2/C7-diboronation-C2-protodeboronation sequence is described. The combination of a mild iridium-catalyzed C2/C7-diboronation followed by an in situ palladium-catalyzed C2-protodeboronation allows efficient entry to valuable C7-boroindoles that enable further C7-derivatization. The versatility of the chemistry is highlighted by the gram-scale synthesis of C7-boronated N-Boc-L-tryptophan methyl ester and the rapid synthesis of C7-halo, C7-hydroxy, and C7-aryl tryptophan derivatives.
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Affiliation(s)
- Richard
P. Loach
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue 18-292, Cambridge, Massachusetts 02139, United States
| | - Owen S. Fenton
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue 18-292, Cambridge, Massachusetts 02139, United States
| | - Kazuma Amaike
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue 18-292, Cambridge, Massachusetts 02139, United States
| | - Dustin S. Siegel
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue 18-292, Cambridge, Massachusetts 02139, United States
| | - Erhan Ozkal
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue 18-292, Cambridge, Massachusetts 02139, United States
| | - Mohammad Movassaghi
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue 18-292, Cambridge, Massachusetts 02139, United States
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33
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Aikawa K, Asai Y, Hioki Y, Mikami K. Catalytic and highly enantioselective Friedel–Crafts type reactions of heteroaromatic compounds with trifluoropyruvate and glyoxylate by a dicationic palladium complex. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.06.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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34
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Liang Q, He J, Ni B. Asymmetric domino Michael–Henry reaction of 1,2-diones with nitroolefins catalyzed by a chiral bisoxazolidine–Ni(acac)2 complex. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.tetasy.2014.06.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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35
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Carmona D, Lamata MP, Sánchez A, Viguri F, Rodríguez R, Oro LA, Liu C, Díez-González S, Maseras F. Chiral transition-metal complexes as Brønsted-acid catalysts for the asymmetric Friedel–Crafts hydroxyalkylation of indoles. Dalton Trans 2014; 43:11260-8. [DOI: 10.1039/c4dt00556b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Water is the catalyst! The transition metal complex “only” modulates its acidity and provides a chiral environment.
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Affiliation(s)
- Daniel Carmona
- Instituto de Síntesis Química y Catálisis Homogénea
- Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas
- 50009 Zaragoza, Spain
| | - M. Pilar Lamata
- Instituto de Síntesis Química y Catálisis Homogénea
- Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas
- 50009 Zaragoza, Spain
| | - Antonio Sánchez
- Instituto de Síntesis Química y Catálisis Homogénea
- Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas
- 50009 Zaragoza, Spain
| | - Fernando Viguri
- Instituto de Síntesis Química y Catálisis Homogénea
- Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas
- 50009 Zaragoza, Spain
| | - Ricardo Rodríguez
- Instituto de Síntesis Química y Catálisis Homogénea
- Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas
- 50009 Zaragoza, Spain
| | - Luis A. Oro
- Instituto de Síntesis Química y Catálisis Homogénea
- Universidad de Zaragoza-Consejo Superior de Investigaciones Científicas
- 50009 Zaragoza, Spain
| | - Chunhui Liu
- Institute of Chemical Research of Catalonia (ICIQ)
- 43007 Tarragona, Spain
| | - Silvia Díez-González
- Institute of Chemical Research of Catalonia (ICIQ)
- 43007 Tarragona, Spain
- Department of Chemistry
- Imperial College London
- London SW7 2Az, UK
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia (ICIQ)
- 43007 Tarragona, Spain
- Departament de Química
- Universitat Autònoma de Barcelona
- 08193 Bellaterra, Spain
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36
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Zhang P, Wolf C. Katalytische enantioselektive Difluoralkylierung von Aldehyden. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303551] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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37
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Zhang P, Wolf C. Catalytic Enantioselective Difluoroalkylation of Aldehydes. Angew Chem Int Ed Engl 2013; 52:7869-73. [DOI: 10.1002/anie.201303551] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Indexed: 11/09/2022]
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38
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Wang X, Buchwald SL. Synthesis of Optically Pure 2-Trifluoromethyl Lactic Acid by Asymmetric Hydroformylation. J Org Chem 2013; 78:3429-33. [DOI: 10.1021/jo400115r] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Xiao Wang
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139,
United States
| | - Stephen L. Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139,
United States
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39
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Enhanced efficiency of recyclable C3-symmetric cinchonine-squaramides in the asymmetric Friedel–Crafts reaction of indoles with alkyl trifluoropyruvate. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.08.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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40
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Wang H, Zhu TS, Xu MH. Rhodium-catalyzed enantioselective 1,2-addition of arylboronic acids to heteroaryl α-ketoesters for synthesis of heteroaromatic α-hydroxy esters. Org Biomol Chem 2012; 10:9158-64. [PMID: 23011218 DOI: 10.1039/c2ob26316e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of catalytic asymmetric 1,2-addition of arylboronic acids to heteroaryl α-ketoesters has been developed for the highly efficient and enantioselective synthesis of quaternary carbon-containing heteroaromatic α-hydroxy esters. The reaction works well with a variety of α-ketoesters including 3-indoleglyoxylates, 3-benzofuranglyoxylates and 3-benzothiopheneglyoxylates under very mild conditions, affording the corresponding products in moderate to good yields with high enantiomeric excesses (up to 97%).
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Affiliation(s)
- Hui Wang
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, People's Republic of China
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41
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Tsuno T, Kato D, Brunner H, Ike H. Synthesis and structural characterization of bis[(4S,5R)-4-methoxycarbonyl-5-methyl-1,3-oxazolidine]copper(II) dichloride and bis[(4S,5R)-4-methoxycarbonyl-5-methyl-2-oxazoline]-[(4S,5R)-4-methoxycarbonyl-5-methyl-1,3-oxazolidine]ruthenium(III) trichloride. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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42
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Xu H, Wolf C. Asymmetric synthesis of chiral 1,3-diaminopropanols: bisoxazolidine-catalyzed C-C bond formation with α-keto amides. Angew Chem Int Ed Engl 2011; 50:12249-52. [PMID: 22038682 DOI: 10.1002/anie.201105778] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 10/17/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Hanhui Xu
- Department of Chemistry, Georgetown University, 37th and O Streets, Washington, DC 20057, USA
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43
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Xu H, Wolf C. Asymmetric Synthesis of Chiral 1,3-Diaminopropanols: Bisoxazolidine-Catalyzed CC Bond Formation with α-Keto Amides. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201105778] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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Wolf C, Moskowitz M. Bisoxazolidine-Catalyzed Enantioselective Reformatsky Reaction. J Org Chem 2011; 76:6372-6. [DOI: 10.1021/jo200774e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christian Wolf
- Department of Chemistry, Georgetown University, Washington, D.C. 20057, United States
| | - Max Moskowitz
- Department of Chemistry, Georgetown University, Washington, D.C. 20057, United States
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45
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Wang W, Lian X, Chen D, Liu X, Lin L, Feng X. Highly enantioselective yttrium(iii)-catalyzed Friedel–Crafts alkylation of β-trichloro(trifluoro)methyl aryl enones with indoles. Chem Commun (Camb) 2011; 47:7821-3. [DOI: 10.1039/c1cc12306h] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Huang Y, Suzuki S, Liu G, Tokunaga E, Shiro M, Shibata N. Asymmetric synthesis of chiral trifluoromethylated heliotridane via highly catalytic asymmetric Friedel–Crafts alkylation with β-trifluoromethylated acrylates and pyrroles. NEW J CHEM 2011. [DOI: 10.1039/c1nj20550a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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