1
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Xiong B, Si L, Liu Y, Xu W, Jiang T, Cao F, Tang KW, Wong WY. Metal-free, Phosphoric Acid-catalyzed Regioselective 1,6-Hydroarylation of para-Quinone Methides with Indoles in Water. Chem Asian J 2022; 17:e202200042. [PMID: 35246930 DOI: 10.1002/asia.202200042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 02/19/2022] [Indexed: 11/08/2022]
Abstract
An efficient, cheap and green protocol for the highly regioselective 1,6-hydroarylation of para -quinone methides ( p -QMs) with indoles at the C-3 position has been established by phosphoric acid catalysis in water under the transition-metal-free reaction conditions. A wide range of indole derivatives and para -quinone methides ( p -QMs) are compatible for the reaction, affording the corresponding 1,6-hydroarylation products with good to excellent yields. The possible mechanism of the reaction has been explored by step-by-step control experiments. The protocol is convenient for practical application, leading a safe, green and feasible way for the formation of C-3 diarylmethyl functionalized indole derivatives.
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Affiliation(s)
- Biquan Xiong
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Lulu Si
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Yu Liu
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Weifeng Xu
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Tao Jiang
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Fan Cao
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Ke-Wen Tang
- Hunan Institute of Science and Technology, Department of Chemistry and Chemical Engineering, Xueyuan Road, 414006, Yueyang, CHINA
| | - Wai-Yeung Wong
- The Hong Kong Polytechnic University, Department of Applied Biology and Chemical Technology, Hung Hom, Hong Kong, HONG KONG
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2
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Chowdhury R, Mendoza A. N-Hydroxyphthalimidyl diazoacetate (NHPI-DA): a modular methylene linchpin for the C-H alkylation of indoles. Chem Commun (Camb) 2021; 57:4532-4535. [PMID: 33956022 PMCID: PMC8101283 DOI: 10.1039/d1cc01026c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 03/29/2021] [Indexed: 12/18/2022]
Abstract
Despite the extensive studies on the reactions between conventional diazocompounds and indoles, these are still limited by the independent synthesis of the carbene precursors, the specific catalysts, and the required multi-step manipulation of the products. In this work, we explore redox-active carbenes in the expedited and divergent synthesis of functionalized indoles. NHPI-DA displays unusual efficiency and selectivity to yield insertion products that can be swiftly elaborated into boron and carbon substituents that are particularly problematic in carbene-mediated reactions.
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Affiliation(s)
- Rajdip Chowdhury
- Department of Organic Chemistry, Arrhenius laboratory, Stockholm University, 106 91 Stockholm, Sweden.
| | - Abraham Mendoza
- Department of Organic Chemistry, Arrhenius laboratory, Stockholm University, 106 91 Stockholm, Sweden.
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3
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Wang Y, Cao X, Ji J, Cui X, Pi C, Zhao L, Wu Y. Water and fluorinated alcohol mediated/promoted tandem insertion/aerobic oxidation/bisindolylation under metal-free conditions: Easy access to bis(indolyl)methanes. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.12.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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4
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Baruah B, Deb ML. Catalyst-free and additive-free reactions enabling C-C bond formation: a journey towards a sustainable future. Org Biomol Chem 2021; 19:1191-1229. [PMID: 33480947 DOI: 10.1039/d0ob02149k] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review focuses on the catalyst- and additive-free C-C bond forming reactions reported mostly from the year 2005 to date. C-C bond forming reactions are highly important as large and complex organic molecules can be derived from simpler ones via these reactions. On the other hand, catalyst- and additive-free reactions are economical, environmentally friendly and less sensitive to air/moisture, allow easy separation of products and are operationally simple. Hence, a large number of research articles have been published in this area. Though a few reviews are available on the catalyst-free organic reactions, most of them were published a few years ago. The current review excludes catalysts as well as additives and is specific to only C-C bond formation. Besides many organic name reactions, catalyst/additive-free C-H functionalizations, coupling reactions and UV-visible-light-promoted reactions are also discussed. Undoubtedly, the contents of this review will motivate readers to do more novel work in this area which will accelerate the journey towards a sustainable future.
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Affiliation(s)
- Biswajita Baruah
- Department of Chemistry, Pandu College, Guwahati-12, Assam, India
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5
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Morgen M, Steimbach RR, Géraldy M, Hellweg L, Sehr P, Ridinger J, Witt O, Oehme I, Herbst‐Gervasoni CJ, Osko JD, Porter NJ, Christianson DW, Gunkel N, Miller AK. Design and Synthesis of Dihydroxamic Acids as HDAC6/8/10 Inhibitors. ChemMedChem 2020; 15:1163-1174. [PMID: 32348628 PMCID: PMC7335359 DOI: 10.1002/cmdc.202000149] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/23/2020] [Indexed: 12/22/2022]
Abstract
We report the synthesis and evaluation of a class of selective multitarget agents for the inhibition of HDAC6, HDAC8, and HDAC10. The concept for this study grew out of a structural analysis of the two selective inhibitors Tubastatin A (HDAC6/10) and PCI-34051 (HDAC8), which we recognized share the same N-benzylindole core. Hybridization of the two inhibitor structures resulted in dihydroxamic acids with benzyl-indole and -indazole core motifs. These substances exhibit potent activity against HDAC6, HDAC8, and HDAC10, while retaining selectivity over HDAC1, HDAC2, and HDAC3. The best substance inhibited the viability of the SK-N-BE(2)C neuroblastoma cell line with an IC50 value similar to a combination treatment with Tubastatin A and PCI-34051. This compound class establishes a proof of concept for such hybrid molecules and could serve as a starting point for the further development of enhanced HDAC6/8/10 inhibitors.
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Affiliation(s)
- Michael Morgen
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
| | - Raphael R. Steimbach
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
- Faculty of BiosciencesUniversity of Heidelberg69120HeidelbergGermany
| | - Magalie Géraldy
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
| | - Lars Hellweg
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
| | - Peter Sehr
- Chemical Biology Core FacilityEuropean Molecular Biology Laboratory (EMBL)69117HeidelbergGermany
| | - Johannes Ridinger
- Hopp Children's Cancer Center Heidelberg (KiTZ)69120HeidelbergGermany
- Clinical Cooperation Unit Pediatric OncologyGerman Cancer Research Center (DKFZ)69120HeidelbergGermany
- Department of Pediatric OncologyHematology and ImmunologyUniversity Hospital Heidelberg69120HeidelbergGermany
| | - Olaf Witt
- Hopp Children's Cancer Center Heidelberg (KiTZ)69120HeidelbergGermany
- Clinical Cooperation Unit Pediatric OncologyGerman Cancer Research Center (DKFZ)69120HeidelbergGermany
- Department of Pediatric OncologyHematology and ImmunologyUniversity Hospital Heidelberg69120HeidelbergGermany
- German Cancer Consortium (DKTK)69120HeidelbergGermany
| | - Ina Oehme
- Hopp Children's Cancer Center Heidelberg (KiTZ)69120HeidelbergGermany
- Clinical Cooperation Unit Pediatric OncologyGerman Cancer Research Center (DKFZ)69120HeidelbergGermany
- Department of Pediatric OncologyHematology and ImmunologyUniversity Hospital Heidelberg69120HeidelbergGermany
| | - Corey J. Herbst‐Gervasoni
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of PennsylvaniaPhiladelphiaPA 19104-6323USA
| | - Jeremy D. Osko
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of PennsylvaniaPhiladelphiaPA 19104-6323USA
| | - Nicholas J. Porter
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of PennsylvaniaPhiladelphiaPA 19104-6323USA
| | - David W. Christianson
- Roy and Diana Vagelos LaboratoriesDepartment of ChemistryUniversity of PennsylvaniaPhiladelphiaPA 19104-6323USA
| | - Nikolas Gunkel
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
- German Cancer Consortium (DKTK)69120HeidelbergGermany
| | - Aubry K. Miller
- Cancer Drug Development GroupGerman Cancer Research Center (DKFZ)Im Neuenheimer Feld 28069120HeidelbergGermany
- German Cancer Consortium (DKTK)69120HeidelbergGermany
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6
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Ferric Chloride Catalyzed 1,3-Rearrangement of (Phenoxymethyl)heteroarenes to (Heteroarylmethyl)phenols. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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7
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Swinson H, Perry A. Three-component spiropyran synthesis via tandem alkylation-condensation. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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8
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Chanda R, Chakraborty B, Rana G, Jana U. Iron-Catalyzed Functionalization of 3-Benzylideneindoline Through Tandem Csp2
-Csp3
Bond Formation/Isomerization with π-Activated Alcohols. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901181] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rupsa Chanda
- Department of Chemistry; Jadavpur University; 700032 Kolkata West Bengal India
| | - Baitan Chakraborty
- Department of Chemistry; Jadavpur University; 700032 Kolkata West Bengal India
| | - Gopal Rana
- Department of Chemistry; Jadavpur University; 700032 Kolkata West Bengal India
| | - Umasish Jana
- Department of Chemistry; Jadavpur University; 700032 Kolkata West Bengal India
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9
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Cheng X, Shan J, Tian X, Ren YL, Zhu Y. Benzylation of Arenes with Benzyl Halides under Promoter-Free and Additive-Free Conditions. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900590] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Xinqiang Cheng
- School of Chemical Engineering & Pharmaceutics; Henan University of Science and Technology; Luoyang 471003 Henan P. R. China
| | - Jiankai Shan
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 Henan Province P.R. China
| | - Xinshe Tian
- School of Chemical Engineering & Pharmaceutics; Henan University of Science and Technology; Luoyang 471003 Henan P. R. China
| | - Yun-Lai Ren
- School of Chemical Engineering & Pharmaceutics; Henan University of Science and Technology; Luoyang 471003 Henan P. R. China
| | - Yanyan Zhu
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 Henan Province P.R. China
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10
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Perry A, Davis K, West L. Synthesis of stereochemically-biased spiropyrans by microwave-promoted, one-pot alkylation-condensation. Org Biomol Chem 2018; 16:7245-7254. [PMID: 30259039 DOI: 10.1039/c8ob01996g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A microwave-assisted, two-step, one-pot synthesis of spiropyrans has been developed. This process was used to synthesise a range of sterically-congested spiropyrans from readily available precursors, employing environmentally benign solvents. The unusual substituent pattern possessed by these structures has been shown to influence the stereoselectivity of spiropyran ring-closure.
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Affiliation(s)
- Alexis Perry
- Biosciences, University of Exeter, Stocker Road, Exeter EX4 4QD, UK.
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11
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La Manna P, De Rosa M, Talotta C, Gaeta C, Soriente A, Floresta G, Rescifina A, Neri P. The hexameric resorcinarene capsule as an artificial enzyme: ruling the regio and stereochemistry of a 1,3-dipolar cycloaddition between nitrones and unsaturated aldehydes. Org Chem Front 2018. [DOI: 10.1039/c7qo00942a] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hexameric resorcinarene capsule as an artificial enzyme to rule the regio and stereochemistry of a 1,3-dipolar cycloaddition.
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Affiliation(s)
- Pellegrino La Manna
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Margherita De Rosa
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Carmen Talotta
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Carmine Gaeta
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Annunziata Soriente
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Giuseppe Floresta
- Dipartimento di Scienze del Farmaco
- Università di Catania
- Catania
- Italy
- Dipartimento di Scienze Chimiche
| | - Antonio Rescifina
- Dipartimento di Scienze del Farmaco
- Università di Catania
- Catania
- Italy
| | - Placido Neri
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
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12
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Di Gregorio G, Mari M, Bartoccini F, Piersanti G. Iron-Catalyzed Direct C3-Benzylation of Indoles with Benzyl Alcohols through Borrowing Hydrogen. J Org Chem 2017; 82:8769-8775. [DOI: 10.1021/acs.joc.7b01603] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giovanni Di Gregorio
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
| | - Michele Mari
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
| | - Francesca Bartoccini
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
| | - Giovanni Piersanti
- Department of Biomolecular
Sciences, University of Urbino “Carlo Bo”, P.zza Rinascimento
6, 61029 Urbino, Pesaro and Urbino (PU), Italy
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13
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Kulkarni PM, Ranade A, Garai S, Thakur GA. Microwave‐accelerated Conjugate Addition of 2‐Arylindoles to Substituted β‐Nitrostyrenes in the Presence of Ammonium Trifluoroacetate: An Efficient Approach for the Synthesis of a Novel Class of CB1 Cannabinoid Receptor Allosteric Modulators. J Heterocycl Chem 2017. [DOI: 10.1002/jhet.2861] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Pushkar M. Kulkarni
- Department of Pharmaceutical Sciences, School of Pharmacy, Bouvé College of Health SciencesNortheastern University Boston MA 02115 USA
| | - Ameya Ranade
- Department of Pharmaceutical Sciences, School of Pharmacy, Bouvé College of Health SciencesNortheastern University Boston MA 02115 USA
| | - Sumanta Garai
- Department of Pharmaceutical Sciences, School of Pharmacy, Bouvé College of Health SciencesNortheastern University Boston MA 02115 USA
| | - Ganesh A. Thakur
- Department of Pharmaceutical Sciences, School of Pharmacy, Bouvé College of Health SciencesNortheastern University Boston MA 02115 USA
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14
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De Rosa M, La Manna P, Soriente A, Gaeta C, Talotta C, Hickey N, Geremia S, Neri P. Supramolecular synthons in the gamma-hydroxybutenolides. CrystEngComm 2017. [DOI: 10.1039/c7ce00953d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The supramolecular organization in the solid state of five novel gamma-hydroxybutenolides is described.
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Affiliation(s)
- Margherita De Rosa
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Pellegrino La Manna
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Annunziata Soriente
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Carmine Gaeta
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Carmen Talotta
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
| | - Neal Hickey
- Centro di Eccellenza in Biocristallografia
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- I-34127 Trieste
- Italy
| | - Silvano Geremia
- Centro di Eccellenza in Biocristallografia
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Trieste
- I-34127 Trieste
- Italy
| | - Placido Neri
- Dipartimento di Chimica e Biologia “A. Zambelli”
- Università di Salerno
- I-84084 Fisciano
- Italy
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15
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Kumar N, Kaur J, Kumar A, Islam N, Chimni SS. Catalyst-Free Synthesis of 3-Aryl-3-hydroxy-2-oxindole Derivatives by Using Water as the Solvent: Experimental and DFT Studies. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600346] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Naveen Kumar
- Department of Chemistry; U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University; Amritsar 143005 India
| | - Jasneet Kaur
- Department of Chemistry; U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University; Amritsar 143005 India
| | - Akshay Kumar
- Department of Chemistry; DAV University; Jalandhar, Punjab 144012 India
| | - Nasarul Islam
- Department of Chemistry; U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University; Amritsar 143005 India
| | - Swapandeep Singh Chimni
- Department of Chemistry; U.G.C. Centre of Advance Studies in Chemistry; Guru Nanak Dev University; Amritsar 143005 India
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16
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Zhu YF, Lu GP, Cai C. A Highly Regioselective C-3 Benzylation Reaction of Indoles with Alcohols Catalysed by an N-Heterocyclic Carbene. JOURNAL OF CHEMICAL RESEARCH 2015. [DOI: 10.3184/174751915x14376593652711] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The direct C-3 alkylation of indoles with primary and secondary alcohols through the combination of KOH and an N-heterocyclic carbene is described. The KOH/NHC-catalysed system can give desired C-3 alkylated indoles with high selectivity in moderate to excellent yields. Moreover, this process has obvious advantages such as high atom economy and the absence of a metal source.
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Affiliation(s)
- Yan-fang Zhu
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, P.R. China
| | - Guo-ping Lu
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, P.R. China
| | - Chun Cai
- School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, P.R. China
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17
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Commercially available simple ionic liquids-promoted dehydrative carbon–carbon bond-forming reaction of diarylmethanols and triarylmethanols with pyrroles, thiophene, furan and indoles. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.10.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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Laha JK, Dayal N, Singh S, Bhimpuria R. Dual Catalysis in DominoN-Benzylation/Intramolecular C-H Arylation: Regio- and Chemoselective Synthesis of Annelated Nitrogen Heterocycles. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402395] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Putra AE, Takigawa K, Tanaka H, Ito Y, Oe Y, Ohta T. Transition-Metal-Catalyzed Regioselective Alkylation of Indoles with Alcohols. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300744] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Wu L, Jiang R, Yang JM, Wang SY, Ji SJ. In(OTf)3 catalyzed C3-benzylation of indoles with benzyl alcohols in water. RSC Adv 2013. [DOI: 10.1039/c3ra40251g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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21
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Gawande MB, Bonifácio VDB, Luque R, Branco PS, Varma RS. Benign by design: catalyst-free in-water, on-water green chemical methodologies in organic synthesis. Chem Soc Rev 2013; 42:5522-51. [DOI: 10.1039/c3cs60025d] [Citation(s) in RCA: 501] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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22
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Chu XQ, Wang SY, Ji SJ. Recyclable NaHSO4 catalyzed alkylation of tert-enamides with indoles or amines in water: facile construction of pharmaceutically analogous bis-alkaloid scaffolds. RSC Adv 2013. [DOI: 10.1039/c3ra40833g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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23
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Loh CCJ, Raabe G, Enders D. Enantioselective Synthesis of Tetrahydrocarbazoles through a Michael Addition/Ciamician-Plancher Rearrangement Sequence: Asymmetric Synthesis of a Potent Constrained Analogue of MS-245. Chemistry 2012; 18:13250-4. [DOI: 10.1002/chem.201202908] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Indexed: 11/12/2022]
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24
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De Rosa M, Soriente A. Water opportunities: catalyst and solvent in Mukaiyama aldol addition of Rawal’s diene to carbonyl derivatives. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.06.035] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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