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1
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Pirovano V, Brambilla E, Moretti A, Rizzato S, Abbiati G, Nava D, Rossi E. Synthesis of Cyclohepta[ b]indoles by (4 + 3) Cycloaddition of 2-Vinylindoles or 4 H-Furo[3,2- b]indoles with Oxyallyl Cations. J Org Chem 2020; 85:3265-3276. [PMID: 31975604 PMCID: PMC7997566 DOI: 10.1021/acs.joc.9b03117] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
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The synthesis of cyclohepta[b]indole derivatives
through the dearomative (4 + 3) cycloaddition reaction of 2-vinylindoles
or 4H-furo[3,2-b]indoles with in
situ generated oxyallyl cations is reported. Oxyallyl cations are
generated from α-bromoketones in the presence of a base and
a perfluorinated solvent. Cyclohepta[b]indole scaffolds
are obtained under mild reaction conditions, in the absence of expensive
catalysts, starting from simple reagents, in good to excellent yields
and with complete diasteroselectivity. Preliminary expansion of the
scope to 3-vinylindoles and to aza-oxyallyl cations is reported.
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Affiliation(s)
- Valentina Pirovano
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Elisa Brambilla
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Andrea Moretti
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Silvia Rizzato
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Giorgio Abbiati
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Donatella Nava
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
| | - Elisabetta Rossi
- Dipartimento di Scienze Farmaceutiche-Sezione di Chimica Generale e Organica "A. Marchesini", Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
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2
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Gao S, Wang M, Chen M. Syntheses of Unsymmetrical 1,4-Bifunctional Allylboron Reagents via Cu-catalyzed Highly Regio- and Stereoselective 1,4-Protoboration of Dienylboronates and Analysis of the Origin of Chemoselective Aldehyde syn-(Hydroxymethyl)allylation. Org Lett 2018; 20:7921-7925. [DOI: 10.1021/acs.orglett.8b03483] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Shang Gao
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Mengzhou Wang
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Ming Chen
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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3
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Merkushev AA, Strel'nikov VN, Uchuskin MG, Trushkov IV. A simple synthesis of benzofurans by acid-catalyzed domino reaction of salicyl alcohols with N -tosylfurfurylamine. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.09.043] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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4
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Candeias NR, Paterna R, Gois PMP. Homologation Reaction of Ketones with Diazo Compounds. Chem Rev 2016; 116:2937-81. [DOI: 10.1021/acs.chemrev.5b00381] [Citation(s) in RCA: 201] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Nuno R. Candeias
- Department
of Chemistry and Bioengineering, Tampere University of Technology, Korkeakoulunkatu 8, Tampere, FI-33101 Finland
| | - Roberta Paterna
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidad of Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Pedro M. P. Gois
- Research
Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidad of Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
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5
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Luo J, Jiang Q, Chen H, Tang Q. Catalyst-free formation of 1,4-diketones by addition of silyl enolates to oxyallyl zwitterions in situ generated from α-haloketones. RSC Adv 2015. [DOI: 10.1039/c5ra12244a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Here we report an efficient and practical method for the preparation of 1,4-diketones by direct coupling of α-haloketones with silyl enolates at room temperature. No catalysts were required in our protocol.
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Affiliation(s)
- Juan Luo
- Department of Medical Chemistry
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016
- P. R. China
| | - Qihua Jiang
- Department of Medical Chemistry
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016
- P. R. China
| | - Hao Chen
- Department of Medical Chemistry
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016
- P. R. China
| | - Qiang Tang
- Department of Medical Chemistry
- College of Pharmacy
- Chongqing Medical University
- Chongqing 400016
- P. R. China
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6
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Shenje R, Williams CW, Francois KM, France S. Catalysis and Chemodivergence in the Interrupted, Formal Homo-Nazarov Cyclization Using Allylsilanes. Org Lett 2014; 16:6468-71. [DOI: 10.1021/ol503305r] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Raynold Shenje
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Corey W. Williams
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Katherine M. Francois
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Stefan France
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Petit
Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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7
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Wu YK, Dunbar CR, McDonald R, Ferguson MJ, West FG. Experimental and Computational Studies on Interrupted Nazarov Reactions: Exploration of Umpolung Reactivity at the α-Carbon of Cyclopentanones. J Am Chem Soc 2014; 136:14903-11. [DOI: 10.1021/ja507638r] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Yen-Ku Wu
- X-ray Crystallography Lab, †Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Center, Edmonton, Alberta T6G 2G2, Canada
| | - Christine R. Dunbar
- X-ray Crystallography Lab, †Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Center, Edmonton, Alberta T6G 2G2, Canada
| | - Robert McDonald
- X-ray Crystallography Lab, †Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Center, Edmonton, Alberta T6G 2G2, Canada
| | - Michael J. Ferguson
- X-ray Crystallography Lab, †Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Center, Edmonton, Alberta T6G 2G2, Canada
| | - F. G. West
- X-ray Crystallography Lab, †Department of Chemistry, University of Alberta, E3-43 Gunning-Lemieux Chemistry Center, Edmonton, Alberta T6G 2G2, Canada
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8
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Lejkowski M, Banerjee P, Raabe G, Runsink J, Gais HJ. Spiro- and Bicycloannulation of Sulfoximine-Substituted 2-Hydroxy-dihydropyrans: Enantioselective Synthesis of Spiroketals, Spiroethers, and Oxabicycles and Structure of Dihydropyran Oxocarbenium Ions. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301461] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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