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Ikeda Y, Mandai T, Yonekura K, Shirakawa E. Alkylation of Heteroaryl Chlorides through Homolytic Aromatic Substitution by Alkyl Radicals Derived from Alkyl Formates. CHEM LETT 2021. [DOI: 10.1246/cl.210015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuko Ikeda
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Tomoya Mandai
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Kyohei Yonekura
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Eiji Shirakawa
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
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Tang RJ, Kang L, Yang L. Metal-Free Oxidative Decarbonylative Coupling of Aliphatic Aldehydes with Azaarenes: Successful Minisci-Type Alkylation of Various Heterocycles. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500268] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Motiwala HF, Gülgeze B, Aubé J. Copper-catalyzed oxaziridine-mediated oxidation of C-H bonds. J Org Chem 2012; 77:7005-22. [PMID: 22830300 DOI: 10.1021/jo3012336] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The highly regio- and chemoselective oxidation of activated C-H bonds has been observed via copper-catalyzed reactions of oxaziridines. The oxidation proceeded with a variety of substrates, primarily comprising allylic and benzylic examples, as well as one example of an otherwise unactivated tertiary C-H bond. The mechanism of the reaction is proposed to involve single-electron transfer to the oxaziridines to generate a copper-bound radical anion, followed by hydrogen atom abstraction and collapse to products, with regeneration of the catalyst by a final single-electron transfer event. The involvement of allylic radical intermediates was supported by a radical-trapping experiment with TEMPO.
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Affiliation(s)
- Hashim F Motiwala
- Department of Medicinal Chemistry, University of Kansas, Del Shankel Structural Biology Center, 2121 Simons Drive, West Campus, Lawrence, Kansas 66047, United States
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Caronna T, Gambarotti C, Palmisano L, Punta C, Pierini M, Recupero F. Sunlight-induced functionalisation reactions of heteroaromatic bases with aldehydes in the presence of TiO2: A hypothesis on the mechanism. J Photochem Photobiol A Chem 2007. [DOI: 10.1016/j.jphotochem.2007.02.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Grabovskiy SA, Timerghazin QK, Kabal’nova NN. Oxidation of ethers with dimethyldioxirane. Russ Chem Bull 2005. [DOI: 10.1007/s11172-006-0127-0] [Citation(s) in RCA: 6] [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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Camaioni DM, Bays JT, Shaw WJ, Linehan JC, Birnbaum JC. Radical and non-radical mechanisms for alkane oxidations by hydrogen peroxide-trifluoroacetic acid. J Org Chem 2001; 66:789-95. [PMID: 11430097 DOI: 10.1021/jo005617d] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The oxidation of cyclohexane by the H2O2-trifluoroacetic acid system is revisited. Consistent with a previous report (Deno, N.; Messer, L. A. Chem. Comm. 1976, 1051), cyclohexanol forms initially but then esterifies to cyclohexyl trifluoroacetate. Small amounts of trans-1,2-cyclohexadiyl bis-(trifluoroacetate) also form. Although these products form irrespective of the presence or absence of O2, dual mechanisms are shown to operate. In the absence of O2, the dominant mechanism is a radical chain reaction that is propagated by CF3. abstracting H from C6H12 and SH2 displacement of C6H11. on CF3CO2OH. The intermediacy of C6H11. and CF3. is inferred from production of CHF3 and CO2 along with cyclohexyl trifluoroacetate, or CDF3 when cyclohexane-d12 is used. In the presence of O2, fluoroform and CO2 are suppressed, the reaction rate slows, and the rate law approaches second order (first order in peracid and in C6H12). Trapping of cyclohexyl radicals by quinoxaline is inefficient except at elevated (approximately 75 degrees C) temperatures. Fluoroform and CO2, telltale evidence for the chain pathway, were not produced when quinoxaline was present in room temperature reactions. These observations suggest that a parallel, nonfree radical, oxenoid insertion mechanism dominates when O2 is present. A pathway is discussed in which a biradicaloid-zwiterionic transition state is attained by hydrogen transfer from alkane to peroxide oxygen with synchronous O-O bond scission.
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Affiliation(s)
- D M Camaioni
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, USA.
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The kinetic regularities, products, and mechanism of the thermal decomposition of dimethyldioxirane. The contribution of molecular and radical reaction channels. Russ Chem Bull 2000. [DOI: 10.1007/bf02495074] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Affiliation(s)
- Xiaohui Du
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569
| | - K. N. Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095-1569
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The ratio of the rate constants for H atom abstraction and β-cleavage for bis-oxyisopropylidene biradical. Russ Chem Bull 1998. [DOI: 10.1007/bf02495548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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de MacedoPuyau P, Perie JJ. Selective Epoxidation of Polar Substrates by Dimethyldioxirane. SYNTHETIC COMMUN 1998. [DOI: 10.1080/00397919808004837] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bravo A, Fontana F, Fronza G, Minisci F, Zhao L. Molecule-Induced Homolysis versus “Concerted Oxenoid Oxygen Insertion” in the Oxidation of Organic Compounds by Dimethyldioxirane. J Org Chem 1998. [DOI: 10.1021/jo971226w] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anna Bravo
- Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - Francesca Fontana
- Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - Giovanni Fronza
- Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - Francesco Minisci
- Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - Lihua Zhao
- Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
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Affiliation(s)
- Alexander E. Shilov
- N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 117977 Moscow, Russia
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Bravo A, Bjorsvik HR, Fontana F, Minisci F, Serri A. Radical versus “Oxenoid” Oxygen Insertion Mechanism in the Oxidation of Alkanes and Alcohols by Aromatic Peracids. New Synthetic Developments. J Org Chem 1996. [DOI: 10.1021/jo961366q] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anna Bravo
- Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - Hans-René Bjorsvik
- Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - Francesca Fontana
- Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - Francesco Minisci
- Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
| | - Anna Serri
- Dipartimento di Chimica del Politecnico, via Mancinelli 7, I-20131 Milano, Italy
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Angelis Y, Zhang X, Orfanopoulos M. Secondary isotope effects in dioxirane epoxidations. Concerted or step-wise mechanism? Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(96)01256-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Petrov VA, Resnati G. Polyfluorinated Oxaziridines: Synthesis and Reactivity. Chem Rev 1996; 96:1809-1824. [PMID: 11848812 DOI: 10.1021/cr941146h] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Viacheslav A. Petrov
- DuPont Central Research and Development, P.O. Box 80328, Wilmington, Delaware 19880-0328, and C.N.R.-Centro Studio Sostanze Organiche Naturali, Dipartimento Chimica, Politecnico, 7, via Mancinelli, I-20131 Milano, Italy
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Adam W, Smerz AK. Solvent effects in the dimethyldioxirane oxidation of allylic alcohols: evidence for hydrogen bonding in the dipolar transition state of oxygen transfer. Tetrahedron 1995. [DOI: 10.1016/0040-4020(95)00921-t] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Vanni R, Garden SJ, Banks JT, Ingold KU. Mechanism of hydroxylation of alkanes by dimethyldioxirane. A radical-clock study. Tetrahedron Lett 1995. [DOI: 10.1016/0040-4039(95)01666-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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