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Annese C, D'Accolti L, Fusco C, Licini G, Zonta C. Heterolytic (2 e) vs Homolytic (1 e) Oxidation Reactivity: N-H versus C-H Switch in the Oxidation of Lactams by Dioxirans. Chemistry 2016; 23:259-262. [PMID: 27779338 DOI: 10.1002/chem.201604507] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Indexed: 11/05/2022]
Abstract
Dioxiranes are powerful oxidants that can act via two different mechanisms: 1) homolytic (H abstraction and oxygen rebound) and 2) heterolytic (electrophilic oxidation). So far, it has been reported that the nature of the substrate dictates the reaction mode independently from the dioxirane employed. Herein, we report an unprecedented case in which the nature of the dioxirane rules the oxidation chemoselectivity. In particular, a switch from C-H to N-H oxidation is observed in the oxidation of lactams moving from dimethyl dioxirane (DDO) to methyl(trifluoromethyl)dioxirane (TFDO). A physical organic chemistry study, which combines the oxidation with two other dioxiranes methyl(fluoromethyl)dioxirane, MFDO, and methyl(difluoromethyl)dioxirane, DFDO, with computational studies, points to a diverse ability of the dioxiranes to either stabilize the homo or the heterolytic pathway.
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Affiliation(s)
- Cosimo Annese
- CNR-ICCOM, UOS Bari, Via Orabona 4, 70126, Bari, Italy
| | - Lucia D'Accolti
- CNR-ICCOM, UOS Bari, Via Orabona 4, 70126, Bari, Italy.,Dipartimento di Chimica, Università di Bari "A. Moro", Via Orabona 4, 70126, Bari, Italy
| | | | - Giulia Licini
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
| | - Cristiano Zonta
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131, Padova, Italy
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Hussain H, Green IR, Ahmed I. Journey describing applications of oxone in synthetic chemistry. Chem Rev 2013; 113:3329-71. [PMID: 23451713 DOI: 10.1021/cr3004373] [Citation(s) in RCA: 186] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Hidayat Hussain
- Department of Chemistry, University of Paderborn, Warburger Strasse 100, 33098 Paderborn, Germany.
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Astolfi P, Stipa P. Synthesis and Thermal Stability of Benzoxazine Nitroxides. J Org Chem 2011; 76:9253-60. [DOI: 10.1021/jo2014559] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Paola Astolfi
- S.I.M.A.U. Department - Chemistry Division, Università Politecnica delle Marche, via Brecce Bianche, I-60131 Ancona, Italy
| | - Pierluigi Stipa
- S.I.M.A.U. Department - Chemistry Division, Università Politecnica delle Marche, via Brecce Bianche, I-60131 Ancona, Italy
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Annese C, D'Accolti L, Dinoi A, Fusco C, Gandolfi R, Curci R. Concerning the Reactivity of Dioxiranes. Observations from Experiments and Theory. J Am Chem Soc 2008; 130:1197-204. [DOI: 10.1021/ja075068u] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cosimo Annese
- Dipartimento Chimica, Università di Bari, CNR.-ICCOM, v. Amendola 173, I-70126 Bari, Italy, and Dipartimento di Chimica Organica, Università di Pavia, v.le Taramelli 10, 27100 Pavia, Italy
| | - Lucia D'Accolti
- Dipartimento Chimica, Università di Bari, CNR.-ICCOM, v. Amendola 173, I-70126 Bari, Italy, and Dipartimento di Chimica Organica, Università di Pavia, v.le Taramelli 10, 27100 Pavia, Italy
| | - Anna Dinoi
- Dipartimento Chimica, Università di Bari, CNR.-ICCOM, v. Amendola 173, I-70126 Bari, Italy, and Dipartimento di Chimica Organica, Università di Pavia, v.le Taramelli 10, 27100 Pavia, Italy
| | - Caterina Fusco
- Dipartimento Chimica, Università di Bari, CNR.-ICCOM, v. Amendola 173, I-70126 Bari, Italy, and Dipartimento di Chimica Organica, Università di Pavia, v.le Taramelli 10, 27100 Pavia, Italy
| | - Remo Gandolfi
- Dipartimento Chimica, Università di Bari, CNR.-ICCOM, v. Amendola 173, I-70126 Bari, Italy, and Dipartimento di Chimica Organica, Università di Pavia, v.le Taramelli 10, 27100 Pavia, Italy
| | - Ruggero Curci
- Dipartimento Chimica, Università di Bari, CNR.-ICCOM, v. Amendola 173, I-70126 Bari, Italy, and Dipartimento di Chimica Organica, Università di Pavia, v.le Taramelli 10, 27100 Pavia, Italy
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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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Liu J, Houk KN, Dinoi A, Fusco C, Curci R. Dioxirane Epoxidations of 1,1-Disubstituted Ethylenes. Probing for Radical Pathways by Computations and Experiments. J Org Chem 1998. [DOI: 10.1021/jo981050d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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