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Dong J, Xu J. Synthesis of 2,3-dihydro-1,4-benzoxathiine derivatives. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-022-03084-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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2
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Zuo H, Zhong F. Reactivity Modulation of Labile Quinones and Biomimetic Catalytic Transformations. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202108032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Geng Y, Gao X, Liang A, Li J, Zou D, Wu Y, Wu Y. [4+2] Cycloaddition Reactions of β-Naphtha-1-thioquinones Generated from 2-Naphthols and DAST. Org Biomol Chem 2022; 20:6750-6754. [DOI: 10.1039/d2ob01044e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An original and facile method for the generation of β-naphtha-1-thioquinone using DAST and 2-naphthol has been developed. A series of dehydro-2-naphthol-1-sluphides or naphtha-oxathiane derivatives were synthesized by in-situ Diels-Alder cycloaddition...
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Viglianisi C, Vasa K, Tanini D, Capperucci A, Amorati R, Valgimigli L, Baschieri A, Menichetti S. Ditocopheryl Sulfides and Disulfides: Synthesis and Antioxidant Profile. Chemistry 2019; 25:9108-9116. [PMID: 31017702 DOI: 10.1002/chem.201901537] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Indexed: 12/14/2022]
Abstract
Symmetrical ditocopheryl disulfides (Toc)2 S2 and symmetrical and unsymmetrical ditocopheryl sulfides (Toc)2 S were simply prepared under remarkably mild conditions with complete control of the regiochemistry by using δ-, γ-, and β-tocopheryl-N-thiophthalimides (Toc-NSPht) as common starting materials. The roles of sulfur atom(s), H-bond and aryl ring substitution pattern on the antioxidant profile of these new compounds, which were assembled by linking together two tocopheryl units, are also discussed.
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Affiliation(s)
- Caterina Viglianisi
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, Sesto Fiorentino, Firenze, Italy
| | - Kristian Vasa
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, Sesto Fiorentino, Firenze, Italy
| | - Damiano Tanini
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, Sesto Fiorentino, Firenze, Italy
| | - Antonella Capperucci
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, Sesto Fiorentino, Firenze, Italy
| | - Riccardo Amorati
- Department of Chemistry "G. Ciamician", University of Bologna, Via S. Giacomo 11, 40126, Bologna, Italy
| | - Luca Valgimigli
- Department of Chemistry "G. Ciamician", University of Bologna, Via S. Giacomo 11, 40126, Bologna, Italy
| | - Andrea Baschieri
- Department of Chemistry "G. Ciamician", University of Bologna, Via S. Giacomo 11, 40126, Bologna, Italy
| | - Stefano Menichetti
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, Sesto Fiorentino, Firenze, Italy
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Viglianisi C, Menichetti S, Piantini S, Tofani L. Helical-Shaped Bis-1,4-benzoxathiines through an Inverse-Electron-Demand Hetero-Diels-Alder Reaction ofortho-Thioquinones. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600850] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Caterina Viglianisi
- Department of Chemistry “U. Schiff”; University of Florence; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
| | - Stefano Menichetti
- Department of Chemistry “U. Schiff”; University of Florence; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
| | - Sara Piantini
- Department of Chemistry “U. Schiff”; University of Florence; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
| | - Lorenzo Tofani
- Department of Chemistry “U. Schiff”; University of Florence; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
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Airoldi C, D'Orazio G, Richichi B, Guzzi C, Baldoneschi V, Colombo L, Salmona M, Nativi C, Nicotra F, La Ferla B. Structural Modifications ofcis-Glycofused Benzopyran Compounds and Their Influence on the Binding to Amyloid-β Peptide. Chem Asian J 2015; 11:299-309. [DOI: 10.1002/asia.201501114] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Indexed: 01/22/2023]
Affiliation(s)
- Cristina Airoldi
- Department of Biotecnology and Bioscience (Btbs); University of Milano-Bicocca; Piazza della Scienza 2 I-20126 Milan Italy
| | - Giuseppe D'Orazio
- Department of Biotecnology and Bioscience (Btbs); University of Milano-Bicocca; Piazza della Scienza 2 I-20126 Milan Italy
| | - Barbara Richichi
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia 3-13 I-50019 Sesto Fiorentino (FI) Italy
| | - Cinzia Guzzi
- Department of Biotecnology and Bioscience (Btbs); University of Milano-Bicocca; Piazza della Scienza 2 I-20126 Milan Italy
| | - Veronica Baldoneschi
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia 3-13 I-50019 Sesto Fiorentino (FI) Italy
| | - Laura Colombo
- Department Biochemistry and Molecular Pharmacology; IRCCS-Istituto di Ricerche Farmacologiche “Mario Negri”; Via Giuseppe La Masa, 19 20156 Milano Italy
| | - Mario Salmona
- Department Biochemistry and Molecular Pharmacology; IRCCS-Istituto di Ricerche Farmacologiche “Mario Negri”; Via Giuseppe La Masa, 19 20156 Milano Italy
| | - Cristina Nativi
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia 3-13 I-50019 Sesto Fiorentino (FI) Italy
| | - Francesco Nicotra
- Department of Biotecnology and Bioscience (Btbs); University of Milano-Bicocca; Piazza della Scienza 2 I-20126 Milan Italy
| | - Barbara La Ferla
- Department of Biotecnology and Bioscience (Btbs); University of Milano-Bicocca; Piazza della Scienza 2 I-20126 Milan Italy
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Viglianisi C, Amorati R, Di Pietro L, Menichetti S. A Straightforward Route to Potent Phenolic Chain-Breaking Antioxidants by Acid-Promoted Transposition of 1,4-Benzo[b]oxathiines to Dihydrobenzo[b]thiophenes. Chemistry 2015; 21:16639-45. [PMID: 26440303 DOI: 10.1002/chem.201502650] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Indexed: 12/25/2022]
Abstract
The transformation of simple phenols with limited antioxidant activity into potent chain-breaking antioxidants was achieved by a three-step protocol, consisting of the conversion of phenols into 1,4-benzo[b]oxathiines followed by an unprecedented acid-promoted transposition to o-hydroxydihydrobenzo[b]thiophenes, or dihydrobenzo[de]thiochromenes, starting from phenols or naphthols, respectively. These derivatives, bearing a benzo-fused heterocycle with a sulfide sulfur ortho to the phenolic OH, have a rate constant of reaction with alkylperoxyl radicals (kinh ) comparable to that of α-tocopherol. A solid rationale for the transposition mechanism as well as for the structure-antioxidant activity relationship is presented.
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Affiliation(s)
- Caterina Viglianisi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Firenze (Italy).
| | - Riccardo Amorati
- Department of Chemistry "G. Ciamician", University of Bologna, Via S. Giacomo 11, 40126 Bologna (Italy)
| | - Leonardo Di Pietro
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Firenze (Italy)
| | - Stefano Menichetti
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Firenze (Italy).
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Viglianisi C, Marcantoni E, Carapacchi V, Menichetti S, Marsili L. A Base-Mediated Mild Sulfenylation of Indoles and Pyrrole with α-Acylthiones. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402894] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Viglianisi C, Sinni A, Menichetti S. Copper-Mediated One-Pot Access to 2,3-Dihydrobenzo[b][1,4]oxathiines fromo,o′-Dihydroxydisulfides. HETEROATOM CHEMISTRY 2014. [DOI: 10.1002/hc.21159] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Caterina Viglianisi
- Department of Chemistry ‘Ugo Schiff,’ University of Florence; Via della Lastruccia 3-13; I-50019 Sesto Fiorentino Italy
| | - Aidona Sinni
- Department of Chemistry ‘Ugo Schiff,’ University of Florence; Via della Lastruccia 3-13; I-50019 Sesto Fiorentino Italy
| | - Stefano Menichetti
- Department of Chemistry ‘Ugo Schiff,’ University of Florence; Via della Lastruccia 3-13; I-50019 Sesto Fiorentino Italy
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Aromaticity and Conjugation in 1,2-Benzoquinone Valence Isomers and Congeners. ADVANCES IN HETEROCYCLIC CHEMISTRY 2014. [DOI: 10.1016/b978-0-12-800170-7.00003-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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11
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Richichi B, Imberty A, Gillon E, Bosco R, Sutkeviciute I, Fieschi F, Nativi C. Synthesis of a selective inhibitor of a fucose binding bacterial lectin from Burkholderia ambifaria. Org Biomol Chem 2013; 11:4086-94. [DOI: 10.1039/c3ob40520f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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Marcantoni E, Cipolletti R, Marsili L, Menichetti S, Properzi R, Viglianisi C. An Efficient Catalytic Method for Regioselective Sulfenylation of Electron-Rich Aza-Aromatics at Room Temperature. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201100] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Regioselective copper(I)-catalyzed C–H hydroxylation/C–S coupling: expedient construction of 2-(styrylthio)phenols. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.04.048] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Viglianisi C, Simone L, Menichetti S. Copper‐Mediated One‐Pot Transformation of 2‐N‐Sulfonyl‐ aminoaryl Diselenides into Benzo[b][1,4]selenazines. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100587] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Caterina Viglianisi
- Dipartimento di Chimica “U. Schiff”, Polo Scientifico e Tecnologico Università di Firenze, Via della Lastruccia, 3‐13, 50019 Sesto Fiorentino, Italy, Fax. (+39)‐055‐457‐3531
| | - Lavinia Simone
- Dipartimento di Chimica “U. Schiff”, Polo Scientifico e Tecnologico Università di Firenze, Via della Lastruccia, 3‐13, 50019 Sesto Fiorentino, Italy, Fax. (+39)‐055‐457‐3531
| | - Stefano Menichetti
- Dipartimento di Chimica “U. Schiff”, Polo Scientifico e Tecnologico Università di Firenze, Via della Lastruccia, 3‐13, 50019 Sesto Fiorentino, Italy, Fax. (+39)‐055‐457‐3531
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15
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Viglianisi C, Bartolozzi MG, Pedulli GF, Amorati R, Menichetti S. Optimization of the Antioxidant Activity of Hydroxy-Substituted 4-Thiaflavanes: A Proof-of-Concept Study. Chemistry 2011; 17:12396-404. [DOI: 10.1002/chem.201101146] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 08/02/2011] [Indexed: 11/08/2022]
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Amorati R, Attanasi OA, Favi G, Menichetti S, Pedulli GF, Viglianisi C. Amphiphilic antioxidants from “cashew nut shell liquid” (CNSL) waste. Org Biomol Chem 2011; 9:1352-5. [DOI: 10.1039/c0ob01040e] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Menichetti S, Amorati R, Bartolozzi MG, Pedulli GF, Salvini A, Viglianisi C. A Straightforward Hetero-Diels-Alder Approach to (2-ambo,4′R,8′R)-α/β/γ/δ-4-Thiatocopherol. European J Org Chem 2010. [DOI: 10.1002/ejoc.200901493] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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18
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Litvak VV, Kondrat’ev AS, Shteimgarts VD. Synthesis of β-functionalized ethyl polyfluoroaryl sulfides, sulfoxides, and sulfones underlain by pentafluorobenzoic acid. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2009. [DOI: 10.1134/s1070428009110104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Menichetti S, Viglianisi C. Generation and Trapping of o-Thioquinones on Solid Support: Synthesis of Hydroxylated 4-Thiaflavans. PHOSPHORUS SULFUR 2009. [DOI: 10.1080/10426500902856339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Stefano Menichetti
- a Dipartimento di Chimica Organica and Laboratorio di Progettazione Sintesi e Studio di Eterocicli Biologicamente Attivi (HeteroBioLab), Polo Scientifico e Tecnologico , Università di Firenze , Sesto Fiorentino, Italy
| | - Caterina Viglianisi
- a Dipartimento di Chimica Organica and Laboratorio di Progettazione Sintesi e Studio di Eterocicli Biologicamente Attivi (HeteroBioLab), Polo Scientifico e Tecnologico , Università di Firenze , Sesto Fiorentino, Italy
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Amorati R, Catarzi F, Menichetti S, Pedulli GF, Viglianisi C. Effect of ortho-SR Groups on O−H Bond Strength and H-Atom Donating Ability of Phenols: A Possible Role for the Tyr-Cys Link in Galactose Oxidase Active Site? J Am Chem Soc 2007; 130:237-44. [DOI: 10.1021/ja075554h] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Riccardo Amorati
- Dipartimento di Chimica Organica “A. Mangini”, Università di Bologna, Via S. Donato 11, 40126 Bologna, Italy, and Dipartimento di Chimica Organica, e Laboratorio di Progettazione Sintesi e Studio di Eterocicli Bioattivi (HeteroBioLab), Polo Scientifico e Tecnologico Università di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (FI), Italy
| | - Francesca Catarzi
- Dipartimento di Chimica Organica “A. Mangini”, Università di Bologna, Via S. Donato 11, 40126 Bologna, Italy, and Dipartimento di Chimica Organica, e Laboratorio di Progettazione Sintesi e Studio di Eterocicli Bioattivi (HeteroBioLab), Polo Scientifico e Tecnologico Università di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (FI), Italy
| | - Stefano Menichetti
- Dipartimento di Chimica Organica “A. Mangini”, Università di Bologna, Via S. Donato 11, 40126 Bologna, Italy, and Dipartimento di Chimica Organica, e Laboratorio di Progettazione Sintesi e Studio di Eterocicli Bioattivi (HeteroBioLab), Polo Scientifico e Tecnologico Università di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (FI), Italy
| | - Gian Franco Pedulli
- Dipartimento di Chimica Organica “A. Mangini”, Università di Bologna, Via S. Donato 11, 40126 Bologna, Italy, and Dipartimento di Chimica Organica, e Laboratorio di Progettazione Sintesi e Studio di Eterocicli Bioattivi (HeteroBioLab), Polo Scientifico e Tecnologico Università di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (FI), Italy
| | - Caterina Viglianisi
- Dipartimento di Chimica Organica “A. Mangini”, Università di Bologna, Via S. Donato 11, 40126 Bologna, Italy, and Dipartimento di Chimica Organica, e Laboratorio di Progettazione Sintesi e Studio di Eterocicli Bioattivi (HeteroBioLab), Polo Scientifico e Tecnologico Università di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino (FI), Italy
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Amorati R, Cavalli A, Fumo MG, Masetti M, Menichetti S, Pagliuca C, Pedulli GF, Viglianisi C. Kinetic and Thermochemical Study of the Antioxidant Activity of Sulfur-Containing Analogues of Vitamin E. Chemistry 2007; 13:8223-30. [PMID: 17636469 DOI: 10.1002/chem.200700309] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Sulfur-containing analogues of vitamin E (thiachromanols), either linked or not to a catechol moiety, were synthesized and their hydrogen-atom donating ability evaluated. The determination of the O--H bond dissociation enthalpy (BDE) of the alpha-tocopherol analogue 4 by the electron paramagnetic resonance (EPR) equilibration technique provided a value of 78.9 kcal mol(-1), that is, approximately 1.8 kcal mol(-1) higher than that of alpha-tocopherol. The kinetic rate constants for the reaction with peroxyl radicals (kinh), measured by inhibited autoxidation studies, showed that thiachromanols react 2.5 times slower than the corresponding tocopherols, in agreement with the higher BDE value. This behavior was explained, on the basis of crystallographic analyses and DFT calculations, in terms of a change in the molecular geometry caused by insertion of a sulfur atom into the framework of vitamin E. This behavior implies a greater deviation of the condensed ring from coplanarity with the aromatic ring, thus giving rise to a decrease in the conjugative stabilization of the phenoxyl radical and consequently to an increase in the O--H bond strength. Although less reactive than tocopherols, thiachromanols may, however, act as bimodal antioxidants as a result of the hydroperoxide decomposing ability of the sulfur atom.
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Affiliation(s)
- Riccardo Amorati
- Dipartimento di Chimica Organica A. Mangini Università di Bologna, Via San Giacomo 11, 40126 Bologna, Italy
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Legnani L, Lunghi C, Albini FM, Nativi C, Richichi B, Toma L. Alternative Mechanistic Paths in the Hetero-Diels–Alder Reaction of α-Oxothiones: A Theoretical Study. European J Org Chem 2007. [DOI: 10.1002/ejoc.200700112] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Youssef MSK, Kandeel MM. The Utility of Diaryl Sulfides and Diaryl Sulfones in Heterocyclic Synthesis [1993–2003]. PHOSPHORUS SULFUR 2007. [DOI: 10.1080/104265090508541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | - Maymouna M. Kandeel
- a Department of Chemistry, Faculty of Science, Assiut University , Assiut, Egypt
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Menichetti S, Pagliuca C, Viglianisi C. Ortho-thioquinones and mediterranean diet: The sulfur connection. HETEROATOM CHEMISTRY 2007. [DOI: 10.1002/hc.20338] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Amorati R, Fumo M, Pedulli G, Menichetti S, Pagliuca C, Viglianisi C. Antioxidant and Antiradical Activity of Hydroxy-Substituted 4-Thiaflavanes. Helv Chim Acta 2006. [DOI: 10.1002/hlca.200690226] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Phthalimide-N-sulfenyl chloride in the Ti-catalyzed asymmetric sulfenylation of β-keto esters. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.10.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Contini A, Leone S, Menichetti S, Viglianisi C, Trimarco P. [2 + 4] and [4 + 2] Cycloadditions of o-Thioquinones with 1,3-Dienes: A Computational Study. J Org Chem 2006; 71:5507-14. [PMID: 16839129 DOI: 10.1021/jo0604538] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cycloadditions of o-thioquinones (o-TQs) with 1,3-dienes could proceed via either a [2 + 4] or a [4 + 2] mechanism. Under kinetic control and with acyclic dienes the reaction affords the spiro cycloadducts 5deriving from the [2 + 4] path as the main products. Under thermodynamic control, or with cyclic dienes, the o-TQs behave as heterodienes to give the benzoxathiin derivatives 4, in most cases with complete regioselectivity. In the present computational study, DFT calculations were performed in order to achieve a deep understanding of both [2 + 4] and [4 + 2] paths. The reactions of three o-TQs with six 1,3-dienes were thoroughly investigated at the B3LYP/TZVP//B3LYP6-31G level, and the two reaction mechanisms were then compared, evidencing that [2 + 4] cycloadditions are kinetically favored, strongly asynchronous, or even unconcerted, while [4 + 2] reactions are thermodynamically favored, quite asynchronous, but undoubtedly concerted. Moreover, the observed regioselectivity was rationalized by mean of the FMO theory and by comparison of the activation energies for different pathways.
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Affiliation(s)
- Alessandro Contini
- Istituto di Chimica Organica "Alessandro Marchesini", Facoltà di Farmacia, Università degli Studi di Milano, via Venezian 21, 20133 Milano, Italy.
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o-Thioquinones on [2.2]paracyclophanes: an example of totally stereocontrolled hetero Diels–Alder reactions. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.03.101] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Aversa MC, Bonaccorsi P, Faggi C, Lamanna G, Menichetti S. Enantiopure arenesulfenic acids as intermediates in stereoselective synthesis. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.09.052] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Menichetti S, Aversa MC, Cimino F, Contini A, Viglianisi C, Tomaino A. Synthesis and “double-faced” antioxidant activity of polyhydroxylated 4-thiaflavans. Org Biomol Chem 2005; 3:3066-72. [PMID: 16186941 DOI: 10.1039/b507496g] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple synthetic methodology, based on the inverse electron demand hetero Diels-Alder reaction of electron-poor dienic o-thioquinones with electron-rich styrenes used as dienophiles, allowed the preparation of several polyhydroxylated 4-thiaflavans. Such compounds, as a function of the nature and position of the substituents on the aromatic rings, as well as of the oxidation state of the sulfur atom, are able to behave in vitro as efficient antioxidants mimicking the action of catechol containing flavonoids or/and tocopherols. The possibility of joining together the potentialities of two relevant families of natural polyphenolic antioxidants appears particularly appealing since an efficient protection against free radicals and other reactive oxygen species (ROS) depends in vivo upon the synergic action of different antioxidant derivatives.
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Affiliation(s)
- Stefano Menichetti
- Dipartimento di Chimica Organica, Polo Scientifico-Università di Firenze, via della Lastruccia 13, 50019, Sesto Fiorentino, Florence, Italy.
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Menichetti S, Nativi C, Sarri P, Viglianisi C. Sulfur-mediated synthesis and antimicrobial activity of 4-thioisosteres of flavanoids. J Sulphur Chem 2004. [DOI: 10.1080/17415990412331299019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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syn -2,3-Disubstituted-2,3-dihydro-1,4-benzoxathiin rings: preparation from quinone ketals and 2-mercaptoethanols. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.05.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Song ZJ, King AO, Waters MS, Lang F, Zewge D, Bio M, Leazer JL, Javadi G, Kassim A, Tschaen DM, Reamer RA, Rosner T, Chilenski JR, Mathre DJ, Volante RP, Tillyer R. An efficient asymmetric synthesis of an estrogen receptor modulator by sulfoxide-directed borane reduction. Proc Natl Acad Sci U S A 2004; 101:5776-81. [PMID: 15079059 PMCID: PMC395984 DOI: 10.1073/pnas.0307415101] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
An efficient asymmetric synthesis of a selective estrogen receptor modulator (SERM) that has a dihydrobenzoxathiin core structure bearing two stereogenic centers is reported. The stereogenic centers were established by an unprecedented chiral sulfoxide-directed stereospecific reduction of an alpha,beta-unsaturated sulfoxide to the saturated sulfide in one step. Studies to elucidate the mechanism for this reduction are reported. Highly efficient Cu(I)-mediated ether formation was used to install the ether side chain, and selective debenzylation conditions were developed to remove the benzyl protecting groups on the phenols.
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Affiliation(s)
- Zhiguo J Song
- Department of Process Research, Merck Research Laboratories, P.O. Box 2000, Rahway, NJ 07065, USA.
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Bartolozzi A, Pacciani S, Benvenuti C, Cacciarini M, Liguori F, Menichetti S, Nativi C. Totally Stereoselective Synthesis of 1,3-Disaccharides through Diels−Alder Reactions. J Org Chem 2003; 68:8529-33. [PMID: 14575481 DOI: 10.1021/jo034556r] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A nonclassical, totally stereoselective synthesis of orthogonally protected 1,3-disaccharides is reported. Enantiomerically pure beta-keto-delta-lactones, efficiently obtained from glucal and galactal, are transformed into electron-poor heterodienes and chemo-, regio-, and stereoselectively cycloadded to glycals as electron-rich dienophiles, to directly afford 2-thiodisaccharides. The reductive desulfurization of the latter smoothly gave the corresponding 2,2'-dideoxydisaccharides.
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Affiliation(s)
- Alessandra Bartolozzi
- Dipartimento di Chimica Organica Ugo Schiff, Universita' di Firenze, and CNR-ICCOM, via della Lastruccia, 13 I-50019 Sesto Fiorentino (FI), Italy
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Menichetti S, Viglianisi C. [2+4] vs [4+2] Cycloaddition reactions of o-thioquinones with 1,3-dienes. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00811-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kim S, Wu JY, Chen HY, DiNinno F. Dehydrative reduction: a highly diastereoselective synthesis of syn-bisaryl(or heteroaryl) dihydrobenzoxathiins and benzodioxane. Org Lett 2003; 5:685-8. [PMID: 12605490 DOI: 10.1021/ol0274763] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
TFA/Et(3)SiH-mediated cyclization of thioketones 5 derived from the reaction of functionalized thiophenols (catechols) with bromo ketones gave syn 2,3-bisaryl(or heteroaryl) dihydrobenzoxathiins and benzodioxane 1 with total diastereoselectivity (>99:1), in excellent yields.
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Affiliation(s)
- Seongkon Kim
- Department of Medicinal Chemistry, Merck Research Laboratories, Rahway, New Jersey 07065, USA.
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Delogu G, Fabbri D, Menichetti S, Nativi C. Torsional angles in 6,6′-bridged atropoisomeric biphenyls control the electrophilic substitution with phthalimidesulfenyl chloride. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00178-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Yemets S, Bandera Y, Timoshenko V, Shermolvich Y. Synthesis of 5,6-dihydro-2H-thiins and 2,3-dihydro-1,4-oxathiins based on 1-benzylsulfonyl-1,1-dihydropolyfluoroalkan-2-ones. J Fluor Chem 2002. [DOI: 10.1016/s0022-1139(02)00061-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Capozzi G, Delogu G, Fabbri D, Marini M, Menichetti S, Nativi C. Regiocontrolled synthesis of enantiopure 3,3'-thiosubstituted biphenyls. J Org Chem 2002; 67:2019-26. [PMID: 11925205 DOI: 10.1021/jo0157627] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Sulfenylation of 6,6'-dimethoxy-2,2'-dihydroxybiphenyl, used as a racemic mixture and single enantiomers, by phthalimidesulfenyl chloride afforded the corresponding 3,3'-N,N'-dithiophthalimide with complete regioselectivity. Simple manipulations of the latter compound allowed access to the corresponding bis-thiol or o-thioquinone as useful intermediates for the synthesis of new sulfur-containing open-chain and macrocyclic C(2) enantiopure ligands. The application of this methodology to the preparation of a biphenyl bearing two cysteine units as potential HIV-1 protease inhibitor is also described.
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Affiliation(s)
- Giuseppe Capozzi
- Centro CNR "Chimica dei Composti Eterociclici", Dipartimento di Chimica Organica, Universita' di Firenze, via G. Capponi 9, I-50121, Firenze, Italy
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Nair V, Mathew B, Menon RS, Mathew S, Vairamani M, Prabhakar S. [4+2] Cycloaddition reactions of o-thioquinones with pentafulvenes: efficient synthesis of benzoxathiins. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00263-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Delogu G, Fabbri D, Dettori MA, Capozzi G, Menichetti S, Nativi C. Desymmetrization of 2,2′,6,6′-tetramethoxybiphenyl by regioselective sulfenylation reaction. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s0957-4166(02)00012-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Hetero Diels–Alder reactions of o-thioquinones with cyclic dienes: an efficient synthesis of novel heterocyclic compounds. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00814-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Bartolozzi A, Capozzi G, Falciani C, Menichetti S, Nativi C, Bacialli AP. Regio- and Stereoselective Synthesis of 4‘-Thiaspiroacetals from Carbohydrates. J Org Chem 1999. [DOI: 10.1021/jo990416z] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alessandra Bartolozzi
- Centro CNR “Chimica dei Composti Eterociclici”, Dipartimento di Chimica Organica, Universita' di Firenze, Via Gino Capponi, 9. I-50121 Firenze, Italy
| | - Giuseppe Capozzi
- Centro CNR “Chimica dei Composti Eterociclici”, Dipartimento di Chimica Organica, Universita' di Firenze, Via Gino Capponi, 9. I-50121 Firenze, Italy
| | - Chiara Falciani
- Centro CNR “Chimica dei Composti Eterociclici”, Dipartimento di Chimica Organica, Universita' di Firenze, Via Gino Capponi, 9. I-50121 Firenze, Italy
| | - Stefano Menichetti
- Centro CNR “Chimica dei Composti Eterociclici”, Dipartimento di Chimica Organica, Universita' di Firenze, Via Gino Capponi, 9. I-50121 Firenze, Italy
| | - Cristina Nativi
- Centro CNR “Chimica dei Composti Eterociclici”, Dipartimento di Chimica Organica, Universita' di Firenze, Via Gino Capponi, 9. I-50121 Firenze, Italy
| | - Alessia Paolacci Bacialli
- Centro CNR “Chimica dei Composti Eterociclici”, Dipartimento di Chimica Organica, Universita' di Firenze, Via Gino Capponi, 9. I-50121 Firenze, Italy
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Capozzi G, Delogu G, Dettori MA, Fabbri D, Menichetti S, Nativi C, Nuti R. Phthalimidesulfenyl chloride part 13.1 3,3′-regioselective thiofunctionalization of atropisomeric 2,2′-biphenols. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)00762-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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47
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