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Te Grotenhuis C, Das BG, Kuijpers PF, Hageman W, Trouwborst M, de Bruin B. Catalytic 1,2-dihydronaphthalene and E-aryl-diene synthesis via Co III-Carbene radical and o-quinodimethane intermediates. Chem Sci 2017; 8:8221-8230. [PMID: 29568470 PMCID: PMC5857932 DOI: 10.1039/c7sc03909c] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 10/11/2017] [Indexed: 11/21/2022] Open
Abstract
Catalytic synthesis of substituted 1,2-dihydronaphthalenes via metalloradical activation of o-styryl N-tosyl hydrazones ((E)-2-(prop-1-en-1-yl)benzene-N-tosyl hydrazones) is presented, taking advantage of the intrinsic reactivity of a cobalt(iii)-carbene radical intermediate. The method has been successfully applied to a broad range of substrates with various R1 substituents at the aromatic ring, producing the desired ring products in good to excellent isolated yields for substrates with an R2 = COOEt substituent at the vinylic position (∼70-90%). Changing the R2 moiety from an ester to other substituents has a surprisingly large influence on the (isolated) yields. This behaviour is unexpected for a radical rebound ring-closure mechanism, and points to a mechanism proceeding via ortho-quinodimethane (o-QDM) intermediates. Furthermore, substrates with an alkyl substituent on the allylic position reacted to form E-aryl-dienes in excellent yields, rather than the expected 1,2-dihydronaphthalenes. This result, combined with the outcome of supporting DFT calculations, strongly points to the release of reactive o-QDM intermediates from the metal centre in all cases, which either undergo a 6π-cyclisation step to form the 1,2-dihydronaphthalenes, or a [1,7]-hydride shift to produce the E-aryl-dienes. Trapping experiments using TEMPO confirm the involvement of cobalt(iii)-carbene radical intermediates. EPR spectroscopic spin-trapping experiments using phenyl N-tert-butylnitrone (PBN) confirm the radical nature of the catalytic reaction.
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Affiliation(s)
- Colet Te Grotenhuis
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
| | - Braja G Das
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
| | - Petrus F Kuijpers
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
| | - Wouter Hageman
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
| | - Mees Trouwborst
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
| | - Bas de Bruin
- Homogeneous, Supramolecular and Bio-Inspired Catalysis (HomKat) Group , Van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , The Netherlands .
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Silva EMP, Melo T, Sousa BC, Resende DISP, Magalhães LM, Segundo MA, Silva AMS, Domingues MRM. Do cinnamylideneacetophenones have antioxidant properties and a protective effect toward the oxidation of phosphatidylcholines? Eur J Med Chem 2016; 121:331-337. [PMID: 27267003 DOI: 10.1016/j.ejmech.2016.05.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 04/29/2016] [Accepted: 05/19/2016] [Indexed: 01/03/2023]
Abstract
Cinnamylideneacetophenones (CA) are an important group of α,β,γ,δ-diunsaturated ketones that have been widely used in a variety of synthetic transformations. Biological studies concerning these compounds are scarce and refer mainly to antiviral and antibacterial evaluations. Curcumin (CR), a natural polyphenol, is a yellow pigment extracted from the plant Curcuma longa, which is one of the major spices used in the Indian culinary. It has been reported that CR has cancer chemopreventive properties in a range of animal models of chemical carcinogenesis, along with antioxidative and anti-inflammatory properties. Inspired by the biological activity shown by CR and their structural resemblance with CA, it was considered to study the ability of the latter molecules to inhibit lipid oxidation induced by the hydroxyl radical (Fenton reaction) by electrospray ionization (ESI) mass spectrometry (MS) using phosphatidylcholine (PC) liposomes as a model of cell membrane. Compound 4, holding a methylated hydroxy group in the position R(2), and CR showed similar effects in inhibiting lipid peroxidation. In the presence of 7, the extension of oxidation was higher than the one verified in all other compounds. Other methodologies, namely DPPH radical scavenging and oxygen radical absorption capacity (ORAC) assays, were performed to complement and clarify the results attained by oxidation of PC monitored by ESI-MS and to evaluate the antioxidant profile of compounds. For both assays, compound 7 showed to be rather efficient due to its specific structure. This derivative can form a quite stable allylic radical by abstraction of a hydrogen atom which accounts for these results.
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Affiliation(s)
- Eduarda M P Silva
- Organic Chemistry Group, QOPNA, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Tânia Melo
- Mass Spectrometry Centre, QOPNA, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Bebiana C Sousa
- Organic Chemistry Group, QOPNA, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal; Mass Spectrometry Centre, QOPNA, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Diana I S P Resende
- Organic Chemistry Group, QOPNA, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Luís M Magalhães
- UCIBIO, REQUIMTE, Department of Chemistry, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Marcela A Segundo
- UCIBIO, REQUIMTE, Department of Chemistry, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313, Porto, Portugal
| | - Artur M S Silva
- Organic Chemistry Group, QOPNA, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - M Rosário M Domingues
- Mass Spectrometry Centre, QOPNA, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
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Cangelosi B, Clematis F, Monroy F, Roversi PF, Troiano R, Curir P, Lanzotti V. Filiferol, a chalconoid analogue from Washingtonia filifera possibly involved in the defence against the Red Palm Weevil Rhynchophorus ferrugineus Olivier. PHYTOCHEMISTRY 2015; 115:216-221. [PMID: 25725962 DOI: 10.1016/j.phytochem.2015.02.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 12/27/2014] [Accepted: 02/05/2015] [Indexed: 06/04/2023]
Abstract
A chalconoid analogue, 1,3,5-benzentriol 2-[(2S,3R)-3-(3,4-dihydroxylphenyl)-2,3-dihydroxylpropyl], named filiferol (1), has been isolated and purified for the first time from the leaf basal tissues of the palm species Washingtonia filifera. The chemical structure of the isolated compound has been elucidated unambiguously by spectroscopic and chemical methods. Filiferol has been based on a flavonol structure with the reduction of the common flavonoid keto group to give an unprecedented methylene carbon on the three carbon chain. An analogous compound with S stereochemistry at C3 has been obtained as synthetic intermediate for developing an enantioselective synthesis of (2R,3S)-(+)-catechin. Even though 1 proved to be deprived of antifungal properties, it displays a very effective larvicidal activity against Red Palm Weevil, Rhynchophorus ferrugineus, an important pest affecting cultivated and ornamental palms. 1 has been isolated from leaf tissues of W. filifera, a species resistant to this pest, but this molecule seems instead undetectable in tissues of other palm species susceptible to the parasite. The presence of 1 could therefore account for W. filifera natural resistance to the attacks of the Red Palm Weevil (R. ferrugineus).
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Affiliation(s)
- Benedetta Cangelosi
- Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Research Unit for Floriculture and Ornamental Species, Corso Inglesi 508, 18038 Sanremo, Italy
| | - Francesca Clematis
- Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Research Unit for Floriculture and Ornamental Species, Corso Inglesi 508, 18038 Sanremo, Italy
| | - Fernando Monroy
- Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Research Unit for Floriculture and Ornamental Species, Corso Inglesi 508, 18038 Sanremo, Italy
| | - Pio Federico Roversi
- Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Research Centre for Agrobiology and Pedology, Piazza M. D'Azeglio 30, 50121 Firenze, Italy.
| | - Raffaele Troiano
- Università degli Studi di Napoli Federico II, Dipartimento di Agraria, Via Università 100, 80055 Portici, Italy
| | - Paolo Curir
- Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Research Unit for Floriculture and Ornamental Species, Corso Inglesi 508, 18038 Sanremo, Italy.
| | - Virginia Lanzotti
- Università degli Studi di Napoli Federico II, Dipartimento di Agraria, Via Università 100, 80055 Portici, Italy.
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An unexpected rearrangement-hydration reaction sequence of 2H-chromenes to dihydrochalcones under catalysis of HAuCl4. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.08.117] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Resende DISP, Silva EMP, Barros C, Domingues MRM, Silva AMS, Cavaleiro JAS. Tandem mass spectrometry based investigation of cinnamylideneacetophenone derivatives: valuable tool for the differentiation of positional isomers. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2011; 25:3185-3195. [PMID: 21953975 DOI: 10.1002/rcm.5207] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Cinnamylideneacetophenones have been extensively used as versatile starting materials in numerous different transformations. The structural characterization of this type of compounds is, therefore, of crucial importance since it can give information on the chemistry, reactivity and also the potential biological activity of this type of compounds. Thus, 24 derivatives were systematically studied by tandem mass spectrometry (MS(2)) with electrospray ionization (ESI), in positive ion mode. The protonated molecules, [M + H](+), formed under ESI conditions were induced to dissociate and the fragmentation patterns were studied. The information collected provided important structural information on the type of substituents present and constitute an important database concerning this family of compounds. Overall, it was found that the substitution pattern of the cinnamylideneacetophenone derivatives changes the ESI-MS(2) fragmentation considerably. These results indicate that ESI-MS(2) is a useful technique for distinguishing positional isomers of these cinnamylideneacetophenone derivatives.
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Sharma A, Sharma N, Shard A, Kumar R, Mohanakrishnan D, Saima, Sinha AK, Sahal D. Tandem allylic oxidation–condensation/esterification catalyzed by silica gel: an expeditious approach towards antimalarial diaryldienones and enones from natural methoxylated phenylpropenes. Org Biomol Chem 2011; 9:5211-9. [DOI: 10.1039/c1ob05293d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Xin Y, Zang ZH, Chen FL. Ultrasound-Promoted Synthesis of 1,5-Diarylpenta-2,4-dien-1-ones Catalyzed by Activated Barium Hydroxide. SYNTHETIC COMMUN 2009. [DOI: 10.1080/00397910902883686] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Jin H, Xiang L, Wen F, Tao K, Liu Q, Hou T. Improved synthesis of chalconoid-like compounds under ultrasound irradiation. ULTRASONICS SONOCHEMISTRY 2008; 15:681-683. [PMID: 18328764 DOI: 10.1016/j.ultsonch.2008.01.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2007] [Revised: 01/06/2008] [Accepted: 01/18/2008] [Indexed: 05/26/2023]
Abstract
Claisen-Schmidt condensation of various substituted acetophenones with cinnamaldehyde catalyzed by KF-Al2O3 results chalconoid-like compounds, (2E,4E)-1,5-diarylpenta-2,4-dien-1-ones, in 67-92% yields in 5-60 min under ultrasound irradiation.
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Affiliation(s)
- Hong Jin
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, PR China
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