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Lasri J, Eltayeb NE, Soliman SM, Ali EMM, Alhayyani S, Akhdhar A. Synthesis, Crystal Structure, DFT, and Anticancer Activity of Some Imine-Type Compounds via Routine Schiff Base Reaction: An Example of Unexpected Cyclization to Oxazine Derivative. Molecules 2023; 28:4766. [PMID: 37375321 DOI: 10.3390/molecules28124766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 06/07/2023] [Accepted: 06/09/2023] [Indexed: 06/29/2023] Open
Abstract
The synthesis, characterization, and anticancer properties of three imine-type compounds 1-3 and an unexpected oxazine derivative 4 are presented. The reaction of p-dimethylaminobenzaldehyde or m-nitrobenzaldehyde with hydroxylamine hydrochloride afforded the corresponding oximes 1-2 in good yields. Additionally, the treatment of benzil with 4-aminoantipyrine or o-aminophenol was investigated. Routinely, the Schiff base (4E)-4-(2-oxo-1,2-diphenylethylideneamino)-1,2-dihydro-1,5-dimethyl-2-phenylpyrazol-3-one 3 was obtained in the case of 4-aminoantipyrine. Unexpectedly, the reaction of benzil with o-aminophenol proceeded with cyclization to produce the 2,3-diphenyl-2H-benzo[b][1,4]oxazin-2-ol 4. The structures of compounds 3 and 4 were unambiguously determined by single crystal X-ray diffraction. Hirshfeld analysis of molecular packing revealed the importance of the O…H (11.1%), N…H (3.4%), C…H (29.4%), and C…C (1.6) interactions in the crystal stability of 3. In the case of 4, the O…H (8.8%), N…H (5.7%), and C…H (30.3%) interactions are the most important. DFT calculations predicted that both compounds have a polar nature, and 3 (3.4489 Debye) has higher polarity than 4 (2.1554 Debye). Different reactivity descriptors were calculated for both systems based on the HOMO and LUMO energies. The NMR chemical shifts were calculated and were found well correlated with the experimental data. HepG2 growth was suppressed by the four compounds more than MCF-7. The IC50 values of 1 against HepG2 and MCF-7 cell lines were the lowest, and it is considered the most promising candidate as an anticancer agent.
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Affiliation(s)
- Jamal Lasri
- Department of Chemistry, Rabigh College of Science and Arts, King Abdulaziz University, P.O. Box 344, Jeddah 21589, Saudi Arabia
| | - Naser E Eltayeb
- Department of Chemistry, Rabigh College of Science and Arts, King Abdulaziz University, P.O. Box 344, Jeddah 21589, Saudi Arabia
| | - Saied M Soliman
- Department of Chemistry, Faculty of Science, Alexandria University, Ibrahimia, Alexandria 21321, Egypt
| | - Ehab M M Ali
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Sultan Alhayyani
- Department of Chemistry, Rabigh College of Science and Arts, King Abdulaziz University, P.O. Box 344, Jeddah 21589, Saudi Arabia
| | - Abdullah Akhdhar
- Department of Chemistry, College of Science, University of Jeddah, Jeddah 21959, Saudi Arabia
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Synthesis, crystal structure, DFT and biological activity of E-pyrene-1-carbaldehyde oxime and E-2-naphthaldehyde oxime. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.127848] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Gonçalves ACR, Rettondin AR, Oliveira CG, Patrocinio AOT, Machado AEH, Deflon VM, Abram U, Maia PIS. Intramolecular C(sp 2)–C (sp 2) bond formation between phenanthroline and β-diketone thiosemicarbazones in Pt II complexes: crystal structures and computational studies. Dalton Trans 2020; 49:9564-9567. [DOI: 10.1039/d0dt00367k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
[PtCl2(phen)] reacts with β-diketone derived thiosemicarbazones leading to an intramolecular C–C coupling and formation of tetracoordinated N,N,N,S-chelates [PtII(phenLR)].
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Affiliation(s)
- Ana C. R. Gonçalves
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio)
- Universidade Federal do Triângulo Mineiro
- Uberaba
- Brazil
| | - Andressa R. Rettondin
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio)
- Universidade Federal do Triângulo Mineiro
- Uberaba
- Brazil
| | - Carolina G. Oliveira
- Laboratório de Fotoquímica e Ciência dos Materiais (LAFOT-CM)
- Instituto de Química
- Universidade Federal de Uberlândia
- Uberlândia
- Brazil
| | - Antonio O. T. Patrocinio
- Laboratório de Fotoquímica e Ciência dos Materiais (LAFOT-CM)
- Instituto de Química
- Universidade Federal de Uberlândia
- Uberlândia
- Brazil
| | - Antonio E. H. Machado
- Laboratório de Fotoquímica e Ciência dos Materiais (LAFOT-CM)
- Instituto de Química
- Universidade Federal de Uberlândia
- Uberlândia
- Brazil
| | - Victor M. Deflon
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Ulrich Abram
- Freie Universität Berlin
- Institute of Chemistry and Biochemistry
- D-14195 Berlin
- Germany
| | - Pedro I. S. Maia
- Núcleo de Desenvolvimento de Compostos Bioativos (NDCBio)
- Universidade Federal do Triângulo Mineiro
- Uberaba
- Brazil
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Pentafluorophenyl Platinum(II) Complexes of PTA and its N-Allyl and N-Benzyl Derivatives: Synthesis, Characterization and Biological Activity. MATERIALS 2019; 12:ma12233907. [PMID: 31779206 PMCID: PMC6926962 DOI: 10.3390/ma12233907] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/19/2019] [Accepted: 11/22/2019] [Indexed: 12/28/2022]
Abstract
From the well-known 1,3,5-triaza-phosphaadamantane (PTA, 1a), the novel N-allyl and N-benzyl tetrafuoroborate salts 1-allyl-1-azonia-3,5-diaza-7-phosphaadamantane (APTA(BF4), 1b) and 1-benzyl-1-azonia-3,5-diaza-7-phosphaadamantane (BzPTA(BF4), 1c) were obtained. These phosphines were then allowed to react with (Pt(μ-Cl)(C6F5)(tht))2 (tht = tetrahydrothiophene) affording the water soluble Pt(II) complexes trans-(PtCl(C6F5)(PTA)2) (2a) and its bis-cationic congeners trans-(PtCl(C6F5)(APTA)2)(BF4)2 (2b) and trans-(PtCl(C6F5)(BzPTA)2)(BF4)2 (2c). The compounds were fully characterized by multinuclear NMR, ESI-MS, elemental analysis and (for 2a) also by single crystal X-ray diffraction, which proved the trans configuration of the phosphine ligands. Furthermore, in order to evaluate the cytotoxic activities of all complexes the normal human dermal fibroblast (NHDF) cell culture were used. The antineoplastic activity of the investigated compounds was checked against the human lung carcinoma (A549), epithelioid cervix carcinoma (HeLa) and breast adenocarcinoma (MCF-7) cell cultures. Interactions between the complexes and human serum albumin (HSA) using fluorescence spectroscopy and circular dichroism spectroscopy (CD) were also investigated.
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PtII versus PdII-assisted [2 + 3] cycloadditions of nitriles and nitrone. Synthesis of nitrile-derived arylamido platinum(II) and Δ4-1,2,4-oxadiazoline palladium(II) complexes. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.10.057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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Synthesis and characterization of ferrocene-based Schiff base and ferrocenecarboxaldehyde oxime and their adsorptive removal of methyl blue from aqueous solution. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.04.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lasri J, Chulvi K, Eltayeb NE. Crystal structures of ( E)-1-naphthaldehyde oxime and ( E)-phenanthrene-9-carbaldehyde oxime. Acta Crystallogr E Crystallogr Commun 2018; 74:332-336. [PMID: 29765717 PMCID: PMC5947797 DOI: 10.1107/s2056989018002116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 02/04/2018] [Indexed: 11/13/2022]
Abstract
The aldoximes C11H9NO (I) and C15H11NO (II), synthesized in ca 90% yield, by treatment of 1-naphthaldehyde or phenanthrene-9-carbaldehyde, respectively, with hydroxyl-amine hydro-chloride and sodium carbonate, have been characterized by IR, 1H, 13C and DEPT-135 NMR spectroscopies, and also by single-crystal X-ray diffraction analysis. The mol-ecules of (I) and (II) are conformationally similar, with the aldoxime substituent groups lying outside the planes of the naphthalene or phenanthrene rings, forming dihedral angles with them of 23.9 (4) and 27.9 (6)°, respectively. The crystal structures of both (I) and (II) are similar with a single inter-molecular O-H⋯N hydrogen-bonding inter-action, giving rise to the formation of one-dimensional polymeric chains extending along the 21 (b) screw axes in each.
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Affiliation(s)
- Jamal Lasri
- Department of Chemistry, Rabigh College of Science and Arts, PO Box 344, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Katherine Chulvi
- FB 1.3 Strukturanalytik, Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Germany
| | - Naser Eltaher Eltayeb
- Department of Chemistry, Rabigh College of Science and Arts, PO Box 344, King Abdulaziz University, Jeddah, Saudi Arabia
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Bolotin DS, Bokach NA, Demakova MY, Kukushkin VY. Metal-Involving Synthesis and Reactions of Oximes. Chem Rev 2017; 117:13039-13122. [PMID: 28991449 DOI: 10.1021/acs.chemrev.7b00264] [Citation(s) in RCA: 132] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This review classifies and summarizes the past 10-15 years of advancements in the field of metal-involving (i.e., metal-mediated and metal-catalyzed) reactions of oximes. These reactions are diverse in nature and have been employed for syntheses of oxime-based metal complexes and cage-compounds, oxime functionalizations, and the preparation of new classes of organic species, in particular, a wide variety of heterocyclic systems spanning small 3-membered ring systems to macroheterocycles. This consideration gives a general outlook of reaction routes, mechanisms, and driving forces and underlines the potential of metal-involving conversions of oxime species for application in various fields of chemistry and draws attention to the emerging putative targets.
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Affiliation(s)
- Dmitrii S Bolotin
- Institute of Chemistry, Saint Petersburg State University , Universitetskaya Nab., 7/9, Saint Petersburg, Russian Federation
| | - Nadezhda A Bokach
- Institute of Chemistry, Saint Petersburg State University , Universitetskaya Nab., 7/9, Saint Petersburg, Russian Federation
| | - Marina Ya Demakova
- Institute of Chemistry, Saint Petersburg State University , Universitetskaya Nab., 7/9, Saint Petersburg, Russian Federation
| | - Vadim Yu Kukushkin
- Institute of Chemistry, Saint Petersburg State University , Universitetskaya Nab., 7/9, Saint Petersburg, Russian Federation
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10
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Pt(II) and Pd(II)-assisted coupling of nitriles and 1,3-diiminoisoindoline: Synthesis and luminescence properties of (1,3,5,7,9-pentaazanona-1,3,6,8-tetraenato)Pt(II) and Pd(II) complexes. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.05.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Smirnov AS, Kritchenkov AS, Bokach NA, Kuznetsov ML, Selivanov SI, Gurzhiy VV, Roodt A, Kukushkin VY. Regio- and Stereoselective 1,3-Dipolar Cycloaddition of Cyclic Azomethine Imines to Platinum(IV)-Bound Nitriles Giving Δ(2)-1,2,4-Triazoline Species. Inorg Chem 2015; 54:11018-30. [PMID: 26536298 DOI: 10.1021/acs.inorgchem.5b02246] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The complex trans-[PtCl4(EtCN)2] (14) reacts smoothly at 25 °C with the stable cyclic azomethine imines R(1)CH═N(a)NC(O)CH(NHC(O)C6H4R(3))C(b)H(C6H4R(2))((a-b)) [R(1)/R(2)/R(3) = p-Me/H/H (8); p-Me/p-Me/H (9); p-Me/p-MeO/H (10); p-Me/p-Cl/p-Cl (11); p-MeO/p-Me/H (12); p-MeO/p-Cl/m-Me (13)], and the reaction proceeds as stereoselective 1,3-dipolar cycloaddition to one of the EtCN ligands accomplishing the monocycloadducts trans-[PtCl4(EtCN){N(a)═C(Et)N(b)C(O)CH(NHC(O)C6H4R(3))CH(C6H4R(2))N(c)C(d)HR(1)}])((a-d;b-c)) [R(1)/R(2)/R(3) = p-Me/H/H (15); p-Me/p-Me/H (16); p-Me/p-MeO/H (17); p-Me/p-Cl/p-Cl (18); p-MeO/p-Me/H (19); p-MeO/p-Cl/m-Me (20)]. Inspection of the obtained and literature data indicate that the cycloaddition of the azomethine imines to the C≡N bonds of HCN and of Pt(IV)-bound EtCN has different regioselectivity leading to Δ(2)-1,2,3-triazolines and Δ(2)-1,2,4-triazolines, respectively. Platinum(II) species trans-[PtCl2(EtCN){N(a)═C(Et)N(b)C(O)CH(NHC(O)C6H4R(3))CH(C6H4R(2))N(c)C(d)HR(1)}]((a-d;b-c)) [R(1)/R(2)/R(3) = p-Me/H/H (21); p-Me/p-Me/H (22); p-Me/p-MeO/H (23); p-Me/p-Cl/p-Cl (24); p-MeO/p-Me/H (25); p-MeO/p-Cl/m-Me (26)] were obtained by a one-pot procedure from 14 and 8-13 followed by addition of the phosphorus ylide Ph3P═CHCO2Me. Δ(2)-1,2,4-Triazolines N(a)═C(Et)N(b)C(O)CH(NHC(O)C6H4R(3))CH(C6H4R(2))N(c)C(d)HR(1(a-d;b-c)) [R(1)/R(2)/R(3) = p-Me/H/H (27); p-Me/p-Me/H (28); p-Me/p-MeO/H (29); p-Me/p-Cl/p-Cl (30); p-MeO/p-Me/H (31); p-MeO/p-Cl/m-Me (32)] were liberated from 21-26 by the treatment with bis(diphenylphosphyno)ethane (dppe). Platinum(II) complexes 21-26 were characterized by elemental analyses (C, H, N), high-resolution electrospray ionization mass spectrometry (ESI-MS), and IR and (1)H and (13)C{(1)H} NMR spectroscopies and single crystal X-ray diffraction in the solid state for 25·CH3OH, 26·(CHCl3)0.84. The structure of 26 was also determined by COSY-90 and NOESY NMR methods in solution. Quantitative evaluation of several pairs of interproton distances obtained by NMR and X-ray diffraction agrees well with each other and with those obtained by the MM+ calculation method. Platinum(IV) complexes 15-20 were characterized by (1)H NMR spectroscopy. Metal-free 6,7-dihydropyrazolo[1,2-a][1,2,4]triazoles (27-32) were characterized by high-resolution ESI-MS and IR and (1)H and (13)C{(1)H} NMR spectroscopies and single crystal X-ray diffraction for 29·CDCl3. Theoretical density functional theory calculations were carried out for the investigation of the reaction mechanism, interpretation of the reactivity of Pt-bound and free nitriles toward azomethine imines and analysis of the regio- and stereoselectivity origin.
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Affiliation(s)
- Andrey S Smirnov
- Saint Petersburg State University , Universitetskaya nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Andreii S Kritchenkov
- Saint Petersburg State University , Universitetskaya nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Nadezhda A Bokach
- Saint Petersburg State University , Universitetskaya nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Maxim L Kuznetsov
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa , Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Stanislav I Selivanov
- Saint Petersburg State University , Universitetskaya nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Vladislav V Gurzhiy
- Saint Petersburg State University , Universitetskaya nab. 7/9, 199034, Saint Petersburg, Russian Federation
| | - Andreas Roodt
- Department of Chemistry, University of the Free State , P.O. Box 339, Bloemfontein 9300, South Africa
| | - Vadim Yu Kukushkin
- Saint Petersburg State University , Universitetskaya nab. 7/9, 199034, Saint Petersburg, Russian Federation.,Institute of Macromolecular Compounds of Russian Academy of Sciences , V.O. Bolshoii Pr. 31, 199004 Saint Petersburg, Russian Federation
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Lasri J, Soliman SM, Januário Charmier MA, Ríos-Gutiérrez M, Domingo LR. Synthesis, molecular structure and stability of fused bicyclic Δ4-1,2,4-oxadiazoline Pt(II) complexes. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.05.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Smirnov AS, Yandanova ES, Bokach NA, Starova GL, Gurzhiy VV, Avdontceva MS, Zolotarev AA, Kukushkin VY. Zinc(ii)-mediated generation of 5-amino substituted 2,3-dihydro-1,2,4-oxadiazoles and their further ZnII-catalyzed and O2-involving transformations. NEW J CHEM 2015. [DOI: 10.1039/c5nj02061a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
ZnII-activated cyanamides NCNR2 react with the acyclic N-alkyl ketonitrones Ph2CN+(O−)R′ achieving uncomplexed 2,3-dihydro-1,2,4-oxadiazoles.
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Affiliation(s)
| | | | | | | | | | | | | | - Vadim Yu. Kukushkin
- Saint Petersburg State University
- 199034 Saint Petersburg
- Russia
- Institute of Macromolecular Compounds of Russian Academy of Sciences
- 199004 Saint Petersburg
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Lasri J. Palladium(II)-assisted [2+3] cycloaddition of nitrones to organonitriles: Synthesis of 2,3-dihydropyrrolo[1,2-a]quinazolin-5-one and Δ4-1,2,4-oxadiazoline derivatives. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.04.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Lasri J, Kuznetsov ML, Guedes da Silva MFC, Pombeiro AJL. PtII-Mediated Imine–Nitrile Coupling Leading to Symmetrical (1,3,5,7,9-Pentaazanona-1,3,6,8-tetraenato)Pt(II) Complexes Containing the Incorporated 1,3-Diiminoisoindoline Moiety. Inorg Chem 2012; 51:10774-86. [DOI: 10.1021/ic301176b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jamal Lasri
- Centro de Química Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon,
Portugal
| | - Maxim L. Kuznetsov
- Centro de Química Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon,
Portugal
| | - M. Fátima C. Guedes da Silva
- Centro de Química Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon,
Portugal
- Universidade Lusófona de Humanidades e Tecnologias, Av. Campo Grande 376,
ULHT Lisbon, 1749-024, Lisbon, Portugal
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural,
Complexo I, Instituto Superior Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon,
Portugal
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Copper(II)-mediated in-situ hydrolyses of pyrroline N-oxide and benzonitrile leading to a mixed ligand complex. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.01.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Kritchenkov AS, Bokach NA, Haukka M, Kukushkin VY. Unexpectedly efficient activation of push–pull nitriles by a PtII center toward dipolar cycloaddition of Z-nitrones. Dalton Trans 2011; 40:4175-82. [DOI: 10.1039/c0dt01689f] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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18
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Menezes FMC, Kuznetsov ML, Pombeiro AJL. Isocyanide Complexes with Platinum and Palladium and Their Reactivity toward Cycloadditions with Nitrones to Form Aminooxycarbenes: A Theoretical Study. Organometallics 2009. [DOI: 10.1021/om900513b] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Filipe M. C. Menezes
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, TU Lisbon, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Maxim L. Kuznetsov
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, TU Lisbon, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, TU Lisbon, Avenida Rovisco Pais, 1049-001 Lisbon, Portugal
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Lasri J, da Silva MFCG, Kopylovich MN, Mukhopadhyay S, Charmier MAJ, Pombeiro AJL. PdII-promoted [2 + 3] cycloaddition of pyrroline N-oxide to organonitriles. Application of (Δ4-1,2,4-oxadiazoline)-PdII complexes in the Suzuki–Miyaura reaction. Dalton Trans 2009:2210-6. [DOI: 10.1039/b813996b] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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20
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Kopylovich MN, Lasri J, Guedes da Silva MFC, Pombeiro AJL. Single-pot template transformations of cyanopyridines on a PdII centre: syntheses of ketoimine and 2,4-dipyridyl-1,3,5-triazapentadiene palladium(II) complexes and their catalytic activity for microwave-assisted Suzuki–Miyaura and Heck reactions. Dalton Trans 2009:3074-84. [DOI: 10.1039/b820680e] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Lasri J, Kopylovich M, Guedes da Silva M, Charmier M, Pombeiro A. Metal-Free and PdII-Promoted [2+3] Cycloadditions of a Cyclic Nitrone to Phthalonitriles: Syntheses of Oxadiazolines as well as Phthalamide-PdIIand Dihydropyrrolyl-iminoisoindolinone-PdIIComplexes with High Catalytic Activity in Suzuki-Miyaura Cross-Coupling Reactions. Chemistry 2008; 14:9312-22. [DOI: 10.1002/chem.200800510] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Lasri J, Guedes da Silva MFC, Charmier MAJ, Pombeiro AJL. Optically Active Mixed Unsymmetric Imine Platinum(II) Complexes - Utilization of the Liberated Imines for Further Syntheses of Mixed Imine-Diazadiene Complexes and of (E)-Cyanoalkenes. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800343] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kuznetsov ML, Kukushkin VY, Pombeiro AJL. Reactivity of Pt- and Pd-bound nitriles towards nitrile oxides and nitrones: substitution vs. cycloaddition. Dalton Trans 2008:1312-22. [PMID: 18305843 DOI: 10.1039/b713425h] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Reactions of the nitrone CH3CH=N(CH3)O and the nitrile oxide CH3C[triple bond]NO with the nitrile complexes trans-[MCl2(N[triple bond]CCH3)2] (M = Pt, 1; Pd, 2) were investigated by theoretical methods at B3LYP and, for some processes, CCSD(T) levels of theory. The mechanisms of substitutions and cycloadditions were studied in detail. The former occur via a concerted asynchronous mechanism of dissociative type. The calculations of the metal-ligand bond energies in the starting complexes and substitution products and the analysis of structural features of the transition states indicate that the M-N bond dissociation (rather than M-O bond formation) is the step, which controls the reactivity of and in substitutions. The different chemical behaviours of the Pt and Pd complexes towards the 1,3-dipoles were investigated. The exclusive isolation of cycloaddition rather than substitution products in any solvents in the case of is both kinetically and thermodynamically controlled. The switch of the reaction mode from cycloaddition to substitution for 2 in CH2Cl2 solution is caused by the significantly lower Pd-N bond energy in comparison with the Pt-N bond energy, consistent with the higher lability of the Pd complexes. The different chemical behaviour of 2 in CH3CN and CH2Cl2 solvents is accounted for by the great excess of acetonitrile in the CH3CN solution rather than a different solvation character. The relative variation of Wiberg bond indices along the reaction path is proposed as a quantitative criterion for the classification of the reaction mechanism.
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Affiliation(s)
- Maxim L Kuznetsov
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, TU Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal.
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Sarju J, Arbour J, Sayer J, Rohrmoser B, Scherer W, Wagner G. Synthesis and characterisation of mixed ligand Pt(ii) and Pt(iv) oxadiazoline complexes. Dalton Trans 2008:5302-12. [DOI: 10.1039/b807410k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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25
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Mukhopadhyay S, Lasri J, Januário Charmier MA, Guedes da Silva MFC, Pombeiro AJL. Microwave synthesis of mono- and bis-tetrazolato complexes via 1,3-dipolar cycloaddition of organonitriles with platinum(ii)-bound azides. Dalton Trans 2007:5297-304. [DOI: 10.1039/b709959b] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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