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Chandra A, Basu P, Raha S, Dhibar P, Bhattacharya S. Development of ruthenium complexes with S-donor ligands for application in synthesis, catalytic acceptorless alcohol dehydrogenation and crossed-aldol condensation. Dalton Trans 2024; 53:10675-10685. [PMID: 38860941 DOI: 10.1039/d4dt00985a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
The reaction of [Ru(dmso)4Cl2] with a potassium salt of four xanthate (RO-C(S)S-; R = Me, Et, iPr and tBu) ligands (depicted as Ln; n = 1-4) in hot methanol afforded a group of mixed-ligand complexes of type [Ru(Ln)2(dmso)2]. The crystal structures of all the four complexes have been determined, which show that the xanthate ligands are bound to the metal center forming four-membered chelates and dmso is coordinated through sulfur and they are mutually cis. The relative thermodynamic stability of this cis and the other possible trans-isomers of these complexes has been assessed with the help of DFT calculations, which have revealed that the cis-isomer is the more stable isomer. The coordinated dmso in the [Ru(Ln)2(dmso)2] complexes could be easily displaced by chelating bidentate ligands (depicted as L') to furnish complexes of type [Ru(Ln)2(L')], as demonstrated through isolation of two such complexes, viz. [Ru(L3)2(bpy)] and [Ru(L2)2(phen)] (bpy = 2,2'-bipyridine and phen = 1,10-phenanthroline). The crystal structure of [Ru(L3)2(bpy)] has been determined and the structure of [Ru(L2)2(phen)] has been optimized by the DFT method. The electronic spectra of the four [Ru(Ln)2(dmso)2] complexes and the two derivatives ([Ru(Ln)2(L')]; n = 3, L' = bpy; n = 2, L' = phen), recorded in dichloromethane solutions, show intense absorptions spanning the visible and ultraviolet regions, which have been analyzed by the TDDFT method. The [Ru(Ln)2(dmso)2] complexes are found to serve as efficient catalyst precursors for the acceptorless dehydrogenation of 2-propanol followed by crossed-aldol condensation with substituted benzaldehydes (and related aldehydes), using tert-butoxide as the co-catalyst, producing dibenzylideneacetone derivatives in good yields.
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Affiliation(s)
- Anushri Chandra
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata - 700032, India.
| | - Pousali Basu
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata - 700032, India.
| | - Shreya Raha
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata - 700032, India.
| | - Papu Dhibar
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata - 700032, India.
- Department of Chemistry, Brainware University, Kolkata 700 125, India
| | - Samaresh Bhattacharya
- Department of Chemistry, Inorganic Chemistry Section, Jadavpur University, Kolkata - 700032, India.
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2
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Stepanenko I, Zalibera M, Schaniel D, Telser J, Arion V. Ruthenium-nitrosyl complexes as NO-releasing molecules and potential anticancer drugs. Dalton Trans 2022; 51:5367-5393. [DOI: 10.1039/d2dt00290f] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of new types of mono- and polynuclear ruthenium nitrosyl complexes is driving progress in the field of NO generation for a variety of applications. Light-induced Ru-NO bond dissociation...
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3
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Vidal A, Battistin F, Balducci G, Iengo E, Alessio E. A Flexible Synthetic Strategy for the Preparation of Heteroleptic Metallacycles of Porphyrins. Inorg Chem 2021; 60:11503-11513. [PMID: 34264053 PMCID: PMC8389808 DOI: 10.1021/acs.inorgchem.1c01511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a stepwise synthetic strategy for the preparation of the unprecedented heteroleptic 2+2 neutral metallacycle [{t,c,c-RuCl2(CO)2}2(4'cisDPyP)(3'cisDPyP)] (5), in which two different 5,10-meso-dipyridylporphyrins, 4'cisDPyP [i.e., 5,10-bis(4'-pyridyl)-15,20-diphenylporphyrin] and 3'cisDPyP [i.e., 5,10-bis(3'-pyridyl)-15,20-diphenylporphyrin], are joined through equal 90°-angular Ru(II) connectors. The synthesis of 5 was accomplished through the preparation of a reactive ditopic intermediate in which one of the two pyridylporphyrins is linked to two neutral ruthenium fragments, each having one residual readily available coordination site (a dmso-O). Thus, compound 5 was obtained under mild conditions through two complementary routes: either by treatment of [{t,c,c-RuCl2(CO)2(dmso-O)}2(4'cisDPyP)] (3) with 1 equiv of 3'cisDPyP or, alternatively, by treatment of [{t,c,c-RuCl2(CO)2(dmso-O)}2(3'cisDPyP)] (4) with 1 equiv of 4'cisDPyP. Heteroleptic metallacycle 5 was isolated in pure form in acceptable yield and fully characterized. Spectroscopic data and a molecular model show that 5 has an L-shaped geometry, with the two porphyrins almost orthogonal to one another. The modular approach that we established is highly flexible and opens the way to several possible exciting developments.
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Affiliation(s)
- Alessio Vidal
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Federica Battistin
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Gabriele Balducci
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Elisabetta Iengo
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Enzo Alessio
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
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4
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Vidal A, Calligaro R, Gasser G, Alberto R, Balducci G, Alessio E. cis-Locked Ru(II)-DMSO Precursors for the Microwave-Assisted Synthesis of Bis-Heteroleptic Polypyridyl Compounds. Inorg Chem 2021; 60:7180-7195. [PMID: 33908778 PMCID: PMC8154425 DOI: 10.1021/acs.inorgchem.1c00240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
We describe a synthetic
strategy for the preparation of bis-heteroleptic
polypyridyl Ru(II) complexes of the type [Ru(L1)2(L2)]2+ (L1 and L2 = diimine ligands) from well-defined Ru(II) precursors.
For this purpose, a series of six neutral, anionic, and cationic cis-locked Ru(II)-DMSO complexes (2–7) of the general formula [Y] fac-[RuX(DMSO–S)3(O–O)]n (where O–O
is a symmetrical chelating anion: oxalate (ox), malonate (mal), acetylacetonate
(acac); X = DMSO–O or Cl–; n = −1/0/+1 depending on the nature and charge of X and O–O;
when present, Y = K+ or PF6–) were efficiently prepared from the well-known cis-[RuCl2(DMSO)4] (1). When treated
with diimine chelating ligands (L1 = bpy, phen, dpphen), the compounds 2–7 afforded the target [Ru(L1)2(O–O)]0/+ complex together with the undesired (and
unexpected) [Ru(L1)3]2+ species. Nevertheless,
we found that the formation of [Ru(L1)3]2+can
be minimized by carefully adjusting the reaction conditions: in particular,
high selectivity toward [Ru(L1)2(O–O)]0/+ and almost complete conversion of the precursor was obtained within
minutes, also on a 100–200 mg scale, when the reactions were
performed in absolute ethanol at 150 °C in a microwave reactor.
Depending on the nature of L1 and concentration, with the oxalate
and malonate precursors, the neutral product [Ru(L1)2(O–O)]
can precipitate spontaneously from the final mixture, in pure form
and acceptable-to-good yields. When spontaneous precipitation of the
disubstituted product does not occur, purification from [Ru(L1)3]2+ can be rather easily accomplished by column
chromatography or solvent extraction. By comparison, under the same
conditions, compound 1 is much less selective, thus demonstrating
that locking the geometry of the precursor through the introduction
of O–O in the coordination sphere of Ru is a valid strategic
approach. By virtue of its proton-sensitive nature, facile and quantitative
replacement of O–O in [Ru(L1)2(O–O)]0/+ by L2, selectively affording [Ru(L1)2(L2)]2+, was accomplished in refluxing ethanol in the presence of
a slight excess of trifluoroacetic acid or HPF6. cis-Locked Ru(II)-DMSO
complexes bearing
a symmetrical chelating anion, such as [K] fac-[RuCl(DMSO−S)3(η2-mal)] (2), are suitable
precursors for the two-step selective preparation of bis-heteroleptic
polypyridyl compounds of the type [Ru(L1)2(L2)]2+ (L1 and L2 = diimine ligands).
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Affiliation(s)
- Alessio Vidal
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Rudy Calligaro
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Gilles Gasser
- Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemistry, 75005 Paris, France
| | - Roger Alberto
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Gabriele Balducci
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Enzo Alessio
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
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5
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Pettinari R, Marchetti F, Tombesi A, Duan F, Zhou L, Messori L, Giacomelli C, Marchetti L, Trincavelli ML, Marzo T, La Mendola D, Balducci G, Alessio E. Ruthenium(II) 1,4,7-trithiacyclononane complexes of curcumin and bisdemethoxycurcumin: Synthesis, characterization, and biological activity. J Inorg Biochem 2021; 218:111387. [PMID: 33721720 DOI: 10.1016/j.jinorgbio.2021.111387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/21/2021] [Accepted: 02/02/2021] [Indexed: 12/29/2022]
Abstract
Two cationic ruthenium(II) 1,4,7-trithiacyclononane ([9]aneS3) complexes of curcumin (curcH) and bisdemethoxycurcumin (bdcurcH), namely [Ru(curc)(dmso-S)([9]aneS3)]Cl (1) and [Ru(bdcurc)(dmso-S)([9]aneS3)]Cl (2) were prepared from the [RuCl2(dmso-S)([9]-aneS3)] precursor and structurally characterized, both in solution and in the solid state by X-ray crystallography. The corresponding PTA complexes [Ru(curc)(PTA)([9]aneS3)]Cl (3) and [Ru(bdcurc)(PTA)([9]aneS3)]Cl (4) have been also synthesized and characterized (PTA = 1,3,5-triaza-7-phosphaadamantane). Bioinorganic studies relying on mass spectrometry were performed on complexes 1-4 to assess their interactions with the model protein lysozyme. Overall, a rather limited reactivity with lysozyme was highlighted accompanied by a modest cytotoxic potency against three representative cancer cell lines. The moderate pharmacological activity is likely connected to the relatively high stability of these complexes.
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Affiliation(s)
- Riccardo Pettinari
- School of Pharmacy, University of Camerino, Via S. Agostino 1, 62032 Camerino, MC, Italy.
| | - Fabio Marchetti
- School of Science and Technology, University of Camerino, Via S. Agostino 1, 62032 Camerino, MC, Italy
| | - Alessia Tombesi
- School of Science and Technology, University of Camerino, Via S. Agostino 1, 62032 Camerino, MC, Italy
| | - Fenghe Duan
- School of Pharmacy, University of Camerino, Via S. Agostino 1, 62032 Camerino, MC, Italy
| | - Liming Zhou
- Henan Provincial Key Laboratory of Surface and Interface Science, Zhengzhou University of Light Industry, Zhengzhou, 450002, PR China
| | - Luigi Messori
- Department of Chemistry, University of Florence, Via della Lastruccia 3-13, Sesto Fiorentino, Florence, Italy
| | - Chiara Giacomelli
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126, Pisa, Italy
| | - Laura Marchetti
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126, Pisa, Italy
| | | | - Tiziano Marzo
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126, Pisa, Italy
| | - Diego La Mendola
- Department of Pharmacy, University of Pisa, Via Bonanno Pisano, 6, 56126, Pisa, Italy
| | - Gabriele Balducci
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, Trieste, Italy
| | - Enzo Alessio
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, Trieste, Italy
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6
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Weinstain R, Slanina T, Kand D, Klán P. Visible-to-NIR-Light Activated Release: From Small Molecules to Nanomaterials. Chem Rev 2020; 120:13135-13272. [PMID: 33125209 PMCID: PMC7833475 DOI: 10.1021/acs.chemrev.0c00663] [Citation(s) in RCA: 256] [Impact Index Per Article: 64.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Indexed: 02/08/2023]
Abstract
Photoactivatable (alternatively, photoremovable, photoreleasable, or photocleavable) protecting groups (PPGs), also known as caged or photocaged compounds, are used to enable non-invasive spatiotemporal photochemical control over the release of species of interest. Recent years have seen the development of PPGs activatable by biologically and chemically benign visible and near-infrared (NIR) light. These long-wavelength-absorbing moieties expand the applicability of this powerful method and its accessibility to non-specialist users. This review comprehensively covers organic and transition metal-containing photoactivatable compounds (complexes) that absorb in the visible- and NIR-range to release various leaving groups and gasotransmitters (carbon monoxide, nitric oxide, and hydrogen sulfide). The text also covers visible- and NIR-light-induced photosensitized release using molecular sensitizers, quantum dots, and upconversion and second-harmonic nanoparticles, as well as release via photodynamic (photooxygenation by singlet oxygen) and photothermal effects. Release from photoactivatable polymers, micelles, vesicles, and photoswitches, along with the related emerging field of photopharmacology, is discussed at the end of the review.
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Affiliation(s)
- Roy Weinstain
- School
of Plant Sciences and Food Security, Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv 6997801, Israel
| | - Tomáš Slanina
- Institute
of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Dnyaneshwar Kand
- School
of Plant Sciences and Food Security, Faculty of Life Sciences, Tel-Aviv University, Tel-Aviv 6997801, Israel
| | - Petr Klán
- Department
of Chemistry and RECETOX, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
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7
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Sousa LM, Araújo DMS, Oliveira KM, De Oliveira LP, Maia PIS, Deflon VM, Batista AA, Machado AEH, Guerra W, Von Poelhsitz G. Synthesis, spectroscopic characterization and computational study of Ru(II)/DMSO complexes with monocoordinated carbazate ligands. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1777286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Luana M. Sousa
- Instituto de Química, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
| | | | - Katia M. Oliveira
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | | | - Pedro I. S. Maia
- Departamento de Química, Universidade Federal do Triângulo Mineiro, Uberaba, MG, Brazil
| | - Victor M. Deflon
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | - Alzir A. Batista
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - Antônio E. H. Machado
- Instituto de Química, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
- Programa de Pós-Graduação em Ciências Exatas e Tecnológicas Unidade Acadêmica Especial de Física, Universidade Federal de Catalão, Catalão, GO, Brazil
| | - Wendell Guerra
- Instituto de Química, Universidade Federal de Uberlândia, Uberlândia, MG, Brazil
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8
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Ternes VA, Morgan HA, Lanquist AP, Murray MJ, Wile BM. Ruthenium (II) complexes bearing thioether‐appended α‐iminopyridine ligands: Arene precursors permit access to κ
2
‐N,N and κ
3
‐N,N,S complexes. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Victoria A. Ternes
- Donald J. Bettinger Department of Chemistry and BiochemistryOhio Northern University 525 South Main Street Ada OH 45810 USA
| | - Hannah A. Morgan
- Donald J. Bettinger Department of Chemistry and BiochemistryOhio Northern University 525 South Main Street Ada OH 45810 USA
| | - Austin P. Lanquist
- Donald J. Bettinger Department of Chemistry and BiochemistryOhio Northern University 525 South Main Street Ada OH 45810 USA
| | - Michael J. Murray
- Donald J. Bettinger Department of Chemistry and BiochemistryOhio Northern University 525 South Main Street Ada OH 45810 USA
| | - Bradley M. Wile
- Donald J. Bettinger Department of Chemistry and BiochemistryOhio Northern University 525 South Main Street Ada OH 45810 USA
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9
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Rudnitskaya OV, Dobrokhotova EV, Kultyshkina EK, Tereshina TA, Trigub AL, Zubavichus YV, Khrustalev VN. Osmium(IV) Halide Complexes with Dimethyl Sulfoxide[H(dmso)
2
][OsX
5
(dmso‐κ
O
)], X=Cl, Br: Synthesis, Structure, and Properties. ChemistrySelect 2020. [DOI: 10.1002/slct.201904109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Olga V. Rudnitskaya
- Department of Inorganic ChemistryPeoples' Friendship University of Russia (RUDN University) Miklukho-Maklay St., 6 Moscow 117198 Russia
| | - Ekaterina V. Dobrokhotova
- Department of Inorganic ChemistryPeoples' Friendship University of Russia (RUDN University) Miklukho-Maklay St., 6 Moscow 117198 Russia
| | - Ekaterina K. Kultyshkina
- Department of Inorganic ChemistryPeoples' Friendship University of Russia (RUDN University) Miklukho-Maklay St., 6 Moscow 117198 Russia
| | - Tatiana A. Tereshina
- Department of Inorganic ChemistryPeoples' Friendship University of Russia (RUDN University) Miklukho-Maklay St., 6 Moscow 117198 Russia
| | - Alexander L. Trigub
- National Research Center“Kurchatov Institute” Acad. Kurchatov Sq., 1 Moscow 123182 Russia
| | - Yan V. Zubavichus
- Boreskov Institute of Catalysis SB RAS Lavrentiev Ave. 5 Novosibirsk 630090 Russia
| | - Victor N. Khrustalev
- Department of Inorganic ChemistryPeoples' Friendship University of Russia (RUDN University) Miklukho-Maklay St., 6 Moscow 117198 Russia
- Zelinsky Institute of Organic Chemistry RAS Leninsky Prosp. 47 119991 Moscow Russia
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10
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Toyama M, Takizawa T, Morita I, Nagao N, Kuramochi Y, Ishida H. Syntheses and Characterization of a Pair of Isomers of Heteroleptic Bis(Bidentate) Ruthenium(II) Complexes with Two Different Monodentate Ligands. Chemistry 2019; 25:16582-16590. [PMID: 31596008 DOI: 10.1002/chem.201903706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/18/2019] [Indexed: 01/24/2023]
Abstract
Two isomers of heteroleptic bis(bidentate) ruthenium(II) complexes with dimethyl sulfoxide (dmso) and chloride ligands, trans(Cl,Nbpy )- and trans(Cl,NHdpa )-[Ru(bpy)Cl(dmso-S)(Hdpa)]+ (bpy: 2,2'-bipyridine; Hdpa: di-2-pyridylamine), are synthesized. This is the first report on the selective synthesis of a pair of isomers of cis-[Ru(L)(L')XY]n+ (L≠L': bidentate ligands; X≠Y: monodentate ligands). The structures of the ruthenium(II) complexes are clarified by means of X-ray crystallography, and the signals in the 1 H NMR spectra are assigned based on 1 H-1 H COSY spectra. The colors of the two isomers are clearly different in both the solid state and solution: the trans(Cl,Nbpy ) isomer has a deep red color, whereas the trans(Cl,NHdpa ) isomer is yellow. Although both complexes have intense absorption bands at λ≈440-450 nm, only the trans(Cl,Nbpy ) isomer has a shoulder band at λ≈550 nm. DFT calculations indicate that the LUMOs of both isomers are the π* orbitals in the bpy ligand, and that the LUMO level of the trans(Cl,Nbpy ) isomer is lower than that of the trans(Cl,NHdpa ) isomer due to the trans effect of the Cl ligand; thus resulting in the appearance of the shoulder band. The HOMO levels are almost the same in both isomers. The energy levels are experimentally supported by cyclic voltammograms, in which these isomers have different reduction potentials and similar oxidation potentials.
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Affiliation(s)
- Mari Toyama
- Current address: Osaka Prefecture University College of Technology, 26-12 Saiwaicho, Neyagawa, Osaka, 572-8572, Japan.,Department of Chemistry of Functional Molecules, Faculty of Science and Engineering, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, 658-8501, Japan.,Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashi-Mita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan
| | - Takako Takizawa
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashi-Mita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan
| | - Itaru Morita
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashi-Mita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan
| | - Noriharu Nagao
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashi-Mita, Tama-ku, Kawasaki, Kanagawa, 214-8571, Japan
| | - Yusuke Kuramochi
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan.,Current address: Department of Chemistry, Faculty of Science Division II, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Hitoshi Ishida
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Sagamihara, Kanagawa, 252-0373, Japan
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11
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Martins DM, Maia PIS, Carvalho‐Jr VP, Lima‐Neto BS. Cooperative Effects of Aniline with DMSO in Ru
II
Complexes: Tuning the Reactivity for Ring‐Opening Metathesis Polymerization. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900887] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Daniele M. Martins
- Instituto de Química de São Carlos Universidade de São Paulo 13560‐970 São Carlos SP Brazil
| | - Pedro I. S. Maia
- Departamento de Química Universidade Federal do Triângulo Mineiro 38025‐440 Uberaba MG Brazil
| | - Valdemiro P. Carvalho‐Jr
- Faculdade de Ciências e Tecnologia UNESP Univ. Estadual Paulista 19060‐900 Presidente Prudente SP Brazil
| | - Benedito S. Lima‐Neto
- Instituto de Química de São Carlos Universidade de São Paulo 13560‐970 São Carlos SP Brazil
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12
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Vidal A, Battistin F, Balducci G, Demitri N, Iengo E, Alessio E. Rare Example of Stereoisomeric 2 + 2 Metallacycles of Porphyrins Featuring Chiral-at-Metal Octahedral Ruthenium Corners. Inorg Chem 2019; 58:7357-7367. [PMID: 31090413 DOI: 10.1021/acs.inorgchem.9b00487] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In this paper, we describe three new stereoisomers of the already known 2 + 2 metallacycle of porphyrins [ trans, cis, cis-RuCl2(CO)2(4' cisDPyP)]2 (2, 4' cisDPyP = 5,10-bis(4'-pyridyl)-15,20-diphenylporphyrin), namely [{ trans,cis,cis-RuCl2(CO)2}(4' cisDPyP)2{ cis,cis,cis-RuCl2(CO)2}] (14) and [ cis,cis,cis-RuCl2(CO)2(4' cisDPyP)]2 (15), in which the chiral { cis,cis,cis-RuCl2(CO)2} fragment has either a C or A handedness. The least abundant 15 exists as a mixture of two stereoisomers defined as alternate (15alt, both porphyrins are trans to a Cl and a CO) and pairwise (15pw, one porphyrin is trans to two chlorides and the other to two carbonyls), each one as a statistical mixture of meso ( AC) and racemic ( AA and CC) diastereomers. Remarkably, both 14 and 15 are-to the best of our knowledge-unprecedented examples of 2D metallacycles with octahedral chiral-at-metal connectors, and 14 is the first example of a 2 + 2 molecular square with stereoisomeric Ru(II) corners. Whereas 2 is selectively obtained by treatment of trans,cis,cis-RuCl2(CO)2(dmso-O)2 (1) with 4' cisDPyP, 14 and 15 were obtained, together with 2 (major product), using stereoisomers of 1, either cis,cis,trans-RuCl2(CO)2(dmso-S)2 (5) or cis,cis,cis-RuCl2(CO)2(dmso)2 (6), as precursors. From a general point of view, this work demonstrates that-even for the smallest 2 + 2 metallacycle and using a symmetric organic linker-several stereoisomers can be generated when using octahedral metal connectors of the type {MA2B2} that are not stereochemically rigid. As a proof-of-concept, it also opens the way to new-even though challenging-opportunities: unprecedented and yet unexplored chiral metallosupramolecular assemblies can be obtained and eventually exploited (e.g., for supramolecular catalysis) by using stereogenic octahedral metal connectors amenable to become chiral centers.
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Affiliation(s)
- Alessio Vidal
- Department of Chemical and Pharmaceutical Sciences , University of Trieste , Via L. Giorgieri 1 , 34127 Trieste , Italy
| | - Federica Battistin
- Department of Chemical and Pharmaceutical Sciences , University of Trieste , Via L. Giorgieri 1 , 34127 Trieste , Italy
| | - Gabriele Balducci
- Department of Chemical and Pharmaceutical Sciences , University of Trieste , Via L. Giorgieri 1 , 34127 Trieste , Italy
| | - Nicola Demitri
- Elettra - Synchrotron Light Source , S.S. 14 Km 163.5, Area Science Park , 34149 Basovizza, Trieste , Italy
| | - Elisabetta Iengo
- Department of Chemical and Pharmaceutical Sciences , University of Trieste , Via L. Giorgieri 1 , 34127 Trieste , Italy
| | - Enzo Alessio
- Department of Chemical and Pharmaceutical Sciences , University of Trieste , Via L. Giorgieri 1 , 34127 Trieste , Italy
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Johns AM, Fiamengo BA, Herron JR, Bourg JB, Doppiu A, Karch R, Pederson RL. cis-Dichloro Sulfoxide Ligated Ruthenium Metathesis Precatalysts. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00895] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Adam M. Johns
- Materia, Inc., Pasadena, California 91107, United States
| | | | | | - Jean-Baptiste Bourg
- Materia, Inc., Pasadena, California 91107, United States
- Umicore AG & Co. KG, Rodenbacher Chaussee 4, D-63457 Hanau-Wolfgang, Germany
| | - Angelino Doppiu
- Umicore AG & Co. KG, Rodenbacher Chaussee 4, D-63457 Hanau-Wolfgang, Germany
| | - Ralf Karch
- Umicore AG & Co. KG, Rodenbacher Chaussee 4, D-63457 Hanau-Wolfgang, Germany
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14
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Battistin F, Siegmund D, Balducci G, Alessio E, Metzler-Nolte N. Ru(ii)-Peptide bioconjugates with the cppH linker (cppH = 2-(2'-pyridyl)pyrimidine-4-carboxylic acid): synthesis, structural characterization, and different stereochemical features between organic and aqueous solvents. Dalton Trans 2019; 48:400-414. [PMID: 30285015 DOI: 10.1039/c8dt03575j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Three new Ru(ii) bioconjugates with the C-terminal hexapeptide sequence of neurotensin, RRPYIL, namely trans,cis-RuCl2(CO)2(cppH-RRPYIL-κNp) (7), [Ru([9]aneS3)(cppH-RRPYIL-κNp)(PTA)](Cl)2 (8), and [Ru([9]aneS3)Cl(cppH-RRPYIL-κNp)]Cl (11), where cppH is the asymmetric linker 2-(2'-pyridyl)pyrimidine-4-carboxylic acid, were prepared in pure form and structurally characterized in solution. The cppH linker is capable of forming stereoisomers (i.e. linkage isomers), depending on whether the nitrogen atom ortho (No) or para (Np) to the carboxylate on C4 in the pyrimidine ring binds the metal ion. Thus, one of the aims of this work was to obtain pairs of stereoisomeric conjugates and investigate their biological (anticancer, antibacterial) activity. A thorough NMR characterization clearly indicated that in all cases exclusively Np conjugates were obtained in pure form. In addition, the NMR studies showed that, whereas in DMSO-d6 each conjugate exists as a single species, in D2O two (7) or even three if not four (8 and 11) very similar stable species form (each one corresponding to an individual compound). Similar results were observed for the cppH-RRPYIL ligand alone. Overall, the NMR findings are consistent with the occurrence of a strong intramolecular stacking interaction between the phenol ring of tyrosine and the pyridyl ring of cppH. Such stacking interactions between aromatic rings are expected to be stronger in water. This interaction leads to two stereoisomeric species in the free cppH-RRPYIL ligand and in the bioconjugate 7, and is somehow modulated by the less symmetrical Ru coordination environments in 8 and 11, affording three to four very similar species.
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Affiliation(s)
- Federica Battistin
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via Giorgieri 1, 34127 Trieste, Italy.
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