1
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Abstract
A strategy for the elaboration of a halogen-bonded porphyrin network with nano-sized tubular channels is reported.
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2
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Topological Versatility of Oxalate-Based Bimetallic One-Dimensional (1D) Compounds Associated with Ammonium Cations. Inorg Chem 2012; 51:11582-93. [DOI: 10.1021/ic3014915] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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3
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Multiferroics by Rational Design: Implementing Ferroelectricity in Molecule-Based Magnets. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202848] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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4
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Multiferroics by Rational Design: Implementing Ferroelectricity in Molecule-Based Magnets. Angew Chem Int Ed Engl 2012; 51:8356-60. [DOI: 10.1002/anie.201202848] [Citation(s) in RCA: 152] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Revised: 06/22/2012] [Indexed: 11/10/2022]
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5
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Connecting ruthenium substituted Keggin-type tungstophosphates by oxotungstic bridges: Evidence for the steric effect of {RuL3}2+ (L3=η6-arene, (DMSO)3) fragments. CR CHIM 2012. [DOI: 10.1016/j.crci.2011.08.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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6
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High Proton Conduction in a Chiral Ferromagnetic Metal–Organic Quartz-like Framework. J Am Chem Soc 2011; 133:15328-31. [DOI: 10.1021/ja206917z] [Citation(s) in RCA: 277] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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7
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Versatile host–guest chemistry and networking ability of the cyclic tungstophosphate {P8W48}: Two further manganese derivatives. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.03.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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8
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Design of 1D and 2D molecule-based magnets with the ligand 4,5-dimethyl-1,2-phenylenebis(oxamato). Dalton Trans 2011; 40:746-54. [DOI: 10.1039/c0dt00796j] [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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9
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N-substituted [phenyl-pyrazolo]-oxazin-2-thiones as COX-LOX inhibitors: influence of the replacement of the oxo -group with thioxo- group on the COX inhibition activity of N-substituted pyrazolo-oxazin-2-ones. ARKIVOC 2010. [DOI: 10.3998/ark.5550190.0012.206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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10
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Aryldiazenido derivatives: A new entry to the functionalization of Keggin polyoxometalates. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.06.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Electroactive Benzothiazole Hydrazones and Their [Mo6O19]2− Derivatives: Promising Building Blocks for Conducting Molecular Materials. Chemistry 2010; 16:8390-9. [DOI: 10.1002/chem.201000427] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Synthesis, crystal structure and magnetic properties of two oxalato-bridged dimetallic trinuclear complexes combined with a polar cation. Dalton Trans 2010; 39:4951-8. [PMID: 20419225 DOI: 10.1039/c002468f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Barium one-dimensional coordination polymers from barium β-diketonates and 2,2′-bipyrimidine derivatives. CrystEngComm 2010. [DOI: 10.1039/c0ce00076k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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A new family of oxime-based hexanuclear manganese(iii) single molecule magnets with high anisotropy energy barriers. Chem Commun (Camb) 2010; 46:5106-8. [DOI: 10.1039/c0cc00485e] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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An Unprecedented Trinuclear Dawson Sandwich Complex with Internal Lacuna: Synthesis and31P NMR Spectroscopic Analysis of the Symmetrical [NaNi3(H2O)2(P2W15O56)2]17���and [CoNi3(H2O)2(P2W15O56)2]16���Anions. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900738] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Structure of di(salicylaldehyde benzoylhydrazonato) zinc (II), an unusual staircase polymeric structure formed via E → Z isomerization on complexation. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zkri.216.10.556.20370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
A bicomplex of salicylaldehyde benzoylhydrazone (SBH) with Zn(II) was synthesized in ethanol and single crystals were obtained in DMSO. The compound crystallizes in the orthorhombic system with the space group Pna21(33) and crystal data: a = 22.573(3)Å, b = 6.1208(5) Å, c = 17.881(2) Å, V = 2470.5(5) Å3, Z = 4, d(calc) = 1.462 g⋅cm–3, (2633 reflections with I > 2 σ(I); final R = 0.0509; R
w = 0.1099). The asymmetric unit is a nearly planar bicomplex built up from one Zn atom linked to two monodeprotonated SBH ligands. The compound can be described as formed of chains extended along the b axis. This linear polymeric character results from the linking of each asymmetric unit to two neighbouring ones via four (2x2) covalent Zn-O bonds involving three Zn atoms and four phenolic oxygens. These covalent bonds are related to the very unusual Z configuration of the ligand. The three-dimensional cohesion of the compound is obtained by van der Waals forces be-tween the polymeric chains.
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17
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Experimental and Computational Study of the Framework Fluxionality of Organometallic Derivatives of Polyoxometalates: Analysis of the Effect of the Metal and of the Solvent. Organometallics 2009. [DOI: 10.1021/om8011568] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Palladium(II) Phosphotungstate Derivatives: Synthesis and Characterization of the [Pdx{WO(H2O)}3-x{A,α-PW9O34}2](6+2x)- Anions. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200800727] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Synthesis and Spectroscopic Characterization of Organophosphono Derivatives of Lindqvist Niobotungstates - X-ray Crystal Structures of (nBu4N)3[NbW10O38(RP)2] (R =nBu, Hep and Ph). Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800235] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Sn12O8(OH)4(OEt)28(HOEt)4: an Additional Member in the Family of Dodecameric Oxo Clusters. Inorg Chem 2008; 47:5831-40. [DOI: 10.1021/ic800123z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Hydrothermal Synthesis and Structural Characterization of the High‐Valent Ruthenium‐Containing Polyoxoanion [{PW
11
O
39
}
2
{(HO)Ru
IV
–O–Ru
IV
(OH)}]
10–
(Eur. J. Inorg. Chem. 13/2008). Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200890032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Hydrothermal Synthesis and Structural Characterization of the High-Valent Ruthenium-Containing Polyoxoanion [{PW11O39}2{(HO)RuIV–O–RuIV(OH)}]10–. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200701359] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Imidazole-Substituted Oxoverdazyl Radical As a Mediator of Intramolecular and Intermolecular Exchange Interaction. Inorg Chem 2008; 47:2396-403. [DOI: 10.1021/ic701400b] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Modulating the Framework Negative Charge Density in the System [BDT−TTP•+]/[Re6S5Cl91-]/[Re6(S/Se)6Cl82-]/[Re6S7Cl73-]: Templating by Isosteric Cluster Anions of Identical Symmetry and Shape, Variations of Incommensurate Band Filling, and Electronic Structure in 2D Metals. J Am Chem Soc 2008; 130:3335-48. [DOI: 10.1021/ja074774s] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Square-planar and trigonal prismatic silver(I) in bipyrimidine and oxalate bridged tetranuclear complexes and one-dimensional compounds: Synthesis and crystal structures. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.06.023] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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26
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Synthesis of the Electron-Poor Dicationic Arene Complex [Cp*Ir(η6-p-bis(difluoromethyl)benzene)][BF4]2 and Ring Attack by Hydroxide in Attempted Deprotonation: Synthesis, Structures, and C−H···F Hydrogen Bonding. Organometallics 2007. [DOI: 10.1021/om700760y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Supramolecular Cobalt Cages and Coordination Polymers Templated by Anion Guests: Self-Assembly, Structures, and Magnetic Properties. Chemistry 2007; 13:5401-7. [PMID: 17361971 DOI: 10.1002/chem.200700265] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
We report the anion-templated syntheses of a variety of supramolecular assemblies of Co(II). Remarkably in the presence of a weakly coordinating ion such as BF(4) (-), a discrete three-dimensional cage [BF(4) subset(BF(4))(2)Co(2)(L(1))(4)][BF(4)] (2) is formed with three coordinated BF(4) (-) ions, a rare example in supramolecular chemistry (L(1)=di(benzimidazole)-1,4-phenylene). Switching to stronger coordinating ions, such as NO(3) (-) or Cl(-), a one-dimensional coordination polymer [[Co(L(1))(NO(3))(2)](n)] (3) and a metallomacrocycle [Co(2)(L(1))(2)(Cl)(4)] (5) were formed, respectively. These results illustrate the powerful effect of the anion-templating chemistry. Finally the magnetic properties of these assemblies 1 b, 2, 3, and 5 are presented and discussed.
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28
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ortho- andpara-Thioquinonoid π-Complexes: First Synthesis, Reactivity, and Crystal Structure Determination. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200600956] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Synthesis and Characterization of the Keggin-Type Ruthenium-Nitrido Derivative [PW11O39{RuN}]4- and Evidence of Its Electrophilic Reactivity. J Am Chem Soc 2007; 129:7127-35. [PMID: 17497865 DOI: 10.1021/ja071137t] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The ruthenium-nitrido POM derivative [PW11O39{RuVIN}]4- has been synthesized by reaction between [PW11O39]7- and [RuVINCl5]2- or [RuVINCl4]-. Its molecular structure has been confirmed from multinuclear 31P and 183W NMR spectroscopy together with an EXAFS study, while the oxidation state of the ruthenium bearing the nitrido ligand has been inferred both from 183W NMR and XANES analysis at the Ru-K edge. The potential of [PW11O39{RuVIN}]4- in N-atom transfer reactions has been demonstrated through reaction with triphenylphosphine, which ultimately leads to the release of the bis(triphenylphosphane)iminium cation [PPh3=N=PPh3]+ through several intermediates, among which the phosphoraniminato derivative [PW11O39{RuVNPh3}]3- has been structurally characterized. Its unusual oxidation state is in accordance with its EPR spectrum.
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30
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Synthesis, structure, and estrogenic activity of 4-amino-3-(2-methylbenzyl)coumarins on human breast carcinoma cells. Bioorg Med Chem 2007; 15:2269-82. [PMID: 17275315 DOI: 10.1016/j.bmc.2007.01.025] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2006] [Revised: 01/09/2007] [Accepted: 01/17/2007] [Indexed: 11/28/2022]
Abstract
A number of coumarins exhibit interesting pharmacological activities and are therefore of therapeutic use. We report here the synthesis and the structural analysis of new N-substituted 4-amino-3-(2-methylbenzyl)coumarins (compounds 8a-8e) that present structural analogies with estrothiazine and 11- or 7-substituted 17beta-estradiol. These derivatives were tested with respect to estrogenic activity on the estrogen receptor positive (ER+) human MCF-7 breast cancer cell line. Two of the reported compounds (8a and 8b) stimulated specifically the proliferation of MCF-7 cells, but not that of estrogen receptor negative (ER-) human MDA-MB-231 breast cancer cells, suggesting that their mitogenic activity is mediated by ER. Accordingly, the stimulating effect of 8a and 8b was suppressed by the pure antiestrogen fulvestrant. Besides, 8a and 8b induced ER down-regulation similar to that produced by classical ER agonists or pure antagonists. The effects of the compounds under study on ER-mediated transcription were assessed on (ER+) MVLN cells, that is, MCF-7 cells stably transfected with a pVit-tk-Luc reporter plasmid. Derivatives 8a and 8b, and surprisingly compound 8c, enhanced ER-mediated gene transactivation in that model. Finally, no coumarin was able to compete with tritiated 17beta-estradiol ([(3)H]E(2)) for ER binding, suggesting unconventional interactions with the receptor, such as interactions with the second binding pocket or with the coactivator-binding region. To conclude, observations performed in this study on compound 8c reveal that estrogenic activity can be dissociated from enhancement of cell proliferation. Furthermore, ERE-driven transactivation of transcription seems to be a condition necessary, but not sufficient, for estrogen-induced stimulation of cell growth.
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31
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Synthesis and reactivity of {Ru(p-cymene)}2+derivatives of [Nb6O19]8−: a rational approach towards fluxional organometallic derivatives of polyoxometalates. Dalton Trans 2007:1334-45. [PMID: 17372649 DOI: 10.1039/b617390j] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three {Ru(p-cym)}(2+) (p-cym = p-cymene) derivatives of [Nb(6)O(19)](8-)-[Nb(6)O(19){Ru(p-cym)}](6-) (Nb(6)Ru(1)), trans-[Nb(6)O(19){Ru(p-cym)}(2)](4-) (t-Nb6Ru2), and [Nb(6)O(19){Ru(p-cym)}(4)] (Nb(6)Ru(4))--have been synthesized in water by reaction between [Ru(p-cym)Cl(2)](2) and the hexaniobate. In the solid state, Nb(6)Ru(1) and Nb(6)Ru(4) have been characterized by IR and EDX spectroscopies, whereas t-Nb(6)Ru(2) has been characterized by IR spectroscopy and single-crystal X-ray diffraction (crystal data for K(4)-trans-[Nb(6)O(19){Ru(p-cym)}(2)].14H(2)O (K(4)-t-Nb(6)Ru(2).14H(2)O). In solution, all compounds were characterized by (1)H NMR and ESI mass spectrometry analyses, and Nb(6)Ru(1) was also analyzed by (17)O NMR. These studies allowed a comparison of the differences in behaviour of the three complexes in water: Nb(6)Ru(1) is particularly stable, Nb(6)Ru(4) decomposes by loss of {Ru(p-cym)}(2+) fragments, and trans-[Nb(6)O(19){Ru(p-cym)}(2)](4-) isomerizes into cis-[Nb(6)O(19){Ru(p-cym)}(2)](4-). A rational mechanism for the isomerisation of t-Nb(6)Ru(2) is proposed on the basis of a kinetic study.
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35
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Carboxylate‐Containing Tin(
IV
) Isopropoxides: Synthesis and Characterization of [Sn(O
i
Pr)
2
(O
2
CR)
2
]
2
[R = (CH
3
)CCH
2
, C
6
H
5
, CH
3
]. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200500570] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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37
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38
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Self-Assembly of 1-D Coordination Polymers Using Organometallic Linkers and Exhibiting Argentophilic Interactions AgI···AgI. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200500605] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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39
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A new crystallographic form of the layered weak-ferromagnet Fe[(CH 3PO 3)(H 2O)]. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305085673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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40
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Radical cation salts of TTF(CH2OH)4 with cyanide anions: Synthesis, crystal structure and magnetic properties of [TTF(CH2OH)4][TCNQF4] and [TTF(CH2OH)4]3[18-crown-6⊂K][M(CN)6]·DMF (M=Fe, Co). Polyhedron 2005. [DOI: 10.1016/j.poly.2005.04.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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41
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Crystal structure of pentafluorophenyl ferrocene, Fe(C5H5)(C11H4F5). Z KRIST-NEW CRYST ST 2005. [DOI: 10.1524/ncrs.2005.220.14.71] [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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42
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Reactivity of Titanium Oxo Ethoxo Cluster [Ti16O16(OEt)32]. Versatile Precursor of Nanobuilding Block-Based Hybrid Materials. J Am Chem Soc 2005; 127:4869-78. [PMID: 15796551 DOI: 10.1021/ja043330i] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Oxo alcoxo metallic clusters can be employed as inorganic nanobuilding blocks to obtain well-defined organic-inorganic hybrid materials. A better understanding of the surface reactivity of the clusters should allow optimization of the elaboration of hybrid materials through a better control of the hybrid interface. The oxo alcoxo cluster Ti(16)O(16)(OEt)32 presents a shell of labile ethoxy groups that can be selectively transalcoholyzed with preservation of the titanium oxo core, leading to new oxo alcoxo clusters Ti(16)O(16)(OEt)32-x(OR)x (R: alkyl, phenyl, styrenic, etc. groups). The reactivity of the Ti(16)O(16)(OEt)32 cluster toward aliphatic and aromatic alcohols is investigated to determine both the kinetics and the number of substituted titanium atoms, which are strongly dependent on the nature of the alcohol. Characterization of the organic modification of the cluster is performed in situ by liquid (13)C NMR measurements, using the molecular structures of two new clusters, Ti(16)O(16)(OEt)28(OnPr)4 and Ti(16)O(16)(OEt)(24)(OnPr)(8) (OnPr = propoxy groups), as references. The structures of these clusters have been established using single-crystal X-ray diffraction. Moreover, a complete spectroscopic assignment of each ethoxy group is proposed after combining crystallographic data, (13)C NMR T(1) relaxation measurements, and (1)H-(1)H, (1)H-(13)C 2D NMR experiments. Finally, the cluster is functionalized with polymerizable ligands via transalcoholysis and transesterification reactions using hydroxystyrene and acetoxystyrene.
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The tailoring of crystal structures via the self-assembly of organic coordination compounds by N⋯I non-covalent halogen bonds: co-crystals of sterically hindered N-heterocycles and 1,4-diiodo-tetrafluorobenzene. CrystEngComm 2005. [DOI: 10.1039/b500009b] [Citation(s) in RCA: 54] [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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44
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Structure, magnetism and optical properties of achiral and chiral two-dimensional oxalate-bridged anionic networks with symmetric and asymmetric ammonium cations. Dalton Trans 2005:3101-7. [PMID: 16127506 DOI: 10.1039/b506671a] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of two-dimensional (2D) oxalate-based compounds, namely [N(n-C4H9)4][M(II)Cr(III)(ox)3] (M(II) = Mn, Fe; ox = C2O4(2-)) and [N(C2H5)(n-C3H7)(n-C4H9)(n-C5H11)][M(II)M(III)(ox)(3)] ((M(II), M(III)) =(Mn, Cr), (Fe, Cr), (Mn, Fe)) were synthesised starting from racemic tris(oxalato)metalate: rac-[M(III)(ox)3]3- (M(III) = Cr, Fe). For Cr(III), the synthesis has been undertaken starting from resolved (Delta)- or (Lambda)-[Cr(III)(ox)3]3-. The natural circular dichroism measurements assess the enantioselectivity of the synthesis. X-Ray powder diffraction analysis has revealed that, when racemic reagents are used to synthesise Mn(II) containing compounds, a R3c achiral space group is found. In contrast a P6(3) chiral space group is found when starting from (Delta)- or (Lambda)-[Cr(III)(ox)3]3-. Surprisingly, whatever the optical purity of the starting building block, all Fe(II) containing compounds crystallise in the P6(3) chiral space group. The magnetic properties of the synthesised compounds confirm that these compounds are ferromagnets for M(III)= Cr. For M(II)= Mn, Theta ranges between 9 and 11 K and T(c) equals 6 K. For M(II)= Fe, Theta ranges between 14 and 16 K and Tc between 11 and 12 K. [N(C2H5)(n-C3H7)(n-C4H9)(n-C5H11)][Mn(II)Fe(III)(ox)3] is an antiferromagnet with Theta = - 107 K and T(N) = 29 K.
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A convenient preparation of 2,3,5,6-tetrafluoro-4-iodo-benzaldehyde and its application in porphyrin synthesis. J Fluor Chem 2004. [DOI: 10.1016/j.jfluchem.2004.04.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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46
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Chiral Recognition and Resolution Mediated by π−π Interactions: Synthesis and X-ray Structure of trans-[(Sp,Sp)-bis(Cp*Ru)-carbazolyl][Δ-Trisphat]. Organometallics 2004. [DOI: 10.1021/om049453t] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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47
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Self-assembly via (N⋯I) non-covalent bonds between 1,4-diiodo-tetrafluoro-benzene and a tetra-imino ferrocenophane. J Mol Struct 2004. [DOI: 10.1016/j.molstruc.2003.11.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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48
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First Total Synthesis of 1-O-β-d-Glucopyranosyl-5-deoxyadenophorine and Its Aglycon Congener: Determination of the Absolute Configuration. J Org Chem 2004; 69:1497-503. [PMID: 14987003 DOI: 10.1021/jo035522m] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first total synthesis of the potent glycosidase inhibitors 1-O-beta-D-glucopyranosyl-5-deoxyadenophorine and its aglycon congener is described in respectively 13 steps (9% overall yield) and 9 steps (29% overall yield) from (R)-Garner aldehyde. The synthesis takes advantage of several key reactions including a diastereoselective allylation of a chiral imine, a stereoselective epoxidation, and a glycoside coupling. In addition this study established unambiguously the absolute configuration of the natural products.
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Efficient resolution of the cis-[Ru(phen)2(MeCN)2]2+ complex (phen = 1,10-phenanthroline) using Δ-[tris(tetrachlorobenzenediolato)-phosphate(V)] as a chiral counter-ion. MENDELEEV COMMUNICATIONS 2004. [DOI: 10.1070/mc2004v014n06abeh002034] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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50
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Coordination polymer incorporating maleonitriledithiolate copper clusters: electrocrystallization synthesis and crystal structure of (NPr4)2[Cu(MeCN)]2[Cu8(i-mnt)6]·(MeCN)0.5·(THF)0.25. Dalton Trans 2004:2394-5. [PMID: 15303146 DOI: 10.1039/b408458f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(NPr4)2[Cu(MeCN)]2[Cu8(i-mnt)6].(MeCN)0.5.(THF)0.25 is prepared by electrocrystallization of a solution of (NPr(4))(4)[Cu(I)(8)(i-mnt)(6)]; the crystal structure consists in bidimensional layers characterised by coordination of copper atoms by the cyano groups of the iso-maleonitriledithiolate ligand of the octa-copper cluster.
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