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Rigid N-(substituted)-2-aza-[3]-ferrocenophanes L1 and L2 were easily synthesized from 1,1 -dicarboxyaldehydeferrocene and the corresponding amines. Ligands L1 and L2 were characterized by 1H NMR, 13C NMR and single-crystal X-ray crystallography. The coordination abilities of L1 and L2 with metal ions such as Cu2+, Mg2+, Ni2+, Zn2+, Pb2+ and Cd2+ were evaluated by cyclic voltammetry. The electrochemical shift (DeltaE1/2) of 125 mV was observed in the presence of Cu2+ ion, while no significant shift of the Fc/Fc + couple was observed when Mg2+, Ni2+, Zn 2+, Pb2+, Cd2+ metal ions were added to the solution of L1 in the mixture of MeOH and H2O. Moreover, the extent of the anodic shift of redox potentials was approximately equal to that induced by Cu2+ alone when a mixture of Cu2+, Mg2+, Ni2+, Zn2+, Pb2+ and Cd2+ was added to a solution of L1. Ligand L1 was proved to selectively sense Cu2+ in the presence of large, excessive first-row transition and late-transition metal cations. The coordination model was proposed from the results of controlled experiments and quantum calculations.

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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Further advances in understanding the mechanism of action of resveratrol and its application require new analogs to identify the structural determinants for the cell proliferation inhibition potency. Therefore, we synthesized new trans-resveratrol derivatives by using the Wittig and Heck methods, thus modifying the hydroxylation and methoxylation patterns of the parent molecule. Moreover, we also synthesized new ferrocenylstilbene analogs by using an original protective group in the Wittig procedure. By performing cell proliferation assays we observed that the resveratrol derivatives show inhibition on the human colorectal tumor SW480 cell line. On the other hand, cell viability/cytotoxicity assays showed a weaker effects on the human hepatoblastoma HepG2 cell line. Importantly, the lack of effect on non-tumor cells (IEC18 intestinal epithelium cells) demonstrates the selectivity of these molecules for cancer cells. Here, we show that the numbers and positions of hydroxy and methoxy groups are crucial for the inhibition efficacy. In addition, the presence of at least one phenolic group is essential for the antitumoral activity. Moreover, in the series of ferrocenylstilbene analogs, the presence of a hidden phenolic function allows for a better solubilization in the cellular environment and significantly increases the antitumoral activity.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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Complexes containing one, two, or three 1,2-dihydro-3-xylylquinazolinium-4- yl palladium units are obtained by reacting dialdehydes (C6H 4(CHO)2-1,4, C6H4(CHO) 2-1,3, 1,1?-ferrocenedicarboxaldehyde) or the trialdehyde 1,3,5-tris-(4-formylphenyl)benzene) with 1, 2, or 3 equiv of each of the amino(iminobenzoyl) complex trans-[PdI{C(=NXy)C6H4NH 2-2}(CNXy)2] (Xy = C6H3Me 2-2,6) and triflic acid (HOTf), through a hydroiminiumation of the imine formed between the aldehyde and 2-amino group. The crystal structures of the dinuclear derivatives prepared from C6H4(CHO) 2-1,4 and C6H4(CHO)2-1,3 have been determined, and the electrochemical behavior of the dinuclear ferrocenyl derivative has been studied.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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In this paper we describe the synthesis, the electrochemical behaviour as well as the linear and nonlinear optical (NLO) properties of two push-pull derivatives bearing pyranylidene electron donating fragment, pyrimidine/methyl pyrimidinium electron withdrawing moiety and a ferrocene part in the pi-conjugated bridge. The properties of these two compounds were compared to their analogues without ferrocene or pyranylidene fragments. Experimental results were completed with DFT calculations to gain further insight into the intramolecular charge transfer (ICT). All the results indicate a significant charge transfer through the ferrocene unit. The ICT is however more limited than in all organic analogues.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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Synthesis of the (E,E)-1,1?-ferrocene nanostructures having controlled pi-extended conjugation was satisfactory carried out starting of 1?-[2-(1,3-dioxolan)]-1-formylferrocene (1). The molecular unit (E)-1?-[2-(1,3-dioxolan)]-1-[beta-(p-iodophenyl)ethenyl]ferrocene (2), was obtained in excellent yield by treatment of 1 with p-iodobenzyl triphenylphosphonium ylid followed by Z?E isomerization, catalyzed by iodine, in quantitative yield. Compound (E)-2 was transformed in (E)-1?-{2-(1,3-dioxolan)-1-[beta-[4-(3-hydroxy-3-methyl-but-1-ynyl)-phenyl]-ethenyl}ferrocene, (E)-4, by palladium catalyzed cross-coupling with 2-methyl-but-3-yn-2-ol. (E)-4 gives (E)-1-[beta-(4-ethynylphenyl)-ethenyl]-1?-[2-(1,3-dioxolan)]ferrocene (E)-5 by powder sodium hydroxide treatment. The molecular unit (E,E)-1-{beta-[4-(beta-(1?-formylferrocenyl)-ethenyl)-phenylethynyl]-phenyl]-ethenyl}-1?-formylferrocene, (E,E)-6, was synthesized by palladium catalyzed cross-coupling between the p-iodophenyl derivative (E)-2 and their ethynyl derivative (E)-5, in good yield. The (E,E)-1,1?-(p-iodophenyl)ethenyl ferrocene, (E,E)-7, was synthesized by reaction between 1,1?-diformylferrocene and the p-iodobenzyltriphenylphosphonium ylid, as a mixture of isomers which were purely isolated. Moreover, isomerization of the Z,Z and E,Z mixture to the E,E isomer, was induced by sunlight exposure, catalyzed by iodine, in quantitative yield. The (E,E)-1,1?-[beta-(4-ethynylphenyl)-ethenyl]ferrocene, (E,E)-10, was synthesized in good yield, by palladium catalyzed cross-coupling of compound (E,E)-7 with 2-methyl-but-3-yn-2-ol, followed by powder sodium hydroxide treatment.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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The first sumanene-ferrocene probes for efficient and selective caesium cation (Cs+) recognition are reported. The working mechanism of the sumanene moiety as the sensing unit was based on the site-selective cation-pi interaction in its neutral state. The interactions with Cs+ were characterized by high association constant values together with low limits of detection.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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The compound bis[1,1?-N,N?-(2-picolyl)aminomethyl]ferrocene, L1, was synthesized. The protonation constants of this ligand and the stability constants of its complexes with Ni2+, Cu2+, Zn2+, Cd2+ and Pb2+ were determined in aqueous solution by potentiometric methods at 25C and at ionic strength 0.10 mol dm-3 in KNO3. The compound L1 forms only 1:1 (M:L) complexes with Pb2+ and Cd2+ while with Ni 2+ and Cu2+ species of 2:1 ratio were also found. The complexing behaviour of L1 is regulated by the constraint imposed by the ferrocene in its backbone, leading to lower values of stability constants for complexes of the divalent first row transition metals when compared with related ligands. However, the differences in stability are smaller for the larger metal ions. The structure of the copper complex with L1 was determined by single-crystal X-ray diffraction and shows that a species of 2:2 ratio is formed. The two copper centres display distorted octahedral geometries and are linked through the two L’ bridges at a long distance of 8.781(10) A. The electrochemical behaviour of L1 was studied in the presence of Ni2+, Cu2+, Zn2+, Cd2+ and Pb2+, showing that upon complexation the ferrocene – ferrocenium half-wave potential shifts anodically in relation to that of the free ligand. The maximum electrochemical shift (DeltaE1/2) of 268 mV was found in the presence of Pb2+ followed by Cu2+ (218 mV), Ni 2+ (152 mV), Zn2- (111 mV) and Cd2+ (110 mV). Moreover, L1 is able to electrochemically and selectively sense Cu2+ in the presence of a large excess of the other transition metal cations studied.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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Reaction of ferrocene-1,1′-dicarbaldehyde and ethane-l,2-diamine yielded the Schiff-base derivative 2,5,19,22-tetraaza<6.6>(1,1′)ferrocenophane-1,5-diene, 1 the molecular structure of which has been determined by singlecrystal X-ray analysis.Hydrogenation of 1 with LiAIH4 resulted in the corresponding amine 2,5,19,22-tetraaza<6.6>(1,1′)ferrocenophane 2 which was characterised crystallographically.The protonation behaviour of 2 (denoted as L) and its complex formation with copper(II), nickel(II) and zinc(II) has been studied by potentiometric titrations in tetrahydrofuran-water (70:30 v/v) (0.1 mol dm-3 NBu4ClO4, 25 deg C).The complexes 3+, 2+, + and are formed.An electrochemical study of compound 2 has also been performed under the same conditions at which the potentiometry was carried out and the pKa values for the mixed-valence Fe(II)Fe(III) and oxidised Fe(III)Fe(III) species determined by fitting the curve of E1/2 versus pH.From those data the Pourbaix diagram of the redox-active 2 has been calculated.Compound 2 can be considered as a selective electrochemical sensor for copper(II).

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

With the volume and accessibility of scientific research increasing across the world, it has never been more important to continue building the reputation for quality and ethical publishing we’ve spent the past two centuries establishing.In an article, 1271-48-3, molcular formula is C12H10FeO2, belongs to iron-catalyst compound, introducing its new discovery., Recommanded Product: 1,1′-Ferrocenedicarboxaldehyde

A polychlorotriphenylmethyl diradical connected by a 1,1?-ferrocenylendivinylene bridge has been synthesized and characterized. ESR frozen solution experiments down to helium temperature showed that the organometallic unit acts as a ferromagnetic coupler. This fact was supported by ZINDO/1 semiempirical calculations, which showed that the two singly occupied molecular orbitals (SOMOs) are non disjoint in addition to be almost degenerated.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction. Recommanded Product: 1271-48-3. In heterogeneous catalysis, catalysts provide a surface to which reactants bind in a process of adsorption. Introducing a new discovery about 1271-48-3, Name is 1,1′-Ferrocenedicarboxaldehyde

Condensation reaction of 1,1?-ferrocenedicarboxaldehyde with (1R,2R)-1,2-diaminocydohexane affords a novel bowl-shaped macrocycle with a chiral concave cavity which exhibits a remarkable ability as a host material for the enantioselective enclathration of 1,1?-bi-2-naphthol.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion