Day: September 22, 2021

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The [4+2] cycloaddition reaction of the (dimesitylphosphino)cyclopentadienes 5a,b with N-phenylmaleimide gave the norbornene derivative 9. Its reduction with LiAlH4 produced the N-phenylpyrrolidino-annulated system 10. Treatment with Piers’ borane gave the respective P/B FLP 12 as the major product, which cleaved dihydrogen under mild conditions to yield the phosphonium/hydrido borate product 14. Reaction of the phosphino-norbornene 10 with 2 M equiv. of Piers? borane [HB(C6F5)2] followed by exposure to dihydrogen eventually gave the HB(C6F5)2 adduct 15. This served as a catalyst for the hydrogenation of a series of chalcone derivatives. The system requires a pre-activation period before becoming active for the conjugated enone hydrogenation.

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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 study, we have developed a novel electrochemical device (IDEA-Bio-LSI) incorporating interdigitated electrodes array (IDEA) and a LSI-based amperometric device (Bio-LSI) for high speed (4?200 ms) and selective imaging of an analyte diffusion and cellar activities such as dopamine release. The amplification factor (etaamp) and capture efficiency (CE) of IDEA of the device were 2.17 and 0.767, respectively. Compared with previously reported IDE based imaging sensor, the acquisition speed of the present device to acquire one image was improved up to 50?250 times. In addition, the dopamine release from PC12 spheroids in the presence of ascorbic acid was successfully obtained by using the IDEA-Bio-LSI. Therefore, IDEA-Bio-LSI can apply to rapid analyte diffusion biological events such as release of dopamine release.

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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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A systematic study of the reactions of a number of alpha-hydroxylated ferrocene derivatives with thioglycolic acid confirms that the reaction is extremely fast, viz., 15-20 min <1>, as compared with earlier procedures (12 h) <2,3>.The important kinetic parameters of the reaction of 1-ferrocenylethanol with the thioglycolic acid in the presence of trifluoroacetic acid have been determined.

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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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Electrochemical molecularly imprinted polymers (e-MIPs) are reported for the first time. Their elaboration is based on the introduction of a redox tracer (vinylferrocene) inside the binding cavities of a cross-linked MIP. Determination of the analyte (benzo[a]pyrene) can be simply performed by measuring the redox tracer signal. the Partner Organisations 2014.

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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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A novel ferrocene-containing dianion, Fe(C5H4- CH(CH3)NHCOCH2SO3-)2 (1), has been prepared. The oxidation potential of the PPh4 salt is + 0.35 V (vs. SCE in PhCN), indicating that it is a stronger donor than TTF (tetrathiafulvalene) by + 0.03 V. The dianion provided a TTF salt, the structure and physical properties of which are reported.

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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

COA of Formula: C11H3FeO, Researchers are common within chemical engineering and are often tasked with creating and developing new chemical techniques, frequently combining other advanced and emerging scientific areas.1273-86-5, Name is Ferrocenemethanol, molecular weight is 206.99. belongs to iron-catalyst compound, In an Article，once mentioned of 1273-86-5

The iron complex [Fp][OTf] {Fp+ = [Fe(CO)2(Cp)] +, OTf- = SO3CF3-} is an efficient catalyst for the direct substitution of the OH group in ferrocenylmethanol [Fc-CH2OH] by thiols, aromatic amines, diphenylphosphane, and carbon nucleophiles (furan, pyrrole, and indole). This approach offers a convenient route to ferrocenes containing side chains with different functional groups. The advantages of the method are associated with the use of a catalyst based on iron, which is a nontoxic and readily available transition metal, and in the direct OH substitution, which produces water as the only byproduct. Direct substitution of the OH group in ferrocenylmethanol by S, N, P, and C nucleophiles containing an active hydrogen atom (thiols, aromatic amines, diphenylphosphane, furan, pyrrole, indole) can be accomplished by use of the iron catalyst [Fe(CO)2(Cp)][OTf] (Cp = cyclopentadienyl, OTf = SO3CF3). Copyright

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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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Ferrocene-based phosphine oxides with various substituents at phosphorous atoms were synthesized by Cu-catalyzed reductive coupling of ferrocenyl ketone-derived tosylhydrazones and H-phosphorus oxides. Followed by the reduction of ferrocene-based phosphine oxides, 1-substituted ferrocene-based phosphine ligand 7 and 1,1?-disubstituted ferrocene-based phosphine ligand 9 were obtained. Josiphos type ligand 8 were produced after ortho-lithiation of 7 and trapping with chlorodiphenyl phosphine or chlorodicyclohexylphosphine.

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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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A mononuclear non-heme manganese(V)-oxo complex, [MnV(O)(TAML)]- (1), was synthesized by activating dioxygen in the presence of olefins with weak allylic C-H bonds and characterized structurally and spectroscopically. In mechanistic studies, the formation rate of 1 was found to depend on the allylic C-H bond dissociation energies (BDEs) of olefins, and a kinetic isotope effect (KIE) value of 16 was obtained in the reactions of cyclohexene and cyclohexene-d10. These results suggest that a hydrogen atom abstraction from the allylic C-H bonds of olefins by a putative MnIV-superoxo species, which is formed by binding O2 by a high-spin (S = 2) [MnIII(TAML)]- complex, is the rate-determining step. A Mn(V)-oxo complex binding Sc3+ ion, [MnV(O)(TAML)]–(Sc3+) (2), was also synthesized in the reaction of 1 with Sc3+ ion and then characterized using various spectroscopic techniques. The binding site of the Sc3+ ion was proposed to be the TAML ligand, not the Mn-O moiety, probably due to the low basicity of the oxo group compared to the basicity of the amide carbonyl group in the TAML ligand. Reactivity studies of the Mn(V)-oxo intermediates, 1 and 2, in oxygen atom transfer and electron-transfer reactions revealed that the binding of Sc3+ ion at the TAML ligand of Mn(V)-oxo enhanced its oxidizing power with a positively shifted one-electron reduction potential (DeltaEred = 0.70 V). This study reports the first example of tuning the second coordination sphere of high-valent metal-oxo species by binding a redox-inactive metal ion at the supporting ligand site, thereby modulating their electron-transfer properties as well as their reactivities in oxidation reactions.

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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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A novel flow injection analysis (FIA) system suitable for measurements of glucose in blood serum is developed. In the proposed FIA system, a new kind of glucose sensor based on composite polymer films and well-immobilized enzyme was fabricated. An electrochemical technique of scanning electrochemical microscopy (SECM), and electrochemical impedance spectroscopy (EIS) were used for the characterization of the newly fabricated biosensor. A wide linear range of 0.1-50 mM for glucose detection was reported in virtue of the new configuration of the sensor and the developed FIA system. The reproducibility of signals was quite good with relative standard deviation (RSD) values for n = 4 injections (typically 5.7%). Animal blood serum was directly injected and assayed in this simulative physiological system. Good analytical recovery of glucose spiked into serum samples, with recoveries in the range of 96.7-105.0%, was exhibited. Under optimized conditions, detection of serum glucose for normal people and diabetics using our proposed method is possible.

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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 reaction of ferrocenylalkenes with chloromethyl alkyl ethers catalyzed by Lewis acids gives 3-alkoxy-1-ferrocenyl carbocations, which can be trapped by nucleophiles to give 1,3-disubstituted ferrocenylalkane derivatives.The application of this reaction to the preparation of chiral 3-hydroxy-1-ferrocenylalkylamines is described; their structures and conformations have been elucidated by NMR spectroscopy.The stereochemical course of the alkoxymethylation reaction involves “exo” attack of the chloromethyl ether at the beta carbon of the double bond relative to the ferrocene, and subsequent “exo” attack of the nucleophile at the carbocationic centre formed in the first step.

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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