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An efficient and selective new method for the preparation of unsymmetrical 1,1?-disubstituted ferrocenes by a one-pot procedure, starting from ferrocenecarbaldehyde, is disclosed.

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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 synthesis, electrochemical, electronic, and cation sensing properties of multinuclear nitrogen-rich [2.2]- and [3.3]-mixed ferrocene and ruthenocene metallocenophanes are presented. Structural features of these new structural motifs are that the two redox organometallics fragments are linked by unsaturated nitrogen functionalities, for example, carbodiimide or aldimine, as well as the nitrogen atom is directly attached to the ruthenocene unit. The key bis(iminophosphorane) 3 is readily prepared by the Staudinger reaction between triphenylphosphine and 1,1?-diazidoruthenocene 2, which has been prepared from 1,1?- dilithioruthenocene and 2,4,6-trisopropylbenzenesulfonyl azide (trisyl azide). Subsequent aza-Wittig reactions of 3 with the appropriate carbonyl or thiocarbonyl compounds provided the opened ruthenocenebased isothiocyanate 4, and the closed carbodiimide 5 and aldimines 6 and 7. Spectroelectrochemical studies of carbodiimide 5 and aldimine 7 revealed the presence of low-energy bands in the near-IR region in the partially oxidized forms, at 1029 and 1481 nm, respectively, which indicate the existence of intramolecular charge transfer between the iron and the ruthenium centers. The experimental data and conclusions are supported by DFT computations. Moreover, the aldimine 7 behaves as a selective colorimetric chemosensor molecules for Zn2+ ions. The low-energy (LE) band of the absorption spectrum of this compound is red-shifted by 99 nm, only in the presence of Zn2+ ions. This change in the absorption spectrum is accompanied by a dramatic color change, which allows the potential for “naked eye” 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

Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes. Reference of 1271-48-3. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. Introducing a new discovery about 1271-48-3, Name is 1,1′-Ferrocenedicarboxaldehyde

Reactions of Fc?(CHO)2 1 (Fc? = 1,1?-ferrocenediyl) with LiC{triple bond, long}CR gave substituted propargylic alcohols Fc?{CH(OH)C{triple bond, long}CR}2 (R = SiMe3 2, Fc 9). Oxidation (MnO2) of these alcohols afforded the bis(alkynyl ketone)s Fc?{C(O)C{triple bond, long}CR}2 (R = SiMe3 3, Fc 10), the former being accompanied by the partially desilylated Fc?{C(O)C{triple bond, long}CH}-1-{C(O)C{triple bond, long}CSiMe3}-1? 4. The reaction between 4 and RuCl(dppe)Cp in the presence of Na[BPh4] gave the cyclic vinylidene complex [Ru{{double bond, long}C{double bond, long}C[C(O)Fc?C(O)CH{double bond, long}CH]}(dppe)Cp]BPh4 5. The diastereomers were separated by flash chromatography (2) or preparative t.l.c. (9) to give the cis (2a, 9a) and trans (2b, 9b) isomers. Cyclisation of each isomer to the corresponding ferrocenophane was catalysed by pTSA to give Fc?{[CH(C{triple bond, long}CR)]2O} (R = SiMe3 6a, 6b; Fc 11a, 11b), of which 6a, 6b could be desilylated to Fc?{[CH(C{triple bond, long}CH)]2O} 7a, 7b, and further transformed into the bis(eta2-alkyne-dicobalt) complexes Fc?{[CH(eta2-C2H[Co2(mu-dppm)(CO)4])]2O} 8a, 8b with Co2(mu-dppm)(CO)6. Molecular structures of 3, 5, 6a, 6b, 7a, 7b and 10 were determined by single-crystal XRD methods.

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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

Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes. Reference of 1271-48-3. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. Introducing a new discovery about 1271-48-3, Name is 1,1′-Ferrocenedicarboxaldehyde

The atomic bond and molecular polarizabilities of some ferrocene derivatives have been calculated using variational method and delta-function electronic wave functions.Scales have been presented, where the derivatives are classified in order of their polarization properties.Common trends and patterns of behaviour are recognized and discussed.

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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

Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes. name: 1,1′-Ferrocenedicarboxaldehyde. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. Introducing a new discovery about 1271-48-3, Name is 1,1′-Ferrocenedicarboxaldehyde

An efficient and simple solvent-free mechanochemical approach for the synthesis of 1,1′-ferrocenyldiacrylonitriles was achieved by grinding together 1,1′-ferrocenedicarboxaldehyde (1) and phenylacetonitriles. A range of 1,1′-ferrocenyldiacrylonitriles and ferrocenylacrylonitriles (2-7) were synthesized within short reaction times, with water as the only by-product. In a similar manner, grinding together ferrocenemonocarboxaldehyde (8) and phenylenediacetonitrile yielded phenylene-3,3′-bis-(ferrocenyl)diacrylonitrile (9) and 3-ferrocenyl-2-(acetonitrophenyl)acrylonitrile (10). The yield and selectivity towards formation of ferrocenyldiacrylonitriles was strongly influenced by the electronegativity of the para-substituent on the phenyl ring of phenylacetonitriles. The compounds were characterized using NMR, IR, and UV-visible spectroscopy and HR-MS. Cyclic voltammetry measurements of selected compounds highlighted the role of ligands in tuning the electrochemical properties of 1,1′-ferrocenyldiacrylonitriles. X-ray crystallographic analysis highlighted the effect of the electronegativity of the para-substituent on the conformation of cyclopentadienyl rings attached to a ferrocenyl moiety.

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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

Chemical engineers work across a number of sectors, processes differ within each of these areas, but chemistry and chemical engineering roles are found throughout, creation and manufacturing process of chemical products and materials. Electric Literature of 1271-48-3. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. Introducing a new discovery about 1271-48-3, Name is 1,1′-Ferrocenedicarboxaldehyde

New bioorganometallic ferrocene derivatives are synthesized through a Diversity Oriented Synthesis strategy. Easily available ferrocene bisimines have been transformed into open ferrocenyl bis-beta-lactams. These compounds have demonstrated to be versatile synthons used in further transformations into new ferrocene bis-beta-amino acids. Carefully selected substituents submitted to ring closing metathesis (RCM) and Cu-catalyzed oxidative alkyne coupling conditions have also allowed the conversion of open substrates into ferrocenic macrocyclic bis-beta-lactams. The Royal Society of Chemistry 2009.

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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

While the job of a research scientist varies, most chemistry careers in research are based in laboratories,Quality Control of 1,1′-Ferrocenedicarboxaldehyde, where research is conducted by teams following scientific methods and standards. In a patent，Which mentioned a new discovery about 1271-48-3

The invention relates to bi-functionalised metallocenes of general formula (I) where Me=a transition metal, preferably chosen from Fe, Ru and Os, Y and Z, when identical are selected from ?(CH2)n?O?, (CH2)?O?[(CH2)2?O]P? and ?(CH2)q?CONH?(CH2)r?O?, or Y=?(CH2)S?NH? and Z=?(CH2)t?COO?, n=a whole number from 3 to 6 inclusive, p=a whole number from 1 to 4 inclusive, q=a whole number from 0 to 2 inclusive, r=a whole number from 0 to 2 inclusive, s=a whole number from 2 to 5 inclusive, t=a whole number from 3 to 6 inclusive, R and R?=H atoms or are protective groups used in oligonucleotide and peptide synthesis, where at least one of R or R? is protective group used in oligonucleotide and peptide synthesis and R and R? are as defined below: (i) when Z and Y are selected from (CH2)n?O?, ?(CH2)?O?[(CH2)2?O]p? and ?(CH2)q?CONH?(CH2)r?O?, then R and R? are protective groups used in oligonucleotide synthesis and R is a group which can leave a free OH group after deprotection, preferably a photolabile group such as monomethroxythoxytrityl, dimethoxytrityl, t-butyldimethylsilyl, acetyl or trifluroacetyl, and R? is a phosphorylated group which can react with a free OH, preferably a phosphodiester, phosphoramidite or H-phosphonate and (ii) when Y=?(CH2)n?NH? and Z=?(CH2)t?COO?, then R is a protective group used in the synthesis of peptides and is an amino-protecting group, preferably 9-fluorenyloxycarbonyl, t-butoxycarbonyl or benzyloxycarbonyl and R?=H. The above is applied in marking.

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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

While the job of a research scientist varies, most chemistry careers in research are based in laboratories,Product Details of 1271-48-3, where research is conducted by teams following scientific methods and standards. In a patent，Which mentioned a new discovery about 1271-48-3

Ferrocenyl and pyridyl methylenepyrans were obtained from a Wittig reaction between a pyran phosphorane and ferrocenyl or pyridyl-aldehydes. The nucleophilic nature of the exocyclic C-C bond allowed the formylation of these compounds by a Vilsmeier type reaction. All the new products were characterized by IR spectroscopy, 1H and 13C NMR spectroscopy, mass spectroscopy and (or) elemental analysis. Electrochemistry of representative compounds 2, 10 and 13 was undertaken. In addition, a crystal structure of the ferrocenylpyranylidene aldehyde 5 was described, and the pyrylium character of this compound was specified.

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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

Synthetic Route of 1271-48-3, Chemistry graduates have much scope to use their knowledge in a range of research sectors, including roles within chemical engineering, chemical and related industries, healthcare and more. 1271-48-3, Name is 1,1′-Ferrocenedicarboxaldehyde, molecular weight is 242.0516. In an Article，once mentioned of 1271-48-3

A new chemosensor RF1 that combines a ferrocene unit and a rhodamine block via the linkage of a carbohydrazone binding unit was designed and prepared for the highly selective detection of Hg2+ in natural water. This chemosensor displays great brightness and fluorescence enhancement following Hg2+ coordination within the limit of detection for Hg2+ at 1 parts per billion (ppb). The fluorescence intensities are nearly proportional to the amount of Hg2+ at the ppb level. It is capable of distinguishing between the safe and the toxic levels of inorganic mercury in drinking water. Hg2+-binding also arouses the absorption of the rhodamine moiety in RF1 significantly with the chromogenic detection limit for Hg2+ at 50 ppb. The conventional UV-vis spectroscopic method thus has the potential to provide the critical information about the mercury hazard assessment for industrial wastewater discharging. The obvious and characteristic color change of the titration solution from colorless to pink upon the addition of Hg2+ demonstrates that RF1 can be used for “naked-eye” detection of Hg2+ in water. The Hg2+ complexation also causes a significant shift of the redox potential about the ferrocene/ ferrocenium couple. The electrochemical responses provide the possibility to quantitative analysis of Hg2+ at the parts per million (ppm) level. Preliminary investigations in natural water samples including seawater and freshwater indicate that RF1 offers a direct and immediate Hg2+ detection in complex media, pointing out its potential utility in environment monitoring and assessment. The responses of RF1 are Hg2+ specific, and the chemosensor exhibits high selectivity toward Hg2+ over other Group 12 metals, alkali, alkaline earth metals, and most of the divalent first-row transition metals. The RF1-Hg2+ complex is successfully isolated and the Hg2+-binding is reversible. The crystal structure and spectral properties of its congener RF2 that contains one ferrocene group and two rhodamine 6G moieties were also investigated for a comparison.

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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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Homogeneous catalysis has been responsible for many major recent developments in synthetic organic chemistry. The combined use of organometallic and coordination chemistry has produced a number of new and powerful synthetic methods for important classes of compounds in general and for optically active substances in particular. For this aim, a new class of chiral modular C2-symmetric ferrocenyl phosphinite ligands has been prepared in good yields by using the inexpensive 1,1?-ferrocenedicarboxyaldehyde and various ferrocene based-amino alcohols as starting materials, and applied in the rhodium(I)-catalyzed asymmetric transfer hydrogenation (ATH) of aromatic ketones to give corresponding secondary alcohols with excellent enantioselectivities and reactivities using isoPrOH as the hydrogen source (up to 99% conversion and 99% ee). The substituents on the backbone of the ligands are found to exhibit a remarkable effect on both the activity and % ee. The structures of these ligands and their complexes have been elucidated by a combination of multinuclear NMR spectroscopy, IR spectroscopy and elemental analysis.

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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