Tag: M.W:200-300

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Rhodium(III) and ruthenium(II) complexes of redox-active, chelating N-heterocyclic carbene/thioether ligands, published in 2011, which mentions a compound: 1273-73-0, mainly applied to crystal structure rhodium ruthenium ferrocenyl NHC thioether complex preparation; mol structure rhodium ruthenium ferrocenyl NHC thioether complex; rhodium ruthenium ferrocenyl NHC thioether complex preparation electrochem property, Product Details of 1273-73-0.

Half-sandwich rhodium(III) and ruthenium(II) complexes bearing a new redox-active ferrocenyl NHC-thioether ligand have been prepared The synthesis of ferrocenyl thioether-imidazolium salts was carried out via intermediate FcSCH2CH2Cl using an improved procedure. Rhodium(III) complex and ruthenium(II) complex were obtained in good yields and were fully characterised by NMR spectroscopy, x-ray diffraction anal. and electrochem. Rhodium(III) complex shows a complex ABCD system by 1H NMR, which denotes conformational rigidity due to the presence of several bulky groups. Electrochem. anal. by cyclic voltammetry reveals reversible redox behavior about the iron center in both complexes, and indicates electronic communication between iron and rhodium or ruthenium.

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Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Diferrocenylamine》. Authors are Nesmeyanov, A. N.; Sazonova, V. A.; Romanenko, V. I..The article about the compound:Bromoferrocenecas:1273-73-0,SMILESS:Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25).Recommanded Product: 1273-73-0. Through the article, more information about this compound (cas:1273-73-0) is conveyed.

N-Acetylferrocenylamine heated with excess EtONa 40 min. at 150° gave a red-brown Na derivative, which with bromoferrocene in the presence of CuBr 1 h. at 110-20° gave a mixture of ferrocene, diferrocenyl, azoferrocene, starting material, and some N-acetyldiferrocenylamine, m. 176° (heptane). This and LiAlH4 in Et2O 6 h. gave after an aqueous treatment 8.3% N-ethyldiferrocenylamine, m. 149-9.5°, and yellow (70%) diferrocenylamine, m. 152-3° (aqueous EtOH). This and Et3O+BF4- 5-10 min. at room temperature gave 56% ethyldiferrocenylamine, identical with the above. N-Benzoylferrocenylamine in THF added to LiAlH4 and refluxed 6 h. under N gave after an aqueous treatment 86% benzylferrocenylamine, m. 125°; benzoyl derivative m. 134.5-5.5°. The amine and Et3O+BF4- in CH2Cl2 gave in 5 min. refluxing 81% ethylbenzylferrocenylamine, m. 48-8.5°. N-Acetylferrocenylamine was reduced with LiAlH4 in Et2O to 94% ethylferrocenylamine m. 56.5-8°, identical with the specimen formed from ferrocenylamine and Et3O+BF4-.

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Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

SDS of cas: 1428537-19-2. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: (R)-4-(tert-Butyl)-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole, is researched, Molecular C13H15F3N2O, CAS is 1428537-19-2, about Ni-Catalyzed Ligand-Controlled Regiodivergent Reductive Dicarbofunctionalization of Alkenes. Author is Pan, Qi; Ping, Yuanyuan; Wang, Yifan; Guo, Ya; Kong, Wangqing.

Transition-metal-catalyzed dicarbofunctionalization of alkenes involving intramol. Heck cyclization followed by intermol. cross-coupling has emerged as a powerful engine for building heterocycles with sterically congested quaternary carbon centers. However, only exo-cyclization/cross-coupling products can be obtained; endo-selective cyclization/cross-coupling has not been reported yet and still poses a formidable challenge. We herein report the first example of catalyst-controlled dicarbofunctionalization of alkenes for the regiodivergent synthesis of five- and six-membered benzo-fused lactams bearing all-carbon quaternary centers. Using a chiral Pyrox- or Phox-type bidentate ligand, 5-exo cyclization/cross-couplings proceed favorably to produce indole-2-ones in good yields with excellent regioselectivity and enantioselectivities (up to 98% ee). When C6-carboxylic acid-modified 2,2′-bipyridine was used as the ligand, 3,4-dihydroquinolin-2-ones were obtained in good yields through 6-endo-selective cyclization/cross-coupling processes. This transformation is modular and tolerant of a variety of functional groups. The ligand rather than the substrate structures precisely dictates the regioselectivity pattern. Moreover, the synthetic value of this regiodivergent protocol was demonstrated by the preparation of biol. relevant mols. and structural scaffolds.

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 2-(7-Bromo-1H-indol-3-yl)acetic acid, is researched, Molecular C10H8BrNO2, CAS is 63352-97-6, about Growth of Avena coleoptiles and pH drop of protoplast suspensions induced by chlorinated indoleacetic acids.Quality Control of 2-(7-Bromo-1H-indol-3-yl)acetic acid.

Several indoleacetic acids, substituted in the benzene ring, were compared in the Avena straight growth bioassay. 4-Chloroindoleacetic acid (I) [2519-61-1], a naturally occurring plant hormone, was one of the strongest hormones in this bioassay. With an optimum at 10-6 mol/L, it was more active than indoleacetic acid [87-51-4], 2,4-dichlorophenoxyacetic acid [94-75-7], and naphthaleneacetic acid [86-87-3]. 5-Chloro- [1912-45-4] and 6-chloroindoleacetic acid [1912-44-3] are very strong auxins as well. Other derivatives tested have a lower activity. 5,7-Dichloro- [1912-40-9] and 5-hydroxyindoleacetic acid [54-16-0] have very low auxin activity at 10-4 mol/L and may be antiauxins. Some of the derivatives were compared for their effect on pH decline in stem protoplast suspensions of Helianthus annuus and Pisum sativum. The change of pH occurs without a lag period or with only a very short one. Derivatives which are very active in the Avena straight growth assay cause a larger pH decline than indoleacetic acid, while inactive derivatives cause effectively no pH decline.

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Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Category: thiazolidine. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Synthesis of chiral ferrocenylazines. Negishi cross-coupling or SNH reactions?. Author is Musikhina, A. A.; Utepova, I. A.; Serebrennikova, P. O.; Chupakhin, O. N.; Charushin, V. N..

Preparation of new hetaryl-containing planar chiral ferrocene by a nucleophilic substitution of hydrogen in azines was performed using a lithium derivative of (S)-ferrocenyl-p-tolylsulfoxide as s nucleophilic reagent.

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Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Bromoferrocene( cas:1273-73-0 ) is researched.Category: thiazolidine.Rausch, M. D.; Moser, G. A.; Meade, C. F. published the article 《Isolation, characterization, and synthetic utility of several solid organolithium compounds》 about this compound( cas:1273-73-0 ) in Journal of Organometallic Chemistry. Keywords: ferrocenyllithium; carbene chromium tungsten complex; lithium ferrocene benzene. Let’s learn more about this compound (cas:1273-73-0).

Pentachlorophenyllithium and ferrocenyllithium were isolated and characterized as relatively air-stable solids. The chem. reactivity of these organolithium compounds was investigated, and several carbene complexes of Cr and W were prepared Pentachlorophenyllithium adds to furan and therefore represents a solid benzyne precursor. 1,1′-Dilithioferrocene.2TMEDA (TMEDA = N,N,N’,N’-tetramethylethylenediamine), ferrocenyllithium. TMEDA, and 2-lithio[(dimethylamino)methyl]-ferrocene were isolated and characterized as air-sensitive solids. An attempted formation of 2,2′-dilithiobiphenyl from 2,2′-dibromobiphenyl and BuLi yielded a mixture of ∼80% of this dilithium reagent and ca. 20% of 2-bromo-2′-lithiobiphenyl.

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Safety of Bromoferrocene. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Action of halogens on ferrocenylgold-triphenylphosphine.

Ph3P.AuC5H4FeC5H5 (I) brominated in CCl4 at -20° to a blue, then yellow material and after evaporation gave 55% bromoferrocene and 18% biferrocenyl along with 70% Ph3P.AuBr. Similar results were obtained at -50° in CH2Cl2. I chlorinated as above to 26% chloroferrocene, 70% biferrocenyl, and 98% Ph3P.AuCl. Iodination gave 82% iodoferrocene and 89% Ph3P.AuI.

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Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Related Products of 1273-73-0. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Electron-transfer properties of a nonheme manganese(IV)-oxo complex acting as a stronger one-electron oxidant than the iron(IV)-oxo analogue. Author is Yoon, Heejung; Morimoto, Yuma; Lee, Yong-Min; Nam, Wonwoo; Fukuzumi, Shunichi.

Electron-transfer properties of a nonheme Mn(iv)-oxo complex, [(Bn-TPEN)MnIV(O)]2+, reveals that Mn(iv)-oxo complex acts as a stronger 1-electron oxidant than the Fe(iv)-oxo analog. As a result, an electron transfer process in N-dealkylation was detected by a transient radical cation intermediate, para-Me-DMA√+, in the oxidation of para-Me-DMA by [(Bn-TPEN)MnIV(O)]2+.

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Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Application In Synthesis of Bromoferrocene. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Efficient Two-Electron Reduction of Dioxygen to Hydrogen Peroxide with One-Electron Reductants with a Small Overpotential Catalyzed by a Cobalt Chlorin Complex. Author is Mase, Kentaro; Ohkubo, Kei; Fukuzumi, Shunichi.

A Co chlorin complex (CoII(Ch)) efficiently and selectively catalyzed two-electron reduction of dioxygen (O2) by 1-electron reductants (ferrocene derivatives) to produce H2O2 (H2O2) in the presence of HClO4 (HClO4) in benzonitrile (PhCN) at 298 K. The catalytic reactivity of CoII(Ch) was much higher than that of a Co porphyrin complex (CoII(OEP), OEP2- = octaethylporphyrin dianion), which is a typical porphyrinoid complex. The two-electron reduction of O2 by 1,1′-dibromoferrocene (Br2Fc) was catalyzed by CoII(Ch), whereas virtually no reduction of O2 occurred with CoII(OEP). CoII(Ch) is more stable than CoII(OEP), where the catalytic turnover number (TON) of the two-electron reduction of O2 catalyzed by CoII(Ch) exceeded 30000. The detailed kinetic studies revealed that the rate-determining step in the catalytic cycle is the proton-coupled electron transfer reduction of O2 with the protonated CoII(Ch) ([CoII(ChH)]+) that is produced by facile electron-transfer reduction of [CoIII(ChH)]2+ by ferrocene derivative in the presence of HClO4. The 1-electron-reduction potential of [CoIII(Ch)]+ was pos. shifted from 0.37 V (vs. SCE) to 0.48 V by the addition of HClO4 due to the protonation of [CoIII(Ch)]+. Such a pos. shift of [CoIII(Ch)]+ by protonation resulted in enhancement of the catalytic reactivity of [CoIII(ChH)]2+ for the two-electron reduction of O2 with a lower overpotential as compared with that of [CoIII(OEP)]+.

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Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Application In Synthesis of Bromoferrocene. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Electrochemical Parameterization in Sandwich Complexes of the First Row Transition Metals. Author is Lu, Shuangxing; Strelets, Vladimir V.; Ryan, Matthew F.; Pietro, William J.; Lever, A. B. P..

Applying the ligand electrochem. parameter approach to sandwich complexes and standardizing to the FeIII/FeII couple, the authors obtained EL(L) values for over 200 π-ligands. Linear correlations exist between formal potential (E°) and the ∑EL(L) for each metal couple. In this fashion, the authors report correlation data for many first row transition metal couples. The correlations between the EL(L) of the substituted π-ligand and the Hammett substituent constants (σp) are also explored.

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Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com