Tag: M.W:200-300

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: quinoliniumhydrogensulphate( cas:530-66-5 ) is researched.Safety of quinoliniumhydrogensulphate.Popov, V. A.; Baboshin, Yu. V.; Belavina, I. G.; Cherkasov, N. Kh. published the article 《Conditions for extracting bases from the absorption fraction of coal tar》 about this compound( cas:530-66-5 ) in Uchenye Zapiski, Sverdlovskii Gosudarstvennyi Pedagogicheskii Institut. Keywords: extraction coal tar base; absorption oil extraction coal tar base; sulfuric acid tar base extraction; phosphoric acid tar base extraction. Let’s learn more about this compound (cas:530-66-5).

The extraction of heterocyclic nitrogenous bases from absorption oil fractions containing ∼9% bases, 10% naphthalene, and up to 10% phenols with 30% H2SO4 [7664-93-9] or 30% H3PO4 [7664-38-2] is described. H2SO4 has a higher extraction efficiency than H3PO4, but H3PO4 is less corrosive and has less tendency to gum formation. The removal of phenols during H2SO4 treatment is not so complete and this may double the amount of unextracted bases. The presence of phenols also increases the acid consumption. The solubility of the acid sulfate and monophosphate in the absorption oil fraction is ∼0.15% by volume at 20°. This value agrees with the residual after treatment with 80% excess H2SO4. Treatment with H3PO4 under similar conditions leads to a 10-fold increase in the residual unextracted bases.

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Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Zhurnal Prikladnoi Khimii (Sankt-Peterburg, Russian Federation) called Separation of quinaldine from a ternary mixture with quinoline and isoquinoline, Author is Belavina, I. G.; Potashnikov, M. M., which mentions a compound: 530-66-5, SMILESS is [O-]S(=O)(O)=O.C12=CC=C[NH+]=C1C=CC=C2, Molecular C9H9NO4S, Reference of quinoliniumhydrogensulphate.

The solubility relations of the monophosphate and bisulfate salts of quinaldine (I), quinoline (II), and isoquinoline (III) were studied. The solubility of the monophosphate of III in H2O at 25° is 6.7 times that of I or II. The solubility of the bisulfates of I and II was studied at 0-50° and 75-95% EtOH. At 10° and 85% EtOH, the solubility ratio of II to I is 3.8. I, 96% pure, was obtained from a mixture of I, II, and III by the following method. To 500 g. of a 1:1 mixture I (32%), II (20%), and III (40%) in MeOH was added 1 equivalent of H3PO4 (at <25°). To the precipitated salt was added just enough H2O to dissolve all of the phosphate of III. The remaining salt was decomposed in 20% NaOH yielding a 1:1 mixture of I and II. This was dissolved in 85% EtOH (1:1 ratio) and 1 equivalent of H2SO4 was added. The precipitated salt was recrystallized from 85% EtOH at 10°, decomposed with 10% base, extracted with benzene, and distilled to yield 58.8% I. I hope my short article helps more people learn about this compound(quinoliniumhydrogensulphate)Reference of quinoliniumhydrogensulphate. Apart from the compound(530-66-5), you can read my other articles to know other related compounds.

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Bromoferrocene(SMILESS: Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25,cas:1273-73-0) is researched.Formula: C27H36Cl2N2. The article 《Stable σH-adducts in reactions of ferrocenyllithium with azines》 in relation to this compound, is published in Russian Chemical Bulletin. Let’s take a look at the latest research on this compound (cas:1273-73-0).

Stable σH-adducts as intermediates of the nucleophilic substitution of H in 3-(2-pyridyl)-1,2,4-triazines were obtained using ferrocenyllithium as a nucleophilic reagent. The 3D structures of the reaction products were established by an x-ray diffraction study on 1-[4-ethyl-6-phenyl-3-(2-pyridyl)-5(H)-1,2,4-triazin-5-yl]ferrocene [monoclinic, space group P21/c, a 9.3471(8), b 20.7674(13), c 10.7865(10) Å, β 96.248(7)°, V 2081.4(3) Å3, Z 4].

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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 Nickel-Catalyzed Enantioselective Reductive Aryl Fluoroalkenylation of Alkenes, published in 2019-10-04, which mentions a compound: 1428537-19-2, mainly applied to nickel catalyzed enantioselective reductive aryl monofluoroalkenylation alkene; aryl bromide gem difluoroalkene monofluoroalkenylation; oxindole monofluoroalkenyl substituent preparation, HPLC of Formula: 1428537-19-2.

Enantioselective Ni-catalyzed reductive aryl monofluoroalkenylation of alkenes between aryl bromides and gem-difluoroalkenes has been developed. The reaction proceeding under room temperature and base-free reaction conditions tolerates a wide range of functional groups on both coupling partners. Various synthetically useful oxindoles containing monofluoroalkenyl substituent are obtained in good yields with 85%-95% enantiomeric excess. In addition, the synthetic method can be further applied to the late-stage monofluoroalkenylation of complex biol. active compounds

I hope my short article helps more people learn about this compound((R)-4-(tert-Butyl)-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole)HPLC of Formula: 1428537-19-2. Apart from the compound(1428537-19-2), you can read my other articles to know other related compounds.

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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.Zaworotko, Mike; Subramanian, S.; Macgillivray, L. R. researched the compound: quinoliniumhydrogensulphate( cas:530-66-5 ).HPLC of Formula: 530-66-5.They published the article 《Strategies for crystal engineering of polar solids》 about this compound( cas:530-66-5 ) in Materials Research Society Symposium Proceedings. Keywords: crystal engineering polar solid; hydrogen sulfate organic polar solid; cubane cluster polar solid; structure bisulfate cluster compound crystal. We’ll tell you more about this compound (cas:530-66-5).

Crystal engineering was invoked to design structural analogs of 2 prototypic SHG active solids, p-nitroaniline (pNA) and K dihydrogen phosphate (KDP). PNA exists as linear polar strands because of head-to-tail H bonding between adjacent mols. whereas KDP is a self-assembled H bonded diamond-type network that becomes polar when the H bonds align. The authors detail preparation and crystallog. characterization of 2 classes of multicomponent solid, organic cation H sulfates and co-crystals of the cubane cluster [M(CO)3(μ3-OH)]4, which structurally mimic pNA and KDP, resp. Several of the multi-component solids are polar and they represent a generic approach to designing new polar materials since 1 component can be changed without altering the basic architecture within the crystal.

There is still a lot of research devoted to this compound(SMILES：[O-]S(=O)(O)=O.C12=CC=C[NH+]=C1C=CC=C2)HPLC of Formula: 530-66-5, and with the development of science, more effects of this compound(530-66-5) can be discovered.

Reference:
Thiazolidine – Wikipedia,
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Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Organometallics called The anomalous electrochemistry of the ferrocenylamines, Author is Britton, Wayne E.; Kashyap, Ram; El-Hashash, Maher; El-Kady, Mohammed; Herberhold, Max, which mentions a compound: 1273-73-0, SMILESS is Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25, Molecular C10BrFe, COA of Formula: C10BrFe.

In the electrochem. of ferrocenylamines, the amine substituent acts as an unusually potent activating group for ferrocene oxidation, as shown by various Hammett-type correlations, with ferrocenylamine oxidizing at a potential 0.37 V more neg. than ferrocene itself. Triferrocenylamine, a compound with a nearly planar N, produces three reversible oxidation waves, the first of which is 0.31 neg. of ferrocene’s oxidation These and other data suggest that resonance interaction between ferrocene and the N lone pair is an important factor in ferrocene oxidation This contrasts with conclusions of earlier studies in which ferrocenes, with primarily electron-withdrawing groups, were examined

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Carre, Francis; Guerin, Christian; Henner, Bernard J. L.; Uerpmann, Carsten published an article about the compound: Bromoferrocene( cas:1273-73-0,SMILESS:Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25 ).HPLC of Formula: 1273-73-0. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:1273-73-0) through the article.

The synthesis of 1,1′-bis(N-tert-butyl-N-hydroxyamino)ferrocene (1) is described, and the x-ray anal. showed eclipsed positions of the two tert-butylhydroxyamino groups. This structure can be explained by the interactions of the hydroxyl hydrogens with the N atoms of the other tert-butylhydroxyamino group. This interaction is maintained in solution and may explain that the oxidation of 1 using Ag2O gave a decomposition reaction instead of the expected 1,1′-bis(N-tert-butylaminoxy)ferrocene. The ESR spectrum of an oxidized solution of 1 showed a 1:1:1 triplet, but it corresponded only to traces of an N-O• radical. Cyclic voltammograms of 1 showed that it is more easily oxidized than ferrocene and less easily than 1,1′-diaminoferrocene, indicating that chem. oxidation of 1 occurs in the ferrocenyl part of the mol., followed by rapid decomposition

From this literature《Synthesis, structure and reactivity study of 1,1′-bis(N-tert-butyl-N-hydroxyamino)ferrocene》,we know some information about this compound(1273-73-0)HPLC of Formula: 1273-73-0, but this is not all information, there are many literatures related to this compound(1273-73-0).

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Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 1273-73-0, is researched, SMILESS is Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25, Molecular C10BrFeJournal, Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov’t, Research Support, U.S. Gov’t, Non-P.H.S., Journal of the American Chemical Society called Enhanced Electron-Transfer Reactivity of Nonheme Manganese(IV)-Oxo Complexes by Binding Scandium Ions, Author is Yoon, Heejung; Lee, Yong-Min; Wu, Xiujuan; Cho, Kyung-Bin; Sarangi, Ritimukta; Nam, Wonwoo; Fukuzumi, Shunichi, the main research direction is enhanced electron transfer reactivity; nonheme manganese oxo complex binding scandium ions.Computed Properties of C10BrFe.

One and two scandium ions (Sc3+) are bound strongly to nonheme manganese(IV)-oxo complexes, [(N4Py)MnIV(O)]2+ (N4Py = N,N-bis(2-pyridylmethyl)-N-bis(2-pyridyl)methylamine) and [(Bn-TPEN)MnIV(O)]2+ (Bn-TPEN = N-benzyl-N,N’,N’-tris(2-pyridylmethyl)-1,2-diaminoethane), to form MnIV(O)-(Sc3+)1 and MnIV(O)-(Sc3+)2 complexes, resp. The binding of Sc3+ ions to the MnIV(O) complexes was examined by spectroscopic methods as well as by DFT calculations The one-electron reduction potentials of the MnIV(O) complexes were markedly shifted to a pos. direction by binding of Sc3+ ions. Accordingly, rates of the electron transfer reactions of the MnIV(O) complexes were enhanced as much as 107-fold by binding of two Sc3+ ions. The driving force dependence of electron transfer from various electron donors to the MnIV(O) and MnIV(O)-(Sc3+)2 complexes was examined and analyzed in light of the Marcus theory of electron transfer to determine the reorganization energies of electron transfer. The smaller reorganization energies and much more pos. reduction potentials of the MnIV(O)-(Sc3+)2 complexes resulted in remarkable enhancement of the electron-transfer reactivity of the MnIV(O) complexes. Such a dramatic enhancement of the electron-transfer reactivity of the MnIV(O) complexes by binding of Sc3+ ions resulted in the change of mechanism in the sulfoxidation of thioanisoles by MnIV(O) complexes from a direct oxygen atom transfer pathway without metal ion binding to an electron-transfer pathway with binding of Sc3+ ions.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Convenient synthesis of some halo ferrocenes》. Authors are Fish, R. W.; Rosenblum, M..The article about the compound:Bromoferrocenecas:1273-73-0,SMILESS:Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25).COA of Formula: C10BrFe. Through the article, more information about this compound (cas:1273-73-0) is conveyed.

Chloromercuriferrocenes were transformed to halo ferrocenes by treatment with pos. halogen reagents in polar media. Thus, N-bromo-and N-iodosuccinimide afforded bromo-and iodoferrocene, resp. 1,1′-Dibromoferrocene (I) was similarly obtained from 1,1′-bis(chloromercuri)ferrocene. The direct conversion of ferrocene to I, without isolation of the intermediate chloromercuri derivative, was feasible.

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

cf. CA 51, 9514b. Heating 0.3 g. bromoferrocene (I) with 1.8 g. Ph4BCu.C5H5N under N 0.5 hr. at 125-30° gave after extraction with Et2O and chromatography on Al2O3 in heptane 57% phenylferrocene; a 56% yield resulted from a similar reaction with I and Ph4BK in the presence of Cu2Br2moistened with pyridine. The reaction also gave some ferrocene (II), biferrocenyl, and probably polyphenylferrocenes. Similarly, (p-MeC6H4)4BNa and Cu2Br2 gave 53% p-tolylferrocene, while tetra-α-thienylboropotassium gave 81% α-thienylferrocene (III), m. 116.5-17.5°. Heating I with N-sodiopyrrole in the presence of Cu2Br2 0.5 hr. at 120° gave some II, 17% N-pyrrylferrocene, m. 83-3.5° (after sublimation in vacuo), and biferrocenyl. Tetra-1-indolylboropotassium similarly gave 35% N-indolylferrocene, m. 89-90°. Refluxing I with PhCCCu in Me2NCHO 3 hrs. under N gave 48% ferrocenylphenylacetylene, m. 126-7°.

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