Month: April 2022

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, European Journal of Organic Chemistry called Unprecedented Asymmetric Epoxidation of Isolated Carbon-Carbon Double Bonds by a Chiral Fluorous Fe(III) Salen Complex: Exploiting Fluorophilic Effect for Catalyst Design, Author is Kobayashi, Yuki; Obayashi, Riho; Watanabe, Yuki; Miyazaki, Hiroki; Miyata, Issei; Suzuki, Yuta; Yoshida, Yukihiro; Shioiri, Takayuki; Matsugi, Masato, which mentions a compound: 19777-66-3, SMILESS is C[C@H](N)CN.[H]Cl.[H]Cl, Molecular C3H12Cl2N2, Name: (S)-Propane-1,2-diamine dihydrochloride.

The first asym. epoxidation of isolated carbon-carbon double bonds by a chiral salen complex using ubiquitous Fe(III) as a center-metal was described. By simultaneously introducing fluorous tags and tert-Bu groups into the ligand of the salen complex, asym. epoxidation was achieved. The fluorous tags act as both the electron-withdrawing groups, to improve the catalytic activity for oxidation, and the driving force to form a unique asym. stereo environment. Crystallog. anal. of the complex revealed that the catalyst has a distinctive umbrella structure based on intramol. fluorophilic effect. This is the first example of asym. catalytic space construction that exploits fluorous space-interaction of neighboring fluorous tags.

Here is just a brief introduction to this compound(19777-66-3)Name: (S)-Propane-1,2-diamine dihydrochloride, more information about the compound((S)-Propane-1,2-diamine dihydrochloride) is in the article, you can click the link below.

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Recommanded Product: 8-Hydroxyquinoline 1-oxide. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 8-Hydroxyquinoline 1-oxide, is researched, Molecular C9H7NO2, CAS is 1127-45-3, about Lanthanide and actinide complexes with bidentate ligands. Crystal structure of dimethylformamidetetrakis(1-oxo-2-thiopyridinato)thorium(IV). Author is Casellato, U.; Sitran, S.; Tamburini, S.; Vigato, P. A.; Graziani, R..

UO2L2L’.xL’ (HL = 2-hydroxypyridine-N-oxide, 2-mercaptopyridine-N-oxide (I), 8-hydroxyquinoline-N-oxide, L’ = H2O, MeOH, Ph3PO, DMSO, Me2NAc, DMF, x = 0, 1), ThL4.xL1, ThL4L1.xL1, LaL3.xL1, and Li[LaL4].xL1 were prepared Crystals of ThL4(DMF) (HL = I), are orthorhombic, space group P212121, with a 10.514(6), b 11.024(7), c 24.56(1) Å, and d.(calculated) = 1.88 g cm-3 for Z = 4. The final conventional R was 0.056 based on the 2354 observed reflections. Four bidentate ligands and 1 DMF are bonded to Th to form a distorted monocapped square antiprismatic coordination polyhedron. The Th-S distances are 2.94-2.99 Å (mean 2.97 Å). The Th-O bond distance of 2.52 Å to DMF is significantly longer than the 4 Th-O(pyOS) bond distances (mean 2.40 Å).

Here is just a brief introduction to this compound(1127-45-3)Recommanded Product: 8-Hydroxyquinoline 1-oxide, more information about the compound(8-Hydroxyquinoline 1-oxide) is in the article, you can click the link below.

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Quinoxaline – Wikipedia,
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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Oxine N-oxide as an analytical reagent for the colorimetric estimation of Ce(IV) and its comparison with 8-quinolinol as a chelating agent》. Authors are Bhat, A. N.; Jain, B. D..The article about the compound:8-Hydroxyquinoline 1-oxidecas:1127-45-3,SMILESS:OC1=CC=CC2=CC=C[N+]([O-])=C12).Formula: C9H7NO2. Through the article, more information about this compound (cas:1127-45-3) is conveyed.

Aqueous solutions of Ce(IV) salts form stable brownish red H2O-soluble complexes when combined with alc. oxine N-oxide. The absorption is measured at 420 mμ, and Beer’s law is obeyed to 9.0 p.p.m. Ce. Th, U, and F- interfere and must be removed.

Here is just a brief introduction to this compound(1127-45-3)Formula: C9H7NO2, more information about the compound(8-Hydroxyquinoline 1-oxide) is in the article, you can click the link below.

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Quinoxaline – Wikipedia,
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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: Chloro(1,5-cyclooctadiene)copper(I) dimer, is researched, Molecular C16H16Cl2Cu2, CAS is 32717-95-6, about Oxazepine Synthesis by Copper-Catalyzed Intermolecular Cascade Reactions between O-Propargylic Oximes and Dipolarophiles.Name: Chloro(1,5-cyclooctadiene)copper(I) dimer.

Oxazepines I [R1 = n-Pr, cyclohexyl, Ph, 4-F3CC6H4, 4-MeOC6H4; R2 = n-Pr, Me3SiCH2, Ph, 4-MeOC6H4, 4-F3CC6H4; R3 = H, 4-F3CC6H4; R5 = H, R4R6 = C(O)NR7C(O), R7 = H, Me, t-Bu, Ph, etc.; R4 = H, R5 = R6 = MeO2C, i-PrO2C; etc.] were efficiently prepared from O-propargylic oximes II and dipolarophiles R4R5C:CHR6 via copper-catalyzed cascade reactions which proceed through a 2,3-rearrangement, [3 + 2] cycloaddition, and subsequent 1,3-oxygen migration. The process involves the cleavage of C-O and N-O bonds.

Here is just a brief introduction to this compound(32717-95-6)Name: Chloro(1,5-cyclooctadiene)copper(I) dimer, more information about the compound(Chloro(1,5-cyclooctadiene)copper(I) dimer) is in the article, you can click the link below.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Category: quinoxaline. 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: 1-(Bromomethyl)-4-ethylbenzene, is researched, Molecular C9H11Br, CAS is 57825-30-6, about Synthesis of Isothiochroman-3-ones via Metal-Free Oxidative Cyclization of Alkynyl Thioethers. Author is Zhang, Ying-Qi; Zhu, Xin-Qi; Chen, Yang-Bo; Tan, Tong-De; Yang, Ming-Yang; Ye, Long-Wu.

A novel Bronsted acid-catalyzed oxidative C-H functionalization of alkynyl thioethers has been developed. This method allows the practical synthesis of valuable isothiochroman-3-ones in mostly moderate to good yields under mild reaction conditions and features a broad substrate scope and wide functional group tolerance. Moreover, this metal-free oxidation can also be used to promote formal N-H insertion involving an unexpected 1,2-sulfur migration, affording useful 1,4-benzothiazin-3-ones.

Here is just a brief introduction to this compound(57825-30-6)Category: quinoxaline, more information about the compound(1-(Bromomethyl)-4-ethylbenzene) is in the article, you can click the link below.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Determination and comparison of the stability constants of some metal complexes of 8-hydroxyquinoline N-oxide and 8-hydroxyquinoline, published in 1970, which mentions a compound: 1127-45-3, Name is 8-Hydroxyquinoline 1-oxide, Molecular C9H7NO2, Safety of 8-Hydroxyquinoline 1-oxide.

The stability constant of 8-hydroxyquinoline 1-oxide (or “”oxine N-oxide””) complexes with MnII, FeII, CoII, NiII, CuII, ZnII, CdII, UO2II, AlIII, FeIII, YIII, LaIII, CeIII, PrIII, NdIII, SmIII, GdIII, DyIII, HoIII, ErIII, TmIII, YbIII, and LuIII, and oxine complexes with LnIII and YIII were determined by using pH-metric titrations in 50 volume % aqueous dioxane in the presence of 0.30M NaClO4 as the constant ionic medium. With both the ligands, the “”Gd break”” is observed in the case of the lanthanon (Ln) complexes, whereas the bivalent ion complexes follow the Irving-Williams order of stability constant in the case of the oxine complexes. The stability constant of the oxine complexes were larger than those of the N-oxide complexes, though the oxine anion is only 5 times as basic as the N-oxide anion. A possible explanation for the increased stability of the oxine complexes in comparison with the corresponding N-oxide derivative is proposed.

Here is just a brief introduction to this compound(1127-45-3)Safety of 8-Hydroxyquinoline 1-oxide, more information about the compound(8-Hydroxyquinoline 1-oxide) is in the article, you can click the link below.

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Quinoxaline – Wikipedia,
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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Thermal decomposition of nickel and zinc fluoride tetrahydrates, the main research direction is decomposition nickel fluoride hydrate; zinc fluoride hydrate decomposition.SDS of cas: 13940-83-5.

NiF2.4H2O decomposes in 3 steps when heated. In dry air or Ar atm. NiF2.H2O is formed at ∼125°, but H2O and HF are lost and NiOHF.3NiF2 is formed at ∼225°. NiOHF.3NiF2 loses another mol. of HF at ∼430° and the final product is a mixture of NiF2 and NiO in 3:1 mole ratio. In the presence of H2O, the final product is NiO, the other steps being the same. ZnF2.4H2O loses H2O at >75° to give anhydrous ZnF2.

Here is just a brief introduction to this compound(13940-83-5)SDS of cas: 13940-83-5, more information about the compound(Nickel(ii)fluoridetetrahydrate) is in the article, you can click the link below.

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Quinoxaline – Wikipedia,
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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 Mixed ligand complexes of copper glycinate with oxine, its derivatives and oxine-N-oxide, published in 2005, which mentions a compound: 1127-45-3, mainly applied to copper glycinate hydroxyquinoline oxide complex preparation, Product Details of 1127-45-3.

Mixed ligand complexes CuL2.L’ (HL = glycine, L’ = oxine or 8-hydroxyquinoline, 5,7-dichlorooxine, 5,7-dibromooxine, 5,7-diiodooxine, 5,7-dinitrooxine and oxine-N-oxide) were prepared by the reaction of Cu(II) glycinate with oxine, its derivatives and oxine-N-oxide. IR spectral datas indicate coordination of glycine is through the N and O atoms in neutral complex (Cu glycinate). It also indicates H-bonding in them, coordination of L’ through the OH and heterocyclic N atoms. The UV-spectroscopy and magnetic susceptibility values suggest the octahedral structure for these complexes. Very low values of molar conductivity show they are nonelectrolytes.

Here is just a brief introduction to this compound(1127-45-3)Product Details of 1127-45-3, more information about the compound(8-Hydroxyquinoline 1-oxide) is in the article, you can click the link below.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

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: 57825-30-6, is researched, SMILESS is CCC1=CC=C(CBr)C=C1, Molecular C9H11BrJournal, Article, Research Support, Non-U.S. Gov’t, Bioorganic & Medicinal Chemistry Letters called C5-Modified nucleosides exhibiting anticancer activity, Author is Lee, Yoon-Suk; Park, Sun Min; Kim, Hwan Mook; Park, Song-Kyu; Lee, Kiho; Lee, Chang Woo; Kim, Byeang Hyean, the main research direction is nucleoside synthesis iododeoxyuridine human antitumor click cycloaddition isoxazole triazole.Category: quinoxaline.

We describe (i) a simple method for the synthesis of C5-modified nucleosides, e.g. I, from 5-iodo-2′-deoxyuridine and (ii) their activity against six types of human cancer cell lines (HCT15, MM231, NCI-H23, NUGC-3, PC-3, ACHN). We generated nitrile oxides in situ from oximes using a com. bleaching agent; their cycloaddition with 5-ethynyl-2′-deoxyuridine yielded isoxazole derivatives possessing activity against the cancer cell lines. We synthesized several azides from benzylic bromides and their click reactions with 5-ethynyl-2′-deoxyuridine provided triazole derivatives

Here is just a brief introduction to this compound(57825-30-6)Category: quinoxaline, more information about the compound(1-(Bromomethyl)-4-ethylbenzene) is in the article, you can click the link below.

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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider

Yasui, Takeshi; Tatsumi, Rine; Yamamoto, Yoshihiko published an article about the compound: (R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine( cas:221012-82-4,SMILESS:COC(C=C1P(C2=CC=CC=C2)C3=CC=CC=C3)=NC(OC)=C1C4=C(OC)N=C(OC)C=C4P(C5=CC=CC=C5)C6=CC=CC=C6 ).Computed Properties of C38H34N2O4P2. 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:221012-82-4) through the article.

Dual cobalt and photoredox catalysis enabled [2+2+2] cycloaddition of enediynes to produce tricyclic cyclohexadienes bearing a quaternary bridgehead carbon was reported. A variety of enediynes were used, and the corresponding cyclohexadienes were obtained in good to high yields. The use of a chiral ligand, (S)-Segphos, enabled a highly enantioselective reaction allowing access to highly enantio-enriched cyclohexadienes.

Here is just a brief introduction to this compound(221012-82-4)Computed Properties of C38H34N2O4P2, more information about the compound((R)-2,2′,6,6′-Tetramethoxy-4,4′-bis(diphenylphosphino)-3,3′-bipyridine) is in the article, you can click the link below.

Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider