Month: March 2022

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: cis-Cyclohexane-1,2-dicarboxylic acid( cas:610-09-3 ) is researched.Product Details of 610-09-3.Thuery, Pierre; Atoini, Youssef; Harrowfield, Jack published the article 《Counterion-Controlled Formation of an Octanuclear Uranyl Cage with cis-1,2-Cyclohexanedicarboxylate Ligands》 about this compound( cas:610-09-3 ) in Inorganic Chemistry. Keywords: uranyl cyclohexanedicarboxylate complex preparation luminescence; crystal structure uranyl cyclohexanedicarboxylate. Let’s learn more about this compound (cas:610-09-3).

Cis-1,2-Cyclohexanedicarboxylic acid (c-chdcH2) was reacted with uranyl nitrate under (solvo-)hydrothermal conditions in the presence of different possible counterions. Two neutral complexes of 1:1 stoichiometry were obtained, [UO2(c-chdc)(DMF)] (1) and [UO2(c-chdc)(H2O)] (2), which crystallize as two-dimensional coordination polymers and do not include the addnl. cations present in solution In contrast, the complex [NH4][PPh4][(UO2)8(c-chdc)9(H2O)6]•3H2O (3) crystallized in the presence of PPh4Br, ammonium cations being generated in situ from acetonitrile hydrolysis. This complex of 8:9 uranium:ligand stoichiometry contains an octanuclear anionic cage of D3 symmetry with a pseudo-cubic arrangement of uranium atoms. The ammonium cation is held within the cage through four hydrogen bonds with uranyl oxo groups directed inwards. This cage complex is luminescent, although with a low quantum yield of 0.06, indicating some potential as a photo-oxidant of included species.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Hijji, Yousef; Benjamin, Ellis; Jasinski, Jerry P.; Butcher, Ray J. published the article 《Crystal structure of the thalidomide analog (3aR*,7aS*)-2-(2,6-dioxopiperidin-3-yl)hexahydro-1H-isoindole-1,3(2H)-dione》. Keywords: isoindole thalidomide analog crystal structure; crystal structure; pseudomerohedral twinning; thalidomide analogs.They researched the compound: cis-Cyclohexane-1,2-dicarboxylic acid( cas:610-09-3 ).Recommanded Product: cis-Cyclohexane-1,2-dicarboxylic acid. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:610-09-3) here.

The title compound, C13H16N2O4, crystallizes in the monoclinic centrosym. space group, P21/c, with four mols. in the asym. unit, thus there is no crystallog. imposed symmetry and it is a racemic mixture The structure consists of a six-membered unsaturated ring bound to a five-membered pyrrolidine-2,5-dione ring N-bound to a six-membered piperidine-2,6-dione ring and thus has the same basic skeleton as thalidomide, except for the six-membered unsaturated ring substituted for the aromatic ring. In the crystal, the mols. are linked into inversion dimers by R22(8) hydrogen bonding involving the N-H group. In addition, there are bifurcated C-H···O interactions involving one of the O atoms on the pyrrolidine-2,5-dione with graph-set notation R12(5). These interactions along with C-H···O interactions involving one of the O atoms on the piperidine-2,6-dione ring link the mols. into a complex three-dimensional array. There is pseudomerohedral twinning present which results from a 180° rotation about the [100] reciprocal lattice direction and with a twin law of 1 0 0 0 [inline formula omitted] 0 0 0 [inline formula omitted] [BASF 0.044 (1)].

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Electrosynthesis of 2-(1,3,4-Oxadiazol-2-yl)aniline Derivatives with Isatins as Amino-Attached C1 Sources, the main research direction is oxadiazolyl aniline electrosynthesis intramol decarboxylative coupling isatin hydrazine.Recommanded Product: 2-Furoic hydrazide.

An intramol. decarboxylative coupling reaction for the construction of 2-(1,3,4-oxadiazol-2-yl)aniline derivatives was developed from readily available isatins and hydrazides by virtue of electrochem. In this reaction, isatins were employed as amino-attached C1 sources, providing a variety of 2-(1,3,4-oxadiazol-2-yl)aniline derivatives with moderate to good yields.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: cis-Cyclohexane-1,2-dicarboxylic acid( cas:610-09-3 ) is researched.Product Details of 610-09-3.Huang, Fu-Ping; Lei, Jing-Bin; Yu, Qing; Bian, He-Dong; Yan, Shi-Ping published the article 《The structural diversity and luminescent properties of Zn(II) coordination assemblies with cyclohexane (or cyclohexene) dicarboxylate anions and two positional isomeric ligands》 about this compound( cas:610-09-3 ) in Polyhedron. Keywords: preparation zinc cyclohexene cyclohexane carboxylate bispyridyltriazole coordination polymer; crystal structure zinc cyclohexene cyclohexane carboxylate bispyridyltriazole coordination polymer; luminescence zinc cyclohexene cyclohexane carboxylate bispyridyltriazole coordination polymer. Let’s learn more about this compound (cas:610-09-3).

Four Zn(II) coordination polymers, {[Zn(chedc)(4,4′-Hbpt)]}n (1), {[Zn3(chadc)2(4,4′-Hbpt)2(4,4′-bpt)2]·3H2O}n (2), {[Zn2(chadc)2(3,3′-Hbpt)]}n (3) and {[Zn2(chedc)2(3,3′-Hbpt)]·H2O}n (4) (chadc = cis-1,2-cyclohexanedicarboxylate anion, chedc = cis-4-cyclohexene-1,2-dicarboxylate anion, 4,4′-Hbpt = 1H-3,5-bis(4-pyridyl)-1,2,4-triazole, 3,3′-Hbpt = 1H-3,5-bis(3-pyridyl)-1,2,4-triazole) were produced by the reaction of two positional isomeric dipyridyl bridging ligands and two dicarboxylate anions with Zn(II) salts under hydrothermal conditions. Structural anal. reveals that 1 exhibits a double-chain and 2 exhibits a 3-dimensional network with a (62.10)2(64.102) topol., while 3 and 4 show similar layer structures. The luminescent properties of these complexes were briefly studied.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

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: 610-09-3, is researched, SMILESS is O=C([C@H]1[C@@H](C(O)=O)CCCC1)O, Molecular C8H12O4Journal, Article, Journal of Chromatography A called Preparative separation of isomeric and stereoisomeric dicarboxylic acids by pH-zone-refining counter-current chromatography, Author is Weisz, Adrian; Idina, Ana; Ben-Ari, Julius; Karni, Miriam; Mandelbaum, Asher; Ito, Yoichiro, the main research direction is dicarboxylic acid isomeric stereoisomer pH zone refining countercurrent chromatog.Product Details of 610-09-3.

This work involves the preparative separation of some isomeric dicarboxylic acids using pH-zone-refining countercurrent chromatog. (CCC), a relatively new preparative technique for the separation of ionizable compounds The paper concentrates especially on the separation of a synthetic mixture of closely related cis and trans pairs of 1-methyl- and 1,3-dimethyl-1,3-cyclohexanedicarboxylic acids. The elution sequence of the isomers is discussed in terms of their relative acidities (pKa values) in solution and gas phase, hydrophobicities, and steric configuration. Two possible explanations are suggested for the mechanism of separation They both involve the amount of retainer acid used, as it affects the separation and plays a role in the chemohydrodynamic equilibrium of the dicarboxylic acids in the column.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

COA of Formula: C8H12O4. 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: cis-Cyclohexane-1,2-dicarboxylic acid, is researched, Molecular C8H12O4, CAS is 610-09-3, about Comparison of aromatic and aliphatic dicarboxylic acid in reactivity using hydrogen-isotope exchange reaction in a gas-solid system. Author is Imaizumi, Hiroshi; Muramatsu, Kazuo.

The hydrogen-isotope exchange reaction between aromatic (alicyclic, or normal chain aliphatic) dicarboxylic acid (solid) and HTO vapor was observed at 40 °C ∼ 80° to reveal the reactivity of the material having the same two functional groups. The A””-McKay plot method was used to determine its rate constant From the rate constants thus determined, the following three findings have been clarified in the reaction. (1) The reactivity of aromatic dicarboxylic acid is similar to that of normal chain aliphatic dicarboxylic acid, and is greater than that of alicyclic acid. (2) With regard to 1,2- or 1,4-cyclohexanedicarboxylic acid, cis-isomer is similar to trans-isomer in reactivity. (3) The reactivity of isophthalic acid is larger than that of benzoic acid, and seems to follow the Hammett LFER.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

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, Journal of the American Chemical Society called Improved synthesis of cis-Δ4-tetrahydrophthalic anhydride and cis-hexahydrophthalic acid, Author is Jenkins, Edward F.; Costello, Edward J., which mentions a compound: 610-09-3, SMILESS is O=C([C@H]1[C@@H](C(O)=O)CCCC1)O, Molecular C8H12O4, Safety of cis-Cyclohexane-1,2-dicarboxylic acid.

Maleic anhydride (1 mole) in 150 ml. C6H6, cooled to 5°, 54 g. liquid (CH2:CH)2 added, and the mixture heated to 115° (within 15 min. the temperature rises to 145° and the pressure to 11 atm.) and allowed to stand overnight, gives 90% cis-Δ4-tetrahydrophthalic anhydride (I), m. 103-4°. I (30.4 g.) in 150 ml. AcOH, hydrogenated 0.5 hr. over 200 mg. Pt oxide at room temperature and 4.5 atm., and the mixture boiled with H2O, gives 90% cis-hexahydrophthalic acid, m. 190-1°.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Rodrigues, Daniel A.; Guerra, Fabiana S.; Sagrillo, Fernanda S.; Pinheiro, Pedro de Sena M.; Alves, Marina A.; Thota, Sreekanth; Chaves, Lorrane S.; Sant’Anna, Carlos M. R.; Fernandes, Patricia D.; Fraga, Carlos A. M. published an article about the compound: 2-Furoic hydrazide( cas:3326-71-4,SMILESS:O=C(C1=CC=CO1)NN ).Computed Properties of C5H6N2O2. 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:3326-71-4) through the article.

Targeting histone deacetylases (HDACs) and phosphatidylinositol 3-kinases (PI3Ks) is a very promising approach for cancer treatment. This manuscript describes the design, synthesis, in vitro pharmacol. profile, and mol. modeling of a novel class of N-acylhydrazone (NAH) derivatives that act as HDAC6/8 and PI3Kα dual inhibitors. The surprising selectivity for PI3Kα may be related to differences in the conformation in the active site. Cellular studies showed that these compounds act in HDAC6 inhibition and the PI3/K/AKT/mTOR pathway. The compounds that are selective for inhibition of HDAC6/8 and inhibit PI3Kα show potential for the treatment of cancer.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

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: 3326-71-4, is researched, SMILESS is O=C(C1=CC=CO1)NN, Molecular C5H6N2O2Journal, Journal of Molecular Structure called A new fluorescent chemosensor for Al(III) detection with highly selective in aqueous solution and solid test paper, Author is Xiu, Deping; Shi, Junjie; Deng, Miaoran; Song, Huihua; Hao, Zhiqiang; Feng, Qi; Yu, Haitao, the main research direction is fluorescent chemosensor Al detection test paper.Category: benzisoxazole.

A new fluorescent chemosensor (I) based on salicylaldehyde hydrazide was facilely synthesized through one-step reaction, which exhibited turn-on fluorescent response to Al(III) with 18-fold fluorescence enhancement in aqueous solution at pH 5.5. The binding stoichiometry of 1 toward Al(III) was in 1:1. High selectivity and sensitivity to Al(III) were achieved, which featured a detection limit of 67 nmol L-1 and a linear rang of 1-10 μmol L-1. More importantly, the sensing process could be also performed on solid test paper. After the addition of Al(III), a significant emission color change from yellow to cyan was observed by naked eye due to the intrinsic aggregation-induced emission (AIE) characteristic of 1.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Electric Literature of C7H5Cl2NO2. 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: Methyl 2,4-dichloronicotinate, is researched, Molecular C7H5Cl2NO2, CAS is 442903-28-8, about Long-lived states to sustain SABRE hyperpolarised magnetisation.

The applicability of the magnetic resonance (MR) technique in the liquid phase is limited by poor sensitivity and short nuclear spin coherence times which are insufficient for many potential applications. Here the authors illustrate how it is possible to address both of these issues simultaneously by harnessing long-lived hyperpolarized spin states that are formed by adapting the Signal Amplification by Reversible Exchange (SABRE) technique. The authors achieve >4% net 1H-polarization in a long-lived form that remains detectable for over ninety seconds by reference to proton pairs in the biol. important mol. nicotinamide and a pyrazine derivative whose in vivo imaging will offer a new route to probe disease in the future.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics