Category: 610-09-3

Related Products of 610-09-3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: cis-Cyclohexane-1,2-dicarboxylic acid, is researched, Molecular C8H12O4, CAS is 610-09-3, about Solvolytic reactions of cyclic anhydrides in anhydrous acetic acid. Author is Haddadin, M. J.; Higuchi, T.; Stella, V..

The reversible reactions of several cyclic anhydrides with HOAc to form Ac2O and the corresponding dicarboxylic acid, catalyzed by HClO4 at 25°, were studied. The equilibrium constants calculated from spectral data, were 4.85 × 10-4, 1.08 × 10-1, and 4.6 × 10-1 M for succinic, trans-1,2-cyclohexanedicarboxyllic, and glutaric anhydrides, resp. Maleic, phthalic, and cis-1,2-cyclohexanedicarboxylic anhydrides did not undergo any detectable reaction with HOAc under these conditions, suggesting still higher stability. The reverse rate constants were relatively independent of the structure of the attacking diacid, while the forward rate constants were found to parallel the equilibrium constants The rate-determining step for the forward reaction appears to be the breakdown of the tetrahedral intermediate formed by the attack of HOAc mol. on the protonated cyclic anhydride.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 610-09-3, is researched, Molecular C8H12O4, about Reduction mechanism of cyclohexene-1,2-dicarboxylic acid, the main research direction is electrochem reduction kinetics cyclohexenedicarboxylic acid; mechanism electrochem reduction cyclohexenedicarboxylic acid; stereochem electrochem reduction cyclohexenedicarboxylic acid; cyclohexanedicarboxylic acid.SDS of cas: 610-09-3.

Reduction mechanism of cyclohexene-1,2-dicarboxylic acid (I) was polarog. examined at pH 0-6. The first of the 3 waves that appeared was due to the adsorption of the product in strongly acid media. The 2nd wave was interpreted as due to a CEC (chem.-electrode-chem.) process involving preprotonation of the acid. The 3rd wave that appeared only in weakly acid media involved a CEC mechanism by which the free acid was reduced. The rate constant of the protonation of the monoanion from I was calculated Controlled-potential electrolysis produced a mixture of trans- and cis-cyclohexanedicarboxylic acid in high yield at pH 0-6. The stereoisomeric ratio of the products was influenced by pH; this was due to the difference of the stability of the reaction intermediates.

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Benzisoxazole – 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 《FT-IR and FT-Raman spectroscopy study of the cyclic anhydride intermediates for the esterification of cellulose. Part 3. Cyclic anhydrides formed by the isomers of cyclohexanedicarboxylic acid》. Authors are Yang, Charles Q.; Zhang, Guobao.The article about the compound:cis-Cyclohexane-1,2-dicarboxylic acidcas:610-09-3,SMILESS:O=C([C@H]1[C@@H](C(O)=O)CCCC1)O).Application In Synthesis of cis-Cyclohexane-1,2-dicarboxylic acid. Through the article, more information about this compound (cas:610-09-3) is conveyed.

Multifunctional carboxylic acids were used as crosslinking agents for cotton and wood pulp cellulose. In the authors’ previous research, the authors found that a polycarboxylic acid esterifies cellulose through the formation of a 5-membered cyclic anhydride intermediate by the dehydration of 2 carboxyl groups. The authors studied the formation of those cyclic anhydride intermediates by different isomers of cyclohexanedicarboxylic acid (CHA) so that the authors can elucidate the effects of mol. structure on the formation of the anhydride intermediates. The authors found that both cis- and trans-1,2-CHA form 5-membered anhydride intermediates when temperature reaches their m.p. and that cis-1,2-CHA forms the cyclic anhydride at temperatures lower than does trans-1,2-CHA. 1,3-CHA forms 6-membered cyclic anhydride at temperatures much higher than its m.p. The formation of a 5-membered cyclic anhydride intermediates takes place at temperatures lower than that of a 6-membered anhydride. This is probably the main reason why those polycarboxylic acids with their carboxylic acid groups bonded to the adjacent carbons of the mol. backbones are more effective crosslinking agents for cellulose than those with their carboxylic groups bonded to the alternative carbons. No formation of cyclic anhydride was found for 1,4-CHA. The formation of a 5-membered cyclic anhydride was accelerated by monosodium phosphate, which is used as a catalyst for the esterification of cotton cellulose by polycarboxylic acids.

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Benzisoxazole – Wikipedia,
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Synthetic Route of C8H12O4. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: cis-Cyclohexane-1,2-dicarboxylic acid, is researched, Molecular C8H12O4, CAS is 610-09-3, about Counterion-Controlled Formation of an Octanuclear Uranyl Cage with cis-1,2-Cyclohexanedicarboxylate Ligands. Author is Thuery, Pierre; Atoini, Youssef; Harrowfield, Jack.

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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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 Organic Chemistry called Hunsdiecker reaction of silver salts of cis- and trans-1,2-cyclohexanedicarboxylic acid, Author is Abell, Paul I., which mentions a compound: 610-09-3, SMILESS is O=C([C@H]1[C@@H](C(O)=O)CCCC1)O, Molecular C8H12O4, Electric Literature of C8H12O4.

Decarboxylation of the Ag salts of cis- and trans-1,2-cyclohexanedicarboxylic acids (I, Ia) by the action of halogen according to Hunsdiecker, et al. (C.A. 38, 374), gave only trans-1,2-dibromocyclohexane (IIa) through isomerization which appeared to take place at an intermediate stage in the reaction. Com. cis-1,2-cyclohexanedicarboxylic anhydride hydrolyzed in boiling H2O gave I, m. 191-4°, isomerized by heating 8 hrs. at 170-80° with a small amount of dilute HCl in a sealed tube to yield 61.5% Ia, m. 228.5-30.5° (from EtOH). Carefully neutralized solutions of the Na salts of I and Ia treated with an exactly equivalent quantity of aqueous AgNO3 and filtered, the precipitate carefully washed with H2O, alc., and Et2O, dried several days over P2O5 in vacuo, and screened to 100 mesh gave Ag salts (III, IIIa) suitable for reaction with Br. Reaction of III and IIIa with Br was carried out at various temperatures by the inverse addition procedure of Conly (C.A. 48, 2561b) in which the dry III or IIIa was added to Br in CCl4, in an apparatus in which the speed and extent of the reaction were followed by observation of the CO2 evolved. The products of the reaction were tabulated (Ag salt, temperature of reaction, % yield, m.p. IIa, n25D, and structure as shown by infrared spectrum given): III, 0-25°, 43, -4.8°, 1.5503, all trans; III, reflux, 47, -4.7°, 1.5505, all trans; IIIa, 0-25°, 48, -4.5°, 1.5507, all trans; IIIa, reflux, 37, -2.5°, 1.5510, all trans. To establish the stability to isomerization under the above exptl. conditions, known cis-1,2-dibromocyclohexane (II) and IIa were refluxed 12 hrs. with Br and AgBr. II, m. 10.0°, n25D 1.5512, was recovered with a 60% yield of material, m. 6.5°, n25D 1.5511, all cis; and IIa, m. -4.5°, n25D 1.5505, similarly yielded 94% material, m. -4.5°, n25D 1.5505, all trans. Although the data did not distinguish partial isomerization from complete retention of configuration a very large proportion of II survived the reaction. No isomerization of II took place on 12 hrs. refluxing with Br and AgBr in anhydrous CCl4. The mechanistic implications were discussed briefly.

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Benzisoxazole – 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 《Hunsdiecker reaction of silver salts of cis- and trans-1,2-cyclohexanedicarboxylic acid》. Authors are Abell, Paul I..The article about the compound:cis-Cyclohexane-1,2-dicarboxylic acidcas:610-09-3,SMILESS:O=C([C@H]1[C@@H](C(O)=O)CCCC1)O).Application of 610-09-3. Through the article, more information about this compound (cas:610-09-3) is conveyed.

Decarboxylation of the Ag salts of cis- and trans-1,2-cyclohexanedicarboxylic acids (I, Ia) by the action of halogen according to Hunsdiecker, et al. (C.A. 38, 374), gave only trans-1,2-dibromocyclohexane (IIa) through isomerization which appeared to take place at an intermediate stage in the reaction. Com. cis-1,2-cyclohexanedicarboxylic anhydride hydrolyzed in boiling H2O gave I, m. 191-4°, isomerized by heating 8 hrs. at 170-80° with a small amount of dilute HCl in a sealed tube to yield 61.5% Ia, m. 228.5-30.5° (from EtOH). Carefully neutralized solutions of the Na salts of I and Ia treated with an exactly equivalent quantity of aqueous AgNO3 and filtered, the precipitate carefully washed with H2O, alc., and Et2O, dried several days over P2O5 in vacuo, and screened to 100 mesh gave Ag salts (III, IIIa) suitable for reaction with Br. Reaction of III and IIIa with Br was carried out at various temperatures by the inverse addition procedure of Conly (C.A. 48, 2561b) in which the dry III or IIIa was added to Br in CCl4, in an apparatus in which the speed and extent of the reaction were followed by observation of the CO2 evolved. The products of the reaction were tabulated (Ag salt, temperature of reaction, % yield, m.p. IIa, n25D, and structure as shown by infrared spectrum given): III, 0-25°, 43, -4.8°, 1.5503, all trans; III, reflux, 47, -4.7°, 1.5505, all trans; IIIa, 0-25°, 48, -4.5°, 1.5507, all trans; IIIa, reflux, 37, -2.5°, 1.5510, all trans. To establish the stability to isomerization under the above exptl. conditions, known cis-1,2-dibromocyclohexane (II) and IIa were refluxed 12 hrs. with Br and AgBr. II, m. 10.0°, n25D 1.5512, was recovered with a 60% yield of material, m. 6.5°, n25D 1.5511, all cis; and IIa, m. -4.5°, n25D 1.5505, similarly yielded 94% material, m. -4.5°, n25D 1.5505, all trans. Although the data did not distinguish partial isomerization from complete retention of configuration a very large proportion of II survived the reaction. No isomerization of II took place on 12 hrs. refluxing with Br and AgBr in anhydrous CCl4. The mechanistic implications were discussed briefly.

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Benzisoxazole – Wikipedia,
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Application of 610-09-3. 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 Generic Ion Chromatography-Conductivity Detection Method for Analysis of Palladium Scavengers in New Drug Substances. Author is Zou, Lanfang; Bennett, Raffeal; Haidar Ahmad, Imad A.; Jocher, Brandon M.; Zhang, Li; Bu, Xiaodong; Mangion, Ian; Regalado, Erik L..

The revolution of palladium-catalyzed reactions in the synthesis of new mols. has created an unprecedented need for highly efficient palladium (Pd) removal processes. Metal scavengers with very selective and efficient removal properties are being extensively applied across process research and development (PR&D) to meet very tight specifications for residual Pd levels. Anal. procedures for the determination of residual Pd are well-established; however, developing methodologies to detect a variety of Pd scavengers in multicomponent reaction mixtures is currently considered an emerging challenge in pharmaceutical anal. Herein a simple and efficient generic ion chromatog.-conductivity detection (IC-CD) method on a Dionex IonPac AS19 column in conjunction with a fully aqueous eluent profile (potassium-hydroxide-based) capable of chromatog. resolving over 10 Pd scavenger species commonly used in PR&D workflows is described. Computer-assisted separation modeling using an ACD Labs/LC simulator served to generate 3D resolution maps with excellent separation conditions that matched the outcome of subsequent exptl. data. Method validation experiments showed excellent anal. performance in linearity, recovery, repeatability, and LOQ/LOD. In addition, these same chromatog. conditions can sep. multiple anionic species and active pharmaceutical (API) counterions along with Pd scavengers in the same exptl. run. We also provide strategic examples where API counterion interferences (e.g., sulfate) can be minimized by treating the API sulfate form with barium acetate to enhance the recovery of the Pd scavenger analyte.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Safety of cis-Cyclohexane-1,2-dicarboxylic acid. 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 The structural diversity and luminescent properties of Zn(II) coordination assemblies with cyclohexane (or cyclohexene) dicarboxylate anions and two positional isomeric ligands. Author is Huang, Fu-Ping; Lei, Jing-Bin; Yu, Qing; Bian, He-Dong; Yan, Shi-Ping.

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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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Hydrogenation of aromatic compounds with the aid of platinum. III. Hydrogenation with platinum containing oxygen》. Authors are Willstatter, Richard; Jaquet, Daniel.The article about the compound:cis-Cyclohexane-1,2-dicarboxylic acidcas:610-09-3,SMILESS:O=C([C@H]1[C@@H](C(O)=O)CCCC1)O).Product Details of 610-09-3. Through the article, more information about this compound (cas:610-09-3) is conveyed.

cf. C. A. 7, 1508. Certain reductions, like that of phthalic anhydride (a), which cannot be effected catalytically with Pt free from O, can be initiated by loading the Pt with O and brought to completion by again treating the Pt with O as the catalyst gradually loses its O by the formation of H2O. Oxygen-free Pt and that containing O behave like 2 different contact substances in reduction processes. Thus, 20.3 g. (a) in 75 cc. glacial AcOH with 5 g. Pt absorbed only 400 cc. H; if, however, the H gasometer was shut off and the reaction bulb evacuated, then allowed to fill with air, shaken 1 min. (whereupon O was rapidly absorbed -about 5 cc. per g. Pt) and the air was driven out with H, about 500 cc. of H was again absorbed after each such activation until the 20th and 21st times, when the absorption of H was 1230 and 5600 cc., rasp. The total absorption was 17040 cc. (20°, 760 mm.) or, deducting about 1150 cc. used up by the O introduced in the activations, 15890 cc. or 4.8 mols. Of the 2 rings in (a) the 5-membered one is reduced before the C6H6 ring; the first product is phthalide (b) which is partially reduced to hexahydrophthalide (c) and partially to o-MeC6H4CO2H (d) which is then reduced to the hexahydrotoluic acid (e). If the process is interrupted when only a little H has been absorbed there is obtained, besides some C6H6(CO2H)2, a mixture of (b) and (c), and while (b) is easily reduced further to (d), (c) cannot be reduced to (e). If in the process of isolation alkali is employed the (c) is in part obtained as methylolhexahydrobenzoic acid. Among the reduction products is also cis-hexahydrophthalic acid (f). In the reduction described above were obtained 7 g. (c) (partially hydrolyzed), 7 g. (e) and 4 g. (f). In a similar reduction of (b) 3.4 mols. H were absorbed and there were obtained about equal parts of (e) and (c). Phthalimide behaves quite differently from (a) on reduction, the aromatic nucleus and not the CO groups taking up the O. The activation of the Pt with O is not necessary but the reduction is successful only with the best Pt sponge preparations; many which were active towards C6H6 were inactive towards the imide. Nor can MeOH, EtOH or cyclohexane be used as a solvent; in glacial AcOH the reduction proceeds smoothly. cis-Hexahydrophthalimide seps. from H2O, alc. and AcOH in monoclinic prisms, m. 132°. Naphthalic acid purified by crystallization from alc. cannot be reduced because it always contains some anhydride (g) but the acid freshly precipitated from alk. solution can be reduced; contrary to C10H8, it takes up only 4 atoms of H; the tetrahydronaphthalic acid (h) seps. in cube-like prisms, m. 196° with loss of H2O and conversion into the anhydride, m. 119°. (g), like (a), can be reduced only with Pt activated with O; after about 4 mols. H2 have been absorbed the reaction slows up. As far as the (g) itself is reduced, the anhydride ring is attacked, but as some of the (g) is hydrolyzed by the H2O formed, some (h) is obtained. Among the reduction products are tetrahydro-1-methylnaphthalene-8-carboxylic acid (i), tetra- and decahydronaphthalides and a small amount of decahydroacenaphthene. The 2 naphthalides could not be isolated pure. The (i) seps. from Et2O-petr. ether in needles, m. 150°. o-C6H4(CO2H)2 is easily reduced in AcOH when entirely free from the anhydride, yielding exclusively the cis-hexahydro acid, m. 191-2°. The p-acid in AcOH suspension is reduced much more rapidly on gentle warming, giving about equal parts of the cis- and cis-trans-hexahydro acids, m. 162-3° and about 300°, resp. The m-acid, if pure, is likewise easily reduced in AcOH suspension, forming chiefly the cis- and some cis-trans-hexahydro acid. p-Toluylic acid very quickly gives exclusively or almost exclusively the liquid hexahydro acid whose amide m. 175-6°. Indole in AcOH smoothly absorbs 8 atoms H with formation of perhydroindole, b720 182-3°, b12 65°, a basic oil of medium consistency and unpleasant, penetrating, onion-like odor, d420 0.9947; chloroplatinate, reddish yellow monoclinic tablets from alc., m. 172-3° (not sharply); picrate, fine needles from alc., m. 137-8° (not sharply). If the reduction is interrupted before it is complete (e. g., when 2 atoms of H have been absorbed), the product contains unchanged indole, dihydroindole and perhydroindole, the last being removed by shaking the Et2O solution with 0.1 N HCl until the alk. reaction just disappears, and the first two being separated by fractional precipitation from Et2O with picric acid.

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Benzisoxazole – Wikipedia,
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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.Morawetz, Herbert; Choi, Ling Siu researched the compound: cis-Cyclohexane-1,2-dicarboxylic acid( cas:610-09-3 ).Quality Control of cis-Cyclohexane-1,2-dicarboxylic acid.They published the article 《Ionization equilibria in dicarboxylic acids undergoing conformational transitions》 about this compound( cas:610-09-3 ) in Journal of Physical Chemistry. Keywords: ionization dicarboxylic acid conformation; succinic acid ionization conformation. We’ll tell you more about this compound (cas:610-09-3).

Succinic acid and substituted succinic acids undergo conformational transitions during ionization, and these are expected to affect their ionization equilibrium The 1H NMR data on the dependence of the conformational equilibrium of succinic acid and meso-2,3-dimethylsuccinic acid on their degree of ionization are interpreted in terms of the ratio of the 2nd ionization constants of the gauche and trans isomer, K2g/K2t, and the equilibrium constant Kc for the gauche-trans transition of the unionized acid. The K2g/K2t ratios obtained for the 2 above acids are compared with theratio of the 2nd ionization constants of cis- and trans-cyclohexane-1,2-dicarboxylic acids used as model compounds in which the carboxyls are gauche and trans to each other.

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Benzisoxazole – Wikipedia,
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