Category: 18362-64-6

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ) is researched.Recommanded Product: 18362-64-6.Koshimura, Hidio; Okubo, Teiji published the article 《Solvent extraction of metals by alkyl-substituted β-diketone》 about this compound( cas:18362-64-6 ) in Analytica Chimica Acta. Keywords: solvent extraction metal; extraction metal solvent; diketone solvent extraction metal; palladium solvent extraction; iron solvent extraction; aluminum solvent extraction; copper solvent extraction; zinc solvent extraction; nickel solvent extraction; cobalt solvent extraction; manganese solvent extraction; cadmium solvent extraction. Let’s learn more about this compound (cas:18362-64-6).

The extractions of Pd2+, Fe3+, Al3+, Cu2+, Zn2+, Ni2+ Co2+, Mn2+, and cd2+ by solutions of dipropionylmethane, diisobutyrylmethane, pivaloylacety lmethane, and dipivaloylmethane in benzene were studied in relation to the pH values for extraction The extraction constants and 2-phase stability constants of the β-diketonates were calculated These can be used to establish the optimum conditions for the separation of the metals.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《A disregarded complication in the synthesis of β-keto esters by the base-catalyzed acidolysis of diethyl acylmalonates》. Authors are Brandstrom, Arne.The article about the compound:2,6-Dimethyl-3,5-heptanedionecas:18362-64-6,SMILESS:CC(C)C(CC(C(C)C)=O)=O).Safety of 2,6-Dimethyl-3,5-heptanedione. Through the article, more information about this compound (cas:18362-64-6) is conveyed.

cf. preceding abstract The main impurities in the preparation of β-keto esters from di-Et malonates according to the reaction RCOCH-(CO2Et)2 + RCO2H → RCOCH2CO2Et + RCO2Et + CO2 were studied. EtCOCH2CO2Et (I) was synthesized (preceding abstract). Fractionation gave 47 g. forerun, b7.5 40-68°, which with Cu(OAc)2 solution yielded the Cu derivative, m. 212°, of (EtCO)2CH2 (II), corresponding to 31 g. II, b9 59°. The 2 following fractions, b7.5 68-9° and 72-3°. were considered to be the enol and keto forms of I. The residue consisted chiefly of CH2(CO2Et)2, b7.5 79-81° (10% of the initial products). The products from the reaction of Me2CHCO2H with Me2CHCOCH(CO2Et2 showed a 1% yield of (Me2CHCO)2CH2, isolated as its Cu salt, m. 129°. The products from the reaction of PrCO2H and PrCOCH(CO2Et)2 could not be separated by distillation, and 10 g. of the distilled product was refluxed 3 hrs. with 100 cc. 20% H2SO4and the product steam-distilled to give 11% (PrCO)2CH2 (precipitated as the Cu derivative, m 157°). Equimol. amounts of AcCH(CO2Et)2 and AcCH2CO2Et (III) were refluxed 3 hrs. with a little MgO and Cu(OAc)2, and the mixture fractionated; fraction 1, b7.5 30-60°, gave 1.5 g. AcCH2COMe; fraction 2, b7.5 60- 75°, contained 6 g. III; fraction 3, b7.5 75-83°, gave 22 g. CH2(CO2Et)2 (S-benzylisothiuronium salt, m. 147°); and fraction 4, 10 g., b7.5 83-100°, gave Ac2CHCO2Et.

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Computed Properties of C9H16O2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about An improved asymmetrically modified nickel catalyst prepared from ultrasonicated Raney nickel. Author is Tai, Akira; Kikukawa, Tadashi; Sugimura, Takashi; Inoue, Yoshihisa; Abe, Satoshi; Osawa, Tsutomu; Harada, Tadao.

The ultrasonic irradiation of Raney nickel catalyst in water followed by the removal of the resulting turbid supernatant gave an excellent nickel catalyst (RNi-U) which generated an asym.-modified nickel catalyst. An EPMA (SEM-EDX) study indicated that RNi-U consisted of a fairly pure nickel surface of homogeneous size. Tartaric acid-NaBr-modified RNi-U (TA-NaBr-MRNi-U) showed a high enantio-differentiating ability as well as reactivity in the hydrogenation of prochiral ketones such as 1,3-diones and 3-oxoalkanoic acid esters.

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Application of 18362-64-6. 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: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about CO2 sensing property of CuO-BaTiO3 mixed oxide film prepared by self-assembled multibilayer film as a precursor. Author is Ishihara, Tatsumi; Takagi, Toshiaki; Ito, Masami; Nishiguchi, Hiroyasu; Takita, Yusaku.

Preparation of CuO-BaTiO3 mixed oxide thin film by the decomposition of a self-assembled multibilayer film as a mol. template was studied. Also, CO2 sensing property of the resultant thin film was studied as a capacitive type sensor. The self-assembled bilayer film of few 1000 layers thickness can be obtained easily by casting an aqueous suspension consisting of dimethyldihexadecylammonium bromide (DC1-16), Cu(ClO4)2, Ba(TiO(C2O4)2), 2,6-dimethyl-3,5-heptadione (DHP), and polyvinyl alc. Divalent copper ion (Cu2+) which is associated with 2 DHP mols. was incorporated into the mol. bilayer film and BaTiO3 precursor exists at the interspace of mol. bilayer film by coordinating with polyvinyl alc. Upquenching the organic-inorganic film at 1173 K leads to the uniform film of CuO-BaTiO3 oxide mixture Although operating temperature shifted to higher temperature, the resultant film exhibits the capacitance change upon exposure to CO2. Consequently, the mixed oxide film of CuO-BaTiO3 prepared by the decomposition of multibilayer film was also an appropriate capacitive type CO2 sensor.

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Siddall, Thomas H. III; Stewart, William Esley published the article 《Structure of some uranium(IV) chelates in solution》. Keywords: uranium chelates structure; acetylacetinato uraniums.They researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Related Products of 18362-64-6. 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:18362-64-6) here.

N.M.R. spectral data of UL4 [HL = RC(O)CH2C(O)R, where R = Me, Et, iso-Pr, tert-Bu] and UL4-xL1x [x = 1-3, R in HL = tert-Bu, and HL1 = HL (R = Et)] indicate a less sym. structure for the compounds than a D2 sq. antiprism or a D2d triangular dodecahedron.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Chemistry of vitamin E. XL. Synthesis and properties of 2-isopropyl-4,6,7-trimethyl-5-hydroxycoumaran》. Authors are Smith, Lee Irvin; King, John A..The article about the compound:2,6-Dimethyl-3,5-heptanedionecas:18362-64-6,SMILESS:CC(C)C(CC(C(C)C)=O)=O).Synthetic Route of C9H16O2. Through the article, more information about this compound (cas:18362-64-6) is conveyed.

cf. C. A. 36, 4120.3. (Me2CHCO)2CH2 (I), orange-red oil, b3 62-3°, results in 28% yield from the Na derivative of iso-PrCO2Et and iso-PrAc. I (16.85 g.), slowly added (15 min.) to 7.34 g. EtONa in 50 cc. dry EtOH at a temperature below 25°, followed by 16 g. trimethylquinone in 50 cc. dry EtOH during 1 hr., with stirring for 45 min., and acidification at 0°, gives 76% of 2,6-dimethyl-4-(2,5-dihydroxy-3,4,6-trimethylphenyl)-3,5-heptanedione (II), m. 135-5.5°. Solution of II in Ac2O and a drop of concentrated H2SO4 and immediate addition to ice give 3-methyl-1-(2-isobutyroxy-5-acetoxy-3,4,6-trimethylphenyl)-2-butanone, m. 113°. II (11.4 g.), refluxed 3 hrs. with 250 cc. HCl and 10 cc. EtOH, diluted with 500 cc. H2O and distilled with steam, gives 4.9 g. of unchanged II (not volatile with steam) and 4 g. of 2-isopropyl-4,6,7-trimethyl-5-hydroxycoumarone (III), m. 118°; this also results from the diester and HCl; 5-Ac derivative, m. 69-70°. Catalytic reduction (Raney Ni) of 2.5 g. of III (1 hr. at 125° and 1300 lb. pressure) gives 2.4 g. of 2-isopropyl-4,6,7-trimethyl-5-hydroxycoumaran (IV), m. 112°; Ac derivative, m. 72-3°. Oxidation of IV with AuCl3 or FeCl, in aqueous EtOH gives 2,3,5-trimethyl-6-(2-hydroxy-3-methylbutyl)-1,4-benzoquinone (V), a yellow or orange oil which could not be crystallized Reduction of V with Na hydrosulfite or with Zn and AcOH gives IV; the intermediate hydroquinone could not be isolated and none of the isomeric chroman is obtained. These results show that the cyclodehydration of a hydroquinone ortho substituted by a side chain containing a secondary alkyl group and a H group in the β-position involves direct elimination of H2O between the 2 HO groups and does not involve a preliminary dehydration of the side chain. Moreover, cyclization of this substituted hydroquinone occurs with such great ease that the hydroquinone cannot be isolated when the quinone is reduced.

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Computed Properties of C9H16O2. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about Convenient Synthesis of Benzothiazoles and Benzimidazoles through Bronsted Acid Catalyzed Cyclization of 2-Amino Thiophenols/Anilines with β-Diketones. Author is Mayo, Muhammad Shareef; Yu, Xiaoqiang; Zhou, Xiaoyu; Feng, Xiujuan; Yamamoto, Yoshinori; Bao, Ming.

In the presence of p-toluenesulfonic acid, diketones RCOCH2COR1 (R = R1 = Me, Et, i-Pr, Ph; R = Me; R1 = Ph) underwent cyclocondensation reactions with 2-aminobenzenethiols 4-R2-2-H2NC6H3SH (R2 = H, Cl) or 1,2-benzenediamines 4-R2-1,2-C6H3(NH2)2 (R2 = H, Cl, Me, MeO, O2N) to give benzothiazoles and benzimidazoles I (R = R1 = Me, Et, i-Pr, Ph; R2 = H, Cl, Me, MeO, O2N; X = S, NH) under either solvent-free conditions at ambient temperature or in acetonitrile at 80° without an oxidant, metal catalyst, or microwave irradiation in 51-95% yields.

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Recommanded Product: 18362-64-6. 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: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about 1H NMR spectra of some β-dicarbonyl complexes of trimethylplatinum(IV).

Variable-temperature NMR spectra of a number of dimeric β-dicarbonyl complexes of trimethylplatinum(IV), where β-dicarbonyl = malondialdehyde, aceto acetaldehyde, acetylacetone, and diisobutyrylmethane, have been recorded in CDCl3. Results indicate that above room temperature, rapid dissociation of the bond between Pt and the γ-C atom of the β-dicarbonyl ligand occurs.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 2,6-Dimethyl-3,5-heptanedione, is researched, Molecular C9H16O2, CAS is 18362-64-6, about Experimental determination of the molar enthalpies of vaporization for some β-diketones, the main research direction is heat evaporation diketone estimation; methyl heptanedione heat evaporation; fluoro pentanedione heat evaporation.SDS of cas: 18362-64-6.

The measured heats of evaporation at 298.15 K are, in kcal/mol; 2,6-diMe-3,5-heptanedione (13.40); 2,2-diMe-3,5-heptanedione (13.59); 2,2,6-triMe-3,5-heptanedione (13.80); 2,2,6,6-tetraMe-3,5-heptanedione (14.23); 1,1,1-trifluoro-2,4-pentanedione (8.90) and 1,1,1,5,5,5-hexafluoro-2,4-pentanedione (7.31). Attempt was made to determined mol. structure group contribution factors for the heals of evaporation of this group of compounds

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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: 18362-64-6, is researched, SMILESS is CC(C)C(CC(C(C)C)=O)=O, Molecular C9H16O2Journal, Journal of Materials Chemistry C: Materials for Optical and Electronic Devices called Solution-processable iridium phosphors for efficient red and white organic light-emitting diodes with low roll-off, Author is Deng, Ya-Li; Cui, Lin-Song; Liu, Yuan; Wang, Zhao-Kui; Jiang, Zuo-Quan; Liao, Liang-Sheng, the main research direction is iridium phosphor red white organic light emitting diode.SDS of cas: 18362-64-6.

A new red phosphorescent material Ir(dmppm)2(dmd), which is a pyrimidine-based Ir(III) complex, was synthesized and successfully used to fabricate solution-processed red and white organic light-emitting diodes (OLEDs). Due to its excellent solubility in common organic solvents and its good compatibility with the host material, a record current efficiency of 27.2 cd A-1 so far with satisfactory Commission International de l’Eclairage (CIE) coordinates of (0.60, 0.40) was achieved for partially solution-processed red OLEDs by using Ir(dmppm)2(dmd) as a dopant. Also, the fabricated 2-component warm-white OLEDs based on the Ir(dmppm)2(dmd) red emitter demonstrate a maximum current efficiency of 28.9 cd A-1, which can meet the call for physiol.-friendly indoor illumination.

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