Tag: M.W:100-200

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.COA of Formula: C9H16O2.Koshimura, Hideo; Okubo, Teiji published the article 《Extraction of nickel in the presence of ammonia with β-diketones containing phenyl and alkyl groups》 about this compound( cas:18362-64-6 ) in Polyhedron. Keywords: nickel extraction diketone ammoniacal soluble; alkyl group diketone extraction nickel; phenyl group diketone extraction nickel; substituent effect diketone extraction nickel; ammonia effect diketone extraction nickel. Let’s learn more about this compound (cas:18362-64-6).

The extraction of Ni chelates with β-diketones containing either alkyl or Ph groups was examined in the absence and in the presence of NH3 in the aqueous solution, in order to define the effect of substituents and the coordinating effect of NH3 on the extraction In the extraction of Ni chelates in the presence of NH3 the extracted species NH3 are [NiA2(NH3)2] (A: β-diketone anion) and NH3 acts both as adduct-forming in the organic phase and as masking reagent in the aqueous phase.

Compound(18362-64-6)COA of Formula: C9H16O2 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(2,6-Dimethyl-3,5-heptanedione), if you are interested, you can check out my other related articles.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

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: 18362-64-6, is researched, Molecular C9H16O2, about The formation constants of ionomycin with divalent cations in 80% methanol/water, the main research direction is formation constant ionomycin divalent metal.SDS of cas: 18362-64-6.

The protonation constants and complex formation constants of ionomycin have been determined in 80% MeOH-H2O (by weight) at 25.0° and μ = 0.050 (tetraethylammonium perchlorate). Potentiometric and spectrometric titration techniques give the following values for the mixed-mode protonation constants of ionomycin: log KH1 = 11.94 and log KH2 = 6.80. Comparison of these values with those for model compounds indicates that KH1 and KH2 refer to equilibrium involving the β-diketone and carboxylic acid moieties, resp. Titrations of ionomycin with metal ion at fixed values of pH* produced changes in the UV-visual absorbance spectra which were analyzed to give conditional complex formation constants, KMI’. The pH* dependence of the values of KMI’ indicated that 1:1 divalent metal ion-ionomycin (MI) complexes and protonated MHI+ complexes were formed in the pH* range studied. The values of log KMI ranged from 5.30 for Sr2+ to 10.25 for Ni2+. The selectivity pattern and relative affinities (in parentheses) for the formation of the species MI are as follows: Ni2+ (2000) > Zn2+ (600) > Co2+ (440) > Mn2+ (47) > Mg2+ (1.00) > Ca2+ (0.21) > Sr2+ (0.022). Logarithmic values of KMHI, for the reaction MI + H+ ⇌ MHI+, ranged from 5.9 (Ni2+) to 8.4 (Sr2+). Calculations using the values of the equilibrium constants determined indicate that an appreciable fraction of the complexed ionophore exists as the protonated complex, MHI+, in the pH* range of 6.5-8.5.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

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.Kreutzberger, Alfred; Leyke-Roehling, Swanhild researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Recommanded Product: 2,6-Dimethyl-3,5-heptanedione.They published the article 《Antiviral agents. XX: 4,6-Dialkylated 2-benzylthiopyrimidines》 about this compound( cas:18362-64-6 ) in Archiv der Pharmazie (Weinheim, Germany). Keywords: dialkylbenzylthiopyrimidine; fluoromethylpyrimidine virustat preparation; benzylthiopyrimidine dialkyl; pyrimidine dialkylbenzylthio; isourea cyclization diketone. We’ll tell you more about this compound (cas:18362-64-6).

Cyclizing PhCH2SC(:NH)NH2 with HOCR:CHCOR1 (R = R1 = Me, Et, CHMe2) in pyridine or DMF in the presence of K2CO3 gave pyrimidines I. PhCH2SC(:NH)NH2 and HOCEt:CHCOEt in aqueous K2CO3-EtOH-Et2O underwent ethanolysis to give ethoxypyrimidine II. I (R = Et, R1 = CF3) inhibited influenza A in mice at 5 × 1.66 mg/20 g s.c.

Compound(18362-64-6)Recommanded Product: 2,6-Dimethyl-3,5-heptanedione received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(2,6-Dimethyl-3,5-heptanedione), if you are interested, you can check out my other related articles.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Recommanded Product: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine. 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: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine, is researched, Molecular C10H24N2, CAS is 111-18-2, about Electrochemical performance and enhanced nitrate removal of homogeneous polysulfone-based anion exchange membrane applied in membrane capacitive deionization cell.

This paper aims to investigate different strategies toward the enhancement of nitrate removal in a membrane capacitive deionization cell using different membrane functionalizing agents such as trimethylamine, triethylamine, and N,N,N’,N’-tetramethyl-1,6-hexanediamine as well as a double-layer, novel homogeneous polysulfone-based anion exchange membrane. The prepared membranes exhibited nitrate vs. chloride transport number ratio in the range of 0.96-1.52. The salt adsorption capacity for the NaNO3 feed was about 1.4-fold compared to that of using NaCl in case of triethylamine functionalized membrane under individual feeding solutions of 30 mL NaCl or NaNO3 during 30 min, and adsorption/desorption voltages of 1.6/0.0 V process conditions. At the same time, this parameter was about 1.2-fold weaker for the cell with a double-layer membrane. Based on the experiments, it can be inferred that the affinity toward nitrate could be promoted as the chain length of the alkyl group increases (i.e., increasing hydrophobicity of the groups). However, due to decrement in water uptake, the overall electrochem. performance of the membranes tended to weaken as the affinity toward nitrate increased. Results showed that the prepared membranes are suitable substitutions to conventional polystyrene-based ones utilized in membrane capacitive deionization cells.

Compound(111-18-2)Recommanded Product: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(N1,N1,N6,N6-Tetramethylhexane-1,6-diamine), if you are interested, you can check out my other related articles.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

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: 111-18-2, is researched, SMILESS is CN(C)CCCCCCN(C)C, Molecular C10H24N2Journal, Journal of Materials Science called Direct synthesis of hierarchical zeolites through mesoporous 3D wormhole framework using single-head quaternary ammonium salt as structure-directing agent, Author is Fu, Tianyi; Ding, He; Zhang, Jingshuang; Bai, Peng; Lyu, Jiafei; Guo, Xianghai, the main research direction is zeolite three dimensional wormhole framework synthesis quaternary ammonium salt; structure directing agent quaternary ammonium salt zeolite synthesis.SDS of cas: 111-18-2.

Hierarchical aluminosilicate zeolites with uniform mesoporosity were successfully synthesized by one-stage crystallization under constant temperature with a novel single-head quaternary ammonium salt ([C18H37-N+(CH3)2-C6H12-N(CH3)2]Br-) as mesoporogen and structure-directing agent (SDA). Through precisely controlling the molar ratio of Si/Al and synthetic time, the mesoporous 3D wormhole framework (MCM-48) and crystalline microporous MFI structure were simultaneously constructed, revealed by a series of in-depth characteristic studies. Combining the advantages of the significantly improved diffusion from the mesoporous MCM-48 and the strong framework acidity of the crystalline microporous MFI zeolite, the hierarchical aluminosilicate zeolites exhibited outstanding catalytic activity with good reusability towards bulky aldol condensation compared with the conventional meso- or microporous zeolites.

Compound(111-18-2)SDS of cas: 111-18-2 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(N1,N1,N6,N6-Tetramethylhexane-1,6-diamine), if you are interested, you can check out my other related articles.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Tai, Akira; Kikukawa, Tadashi; Sugimura, Takashi; Inoue, Yosihisa; Osawa, Tsutomu; Fujii, Satoshi published the article 《Highly efficient enantio-differentiating hydrogenation over an ultrasonicated Raney nickel catalyst modified with tartaric acid》. Keywords: ultrasound Raney nickel enantioselectivity; stereochem ultrasound Raney nickel; hydrogenation diketone oxoalkanoate ultrasound Raney nickel; hydroxycarboxylic acid asym synthesis; diol asym synthesis.They researched the compound: 2,6-Dimethyl-3,5-heptanedione( cas:18362-64-6 ).Quality Control of 2,6-Dimethyl-3,5-heptanedione. 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.

A tartaric acid-NaBr-modified ultrasonicated Raney nickel catalyst showed enantioselective activity in the hydrogenation of 1,3-diketones and Me 3-oxoalkanonates. Hydrogenation of MeCOCH2COMe with ultrasonicated, modified Raney nickel gave (R)-MeCH(OH)CH2COMe, meso-MeCH(OH)CH2C(OH)Me, and erythro-MeCH(OH)CH2C(OH)Me in a 7:7:86 ratio; the yield of erythro-MeCH(OH)CH2CH(OH)Me (32% enantiomeric excess) was 60%. Reduction of MeCOCH2CO2Me gave (R)-MeCH(OH)CH2CO2Me in 86% enantiomeric excess.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Safety of 2-Chloro-5-methylpyridine-3,4-diamine. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 2-Chloro-5-methylpyridine-3,4-diamine, is researched, Molecular C6H8ClN3, CAS is 18232-91-2, about Pyridotriazoles and pyridoimidazoles. II. 4,5-Diamino-3-picoline and 3,4-diamino-2,6-lutidine derivatives. Author is Brekiesz-Lewandowska, Barbara; Talik, Zofia.

A mixture of 3-methyl-4-aminopyridine in 120 ml. concentrated H2SO4 (d. 1.84) was treated portionwise, at 0°, with 48 ml. HNO3 (d. 1.52) and the mixture kept 1 hr. at room temperature, poured into 300 g. crushed ice, and neutralized with concentrated ammonia to pH 7 to give 32 g. 3-methyl-4-nitraminopyridine (I), m. 212° (H2O). When heated 5 hrs. at 50° and worked up as above, 30 g. I afforded 17.5 g. 3-methyl-4-amino-5-nitropyridine (II), m. 193° (H2O). Reduction of 3 g. II in 100 ml. AcOH with 6 g. powd. Fe, 45 min. at reflux temperature, followed by treatment with a few drops of aqueous HgCl2 and 3 g. Zn dust, neutralization with concentrated KOH, and extraction with Et2O gave 2 g. 3-methyl-4,5-diaminopyridine (III), m. 149° (C6H6-alc.); picrate m. 198°. A solution of 3 g. III in 25 ml. H2O and 1 ml. concentrated H2SO4 was diazotized at 0° with 2.8 g. NaNO2 in 20 ml. H2O and the mixture kept 1 hr. at room temperature, concentrated to the half its original volume, and neutralized with KHCO3 to give 2.4 g. 3-methyl-4,5-pyridotriazole (IV, X = H), m. 260° (H2O). When refluxed 6 hrs., concentrated in vacuo, diluted with 10 ml. H2O, neutralized with KHCO3 to pH 7, then evaporated to dryness, and extracted with absolute alc., a solution of 2 g. III and 4 ml. 100% freshly distilled HCO2H afforded 0.8 g. 3-methyl-4,5-pyridoimidazole (V, X = H), m. 255°. Similarly prepared were the following (compound, m.p., and % yield given): 2,4-dimethyl-4-nitraminopyridine, 206° (decomposition), 93.5; 2,6-dimethyl-3-nitro-4-aminopyridine, 126°, 47.5-78.8; 2,6-dimethyl-3,4-pyridotriazole (VI), 267°, 70; 2,6-dimethyl-3,4-pyridoimidazole (VII), 208°, 56; 3-methyl-6-chloro-4,5-pyridotriazole (IV, X = Cl) (VIII), above 320°, 72. Reduction of 3 g. II with 48 g. SnCl2 in 15 ml. concentrated HCl gave 4 g. 3-methyl-4,5-diamino-6-chloropyridine (IX), m. 157° (H2O). A solution of 1.5 g. IX and 3 ml. hydrazine hydrate in 25 ml. absolute alc. refluxed 3 hrs. afforded 1 g. 3-methyl-6-hydrazino-4,5-pyridotriazole (IV, X = NHNH2), m. 265° (H2O). IX (2 g.) in 4 ml. 100% HCO2H refluxed 6 hrs. and worked up as above gave 1.4 g. 3-methyl-6-hydroxy-4,5-pyridoimidazole (V, X = OH) (X), m. >320°. Heating 2 g. X in 10 ml. POCl3 3 hrs. on a steam bath afforded 1.4 g. 3-methyl-6-chloro-4,5-pyridoimidazole (V, X = Cl) (XI), m. 256° (H2O). When refluxed with hydrazine hydrate 2 g. XI yielded 63% 3-methyl-6-hydrazino-4,5-pyridoimidazole (V, X = NHNH2), m. 220°. Reduction of 2 g. 2,6-dimethyl-3-nitro-4-aminopyridine in 50 ml. hot AcOH with 4 g. Sn led to 1.1 g. 2,6-dimethyl-3,4-diaminopyridine, m. 181° (C6H6); picrate m. 215°.

Compound(18232-91-2)Safety of 2-Chloro-5-methylpyridine-3,4-diamine received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(2-Chloro-5-methylpyridine-3,4-diamine), if you are interested, you can check out my other related articles.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

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, English Abstract, Article, Archiv der Pharmazie (Weinheim, Germany) called Antiviral agents. XX: 4,6-Dialkylated 2-benzylthiopyrimidines, Author is Kreutzberger, Alfred; Leyke-Roehling, Swanhild, which mentions a compound: 18362-64-6, SMILESS is CC(C)C(CC(C(C)C)=O)=O, Molecular C9H16O2, Safety of 2,6-Dimethyl-3,5-heptanedione.

Cyclizing PhCH2SC(:NH)NH2 with HOCR:CHCOR1 (R = R1 = Me, Et, CHMe2) in pyridine or DMF in the presence of K2CO3 gave pyrimidines I. PhCH2SC(:NH)NH2 and HOCEt:CHCOEt in aqueous K2CO3-EtOH-Et2O underwent ethanolysis to give ethoxypyrimidine II. I (R = Et, R1 = CF3) inhibited influenza A in mice at 5 × 1.66 mg/20 g s.c.

Compound(18362-64-6)Safety of 2,6-Dimethyl-3,5-heptanedione received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(2,6-Dimethyl-3,5-heptanedione), if you are interested, you can check out my other related articles.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Zhang, Xiaomin; Xiong, Wenjie; Shi, Mingzhen; Wu, Youting; Hu, Xingbang published an article about the compound: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine( cas:111-18-2,SMILESS:CN(C)CCCCCCN(C)C ).Recommanded Product: N1,N1,N6,N6-Tetramethylhexane-1,6-diamine. 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:111-18-2) through the article.

The capture and conversion of H2S is of importance towards long-standing economic and environmental challenge. Hence, a series of task-specific ionic liquids were developed and presented as both absorbents and catalysts for simultaneous capture and conversion of H2S into high valuable mercaptan acids using unsaturated acids as starting materials. Good to quant. conversion was realized with catalytic loading of ILs. Water extraction was employed to sep. the product from the reaction system. The kinetic isotherm demonstrated that the addition reaction can achieve 98% conversion at 90°C and 50 mol% of catalyst loading within 1 h. A plausible reaction-separation-integration strategy was further proposed. This work discloses a green, simple, and mild but effective method for the capture and catalytic conversion of H2S into high valuable mercaptan acids.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

SDS of cas: 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 Effect of substituents on the distribution coefficients of alkyl-substituted β-diketones and their copper and iron chelates. Author is Koshimura, Hideo; Okubo, Teiji.

A series of alkyl-substituted β-diketones consisting of acetylacetone, dipropionylmethane, diisobutyrylmethane, dipivaloylmethane, dibutyrylmethane, divalerylmethane, dicaproylmethane and diisovalerylmethane was studied to establish the effect of substituents on the extraction constants and the acid dissociation constants The logarithm of the distribution coefficients of the β-diketones and of their Cu(II) and Fe(III) chelates was a linear function of the number of C atoms in the mol. The distribution coefficient increased by a factor of 4 for each addnl. C atom.

Compound(18362-64-6)SDS of cas: 18362-64-6 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(2,6-Dimethyl-3,5-heptanedione), if you are interested, you can check out my other related articles.

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Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica