Tag: M.W:100-200

Related Products of 4971-56-6, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 4971-56-6, Furan-2,4(3H,5H)-dione, introducing its new discovery.

The phytophagous mite is highly polyphagous and widespread in warmer regions and greenhouses around the world, and so the focus of novel acaricides is shifting towards more effective, ecofriendly new chemical entity with unique modes of action. In this study, eighteen spirobutyrolactones derived from natural tetronic acid have been synthesized and their acaricidal activities against Tetranychus cinnabarinus were investigated by slide-dip method. The results of preliminary bioassay indicate that some of these compounds exhibited promising acaricidal activities, especially, compounds 6 and 18 show significant activities against T. cinnabarinus than the commercial spirodiclofen 1 (27.37% mortality), and which present 58.55% and 82.24% mortality at tested dose, respectively. The relationship between structure and acaricidal activity was also discussed based on the experimental data, and which indicate that the compounds (16, 17 and 18) with non-substituted phenyl ring (R1 = H) show obviously better activities. Especially, we also can find that substituted benzoyl unit will help to increase the activity than substituted phenylacetyl group.

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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Recommanded Product: 77513-58-7, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 77513-58-7, Name is Ethyl 2-oxotetrahydrofuran-3-carboxylate, molecular formula is C7H10O4

Carbon nucleophiles are alkylated with ?-allylpalladium complexes formed by the palladium-catalyzed Heck reaction of a vinyl bromide and an olefin.This methodology achieves the consecutive formation of two carbon-carbon bonds in one simple operation and can be applied both inter- and intramolecularly.The rapid construction of functionalized carbobicyclic compounds is effected by the intramolecular version of this condensation.

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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Chemistry is traditionally divided into organic and inorganic chemistry. name: 4,4-Dimethyldihydrofuran-2,3-dione, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 13031-04-4

Ruthenium clay, prepared by reaction of RuCl3·H2O with the 3- phosphinopropyl ligand anchored on Fluka K10 montmorillonite, is an effective catalyst for the reduction of the alpha-carbonyl group of alpha-ketoesters and alpha- ketoamides (50-89% yield).

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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Related Products of 1679-47-6, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1679-47-6, Name is 3-Methyldihydrofuran-2(3H)-one, molecular formula is C5H8O2. In a Article，once mentioned of 1679-47-6

An efficient method for the coupling of N-alkylamines with silicon enolates to generate beta-amino carbonyl compounds is disclosed. These reactions proceed by activation of alpha-amino C-H bonds by B(C6F5)3, which likely generates a “frustrated” acid/base complex in the presence of large N-alkylamines. The transformation requires no external oxidant and releases hydrosilane as a byproduct. The utility of this method is demonstrated in the late-stage functionalization of bioactive molecules such as citalopram, atomoxetine, and fluoxetine.

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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Chemistry is traditionally divided into organic and inorganic chemistry. SDS of cas: 7175-81-7, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 7175-81-7

Enantiopure bis(mu-acetato)-bridged planar chiral cyclopalladated products [Pd{(eta5-C5H3-CR=NCH2CHCH 2CH2CH2O)Fe(eta5-C 5H5)}(mu-OAc)]2 (R = H, Me) have been obtained by asymmetric cyclopalladation of the corresponding chiral ferrocenylimines with palladium-(II) acetate and sodium acetate in methanol at room temperature with a high level of diastereoselectivity (product ratio syn-(+)-(Rp,R,R,Rp):syn-(-)-(Sp,R,R,S p) ? syn-(-)-(Sp,S,S,Sp): syn-(+)-(Rp,S,S,Rp) ? 9:1). One or both acetato groups can be readily substituted by other anionic ligands to yield novel mixed-bridge or bis(mu-anion)-bridged planar chiral dimers of ferrocene derivatives. The first cis-type syn-(Rp,Sp) cyclopalladated dimer of ferrocenylimine has been obtained. The diphenylacetylene insertion reaction of a variety of anion-bridged planar chiral dimeric cyclopalladated derivatives of ferrocene has also been investigated. The absolute configurations of bis(mu-acetato)-, bis(mu-halogeno)-, (mu-1kappaS:2kappaN)-(mu-1kappaN:2kappaS)-thiocyanato-, and (mu-1kappaO:2kappaN)-(mu-1kappaN:2kappaO)-nitrito-bridged planar chiral dimers and bis-(diphenylacetylene) insertion products have been elucidated by single-crystal X-ray analysis.

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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Electric Literature of 2144-40-3, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 2144-40-3, Name is (cis-Tetrahydrofuran-2,5-diyl)dimethanol, molecular formula is C6H12O3. In a Article，once mentioned of 2144-40-3

Mesoporous aluminium doped MCM-41 silica catalysts were prepared by a sol-gel method in two reaction steps (acid and alkaline hydrolysis) from joint hydrolysis of tetraethylortosilicate (TEOS) and aluminium triisoproxide, using n-dodecylammonium chloride as surfactant, at room temperature, and subsequent calcination at 550. C. Two solids with different Si/Al molar ratios (5 and 10) were synthesized, which possess high specific surface area and acidity, with both Broensted and Lewis acid sites. By using a biphasic water/MIBK as reaction medium and a 30. wt.% of the 10Al-MCM catalyst with respect to the substrate weight (glucose), 87% of glucose conversion and 36% of HMF yield were achieved at 195. C after 150. min of reaction time. The reaction is quite selective toward HMF, since only fructose was detected as by-product, but neither levulinic acid nor furfural were found. Moreover, the use of a sodium chloride aqueous solution (20. wt.%) and MIBK ameliorates the partition coefficient between the organic and the aqueous phases up to 1.9, leading to an enhancement of the glucose conversion and HMF yield, attaining values of 98% and 63%, respectively, in a time as short as 30. min. The catalytic performance of this acid solid, associated to the presence of strong acid sites, is well maintained after three catalytic cycles.

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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Electric Literature of 17347-61-4, Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. 17347-61-4, Name is 2,2-Dimethylsuccinicanhydride,introducing its new discovery.

The present invention relates to compounds of the following formula (I): or a pharmaceutically acceptable salt thereof, a stereoisomer or a mixture of stereoisomers in any proportion, in particular a mixture of enantiomers, and particularly a racemate mixture, in which R represents a (C1-C10)alkyl group substituted with one or more, preferably one or two, groups chosen from COOH and NHR1, with R1 representing a hydrogen atom or a -Alk, -C(O)-Alk or -C(O)O-Alk group, Alk representing a (C1-C6)alkyl group, as well as a method for preparing them, and their use as a medicine, notably for treating an infection with a retrovirus such as HIV.

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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Safety of Gamma-heptalactone, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 105-21-5, Name is Gamma-heptalactone, molecular formula is C7H12O2

Food cooking can be a significant source of atmospheric participate organic matter. In this study, the chemical composition of particulate organic matter (POM) in PM2.5 emitted from four different Chinese cooking styles were examined by gas chromotography-mass spectrometry (GC-MS). The identified species are consistent in the emissions from different Chinese cooking styles and the quantified compounds account for 5?10% of total POM in PM 2.5. The dominant homologue is fatty acids, constituting 73?85% of the quantified compounds. The pattern of n-alkanes and the presence of beta-sitosterol and levoglucosan indicate that vegetables are consumed during Chinese cooking operations. Furthermore, the emissions of different compounds are impacted significantly by the cooking ingredients. The candidates of organic tracers used to describe and distinguish emissions from Chinese cooking in Guangzhou are tetradecanoic acid, hexadecanoic acid, octadecanoic acid, oleic acid, levoglucosan, mannosan, galactosan, nonanal, and lactones. During the sampling period, the relative contribution of Chinese cooking to the mass concentration of atmospheric hexadecanoic acid should be less than 1.3% in Guangzhou.

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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Related Products of 637-64-9, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 637-64-9, Name is Tetrahydrofurfuryl Acetate, molecular formula is C7H12O3. In a Article，once mentioned of 637-64-9

Layered zirconium sulfophenyl phosphonate was found to be an efficient heterogeneous catalyst for the acetylation of alcohols and phenols.

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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

13031-04-4, Name is 4,4-Dimethyldihydrofuran-2,3-dione, belongs to tetrahydrofurans compound, is a common compound. Product Details of 13031-04-4In an article, once mentioned the new application about 13031-04-4.

The invention provides a polishing composition and a method of chemically-mechanically polishing a substrate comprising a noble metal, the polishing composition comprising (a) an oxidizing agent that oxidizes a noble metal, (b) an anion selected from the group consisting of sulfate, borate, nitrate, and phosphate, and (c) a liquid carrier. The invention further provides a polishing composition and a method of chemically-mechanically polishing a substrate comprising ruthenium, the polishing composition comprising (a) an oxidizing agent that oxidizes ruthenium above the +4 oxidation state, (b) a polishing additive selected from the group consisting of metal sequestering polymers, metal chelators, organic thiols, compounds that reduce ruthenium tetraoxide, lactones, and ±-hydroxycarbonyl compounds.

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Reference：
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem