Tag: M.W:100-200

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 89364-31-8, name is Tetrahydrofuran-3-carboxylic acid, introducing its new discovery. category: Tetrahydrofurans

This invention pertains to a process for making a-methylene-gamma-butyrolactone by acid-catalyzed rearrangement of tetrahydro-3-furoic acid. In a further embodiment, when tetrahydro-3-furoic acid is treated with acetic anhydride and an acid catalyst, a-acetoxymethyl-gamma-butyrolactone is produced in high yield. Under basic conditions, a-acetoxymethyl-gamma-butyrolactone can readily forma-methylene-gamma-butyrolactone by the elimination of acetic acid. These reactions provide a-methylene-gamma-butyrolactone by novel routes which do not require butyrolactone or formaldehyde.

We’ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 89364-31-8, and how the biochemistry of the body works.category: Tetrahydrofurans

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

Electric Literature of 4100-80-5, 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, 4100-80-5, 3-Methyldihydrofuran-2,5-dione, introducing its new discovery.

The gas-phase proton affinities (PA’s) of acetic anhydride, 1, and several representative cyclic anhydrides (succinic, 2; methylsuccinic, 3; glutaric, 4; and 3-methylglutaric, 5) were measured through the use of Fourier transform-ion cyclotron resonance and high-pressure chemical ionization techniques: PA(1) = 844 ± 1 kJ/ mol, PA(2) = 797 ± 1 kJ/mol, PA(3) = 807 ± 1 kJ/mol, PA(4) = 816 ± 3 kJ/mol, PA(S) = 820 ± 3 kJ/mol. The results were analyzed in the light of molecular orbital ab initio (MP2/6-31G*, G2) and density functional theory (B3LYP/6-31G*) calculations. The enol forms of acetic ahydride and its protonated counterparts were predicted to be significantly less stable than the corresponding diketo conformers. The large proton affinity of acetic anhydride takes its origin from the formation of an intramolecular hydrogen bond in the protonated form. This is supported by the computational results and by the measurement of a sizable entropy loss upon protonation. In contrast, the protonation of cyclic anhydrides is accompanied by an acyl bond fission, thus leading to an entropy gain upon protonation. The protonated structures of cyclic anhydrides are stabilized by an electrostatic attraction between the two opposite parts of the ion. This effect is more pronounced for glutaric derivatives, and this explains the enhancement of the proton affinity observed when the size of the ring increases. It is also related to the increase in entropy of protonation and to the observed methyl substitution effect.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Electric Literature of 4100-80-5. In my other articles, you can also check out more blogs about 4100-80-5

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

Electric Literature of 4971-56-6, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 4971-56-6, molcular formula is C4H4O3, introducing its new discovery.

3-Acyl(arylmethyleneacyl)tetronic acids were synthesized. Selective hydrogenation of the carbonyl group in the acyl fragment and reduction of the conjugated double bond afforded in high yield the corresponding 3-alkyl(aralkyl) derivatives possessing either natural or modified prostaglandin alpha-chain. Reduction of the conjugated double bond in vinylogous 3-alkyl(aralkyl)tetronic acid amides with sodium cyanotrihydridoborate gave a mixture of stereoisomeric beta-amino lactones which underwent retro-Michael elimination of the amine residue, leading to 3-alkyl(aralkyl)-2,5-dihydrofuran-2-ones. The latter can be regarded as synthons for 11-deoxy-10-oxaprostanoids.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 4971-56-6 is helpful to your research. Electric Literature of 4971-56-6

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

4971-56-6, Name is Furan-2,4(3H,5H)-dione, belongs to tetrahydrofurans compound, is a common compound. HPLC of Formula: C4H4O3In an article, once mentioned the new application about 4971-56-6.

Disclosed dihydropyridine compounds are the compounds possessing the following general formula (I) as shown in the specification, wherein R1 is selected from hydrogen, halogen, alkyl, substituted alkyl, alkoxy, substituted alkoxy, alkylamino, substituted alkylamino, aryl, substituted aryl, heteroaryl, substituted heteroaryl, heterocyclic groups, substituted heterocyclic groups, ester group and amide group; R2 is selected from hydrogen, cyanogroup, alkyl, substituted alky, alkenyl, substituted alkenyl and acyl; or R2 and R3 form a fused ring; R3 is selected from alkyl, substituted alkyl, aryl, substituted aryl, heteroaryl and substituted heteroaryl; or R3 and R2 or R4 form a fused ring; R4 is selected from hydrogen, alkyl and substituted alkyl; or R4 and R3 or R5 form a fused ring; R5 is selected form alkyl, substituted alky, aryl, substituted aryl, heteroaryl and substituted heteroaryl; or R5 and R4 form a fused ring. The invention also discloses a preparation method of the compounds of the general formula (I), compositions containing the compounds of the general formula (I), and applications of the compositions to medicaments for treating cancers.

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

Related Products of 637-64-9, Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. 637-64-9, Name is Tetrahydrofurfuryl Acetate,introducing its new discovery.

Supercritical liquefaction process is used for producing energy from biomass. The common reaction conditions for supercritical liquefaction process are the 240-380 C temperature range and 5-20 MPa pressure values range. Xanthium strumarium liquefaction experiments were performed in a cylindrical reactor (75 mL) in organic solvents (acetone, ethanol, methanol) under supercritical conditions with (zinc oxide, calcium hydroxide) and without catalyst at the temperatures of 250, 275 and 300 C. The produced liquids at 300 C in liquefaction were analyzed and characterized by Elemental, GC-MS and FT-IR. 36, 37 and 50 different types of compounds were identified by GC-MS obtained in acetone, ethanol and methanol respectively. The liquid product efficiency has been obtained at 300 C in acetone with zinc oxide catalyst (74.80%). The highest HHV value has been calculated as 32.16 MJ/kg with calcium hydroxide catalyst in acetone.

We’ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 637-64-9, and how the biochemistry of the body works.Related Products of 637-64-9

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

Reference of 1679-47-6, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 1679-47-6, molcular formula is C5H8O2, introducing its new discovery.

A novel enantioselective Pd-catalyzed intermolecular carboetherification of dihydrofurans is reported. The in situ generation of chiral bis-phosphine mono-oxide ligands is crucial, and a general catalytic system has been identified based on this approach. It provides access to a variety of fused tetrahydrofurobenzofurans in consistently high yield and enantiomeric excess.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 1679-47-6 is helpful to your research. Reference of 1679-47-6

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. Recommanded Product: 4,4-Dimethyldihydrofuran-2,3-dioneIn an article, once mentioned the new application about 13031-04-4.

Two irons for a smoother finish: An NAD(P)H model was regenerated readily in situ by iron-catalyzed reduction with molecular hydrogen. The subsequent biomimetic reduction of alpha-keto-/ alpha-iminoesters proceeded smoothly in the presence of an iron-based Lewis acid (LA) to provide alpha-hydroxyesters and amino acid esters in good to excellent yields (see scheme; NAD(P) +=nicotinamide adenine dinucleotide (phosphate), TM=transition metal). Copyright

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

Chemistry is traditionally divided into organic and inorganic chemistry. Computed Properties of C5H8O2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 1679-47-6

O-Alk-3-enyl- and O-alk-4-enyl-Se-phenylselenocarbonates undergo regio-specific exo cyclization to the corresponding gamma- and delta-lactones on treatment with tri-n-butylstannane and AIBN.

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

Electric Literature of 4971-56-6, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 4971-56-6, molcular formula is C4H4O3, introducing its new discovery.

A three-component reaction of an isocyanide, a dialkyl acetylenedicarboxylate, and tetronic acid in dichloromethane at room temperature afforded 4H-furo[3,4-b]pyran derivatives. These compounds are closely related with ring systems, TAN-2483B, TAN-2483A, and FD-211 which have a broad spectrum of biological activity.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 4971-56-6 is helpful to your research. Electric Literature of 4971-56-6

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

Synthetic Route of 15833-61-1, 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. 15833-61-1, Name is (Tetrahydrofuran-3-yl)methanol, molecular formula is C5H10O2. In a Patent，once mentioned of 15833-61-1

The present invention relates to synthesis of 3-tetrahydrofuran methanol method, the technical scheme is, in order to 2-bromo ethanol and diethyl malonate as the starting raw material, under the alkaline conditions, the reaction produces 2-hydroxy ethyl-malonic acid b ethyl ester, 2-hydroxy ethyl-malonic acid diethyl ester generating 2-hydroxy ethyl-malonic acid, 2-hydroxy ethyl-malonic acid to produce the catalytic high-pressure hydrogenation of 2-hydroxymethyl -1, 4-butanediol, 2-hydroxymethyl -1, 4-butanediol to dehydrate, ring and produce the 3-tetrahydrofuran methanol. The method provided by the invention, the yield can reach 85% or more, the purity can be up to 95% or more, of mild reaction conditions, low cost, simple operation, is suitable for industrial production. (by machine translation)

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Synthetic Route of 15833-61-1. In my other articles, you can also check out more blogs about 15833-61-1

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