Heterocyclic Building Blocks-Tetrahydrofuran

105-21-5, Name is Gamma-heptalactone, belongs to tetrahydrofurans compound, is a common compound. Formula: C7H12O2In an article, once mentioned the new application about 105-21-5.

The difference of volatile components in green, oolong and black teas was studied by using comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC × GC-TOFMS). Simultaneous distillation extraction was proved to be a suitable technique to extract the analytes with interest. A total of 450 compounds were tentatively identified with comparison to the standard mass spectra in available databases, retention index on the first dimension and structured chromatogram. 33 tea samples, including 12, 12 and 9 samples of green, oolong and black tea were analyzed by using GC × GC-TOFMS. After peak alignment, around 3600 peaks were detected. Partial least squares – discriminant analysis and hierarchical cluster analysis were used to classify these samples, then non-parametric hypothesis test (Mann-Whitney U test) and the variable importance in the projection (VIP) were applied to discover the key components to distinguish the three types of tea with significant difference amongst them. 74 differential compounds are defined to interpret the chemical differences of 3 types of tea. This study shows the power of GC × GC-TOFMS method combined with multivariate data analysis to investigate natural products with high complexity for information extraction.

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

Chemistry is traditionally divided into organic and inorganic chemistry. SDS of cas: 87392-07-2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 87392-07-2

Provided are a series of novel pyridine or pyrimidine derivatives which inhibit CDK9 and may be useful for the treatment of hyperproliferative diseases. In particular the compounds are of use in the treatment of proliferative disease such as cancer including hematological malignancies such as acute myeloid leukemia, multiple myeloma, chronic lymphocytic leukemia, diffuse large B cell lymphoma, Burkitt’s lymphoma, follicular lymphoma and solid tumors such as breast cancer, lung cancer, neuroblastoma and colon cancer.

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

Reference of 104227-71-6, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.104227-71-6, Name is (S)-tert-Butyl (5-oxotetrahydrofuran-3-yl)carbamate, molecular formula is C9H15NO4. In a Patent，once mentioned of 104227-71-6

The invention discloses a andrographolide compound, preparation method thereof, and the application of the pharmaceutical composition. The invention of andrographolide compound (I), an isomer, prodrug, solvate or pharmaceutically acceptable salt has the following structure. The invention of andrographolide compound has good for the treatment of inflammatory diseases, the inflammatory diseases including but not limited to possible by bacteria, virus and the like caused by pathogens, caused by autoimmune, radiation damage caused by, or other factors of inflammatory diseases. (by machine translation)

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

453-20-3, Name is 3-Hydroxytetrahydrofuran, belongs to tetrahydrofurans compound, is a common compound. Computed Properties of C4H8O2In an article, once mentioned the new application about 453-20-3.

The present invention relates to pharmaceutical agents of formula (I), useful for therapy and/or prophylaxis in a mammal, and in particular to inhibitors of NF-KB-inducing kinase (NIK – also known as MAP3K14) useful for treating diseases such as cancer, inflammatory disorders, metabolic disorders and autoimmune disorders. The invention is also directed to pharmaceutical compositions comprising such compounds, and to the use of such compounds or pharmaceutical compositions for the prevention or treatment of diseases such as cancer, inflammatory disorders, metabolic disorders including obesity and diabetes, and autoimmune disorders.

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

Application of 17347-61-4, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.17347-61-4, Name is 2,2-Dimethylsuccinicanhydride, molecular formula is C6H8O3. In a article，once mentioned of 17347-61-4

Substituted taraxastanes useful for treating viral infections, are provided herein. Thus, in a first aspect, the invention provides compounds of Formula I and the pharmaceutically acceptable salts thereof, wherein the variables R1, R2, and X are defined herein. The compounds described herein are thought to act by inhibiting retroviral maturation, including maturation of encapsulated retroviruses viruses, such as the HIV viruses, HIV-1 and HIV-2. Pharmaceutical compositions comprising such compounds of Formula I are included herein. Methods of using such compounds to treat human patients infected with an HIV virus and reducing the mortality of AIDS are also provided herein.

A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 17347-61-4

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

Electric Literature of 52079-23-9, 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 Patent, and a compound is mentioned, 52079-23-9, (S)-(-)-alpha-Hydroxy-gamma-butyrolactone, introducing its new discovery.

Selected compounds are effective for treatment of pain and diseases, such as inflammation mediated diseases. The invention encompasses novel compounds, analogs, prodrugs and pharmaceutically acceptable derivatives thereof, pharmaceutical compositions and methods for prophylaxis and treatment of diseases and other maladies or conditions involving pain, inflammation, and the like. The subject invention also relates to processes for making such compounds as well as to intermediates useful in such processes.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Electric Literature of 52079-23-9. In my other articles, you can also check out more blogs about 52079-23-9

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

Application of 453-20-3, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.453-20-3, Name is 3-Hydroxytetrahydrofuran, molecular formula is C4H8O2. In a Article，once mentioned of 453-20-3

Ethers are of fundamental importance in organic chemistry and they are an integral part of valuable flavors, fragrances, and numerous bioactive compounds. In general, the reduction of esters constitutes the most straightforward preparation of ethers. Unfortunately, this transformation requires large amounts of metal hydrides. Presented herein is a bifunctional catalyst system, consisting of Ru/phosphine complex and aluminum triflate, which allows selective synthesis of ethers by hydrogenation of esters or carboxylic acids. Different lactones were reduced in good yields to the desired products. Even challenging aromatic and aliphatic esters were reduced to the desired products. Notably, the in situ formed catalyst can be reused several times without any significant loss of activity. An assist from Al: A bifunctional catalyst system consisting of a Ru/phosphine complex and aluminum triflate allows selective hydrogenation of esters to ethers. A variety of lactones were reduced to the desired products in good yields. The catalyst further provides a general method for the reduction of linear esters and reductive etherification of carboxylic acids with alcohols.

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

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. COA of Formula: C5H8O2. Introducing a new discovery about 1679-47-6, Name is 3-Methyldihydrofuran-2(3H)-one

A series of 3,3a-dihydro-2H,9H-isoxazolo[3,2-b]-[1,3]benzoxazin 9-ones was synthesized and evaluated for anti-inflammatory, antipyretic and analgesic activity. Since many of these compounds exhibited promising activity, particularly in the anti-inflammatory tests, a number of homologous 2,3,4,4a-tetrahydro-10H-1,2-oxazino[3,2-b]-[1,3]benzoxazin 10-ones and one 3,4,5,5a-tetrahydro-2H, 11H-1,2-oxazepino [3,2-b] [1,3]benzoxazin-11-one, the 9-chloro analog, were also prepared and evaluated. The expanded ring members were generally less active than the tricyclic compounds containing the isoxazolidine rng.

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

Chemistry is traditionally divided into organic and inorganic chemistry. Product Details of 22530-98-9, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 22530-98-9

A number of furan-2-ylmethylidene-substituted lactones were synthesized by condensation of 5-alkylfuran-2(3H)-ones and 4-alkyldihydrofuran-2(3H)-ones with 5-substituted furan-2-carbaldehydes. The reactivity of furan-2(3H)-ones was higher than that of furan-2(5H)-ones due to formation of intermediate conjugated anion. The condensation of 4-alkyldihydrofuran-2(3H)-ones with furan-2-carbaldehydes required more severe conditions than the condensation with furan-2(3H)-ones. The substituent in the furan ring affects the reaction time and yield.

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

Related Products of 17347-61-4, 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, 17347-61-4, 2,2-Dimethylsuccinicanhydride, introducing its new discovery.

A respected number of drugs suffer from bitter taste which results in patient incompliance. With the aim of solving the bitterness of guaifenesin, dimethyl maleate, maleate, glutarate, succinate, and dimethyl succinate prodrugs were designed and synthesized. Molecular orbital methods were utilized for the design of the ester prodrugs. The density functional theory (DFT) calculations revealed that the hydrolysis efficiency of the synthesized prodrugs is significantly sensitive to the pattern of substitution on C=C bond and distance between the nucleophile and the electrophile. The hydrolysis of the prodrugs was largely affected by the pH of the medium. The experimental t1/2 for the hydrolysis of guaifenesin dimaleate ester prodrugs in 1N HCl was the least and for guaifenesin dimethyl succinate was the highest. Functional heterologous expression of TAS2R14, a broadly tuned bitter taste receptor responding to guaifenesin, and experiments using these prodrugs revealed that, while some of the prodrugs still activated the receptor similarly or even stronger than the parent substance, succinate derivatization resulted in the complete loss of receptor responses. The predicted binding modes of guaifenesin and its prodrugs to the TAS2R14 homology model suggest that the decreased activity of the succinate derivatives may be caused by a clash with Phe247.

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