Hétérocycles oxygénés (O)

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6-Bromo-3H-isobenzofuran-1-one is a selective solvent that can be used to extract 5-bromophthalide from an organic reaction mixture. It is also used in the preparation of anhydrides. 6-Bromo-3H-isobenzofuran-1-one reacts with acidifying agents, such as sulfuric acid or hydrochloric acid, to produce crystalline solids. The extraction of 5-bromophthalide can be accomplished by adding a solution of the 6-bromo compound to the reaction mixture and extracting it with ether.

2-(2-Pentenyl)furan is an odoriferous compound that is found in plants, animals, and dietary products. It is a volatile compound with a strong garlic-like odor. The 2-(2-pentenyl)furan molecule consists of two isoprene units linked together by a double bond. This compound can be used as a marker for the plant species Acacia spp., which has been shown to have anti-inflammatory properties. 2-(2-Pentenyl)furan may be formed by lipid peroxidation of polyunsaturated fatty acids during the process of cooking. This process can also produce other compounds such as 4-hydroxyoctanoic acid (4HOA), 4-hydroxypentanoic acid (4HPPA), and 3,4-dihydroxypentanoic acid (3,4DHPPA). These compounds are also found in various food products such as milk, eggs,

9-(β-D-xylofuranosyl)guanine (9XG) is a trifluoride. It is an antiviral agent that inhibits the growth of herpes virus, in particular by methylating guanosine to 9-methylguanosine in the viral DNA. 9XG binds to the viral DNA and prevents its replication through the inhibition of RNA synthesis. The drug is active against many different types of viruses and has been shown to be effective against tissue cultures infected with herpes virus. 9XG is synthesized from guanosine and boron trifluoride etherate, which are reacted at -78 degrees Celsius for three days. This yields a mixture of compounds with various peracylation groups, which are then separated by chromatography.

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2-Bromomethyl-2,3-dihydrobenzofuran is a brominating agent that is used to synthesize the corresponding brominated derivative, such as 2-bromo-5-methylphenol. This compound has been shown to be catalytic in the formation of electron densities, which may be due to its intramolecular mechanism. The hypothesized mechanism of this reaction is that it follows an electrophilic substitution process. An ion source was used to detect the presence of this compound and showed no evidence of its ineffectiveness.

Furan-3-ylboronic acid is a boronate ester that has been shown to inhibit the replication of the HIV-1 and HIV-2 replicons. Furan-3-ylboronic acid also inhibits the production of inflammatory cytokines like IL-8, TNFα, IL-6 and IL-10 as well as other proinflammatory mediators. Furan-3-ylboronic acid has also been shown to inhibit cancer cells by blocking the expression of various genes involved in cell cycle regulation, DNA repair, and apoptosis. Additionally, furan-3-ylboronic acid binds to receptors on human neutrophils, which leads to inhibition of serine protease activity.

4-Vinyl-2,3-dihydrobenzofuran is a divinylbenzene monomer that undergoes copolymerization, epoxidation, amination reactions and transfer reactions. It is a reactive compound that can be used in the production of polymers such as polystyrene. The reaction time, yields and the presence of other reagents are factors that need to be taken into consideration when using 4-vinyl-2,3-dihydrobenzofuran.

Furanoeudesma 1,3-diene is a chemical compound that has been shown to have potent antibacterial activity against bacteria such as Escherichia coli and Staphylococcus. Furanoeudesma 1,3-diene is a stereoselective inhibitor of the Gram-negative bacterial enzyme enoyl-ACP reductase (FabI). This inhibition prevents the production of fatty acids in bacteria, leading to cell death. Furanoeudesma 1,3-diene also has an inhibitory effect on chronic bronchitis. It can be found in skin care products or as an ingredient in lettuce leaves.

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(2S)-7-Chloro-3',4,6-Trimethoxy-5'-Methylspiro[1-Benzofuran-2,4'-Cyclohexa-2,5-Diene]-1',3-Dione is a synthetic macrocyclic compound with a molecular formula of C14H14ClO. It has been shown to have antifungal properties in microbial transformation and deuterated spectrometric studies. (2S)-7-Chloro-3',4,6-Trimethoxy-5'-Methylspiro[1-Benzofuran-2,4'-Cyclohexa-2,5--Diene]-1',3--Dione has been prepared by hydrogenation of the corresponding nitrosobenzene derivative. The nmr spectrum shows that the molecule consists of a 7 membered ring with two methoxy groups on the cyclopentane ring