Category: Tetrahydrofurans

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Optimization of 2-(1H-imidazo-2-yl)piperazines series of Trypanosoma brucei growth inhibitors as potential treatment for the second stage of HAT

A previous publication from our laboratory reported the identification of a new class of 2-(1H-imidazo-2-yl)piperazines as potent T. brucei growth inhibitors as potential treatment for Human African Trypanosomiasis (HAT). This work describes the structure?activity relationship (SAR) around the hit compound 1, which led to the identification of the optimized compound 18, a single digit nanomolar inhibitor (EC50 7 nM), not cytotoxic and with optimal in vivo profile that made it a suitable candidate for efficacy studies in a mouse model mimicking the second stage of disease.

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

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COMPOUNDS

Anti-viral agents of compounds of Formula (I) : wherein A, R1, R2 and R3 are as defined in the specification, processes for their preparation and their use in HCV treatment are provided.

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

Reference of 15833-61-1, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.15833-61-1, Name is (Tetrahydrofuran-3-yl)methanol, molecular formula is C5H10O2. In a Patent，once mentioned of 15833-61-1

Process for the preparation of 3-methyltetrahydrofuran

Disclosed is a process for the preparation of 3-methyltetrahydrofuran (MeTHF) from 3-(hydroxymethyl)tetrahydrofuran (HOMeTHF) by contacting HOMeTHF with hydrogen in the presence of an acidic, supported catalyst comprising a Group VIII metal.

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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. category: Tetrahydrofurans. Introducing a new discovery about 4100-80-5, Name is 3-Methyldihydrofuran-2,5-dione

Efficient synthesis of spirolactones from cyclic anhydrides via an allylation/alkylation-RCM sequence

Starting from cyclic anhydrides the diallyl or dibutenyl lactones were obtained. The ring closing metathesis reaction of these using the Grubbs catalyst provided the corresponding spirolactones in good yields. With diallyl delta-lactone 2h, RCM occurred only in the presence of titanium tetraisopropoxide.

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

Reference of 4100-80-5, 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, 4100-80-5, molcular formula is C5H6O3, introducing its new discovery.

An efficient synthesis of low-covered polyrotaxanes grafted with poly(epsilon-caprolactone) and the mechanical properties of its cross-linked elastomers

Advanced polyrotaxane elastomers were fabricated by the synthesis of poly(epsilon-caprolactone)-grafted polyrotaxanes with significantly lower coverage than previously achieved. The time course for the complexation of alpha-cyclodextrin with an end-functionalized polyethylene glycol (PEG) was analyzed by subsequent end-capping and polyrotaxane isolation, which revealed that the bulkiness of the PEG end group affects the time required for complex nucleation and the resulting coverage. Low-coverage poly(epsilon-caprolactone)-grafted polyrotaxanes were synthesized in a facile and large-scale manner by optimizing the simultaneous hydrolysis of the end-capping groups and the solubility of the product during the ring-opening polymerization of epsilon-caprolactone. Cross-linking the thermoplastic graft polyrotaxanes yielded elastomers that are much more extensible than conventional elastomers with fivefold higher coverages. Elastomers with lower coverages behave as ideal elastic bodies due to chain sliding through the cross-links, which suggests that the arrangement entropy of the cyclic components, which counteracts chain sliding, is substantially decreased by reduced coverage.

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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. Recommanded Product: 16874-34-3. Introducing a new discovery about 16874-34-3, Name is Ethyl tetrahydrofuran-2-carboxylate

A scalable chemoenzymatic preparation of (R)-tetrahydrofuran-2-carboxylic acid

To develop a practical scalable approach to (R)-tetrahydrofuran-2-carboxylic acid (THFC) 1, a chiral building block for furopenem 2, enantioselective hydrolysis of its esters is explored: When ethyl (±)-tetrahydrofuran-2-carboxylate 3d (2 M, 288 g/L) is digested by an Aspergillus melleus protease {0.2% (w/v)} in a 1.5 M potassium phosphate buffer (pH 8) for 20 h, enantioselective hydrolysis proceeds with E=60 to give (R)-THFC 1 in 94.4% ee. On separation from the left-over antipodal ester (S)-3d by partition, (R)-THFC 1 is treated with N,N-dicyclohexylamine (DCHA) in methyl ethyl ketone/methanol (5:1) to precipitate the crystalline salt 4 that contains (R)-THFC 1 of >99% ee in 22% overall yield from (±)-3d.

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

Reference of 87392-07-2, Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. 87392-07-2, Name is (S)-Tetrahydrofuran-2-carboxylic acid,introducing its new discovery.

The most effective influence of 17-(3-ethoxypropyl) substituent on the binding affinity and the agonistic activity in KNT-127 derivatives, delta opioid receptor agonists

We investigated the structure-activity relationship of KNT-127 (opioid delta agonist) derivatives with various 17-substituents which are different in length and size. The 17-substituent in KNT-127 derivatives exerted a great influence on the affinity and agonistic activity for the delta receptor. While the compounds with electron-donating 17-substituents showed higher affinities for the delta receptor than those with electron-withdrawing groups, KNT-127 derivatives with 17-fluoroalkyl groups (the high electron-withdrawing groups) showed high selectivities for the delta receptor among evaluated compounds. In addition, the basicity of nitrogen as well as the structure of the 17-N substituent such as the length and configuration at an asymmetric carbon atom contributed to agonist properties for the delta receptor. Thus, the analog with a 17-(3-ethoxypropyl) group showed the best selectively and potent agonistic activity for the delta receptor among KNT-127 derivatives. These findings should be useful for designing novel delta selective agonists.

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

Chemistry is traditionally divided into organic and inorganic chemistry. name: Ethyl 2-oxotetrahydrofuran-3-carboxylate, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 77513-58-7

Highly Enantioselective Intermolecular Cu(I)-Catalyzed Cyclopropanation of Cyclic Enol Ethers. Asymmetric Total Synthesis of (+)-Quebrachamine

A set of cyclic enol ethers derived from 2,3-dihydrofuran 35 and 3,4-dihydropyran 8 with a varying substitution pattern at the olefinic system were synthesized. Evans’s ligand 5 with Cu(I)OTf was found to be an effective catalyst in the cyclopropanation reaction between cyclic enol ethers 14, 19, 28-31, and 33 and ethyl diazoacetate 6 to give diastereoselectivities up to exo/endo = 95:5 and enantioselectivities higher than 95% in nearly all cases. Because of the selective building of a quarternary carbon center and good yields in the formation of bicyclic structures 34c-h, the reaction was used as a key step in the asymmetric synthesis of (+)-quebrachamine 7, an indole alkaloid of the Aspidosperma family. After acid-induced ring opening of bicyclic compound 34f to lactone 40 followed by LiAlH4 reduction to the masked aldehyde 41, a reaction with tryptamine gave intermediate 42. This alcohol was efficiently converted into the indole alkaloid (+)-quebrachamine 7 in an overall yield of 37% starting from the chiral synthon 34f. Moreover it revealed the absolute configuration of the quarternary center of the cyclopropanation product 34f to be S.

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

Chemistry is traditionally divided into organic and inorganic chemistry. Recommanded Product: 453-20-3, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 453-20-3

A transition-metal-free Heck-type reaction between alkenes and alkyl iodides enabled by light in water

A transition-metal-free coupling protocol between various alkenes and non-activated alkyl iodides has been developed by using photoenergy in water for the first time. Under UV irradiation and basic aqueous conditions, various alkenes efficiently couple with a wide range of non-activated alkyl iodides. A tentative mechanism, which involves an atom transfer radical addition process, for the coupling is proposed.

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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, name: Furan-2,4(3H,5H)-dione, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 4971-56-6, Name is Furan-2,4(3H,5H)-dione, molecular formula is C4H4O3

Iminium Carbonic Acid Derivative Salts. VIII [1]. Electrophilic Reactions of 2-Methylthio-5,6-dihydro-1,3-thiazinium Iodides, 2-Methylthio-5,6-dihydrothiazolium Iodides and 5-Methyl-2-methylthiothiazolium Iodides. Part II. with Active Methylene Compounds

The title compounds 1a-c and 2 were reacted with several doubly activated methylene components to yield the cyclic ketene S,N-acetals 3-10.

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