Category: 87219-29-2

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Transannular dipolar cycloaddition as an approach towards the synthesis of the core ring system of the sarain alkaloids

Intramolecular transannular dipolar cycloaddition was investigated as a key step in a synthetic approach to the core of the sarain alkaloids; although the use of an azomethine ylide was unsuccessful with the chosen aldehyde substrate, cycloaddition with a nitrone did give the alternative regioisomeric bridged cycloadduct.

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

Application of 87219-29-2, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.87219-29-2, Name is (S)-Benzyl (5-oxotetrahydrofuran-3-yl)carbamate, molecular formula is C12H13NO4. In a Article£¬once mentioned of 87219-29-2

Studies of the diastereoselective alkylation of enolate dianion of (S)-4-carboethoxymethyl-2-oxazolidinone

Diastereoselective alkylation of enolate dianion of (S)-4-carboethyoxymethyl-2-oxazolidinone has been studied. The increased anti-selectivity in the presence of HMPA was explained by stereoelectronic effect of the electron-rich nitrogen atom of the oxazolidinone amidate.

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

Related Products of 87219-29-2, Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. 87219-29-2, Name is (S)-Benzyl (5-oxotetrahydrofuran-3-yl)carbamate,introducing its new discovery.

The total synthesis of L-daunosamine

N,O-Dibenzyl-N-tert-butoxycarbonyl-L-homoserinal (7), obtained from L-aspartic acid, reacts with vinylmagnesium chloride to afford with high stereoselectivity compound 6 which is subsequently transformed into the derivative of L-daunosamine 15.

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

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Synthesis of the BCD Tricyclic Core of Densanins A and B

A substrate stereocontrolled synthesis of the BCD tricyclic ring system of densanins A and B has been developed. The key transformations include the assembling of ring B via an unprecedented tandem N-allylation/SN2? reaction and the construction of ring C via gold-catalyzed alkenylation of terminal alkyne and pyrrole.

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

Chemistry is traditionally divided into organic and inorganic chemistry. SDS of cas: 87219-29-2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent£¬Which mentioned a new discovery about 87219-29-2

Facile and chemoselective reduction of carboxylic acids to alcohols using BOP reagent and sodium borohydride

Hydroxybenzotriazolyl esters, formed in situ from carboxylic acids and BOP reagent, react with sodium borohydride in THF to give alcohols in high yields. This method is convenient, rapid and chemoselective, with such functional groups as nitro, halide, nitrile, azido and ester being unaffected.

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

87219-29-2, Name is (S)-Benzyl (5-oxotetrahydrofuran-3-yl)carbamate, belongs to Tetrahydrofurans compound, is a common compound. COA of Formula: C12H13NO4In an article, once mentioned the new application about 87219-29-2.

New methodology for the synthesis of unsaturated 8-, 9- and 10-membered lactams

Unsaturated 8-, 9- and 10-membered medium ring lactams 1 (n = 1, 2, 3) have been prepared in good yield by the Claisen rearrangement of the vinyl-substituted precursors 3 in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU).

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

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels. 87219-29-2, In a patent£¬Which mentioned a new discovery about 87219-29-2

APOPTOSIS-INDUCING AGENTS FOR THE TREATMENT OF CANCER AND IMMUNE AND AUTOIMMUNE DISEASES

Disclosed are compounds which inhibit the activity of anti-apoptotic Bcl-2 proteins, compositions containing the compounds and methods of treating diseases during which is expressed anti-apoptotic Bcl-2 protein.

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

87219-29-2, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.87219-29-2, Name is (S)-Benzyl (5-oxotetrahydrofuran-3-yl)carbamate, molecular formula is C12H13NO4. In a Article, authors is Seki, Masahiko£¬once mentioned of 87219-29-2

A novel synthesis of a key intermediate for (+)-biotin from L-aspartic acid

The aldol reaction of an N-Cbz-3-amino-4-butanolide 4, derived from L-aspartic acid, with formaldehyde gave the trans-disubstituted 3-amino-4-butanolide 5 stereoselectively. Following protection of the hydroxyl group of 5, amidation and oxidation provided the beta-substituted L-asparagine derivative 6. The Hofmann rearrangement of 6 with sodium hypochlorite in the presence of sodium hydroxide and subsequent hydrogenation gave the bicyclic lactone 11, which upon dibenzylation and thionation, gave the thiolactone 2, a key intermediate for the synthesis of (+)-biotin (1).

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

Chemistry can be defined as the study of matter and the changes it undergoes. 87219-29-2. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.87219-29-2, Name is (S)-Benzyl (5-oxotetrahydrofuran-3-yl)carbamate, molecular formula is C12H13NO4, introducing its new discovery.

beta-Pseudopeptide foldamers. the homo-oligomers of (4R)-(2-oxo-1,3-oxazolidin-4-yl)-acetic acid (D-Oxac)

A total synthesis in solution and a conformational analysis of the homo-oligomers of (4R)-(2-oxo-1,3-oxazolidin-4-yl)-acetic acid (D-Oxac) to the tetramer level are described. As the D-Oxac building block contains both an oxazolidin-2-one and a beta-amino acid group, it may represent a new type of conformationally constrained tool for the construction of beta-pseudopeptide foldamers. A conformational investigation using NMR and an extensive, unconstrained analysis with a Monte Carlo search to the octamer level, both in water and in chloroform, showed that these homo-oligomers tend to fold in a regular helical structure in a competitive solvent, such as water. Since aqueous solutions are of major relevance for biological systems, these molecules are good candidates for application to these environments.

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

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.87219-29-2,(S)-Benzyl (5-oxotetrahydrofuran-3-yl)carbamate,as a common compound, the synthetic route is as follows.

87219-29-2, Preparation of (S)-tert-butyl 3-(cyclopropyl(2,3-dichlorobenzyl)carbamoyl)-4-(4-hydroxyphenyl)-2-((methoxymethoxy)methyl)-5,6-dihydropyridine-1(2H)-carboxylate (4H) 4A (S)-Benzyl-4-(cyclopropyl(2,3-dichlorobenzyl)amino)-1-hydroxy-4-oxobutan-2-ylcarbamate (4A) Into a 100 mL round bottom flask fitted with a reflux condenser and a nitrogen inlet, N-(2,3-dichlorobenzyl)cyclopropanamine (30.3 g, 140.3 mmol) (Example 1A) and (S)-benzyl 5-oxotetrahydrofuran-3-ylcarbamate (22.0 g, 93.5 mmol) were added. The mixture was heated without solvent at 100 C. for 24 hours. Purification by column chromatography (5%->10% MeOH/dichloromethane) gave 22.0 g (52%) of 4A. ESI-MS:m/z 451.3 (M+H)+.

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Reference£º
Patent; Takeda Pharmaceutical Company Limited; US8129538; (2012); B1;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem