Category: 37443-42-8

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about A scalable chemoenzymic preparation of (R)-tetrahydrofuran-2-carboxylic acid, the main research direction is chemoenzymic asym preparation tetrahydrofurancarboxylic acid; protease asym preparation tetrahydrofurancarboxylic acid.COA of Formula: C6H10O3.

To develop a practical scalable approach to (R)-tetrahydrofuran-2-carboxylic acid (I), a chiral building block for furopenem, enantioselective hydrolysis of its esters is explored: When Et (±)-tetrahydrofuran-2-carboxylate (II, 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 I in 94.4% ee. On separation from the leftover antipodal (S)-II by partition, I is treated with dicyclohexylamine in Me Et ketone/methanol (5:1) to precipitate the crystalline salt that contains I of >99% ee in 22% overall yield from II.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Reactions of furan compounds. IV. High-temperature decomposition of the vapors of tetrahydrofuronitrile and Me tetrahydrofuroate to give 2,3-dihydrofuran and cyclopropanealdehyde》. Authors are Wilson, Christopher L..The article about the compound:Methyl tetrahydrofuran-2-carboxylatecas:37443-42-8,SMILESS:O=C(C1OCCC1)OC).Quality Control of Methyl tetrahydrofuran-2-carboxylate. Through the article, more information about this compound (cas:37443-42-8) is conveyed.

Tetrahydrofuramide (I) is not dehydrated by COCl2 at high temperatures At 360-400° over silica gel, I gives a mixture of tetrahydrofuronitrile (II) and 2,3-dihydrofuran (III), together with some HCN; the yield of II at 290° was 74%, at 310° 55%, and at 330° 40% (yields are based on consumption, see Part III); over Na phosphate (pumice impregnated with 120 g. NaH2PO4 and 15 cc. H3PO4 in 85 cc. H2O and dried by heating slowly to 300°) at 400° the yield of II was 90%, consumption of I 50-85%. With N as carrier gas (2 l./hr.), 70% of II was recovered when passed over earthenware rings at 450°; 10% was impure III. Silica gel at 500° gives 20% of tetrahydrofuran (IV)-III mixture (48% of III), 10% of unchanged II and 10% of a compound (V), which may be CH2.CH2.C:CHCN, b. 130-40°. Na phosphate at 500° gives HCN, only a little III + IV and mainly cyclopropanecarboxaldehyde (VI), b14 42-4°; 2,4-dinitrophenylhydrazone, orange-red, m. 173-5°; p-nitrophenylhydrazone, golden-yellow, m. 129-32°; dimedon derivative, m. 160-2°. NH4 tetrahydrofuroate (aqueous solution containing an excess of NH3) over earthenware rings gives an equimol. mixture of the free acid and I; over silica gel at 500-600° V and II were formed; over Na phosphate, the temperature and carrier gas (N, CO2) appeared to have little influence on the results; between 450-550° there resulted 20-30% of a product b. 45-90° containing MeOH, III, and VI; over silica gel at 375°, the products were III and PrCHO (2,4-dinitrophenylhydrazone, orange-brown, m. 120-5°); at 400°, the ester gives 30% of a liquid containing some III and VI. VI was prepared in about 20% yield from Cl(CH2)3CN and SnCl2 in ether (saturated with HCl).

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Rashed, Nurnobi Md.; Masuda, Koichiro; Ichitsuka, Tomohiro; Koumura, Nagatoshi; Sato, Kazuhiko; Kobayashi, Shu researched the compound: Methyl tetrahydrofuran-2-carboxylate( cas:37443-42-8 ).Related Products of 37443-42-8.They published the article 《Zirconium Oxide-Catalyzed Direct Amidation of Unactivated Esters under Continuous-Flow Conditions》 about this compound( cas:37443-42-8 ) in Advanced Synthesis & Catalysis. Keywords: amine ester zirconium catalyst amidation green chem; amide preparation. We’ll tell you more about this compound (cas:37443-42-8).

A sustainable and environmentally benign direct amidation reaction of unactivated esters with amines was developed in a continuous-flow system. A com. available amorphous zirconium oxide was found to be an efficient catalyst for this reaction. While the typical amidation of esters with amines required a stoichiometric amount of a promoter or metal activator, the present continuous-flow method enabled the direct amidation reaction under additive-free conditions with an extensive diversity towards various functional groups. High yields of the products were obtained with a nearly equimolar proportion of starting materials to reduce byproduct formation, which rendered this process applicable for use in a sequential-flow system.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Methyl tetrahydrofuran-2-carboxylate( cas:37443-42-8 ) is researched.Formula: C6H10O3.Feng, Ze Wang; Zhao, Xin Qi; Bi, Hua published the article 《Selective esterification of non-conjugated carboxylic acids in the presence of conjugated or aromatic carboxylic acids over active carbon supported methanesulfonic acid》 about this compound( cas:37443-42-8 ) in Science in China, Series B: Chemistry. Keywords: carboxylic acid nonconjugated selective esterification conjugated aromatic carboxylic acid; ester preparation active carbon supported methanesulfonic acid catalyst. Let’s learn more about this compound (cas:37443-42-8).

Non-conjugated carboxylic acids are selectively esterified in good yields in the presence of conjugated or aromatic carboxylic acids by stirring over active carbon supported methanesulfonic acid in dichloromethane at room temperature

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about Antitumor activity of SRI 62-834, a cyclic ether analog of ET-18-OCH3, the main research direction is SRI 62834 preparation antitumor; blood platelet aggregation inhibitor SRI 62834; tatrahydrofuran ether phospholipid analog preparation antitumor.Name: Methyl tetrahydrofuran-2-carboxylate.

SRI 62-834 (I), an analog of the antitumor agent ET-18-OCH3 in which the O atom at C atom 2 was incorporated into a 5-membered heterocycle, was prepared and exhibited good cytotoxicity in vitro against a variety of tumor cell lines and was as effective as Et-18-OCH3 given orally to mice with Meth A sarcomas. SRI 62-834 inhibited platelet-derived growth factor, possibly at the receptor level, and platelet-activating factor at the receptor level.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Synthesis of mono-acylation piperazine compounds, published in 2010-12-31, which mentions a compound: 37443-42-8, Name is Methyl tetrahydrofuran-2-carboxylate, Molecular C6H10O3, Recommanded Product: Methyl tetrahydrofuran-2-carboxylate.

1-(2-Furoyl)piperazine (90.6%) and 1-(terahydro-2-furoyl)piperazine were synthesized by the esterification of 2-furoic acid and 2-tetrahydrofuroic acid with methanol, and then amidation with piperazine, resp. The structures were characterized by 1H NMR and IR.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Mendes da Silva, Joaquim Fernando; Walters, Marcus; Al-Damluji, Saad; Ganellin, C. Robin researched the compound: Methyl tetrahydrofuran-2-carboxylate( cas:37443-42-8 ).Application of 37443-42-8.They published the article 《Molecular features of the prazosin molecule required for activation of Transport-P》 about this compound( cas:37443-42-8 ) in Bioorganic & Medicinal Chemistry. Keywords: prazosin analog preparation activation Transport P amine. We’ll tell you more about this compound (cas:37443-42-8).

Closely related structural analogs of prazosin have been synthesized and tested for inhibition and activation of Transport-P in order to identify the structural features of the prazosin mol. that appear to be necessary for activation of Transport-P. So far, all the compounds tested are less active than prazosin. It is shown that the structure of prazosin appears to be very specific for the activation. Only quinazolines have been found to activate, and the presence of the 6,7-dimethoxy and 4-amino groups appears to be critically important.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Electric Literature of C6H10O3. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about Chiral ammonium hypoiodite salt-catalyzed enantioselective oxidative cycloetherification to 2-acyl tetrahydrofurans.

Chiral quaternary ammonium hypoiodite salt-catalyzed enantioselective oxidative cycloetherification of δ-hydroxyketone derivs was achieved . The corresponding 2-acyl tetrahydrofurans were obtained in high chem. yield with high enantioselectivity.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about Bulky diarylammonium arenesulfonates as mild and extremely active dehydrative ester condensation catalysts.Synthetic Route of C6H10O3.

Bulky diarylammonium pentafluorobenzenesulfonates and tosylates serve as extremely active dehydration catalysts for the ester condensation reaction of carboxylic acids with equimolar amounts of sterically demanding alcs. and acid-sensitive alcs. Typically, the esterification reaction is performed in heptane by heating at 80 °C in the presence of 1 mol% of the catalyst without removing water. Esterification with primary alcs. proceeds without solvents even at room temperature Furthermore, 4-(N-mesitylamino)polystyrene resin-bound pentafluorobenzenesulfonate can be recycled more than 10 times without a loss of activity.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Nguyen, D. Thao; Lenstra, Danny C.; Mecinovic, Jasmin researched the compound: Methyl tetrahydrofuran-2-carboxylate( cas:37443-42-8 ).Name: Methyl tetrahydrofuran-2-carboxylate.They published the article 《Chemoselective calcium-catalyzed direct amidation of carboxylic esters》 about this compound( cas:37443-42-8 ) in RSC Advances. Keywords: amide green preparation chemoselective; carboxylic ester primary amine calcium catalyst amide bond formation. We’ll tell you more about this compound (cas:37443-42-8).

Unactivated carboxylic esters and primary amines undergo calcium-catalyzed direct amide bond formation to afford amides I [R1 = n-Pr, Ph, 4-hydroxybutyl, etc.; R2 = 2-thienyl, Ph, Bn, etc.] in excellent yields under homogeneous conditions in toluene. This green and mild reaction proceeds chemoselectively with esters, whereas related carboxylic acids and amides remain unreactive.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics