Category: Tetrahydrofurans

HPLC of Formula: 696-59-3In 2021 ,《N,N-Dimethylformamide as Carbon Synthons for the Synthesis of N-Heterocycles: Pyrrolo/Indolo[1,2-a]quinoxalines and Quinazolin-4-ones》 appeared in Journal of Organic Chemistry. The author of the article were Li, Shichen; Ren, Jianing; Ding, Chengcheng; Wang, Yishou; Ma, Chen. The article conveys some information:

N,N-dimethylformamide (DMF) as synthetic precursors contributing especially the Me, acyl, and amino groups has played a significant role in heterocycle syntheses and functionalization. In this protocol, a wide range of pyrrolo[1,2-a]quinoxalines I (R = H, Cl, Me; R1 = H, Cl, Me; R2 = H, Cl, F, Br, Me, OMe; R3 = H, Cl, F, Br, Me, CN), II /indolo[1,2-a]quinoxalines III (R4 = H, Cl, Me, CN, etc.; R5 = H, F, Cl, Me) and quinazolin-4-ones IV (R6 = H, 4-Cl, 4-NO2, 5-Fl, 5-Br; R7 = n-Bu, cyclohexyl, Ph, Bn, etc.) were obtained in moderate to good yields by using elemental iodine without any metal or peroxides. N-Me and N-acyl of DMF that participate and complete the reaction sep. through different mechanisms, which displayed potential still to be explored of DMF were considered. In addition to this study using 2,5-Dimethoxytetrahydrofuran, there are many other studies that have used 2,5-Dimethoxytetrahydrofuran(cas: 696-59-3HPLC of Formula: 696-59-3) was used in this study.

2,5-Dimethoxytetrahydrofuran(cas: 696-59-3) is a member of ether. Friedel Crafts reaction, for example, adds an alkyl or acyl group to aromatic ethers when they react with an alkyl or acyl halide in the presence of a Lewis acid as a catalyst.HPLC of Formula: 696-59-3

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

《Regioselective condensation of hydroxyaromatic compounds with 2,5-dimethoxytetrahydrofuran: facile one-pot synthesis of new substituted diaryl-fused 2,8-dioxabicyclo[3.3.2]nonanes comprising central ketal moieties》 was published in New Journal of Chemistry in 2020. These research results belong to Rahmatpour, Ali. SDS of cas: 696-59-3 The article mentions the following:

A tandem one-pot double Friedel-Crafts alkylation/intramol. double cyclization process to conveniently assemble diaryl-fused 2,8-dioxabicyclo[3.3.2]nonanes with aryl substituents at the C-2 (β) position was developed. A series of new sym. 2,8-dioxabicyclo[3.3.2]nonanes fused with two Ph and two naphthyl groups was synthesized through a straightforward, one-pot protocol based on a two-component regioselective condensation reaction starting from 2,5-dimethoxytetrahydrofuran, p-substituted phenols and 2-naphthol, resp., using p-toluenesulfonic acid (PTSA) as a catalyst in methylene chloride in moderate to good yields and various substitutions on one reaction partner were tolerated. Four chem. bonds (two C-C bonds and two C-O bonds) and two seven-membered cycles were formed in a one-pot operation. In the case of condensation of 2,7-dihydroxynaphthalene with 2,5-dimethoxytetrahydrofuran, 8,16-ethano-16H-dinaphtho[2,1-d:1′,2′-g][1,3]dioxocin-2,14-diol was obtained in good yield.2,5-Dimethoxytetrahydrofuran(cas: 696-59-3SDS of cas: 696-59-3) was used in this study.

2,5-Dimethoxytetrahydrofuran(cas: 696-59-3) is a member of ether. Friedel Crafts reaction, for example, adds an alkyl or acyl group to aromatic ethers when they react with an alkyl or acyl halide in the presence of a Lewis acid as a catalyst.SDS of cas: 696-59-3

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

The author of 《Nucleophilic Substitution of Hydrogen Atom in Initially Inactivated Pyrrole Ring》 were Pozharskii, Alexander F.; Ozeryanskii, Valery A.; Dyablo, Olga V.; Pogosova, Olga G.; Borodkin, Gennady S.; Filarowski, Aleksander. And the article was published in Organic Letters in 2019. Formula: C6H12O3 The author mentioned the following in the article:

It has been found that 1-dialkylamino-8-(pyrrolyl-1)naphthalenes I[R = Me, Me; (CH2)4], upon treatment with an equimolar amount of HBF4 under ambient conditions, produce 1-dialkylammonium salts which are transformed into 7,7-dialkyl-7H-pyrrolo[1,2-a]perimidine-7-ium tetrafluoroborates II [R = Me, Me; (CH2)4, X =BF4], resp. The reaction proceeds in a highly selective manner and represents the first case of nucleophilic substitution of hydrogen in the initially inactivated pyrrole ring. The scope and limitations of the transformation, apparently operating due to the joint action of the “”proximity effect”” and proton catalysis, are outlined. In the part of experimental materials, we found many familiar compounds, such as 2,5-Dimethoxytetrahydrofuran(cas: 696-59-3Formula: C6H12O3)

2,5-Dimethoxytetrahydrofuran(cas: 696-59-3) is a member of ether. When aromatic ethers are exposed to halogen in the presence or absence of a catalyst, they undergo halogenation, such as bromination.Formula: C6H12O3

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

In 2019,Advanced Synthesis & Catalysis included an article by Wei, Zhao; Zhang, Jinlong; Yang, Huameng; Jiang, Gaoxi. Reference of 2,5-Dimethoxytetrahydrofuran. The article was titled 《Bronsted Acid-Catalyzed Asymmetric Ring-Closing Alkylation of Inert N-substituted Pyrroles with α, β-Unsaturated Ketones》. The information in the text is summarized as follows:

A chiral Bronsted acid catalyzed asym. intramol. ring-closing alkylation of inert pyrroles with α, β-unsaturated ketones has been developed. This approach gave a wide range of 4-phenyl-4,5-dihydro-6H-benzo[f]pyrrolo[1,2-a]azepin-6-ones in high yields with good enantioselectivities under mild reaction conditions. The experimental process involved the reaction of 2,5-Dimethoxytetrahydrofuran(cas: 696-59-3Reference of 2,5-Dimethoxytetrahydrofuran)

2,5-Dimethoxytetrahydrofuran(cas: 696-59-3) is a member of ether. Friedel Crafts reaction, for example, adds an alkyl or acyl group to aromatic ethers when they react with an alkyl or acyl halide in the presence of a Lewis acid as a catalyst.Reference of 2,5-Dimethoxytetrahydrofuran

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

In 2019,Chemistry – An Asian Journal included an article by Ni, Jixiang; Jiang, Yong; Qi, Zhenjie; Yan, Rulong. Category: tetrahydrofurans. The article was titled 《TFAA-Catalyzed Annulation Synthesis of Spiro Pyrrolo[1,2-a]quinoxaline Derivatives from 1-(2-Aminophenyl)pyrroles and Benzoquinones/Ketones》. The information in the text is summarized as follows:

A metal-free trifluorosulfonate anhydride (TFAA)-catalyzed strategy for the synthesis of spiro pyrrolo[1,2-a]quinoxalines from 1-(2-aminophenyl)pyrroles and benzoquinones/ketones was developed. With this general method, spiro pyrrolo[1,2-a]quinoxalines were accessed via nucleophilic addition and cyclization. This reaction exhibited good functional group tolerance and a wide range of products were obtained in moderate to good yields. The results came from multiple reactions, including the reaction of 2,5-Dimethoxytetrahydrofuran(cas: 696-59-3Category: tetrahydrofurans)

2,5-Dimethoxytetrahydrofuran(cas: 696-59-3) is a member of ether. Friedel Crafts reaction, for example, adds an alkyl or acyl group to aromatic ethers when they react with an alkyl or acyl halide in the presence of a Lewis acid as a catalyst.Category: tetrahydrofurans

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

Saksena, Anil K.; Girijavallabhan, Viyyoor M.; Wang, Haiyan; Liu, Yi-Tsung; Pike, Russell E.; Ganguly, Ashit K. published their research in Tetrahedron Letters on August 5 ,1996. The article was titled 《Concise asymmetric routes to 2,2,4-trisubstituted tetrahydrofurans via chiral titanium imide enolates: key intermediates towards synthesis of highly active azole antifungals Sch 51048 and Sch 56592》.Application of 160709-02-4 The article contains the following contents:

Two complimentary approaches to the key (-)-(2R)-cis-tosylate I and its (+)-(2S)-enantiomer via generation of chiral imide enolates having a 2,2-disubstituted olefin functionality in the β-position, are described. In a “”protecting group free”” sequence, reaction of the titanium enolate generated from (4R)-benzyl-2-oxazolidinone derived imide II with s-trioxane provided a convenient oxazolidinone intermediate III which could be directly subjected to 2,4-diastereoselective iodocycln. In the experimental materials used by the author, we found ((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluorophenyl)tetrahydrofuran-3-yl)methanol(cas: 160709-02-4Application of 160709-02-4)

((3R,5R)-5-((1H-1,2,4-Triazol-1-yl)methyl)-5-(2,4-difluorophenyl)tetrahydrofuran-3-yl)methanol(cas: 160709-02-4) is a member of aromaticfluorinated building blocks. Depending on which substituents are present, fluoroaromatic intermediates can be converted into fluorinated or fluorine-free commercial end products.Fluorine-containing aromatics have been incorporated into drugs (hypnotics, tranquilizers, antiinflammatory agents, analgesics, antibacterials).Application of 160709-02-4

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