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Relevant bibliographies by topics / 5-dimethoxytetrahydrofuran

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Academic literature on the topic '5-dimethoxytetrahydrofuran'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "5-dimethoxytetrahydrofuran"

1

Singh, Dileep Kumar, and Mahendra Nath. "First synthesis of meso-substituted pyrrolo[1,2-a]quinoxalinoporphyrins." Beilstein Journal of Organic Chemistry 10 (April 8, 2014): 808–13. http://dx.doi.org/10.3762/bjoc.10.76.

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A synthetic protocol for the construction of new meso-substituted pyrrolo[1,2-a]quinoxalinoporphyrins is described starting from 5-(4-amino-3-nitrophenyl)-10,15,20-triphenylporphyrin. The reaction of this porphyrin with 2,5-dimethoxytetrahydrofuran, followed by the reduction of the nitro group in the presence of NiCl2/NaBH4 afforded 5-(3-amino-4-(pyrrol-1-yl)phenyl)-10,15,20-triphenylporphyrin. This triphenylporphyrin underwent a Pictet–Spengler cyclization after the reaction with various aromatic aldehydes followed by in situ KMnO4 oxidation to form target porphyrin analogues in good yields.

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2

Ikizler, Aykut A., and Haydar Yüksek. "Reaction of 4-Amino-4,5-dihydro-1H-1,2,4-triazol-5-ones with 2,5-Dimethoxytetrahydrofuran." Collection of Czechoslovak Chemical Communications 59, no. 3 (1994): 731–35. http://dx.doi.org/10.1135/cccc19940731.

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A number of studies involving some reactions of 4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones have been made in recent years. On the other hand, the reactions of some N-aminoheteroaryls with 1,4-diketones or 1,4-dialdehydes to give N,N'-linked biheteroaryls have also been reported. In the present study, a series of 3-alkyl-4-amino-4,5-dihydro-1H-1,2,4-triazol-5-ones I were condensed in good yields with the succinaldehyde equivalent, 2,5-dimethoxytetrahydrofuran to give N,N'-bis(3-alkyl-4,5-dihydro-1H-1,2,4-triazol-5-on-4-yl)-1,4-butanediimines II or 1-(3-alkyl-4,5-dihydro-1H-1,2,4-triazol-5-on-4

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3

IKIZLER, A. A., and H. YUEKSEK. "ChemInform Abstract: Reaction of 4-Amino-4,5-dihydro-1H-1,2,4-triazol-5-ones with 2,5- Dimethoxytetrahydrofuran." ChemInform 25, no. 32 (2010): no. http://dx.doi.org/10.1002/chin.199432137.

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4

Camero, César Muñoz, Antonio Vassallo, Marinella De Leo, Abeer Temraz, Nunziatina De Tommasi, and Alessandra Braca. "Limonoids from Aphanamixis polystachya Leaves and Their Interaction with Hsp90." Planta Medica 84, no. 12/13 (2018): 964–70. http://dx.doi.org/10.1055/a-0624-9538.

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AbstractA phytochemical study of n-hexane, CHCl3, and CHCl3-MeOH extracts of Aphanamixis polystachya leaves led to the isolation of 10 compounds. Five of them turned out to be new natural compounds, including two mexicanolide-type (1, 2) and three polyoxyphragmalin-type (3–5) limonoids, together with two known andirobin-type limonoids (6, 7) and three phenolic derivatives. The structures of the new compounds were established on the basis of spectroscopic methods to be 8-hydro-14,15-en-cabralin (1), 3-deacetyl-8-hydro-cabralin-14,15-en-3-one (2), 20,22-dihydroxy-21,23-dimethoxytetrahydrofuran k

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5

Ho, Yuh Wen, and Wei Hua Yao. "Thioxopyrimidine in Heterocyclic Synthesis III: Synthesis and Properties of Some Novel Heterocyclic Chalcone Derivatives Containing a Thieno[2,3-d]pyrimidine-Based Chromophore." Journal of Chemistry 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/649576.

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Cyclization of 4-methyl-2-phenyl-6-thioxo-1,6-dihydropyrimidine-5-carbonitrile1with chloroacetone in DMF in the presence of excess potassium carbonate anhydrous gave the 1-(5-amino-4-methyl-2-phenylthieno[2,3-d]pyrimidin-6-yl)ethanone3, which can react with 2,5-dimethoxytetrahydrofuran in glacial acetic acid producing the 1-[4-methyl-2-phenyl-5-(1H-pyrrol-1-yl)thieno[2,3-d]pyrimidin-6-yl]ethanone4. On the other hand, a series of novel 3-aryl-1-[4-methyl-2-phenyl-5-(1H-pyrrol-1-yl)-thieno[2,3-d]pyrimidin-6-yl]prop-2-en-1-one chalcone dyes6a—nwere obtained by the condensation reaction of 1-[4-me

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6

Saidov, N. B., V. A. Georgiyants, and N. V. Garnaya. "Synthesis of new potential biological active substances among 3-mercapto-4-amino-5-benzyl-1,2,4-triazol-4H derivatives." Farmatsevtychnyi zhurnal, no. 3 (September 4, 2018): 52–57. http://dx.doi.org/10.32352/0367-3057.3.15.01.

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Conventional approaches to the formation of 1,2,4-triazole ring allow to introduce different substituents into the heterocyclic ring during the synthesis of key intermediates stage. In continuation of previous studies the synthesis of 3-mercapto-4-amino-5-benzyl-1,2,4-triazole-4H derivatives is described. The aim of investigation was synthesis of a series of new derivatives of 3-mercapto-4-amino-5-benzyl-1,2,4-triazole, proving their structure by physico-chemical methods and planning of pharmacological screening using PASS. Phenylacetic acid ethyl ester has been used for the synthe

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7

Seyed, Hamed Mahdaviani, Soudbar Davood, and Parvari Matin. "[Ti(OC4H9)4/2,5-Dimethoxytetrahydrofuran/ TEA/Ethylene Chlorobromide] as a Novel Homogeneous Catalyst System Effective for the Ethylene Dimerization Reaction." May 21, 2011. https://doi.org/10.5281/zenodo.1079350.

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In the present research, the titanium-catalyzed ethylene dimerization and more specifically, the concomitant byproducts and polymer formation have been studied in the presence of 2,5-dimethoxytetrahydrofuran as an electron donor compound in the combination with triethylaluminium (TEA) as activator. Then, we added ethylene chlorobromide as a new efficient promoter to the relevant catalyst system. Finally, the behavior of novel homogeneous [Titanium tetrabutoxide (Ti(OC4H9)4)/2,5-dimethoxytetrahydrofuran/ TEA/ethylene chlorobromide] was investigated in the various operating conditions for the op

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8

Vidya, Kamatar Prashanth K. U. Channabasappa S. Hallikeri* Shrinivas D. Joshi. ""SYNTHESIS AND CHARACTERIZATION OF NEW PYRROLYL OXADIAZOLE AS ANTIMICROBIAL AGENTS"." March 21, 2023. https://doi.org/10.5281/zenodo.7755038.

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The various novel nitrogen containing heterocyclic compounds were synthesized and are screened for antibacterial and antitubercular activities, purity of newly synthesized compounds confirmed by using TLC and structures for the same compounds were confirmed by using IR, NMR, <sup>13</sup>C and Mass spectrum. Pyrrole ring was constructed by reacting benzocaine with 2, 5-dimethoxytetrahydrofuran in presence of glacial acetic acid to obtain ethyl 4-pyrrol-1-ylbenzoate (2) in good yield. Conversion of ethyl 4-pyrrol-1-ylbenzoate (2) into 4-pyrrol-1-yl-benzoic acid hydrazide (3), which was achieved

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