265315-70-6Relevant articles and documents
Nano-cell-OBF2: an efficient and cheap catalyst for one-pot synthesis of pyrano[4,3-b]pyrans under mild and green condition
Mousavi Khatat, Saeed,Sadeghi, Bahareh,Ghasemi, Maryam
, (2019)
Newly synthesized nano-cell-OBF2 catalyst was produced via boron trifluoride as lewis acid and nano cellulose as substrate. The obtained novel nanostructure has been assessed using Fourier transform infrared spectroscopy (FTIR), Field emission
Synthesis of a novel bifunctional oxyammonium-based ionic liquid: Application for the synthesis of pyrano[4,3-b]pyrans and tetrahydrobenzo[b]pyrans
Zarei, Azra,Yarie, Meysam,Zolfigol, Mohammad Ali,Niknam, Khodabakhsh
, p. 1120 - 1131 (2019/12/24)
In the present investigation, a novel bifunctional oxyammonium-based ionic liquid, namely, 2,2′-(ethane-1,2-diylbis[oxy])bis(ethan-1-aminium)-2,2,2-trifluoroacetate, was designed and synthesized. The structure of the titled ionic liquid was characterized
A novel amphipathic low-melting complex salt: An efficient homogeneous catalyst for synthesis of pyran-annulated heterocyclic scaffolds and pyrido[2,3-d]pyrimidines
Mirak-Mahaleh, Maedeh Saeedi,Rad-Moghadam, Kurosh
, (2020/04/02)
The reaction of triethyl(sulfonyl)ammonium chlorosulfonate with 1,1,3,3-tetramethylguanidine (TMG) gave a low-melting complex salt with amphipathic and acidic characters. The salt has a great tendency towards solvation of organic substrates upon slight heating, so it was employed as a homogeneous acidic and functional ionic liquid catalyst in the expedient synthesis of benzo[b]pyrans, pyrano[4,3-b]pyrans, pyrano[3,2-c]quinolones, and pyrido[2,3-d]pyrimidines. The catalytic activity of the complex salt is much better than the simple salts composing it. Spectroscopic studies and chemical analysis of the salt revealed that its empirical formula is in agreement with neutralization of TMG by two H2SO4 molecules. The HSO4 ? anions of the salt seem to form extensive H-bonding with the constituting ammonium cations and Cl?, resulting in melting point depression of the complex salt due to the melting points of pure triethylamine and TMG hydrochloride salts. Another significant feature of this solid salt is that it can preserve its composition even after several times of separation from aqueous extracts and can be handled easily without danger.
Nano-cell-OBF2: an efficient and cheap catalyst for one-pot synthesis of pyrano[4,3-b]pyrans under mild and green condition
Mousavi Khatat, Saeed,Sadeghi, Bahareh,Ghasemi, Maryam
, p. 56 - 62 (2019/05/24)
Newly synthesized nano-cell-OBF2 catalyst was produced via boron trifluoride as lewis acid and nano cellulose as substrate. The obtained novel nanostructure has been assessed using Fourier transform infrared spectroscopy (FTIR), Field emission
Zn(L-proline)2 as an efficient and reusable catalyst for the multi-component synthesis of pyran-annulated heterocyclic compounds
Tahmassebi, Daryoush,Blevins, John E.,Gerardot, Shori S.
, (2019/02/19)
We have developed a simple, straightforward and highly efficient multi-component one-pot synthesis of 2-amino-3-cyano-4H-pyrans and pyran-annulated heterocyclic compounds. Zn(L-proline)2 has been utilized as a mild and efficient Lewis acid cata
1H-imidazol-3-ium tricyanomethanide {[HIM]C(CN)3} as a nanostructured molten salt catalyst: application to the synthesis of pyrano[4,3‐b]pyrans
Zolfigol, Mohammad Ali,Yarie, Meysam,Baghery, Saeed,Khoshnood, Abbas,Alonso, Diego A.
, p. 3291 - 3305 (2017/04/21)
In this work, we have synthesized a novel nanostructured molten salt, 1H-imidazol-3-ium tricyanomethanide {[HIMI]C(CN)3} (1), as an efficient and green protocol-compatible catalyst. This new molten salt has been fully characterized b
Sodium ethylene diamine tetraacetate catalyzed synthesis of chromene derivatives via multi-component reactions at low catalyst loading
Chen, Lu,Lin, Jiaqi,Chen, Bin,Zhao, Liqin
, p. 6691 - 6700 (2017/10/06)
An efficient and practical protocol for the synthesis of chromenes derivatives catalyzed by a low-loading sodium ethylene diamine tetraacetate (2?mol%) as a catalyst via multicomponent reaction is reported. A wide range of aromatic aldehydes easily underg
Synthesis and characterization of novel magnetic nanoparticles supported imidazole ion as an efficient catalytic system for the three-component reaction of arylaldehydes, malononitrile and a-hydroxy or a-amino active methylene compounds
Zahedifar, Mahboobeh,Mohammadi, Pourya,Sheibani, Hassan
, p. 315 - 323 (2017/07/24)
Background: Recently, pyrimidine and chromene derivatives have concerned increasing attention because of the wide range of biological activities. Considering the prominence of pyrimidine and chromene derivatives, several procedures have been reported for the synthesis of these compounds. Herein, new magnetic nanoparticles supported ionic liquid has been evaluated for the synthesis of pyrimidine and chromene derivatives. Methods: In this method, pyrimidine and chromene compounds were synthesized by the multi-component reaction of aromatic aldehydes, malononitrile, and active methylene compounds in the presence of the new magnetic nanoparticles supported ionic liquid. The new nanocatalyst was characterized by using TEM, VSM, XRD and IR spectrum. Results: The remarkable advantages of this new procedure involve high yields, short experimental time, low cast and easy preparation of the catalyst and no need of any workup and purification. Magnetic properties of the catalyst led to the easy separation from the reaction mixture by using an external magnet. The catalyst can be reused several times in the desired reaction without significant decrease of its activity. Conclusion: An efficient and green method for the synthesis of chromene and pyrimidine compounds in the presence of magnetic nanoparticles supported ionic liquid have been developed. Thermal stability, low cost and easy synthesis of the catalyst, high yields, easy separation and purification of the product, short experimental time and using a green solvent such as water provided a useful and alternative method for such reactions.
Nano-cellulose-OSO3H as a new, green, and effective nano-catalyst for one-pot synthesis of pyrano [4,3-b] pyrans
Sadeghi,Sowlat Tafti
, p. 1375 - 1384 (2016/07/06)
A facile, green, and efficient method has been developed for the synthesis of biologically important pyrano [4,3-b] pyrans in the presence of nano-cellulose-OSO3H as a new solid acid catalyst. The reaction involves the use of 4-hydroxy-6-methyl
Method for preparing pyrano [4,3-b] pyran derivatives by basic ionic liquid catalysis
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Paragraph 0039; 0040; 0041, (2017/07/01)
The invention discloses a method for preparing pyrano [4,3-b] pyran derivatives by basic ionic liquid catalysis, and belongs to the technical field of preparation of chemical materials. The molar ratio of aromatic aldehyde to 4-hydroxy-6-methylpyrane-2-ke
