95745-36-1Relevant articles and documents
Organocatalytic combinatorial synthesis of quinazoline, quinoxaline and bis(indolyl)methanes
Badri, Rashid,Khaksar, Samad,Malamiri, Fatemeh,Tahanpesar, Elham
, p. 83 - 88 (2020/03/30)
Aims and Objective: An efficient and practical procedure for the synthesis of heterocyclic compounds such as quinazolines, quinoxalines and bis(indolyl)methanes was developed using 3,5-bis(trifluoromethyl) phenyl ammonium hexafluorophosphate (BFPHP) as a novel organocatalyst. Materials and Methods: All of the obtained products are known compounds and identified by IR, 1HNMR, 13CNMR and melting points. Result: Various products were obtained in good to excellent yields under reaction conditions Conclusion: The BFPHP organocatalyst demonstrates a novel class of non-asymmetric organocatalysts, which has gained much attention in green chemistry.
Green and efficient synthesis of aryl/alkylbis(indolyl)methanes using Expanded Perlite-PPA as a heterogeneous solid acid catalyst in aqueous media
Esmaielpour, Marzieh,Akhlaghinia, Batool,Jahanshahi, Roya
, p. 313 - 328 (2017/03/23)
Expanded Perlite-Polyphosphoric acid (EP-PPA) as a novel, efficient, recyclable and eco-benign heterogeneous catalyst has been applied for the green and rapid synthesis of aryl/alkylbis(indolyl)methanes, in water, in good to excellent yields. The catalyst
Starch as a green source for Fe3O4@carbon core-shell nanoparticles synthesis: A support for 12-tungstophosphoric acid, synthesis, characterization, and application as an efficient catalyst
Rafiee, Ezzat,Khodayari, Maryam
, p. 3523 - 3536 (2016/04/05)
12-Tungstophosphoric acid (PW) immobilized on carbon-coated Fe3O4 nanoparticles (Fe3O4@C-PW) was prepared through a combination of hydrothermal and chemical co-precipitation. The intermediate carbon layer, which was produced from starch as a green material, protects the magnetic core and also improves the dispersion and catalytic activity of the nanoparticles. Characterization of this catalyst was investigated by high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FT-IR), vibrating sample magnetometry, and the acidic properties were studied by NH3-temperature programmed desorption and potentiometric titration. The HRTEM image showed that the catalyst had a well-defined core-shell structure with an average particle size of 50 nm. The characterization data derived from FT-IR reveal that basic structure and geometry of the Keggin anion are preserved after synthesis of Fe3O4@C-PW. The as-prepared Fe3O4@C-PW was used as a nanocatalyst for the synthesis of various bis(indolyl)methanes and β-functionalized indoles in water. The catalyst can be recovered simply using an external magnetic field and reused several times without appreciable loss of its catalytic activity.