6640-92-2Relevant academic research and scientific papers
Solvent-free synthesis of trisphenols as starting precursors for the synthesis of calix[4]arenes using sulfonated multi-walled carbon nanotubes
Fareghi-Alamdari, Reza,Golestanzadeh, Mohsen,Zekri, Negar
, p. 3400 - 3412 (2016/05/09)
The condensation of phenol derivatives (12 substrates) with 2,6-bis(hydroxymethyl)phenols (BMP) (6 examples) is reported using sulfonated multi-walled carbon nanotubes (SO3H@MWCNTs) under solvent-free conditions as starting precursors for the synthesis of macrocyclic molecules of calix[4]arenes. The new protocol provides a series of trisphenol derivatives (21 examples) in high yields (up to 94%) and relatively short reaction times (15-120 min). Also, direct synthesis of calix[4]arenes from different trisphenols by use of the catalyst was reported (5 examples). Furthermore, the synthesized calix[4]arene was obtained using a one-pot method from simple and easily available starting materials such as p-cresol for the synthesis of 5,11,17,23-tetramethylcalix[4]arene-25,26,27,28-tetraol. Also, in this process SO3H@MWCNTs can be reused for seven runs with almost consistent efficiency and can be recovered by easy filtration.
An efficient synthetic approach to substituted trisphenols (phloroglucide analogues) using tungstosilicic acid in water
Fareghi-Alamdari, Reza,Khalafi-Nezhad, Ali,Zekri, Negar
, p. 887 - 892 (2014/04/03)
Tungstosilicic acid was found to be an efficient catalyst for the synthesis of trisphenols using the reaction of 2,6-bis(hydroxymethyl)phenols with phenols in an aqueous medium. The catalytic reactivity of tungstosilicic acid in boiling water was examined with a series of substrates, demonstrating that this catalyst is reactive in the presence of a variety of functionalities. Georg Thieme Verlag Stuttgart. New York.
Synthesis of polyfunctional aromatic ring systems (phloroglucide analogs) under microwave irradiation
Khalafi-Nezhad, Ali,Rad, Mohammad Navid Soltani,Hakimelahi, Gholam Hossein
, p. 2396 - 2403 (2007/10/03)
An efficient and rapid synthesis of phloroglucide analogs under microwave irradiation is described. The solid-phase condensation reaction of the 4-halo-2,6-bis(hydroxymethyl)phenols 1a,b with other substituted phenols in the presence of ZnCl2 afforded the target molecules in much higher yields than by classical solution-phase synthesis and allowed us to prepare new phloroglucide analogs possessing sensitive functional groups difficult to access by established means.
