Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, I.R. IRAN
Abstract
The reaction of 2-naphthol and p-substituted phenols with glyoxal in presence of 1-(4-sulfonylbutyl) pyridinium hydrogensulfate[Py-(CH2)4SO3H][HSO4], a Brønsted acidic ionic liquid, as a green catalyst was studied. The effects of solvent, amount of catalyst, temperature, and time on the yield of the reaction was investigated. It was found, that the use of 5% mol ratio of catalyst (mol percentage of IL to glyoxal) at 80 °C in solvent-free condition gave good yield (80%). The products were characterized based on FT-IR, 1H-NMR, 13C-NMR spectra, and comparison of melting point with an authentic sample. The NMR spectra indicated that the compounds had the acetal structure, nor ether.
Niroomand, S., Behmadi, H., Pordel, M., & Allameh, S. (2019). Regioselective Synthesis of
Dihydrobenzofuro[2,3-b]benzofuran by Reaction of Phenols with Glyoxal Using a Brønsted Acidic Ionic Liquid. Nashrieh Shimi va Mohandesi Shimi Iran, 38(2), 107-114.
MLA
Sahar Niroomand; Hossein Behmadi; Mehdi Pordel; Sadegh Allameh. "Regioselective Synthesis of
Dihydrobenzofuro[2,3-b]benzofuran by Reaction of Phenols with Glyoxal Using a Brønsted Acidic Ionic Liquid". Nashrieh Shimi va Mohandesi Shimi Iran, 38, 2, 2019, 107-114.
HARVARD
Niroomand, S., Behmadi, H., Pordel, M., Allameh, S. (2019). 'Regioselective Synthesis of
Dihydrobenzofuro[2,3-b]benzofuran by Reaction of Phenols with Glyoxal Using a Brønsted Acidic Ionic Liquid', Nashrieh Shimi va Mohandesi Shimi Iran, 38(2), pp. 107-114.
VANCOUVER
Niroomand, S., Behmadi, H., Pordel, M., Allameh, S. Regioselective Synthesis of
Dihydrobenzofuro[2,3-b]benzofuran by Reaction of Phenols with Glyoxal Using a Brønsted Acidic Ionic Liquid. Nashrieh Shimi va Mohandesi Shimi Iran, 2019; 38(2): 107-114.