CuO nanoparticles catalyzed simple and efficient synthesis of 2,3-dihydroquinazolin-4(1H)-ones and quinazolin-4(3H)-ones under ultrasound irradiation in aqueous ethanol under ultrasound irradiation in aqueous ethanol
A CuO nanoparticle-catalyzed one-pot process has engineered for the preparation of diverse quinazolinones from the readily available isatoic anhydride, aldehydes and amine or ammonium. For amine substrates the reactions afford 2,3-dihydroquinazolin-4(1H)-ones in aqueous ethanol promoted by ultrasound irradiation. However, the ammonium substrates undergo intramolecular electron transfer and rearrangement
Succinimide-N-sulfonic Acid Promoted Efficient, One-Pot,
Three Component Synthesis of 2,3-Dihydroquinazolin-4(1H)-ones
作者:Sagar R. Kande
DOI:10.14233/ajchem.2022.23996
日期:——
A series of 2,3-dihydroquinazolin-4(1H)-ones has been synthesized using a simple, effective, one-pot, three component condensation of isatoic anhydride, aromatic aldehydes and amines in refluxing ethyl alcohol. It has been found that 15 mol% succinimide-N-sulfonic acid is the optimum amount of catalyst to obtain the high yield.
Acetic acid-promoted, efficient, one-pot synthesis of 2,3-dihydroquinazolin-4(1H)-ones
作者:Zahed Karimi-Jaberi、Reza Arjmandi
DOI:10.1007/s00706-011-0494-6
日期:2011.6
A simple, efficient, and general method has been developed for one-pot, three-component synthesis of 2,3-dihydroquinazolin-4(1H)-one derivatives based on a condensation reaction strategy of isatoic anhydride, aldehydes, and amines using acetic acid under reflux conditions.