Minoo Dabiri

TL;DR: Silica sulfuric acid as discussed by the authors can be used to catalyse the Biginelli reaction between an aldehyde, a β-dicarbonyl compound and urea or thiourea in refluxing ethanol.

TL;DR: KAl(SO4)2·12H2O was found to catalyze efficiently a one-pot three-component cyclocondensation of isatoic anhydride and primary amines or ammonia sources such as NH4 2CO3, NH4OAc and NH4Cl with aromatic aldehydes under mild conditions to afford the corresponding mono- and disubstituted 2,3-dihydroquinazolin-4(1H)-ones in good yields as mentioned in this paper.

TL;DR: In this article, a highly selective synthesis of 2-aryl-1-arylmethyl-1H-1,3-benzimidazoles from the reaction of o-phenylenediamines and aromatic aldehydes in the presence of silica sulfuric acid is reported.

TL;DR: Bronsted acidic ionic liquid, 1-methylimidazolium triflouroacetate ([Hmim]TFA) catalyzed synthesis of 1,8-dioxo-octahydroxanthenes and 1-8-decahydroacridines in excellent yields and short period of times at 80°C.

TL;DR: One-pot three-component condensation of isatoic anhy-dride with primary amines or ammonium carbonate and aromatic al- dehydes in refluxing ethanol in the presence of catalytic amounts of silica sulfuric acid afforded the corresponding 2,3-dihydroquinazo-lin-4(1H)-ones in high yields.