title: Synthesis of tetrahydrobenzimidazo[1,2-b]quinazolin-1(2H)-one and tetrahydro-1,2,4-triazolo[5,1-b]quinazolin-8(4H)-one ring systems under solvent-free conditions.
abstract: Tetraheterocyclic benzimidazo[1,2-a]quinazolin-4(1H)-one and tetrahydro-1,2,4-triazolo[5,1-b]quinazolin-8(4H)-one were synthesized in relatively high yields by the condensation reaction of an aldehyde and a cyclic beta-diketone with 2-aminobenzothiazole, 2-aminobenzimidazole or 3-amino-1,2,4-triazole without using any catalyst under solvent-free conditions.
authors.affiliation: Department of Chemistry, Shahid Beheshti University, Tehran, Iran. a-shaabani@cc.sbu.ac.ir
authors.forename: Ahmad
authors.initials: A
authors.lastname: Shaabani
authors.forename: Elham
authors.initials: E
authors.lastname: Farhangi
authors.forename: Abbas
authors.initials: A
authors.lastname: Rahmati
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D000640:Amitrole / Q000737:chemistry*; D001562:Benzimidazoles / Q000138:chemical synthesis* / Q000737:chemistry*; D020650:Combinatorial Chemistry Techniques / Q000379:methods*; D015394:Molecular Structure; D011799:Quinazolines / Q000138:chemical synthesis* / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D014230:Triazoles / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D000447:Aldehydes; D001562:Benzimidazoles; D011799:Quinazolines; D012997:Solvents; D014230:Triazoles; C027391:2-aminobenzimidazole; D000640:Amitrole