title: Synthesis and chemical characterisation of some new diheteroaryl thienothiophene derivatives.
abstract: Treatment of 1-(5-acetyl-3,4-dimethythieno[2,3-b]thiophene-2yl)ethanone (1) with dimethylformamide dimethyl acetal afforded enaminone derivative 2, which reacted with amino derivatives to give the corresponding bis-pyrimidine, bis-pyrazole, bis-triazolo-pyrimidine and bis-benzoimidazopyrimidine derivatives.
authors: Department of Chemistry, Faculty of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia. yahia@ksu.edu.sa
authors: Yahia Nasser
authors: YN
authors: Mabkhot
authors: Abdullah Mohammad
authors: AM
authors: Al-Majid
authors: Abdullah S
authors: AS
authors: Alamary
mesh_terms: D007093:Imidazoles / Q000138:chemical synthesis / Q000737:chemistry; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry; D011743:Pyrimidines / Q000138:chemical synthesis / Q000737:chemistry; D013876:Thiophenes / Q000138:chemical synthesis* / Q000737:chemistry; D044366:Transition Temperature; D014230:Triazoles / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D007093:Imidazoles; D011720:Pyrazoles; D011743:Pyrimidines; D013876:Thiophenes; D014230:Triazoles