title: Facile and convenient synthesis of new thieno[2,3-b]-thiophene derivatives.
abstract: A facile and convenient synthesis of bis(2-(1H-benzo[d]imidazol-2(3H)-ylidene)-3-oxopropanenitrile), bis((3-amino-5-(methylthio)-1H-pyrazol-4-yl)methanone) and bis(2-thioxo-1,2-dihydropyrimidine-5-carbonitrile) derivatives incorporating a thieno- [2,3-b]thiophene moiety via versatile, readily accessible diethyl 3,4-dimethylthieno-[2,3-b]thiophene-2,5-dicarboxylate is described.
authors.affiliation: Department of Chemistry, Faculty of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia. yahia@ksu.edu.sa
authors.forename: Yahia Nasser
authors.initials: YN
authors.lastname: Mabkhot
authors.forename: Nabila abd Elshafy
authors.initials: Na
authors.lastname: Kheder
authors.forename: Abdullah Mohammad
authors.initials: AM
authors.lastname: Al-Majid
mesh_terms: D013876:Thiophenes / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D013876:Thiophenes