title: Synthesis and analysis of some bis-heterocyclic compounds containing sulphur.
abstract: A facile and convenient synthesis of a series of bisheterocycles 7a,b 10, 12 and 13a,b containing a thieno[2,3-b]thiophene base unit via the versatile, hitherto unreported 3-[3,4-dimethyl-5-(3-nitrilopropanoyl)thieno[2,3-b]thiophen-2-yl]-3-oxopropanenitrile (4) is described.
authors.affiliation: Department of Chemistry, King Saud University, King Saud University, Riyadh, Saudi Arabia. yahia@ksu.edu.sa
authors.forename: Yahia Nasser
authors.initials: YN
authors.lastname: Mabkhoot
mesh_terms: D006571:Heterocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry; D015394:Molecular Structure; D009570:Nitriles / Q000138:chemical synthesis / Q000737:chemistry; D011743:Pyrimidines / Q000138:chemical synthesis / Q000737:chemistry; D013457:Sulfur Compounds / Q000737:chemistry*; D013876:Thiophenes / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D006571:Heterocyclic Compounds; D009570:Nitriles; D011743:Pyrimidines; D013457:Sulfur Compounds; D013876:Thiophenes