title: The unexpected and facile molybdenum mediated formation of tri- and tetracyclic pentathiepins from pyrazine-alkynes and sulfur.
abstract: The synthesis of a novel family of pentathiepino-pyrrolo[1,2-a]pyrazine derivatives is reported. These compounds are formed by the reaction of alkynyl-substituted heterocyclic precursors with elemental sulfur in the presence of molybdenum oxo bis-tetrasulfide under very mild conditions.
authors.affiliation: School of Chemistry, Trinity College Dublin, College Green, Dublin 2, Ireland.
authors.forename: Muhammad
authors.initials: M
authors.lastname: Zubair
authors.forename: Ashta Chandra
authors.initials: AC
authors.lastname: Ghosh
authors.forename: Carola
authors.initials: C
authors.lastname: Schulzke
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D002384:Catalysis; D018360:Crystallography, X-Ray; D008968:Molecular Conformation; D008982:Molybdenum / Q000737:chemistry*; D011719:Pyrazines / Q000737:chemistry*; D011724:Pyridazines / Q000138:chemical synthesis / Q000737:chemistry*; D011758:Pyrroles / Q000138:chemical synthesis / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*; D013846:Thiepins / Q000737:chemistry*
chemical_list: D000480:Alkynes; D011719:Pyrazines; D011724:Pyridazines; D011758:Pyrroles; C508945:Pyrrolopyridazine; D013846:Thiepins; D013455:Sulfur; D008982:Molybdenum