[1]JournaloftheChemicalSociety,1956,p.2253,2257
[2]HelveticaChimicaActa,1957,vol.40,p.554,558
Title: The unprecedented ring transformation from thiazoline-spiro-thiophene to thieno[2,3-b]pyrazine involved in the reaction of 2-thiocarbamoyl thiazolium salts with dimethyl acetylenedicarboxylate.
Journal: Chemical communications (Cambridge, England) 20071221