title: [Unexpected formation of spiro(benzofuran-2,2'-(1,4)benzothiazines) from aurones].
abstract: The reaction between (Z)-2-benzylidene-3-coumaranones (aurones) 4B, 2-aminothiophenol and sodium ethanolate does not give the expected benzofuro[2,3-c][1,5]benzothiazepines 7, but yields the spiro compounds 8. Their structures are confirmed by an X-ray analysis.
authors.affiliation: Institut für Pharmazeutische Chemie, Technischen Universität Braunschweig, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Görlitzer
authors.forename: M
authors.initials: M
authors.lastname: Wichers
authors.forename: P G
authors.initials: PG
authors.lastname: Jones
mesh_terms: D001572:Benzofurans / Q000138:chemical synthesis*; D018360:Crystallography, X-Ray; D004110:Diltiazem / Q000031:analogs & derivatives / Q000138:chemical synthesis; D007202:Indicators and Reagents; D008968:Molecular Conformation; D013843:Thiazines / Q000138:chemical synthesis*
chemical_list: D001572:Benzofurans; D007202:Indicators and Reagents; D013843:Thiazines; D004110:Diltiazem