title: Benzothieno and benzofurano annelated estranes.
abstract: The preparation of estrone derived benzothieno- and benzofurano fused steroids is described. Keystep is an intramolecular thienyl(/furyl)-ene-yne cyclization of 16-ethynyl-17-heterarylestra-1,3,5(10),16-tetraenes. The cyclization was carried out under Pt as well as under Ru catalysis.
authors.affiliation: Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Japan.
authors.forename: Masataka
authors.initials: M
authors.lastname: Watanabe
authors.forename: Shuntaro
authors.initials: S
authors.lastname: Mataka
authors.forename: Thies
authors.initials: T
authors.lastname: Thiemann
mesh_terms: D001391:Azo Compounds / Q000737:chemistry; D001572:Benzofurans / Q000737:chemistry; D002384:Catalysis; D003500:Cyclization; D004962:Estranes / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure
chemical_list: D001391:Azo Compounds; D001572:Benzofurans; D004962:Estranes; C105430:benzofuran