title: Medium-sized carbocycles by samarium diiodide-induced carbonyl-alkene cyclizations.
abstract: Intramolecular samarium diiodide-induced carbonyl-alkene or carbonyl-alkyne coupling reactions afforded without high dilution conditions 9- and 10-membered benzannulated carbocycles of type II and III in surprisingly good yields and stereoselectivities. A novel samarium diiodide-mediated cascade process leading to tricyclic compounds of type IV was also observed. Bisbenzannulated 10- and 11-membered carbocycles were prepared in very good yields.
authors: Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany.
authors: Jakub
authors: J
authors: Saadi
authors: Dieter
authors: D
authors: Lentz
authors: Hans-Ulrich
authors: HU
authors: Reissig
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D002384:Catalysis; D003500:Cyclization; D007454:Iodides / Q000737:chemistry*; D015394:Molecular Structure; D012493:Samarium / Q000737:chemistry*
chemical_list: D000475:Alkenes; D007454:Iodides; D012493:Samarium; C409809:samarium diiodide