title: Ruthenium-catalyzed transfer-hydrogenative cyclization of 1,6-diynes with hantzsch 1,4-dihydropyridine as a H2 surrogate.
abstract: The transfer-hydrogenative cyclization of 1,6-diynes with Hantzsch 1,4-dihydropyridine as a H2 surrogate was performed in the presence of a cationic ruthenium catalyst of the type [Cp'Ru(MeCN)3PF6]. Exocyclic 1,3-dienes or their 1,4-hydrogenation products, cycloalkenes, were selectively obtained, depending on the substrate structure and the reaction conditions.
authors.affiliation: Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601 (Japan), Fax: (+81) 52 747 6800. yamamoto-yoshi@ps.nagoya-u.ac.jp.
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: Shota
authors.initials: S
authors.lastname: Mori
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Shibuya
mesh_terms: D002384:Catalysis; D003500:Cyclization; D003516:Cycloparaffins / Q000737:chemistry*; D004095:Dihydropyridines / Q000737:chemistry*; D053280:Diynes / Q000737:chemistry*; D006865:Hydrogenation; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D003516:Cycloparaffins; D004095:Dihydropyridines; D053280:Diynes; D009942:Organometallic Compounds; C038806:1,4-dihydropyridine; D012428:Ruthenium
keywords: alkenes; alkynes; cyclization; ruthenium; transfer hydrogenation