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  • Title: Ruthenium-catalyzed transfer-hydrogenative cyclization of 1,6-diynes with hantzsch 1,4-dihydropyridine as a H2 surrogate.
    Author: Yamamoto Y, Mori S, Shibuya M.
    Journal: Chemistry; 2013 Sep 02; 19(36):12034-41. PubMed ID: 23893911.
    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.
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