Selective Homogeneous Palladium(0)-Catalyzed Hydrogenation of Alkynes to (Z)-Alkenes

Authors

  • Martijn W. van Laren,

    1. Institute of Molecular Chemistry, Inorganic Chemistry, Universiteit van Amsterdam, Nieuwe Achtergracht 166, NL-1018 WV Amsterdam (The Netherlands), Fax: (+31) 20-525-6456
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  • Cornelis J. Elsevier

    1. Institute of Molecular Chemistry, Inorganic Chemistry, Universiteit van Amsterdam, Nieuwe Achtergracht 166, NL-1018 WV Amsterdam (The Netherlands), Fax: (+31) 20-525-6456
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Abstract

Zero-valent palladium precatalysts containing rigid bidentate bis(arylimino)acenaphthene ligands (shown schematically) facilitate the highly stereoselective homogeneous catalytic hydrogenation of alkynes to (Z)-alkenes. Internal, terminal, aryl-substituted, and cyclic alkynes are suitable substrates, as are some enynes, which are chemoselectively hydrogenated to dienes. E=CO2Me; R1, R2=4-OCH3, 4-CH3, 2,6-(CH3)2.

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