Organic Chemistry Portal



Copper-Catalyzed Semihydrogenation of Alkynes to Z-Alkenes

Kazuhiko Semba*, Ryohei Kameyama, Yoshiaki Nakao*

*Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-Ku, Kyoto 615-8510, Japan, Email:,

K. Semba, R. Kameyama, Y. Nakao, Synlett, 2015, 26, 318-322.

DOI: 10.1055/s-0034-1379896

see article for more reactions


Copper-catalyzed semihydrogenation of internal alkynes proceeds under an atmosphere of hydrogen (5 atm) at 100 C in the presence of a readily available catalyst to give various Z-alkenes stereoselectively.

see article for more examples

Key Words

alkynes, alkenes, catalysis, copper, semireduction of alkynes, hydrogen

ID: J60-Y2015