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Iron-Catalyzed Enyne Cross-Coupling Reaction

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journal contribution
posted on 04.12.2008, 00:00 authored by Takuji Hatakeyama, Yuya Yoshimoto, Toma Gabriel, Masaharu Nakamura
In the presence of 0.5−1 mol % of FeCl3 with lithium bromide as a crucial additive, alkynyl Grignard reagents, prepared from the corresponding alkynes and methylmagnesium bromide, react with alkenyl bromides or triflates to give the corresponding conjugated enynes in high to excellent yields. The reaction shows wide applicability to various terminal alkynes and alkenyl electrophiles.