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Updated: Jan 25, 2026

Facile Preparation of 2Z,4E-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
Cationic Cobalt Porphyrin-Catalyzed Allylation of Aldehydes with Allyltrimethylsilanes
Rei Tomifuji1, Shota Masuda1, Takuya Kurahashi1
1Department of Material Chemistry, Graduate School of Engineering , Kyoto University , Kyoto 615-8510 , Japan.
Abstract:
Cationic cobalt porphyrin-catalyzed allylation of aldehydes with allyltrimethylsilanes is developed. The formation of the aldehyde-cobalt porphyrin complex, the key intermediate for the addition of allylsilanes, is confirmed by theoretical studies and synchrotron-based X-ray absorption fine-structure measurements. Facile dissociation of the product by allylation from the cobalt complex regenerates the active complex with the aldehyde. The readily obtainable [Co(TPP)]SbF6 complex serves as an efficient catalyst for this allylation.
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