Palladium-Catalyzed C-Allylation of Benzoins and an NHC-Catalyzed Three Component Coupling Derived Thereof: Compatibility of NHC- and Pd-Catalysts
摘要:
A large range of benzoins was successfully applied as C-nucleophiles in the palladium-catalyzed allylic alkylation with several allyl acetates, resulting in functionalized tertiary homoallylic alcohols. A number of unsymmetrical benzoins can be coupled with high levels of regio- and chemoselectivity. Finally, the challenging compatibility of free N-heterocyclic carbenes with a palladium catalyst has been utilized in a number of metal- and organocatalyzed three-component coupling reactions.
Efficient and sustainable one‐pot synthesis of α‐carbonyl homoallylic alcohols from benzaldehyde and allylic alcohols using both NHC and nickel catalysts
作者:Yasmina Homrani、Bouchaib Mouhsine、Aurélien Béthegnies、Mohamed Amin El Amrani、Abdallah Karim、Isabelle Suisse、Mathieu Sauthier
DOI:10.1002/cctc.202300038
日期:——
Tandem catalysis: α-carbonyl homoallylic alcohols are synthesized thanks to a tandem reaction that combines the benzoin condensation of aldehydes (synthesis of α-hydroxyketones) promoted by 1,3-dimethylimidazolium chloride/DBU system and the nickel-catalyzed allylic alkylation with allylicalcohol.
Photoinduced Platinum-Catalyzed Reductive Allylation of α-Diketones with Allylic Carbonates
作者:Junpei Shimosato、Masaya Sawamura、Yusuke Masuda
DOI:10.1021/acs.orglett.4c00091
日期:2024.3.15
A unique process for the photoinduced platinum-catalyzed reductiveallylation of α-diketones with allyliccarbonates has been developed. This allylation reaction was found to proceed selectively at the more electron-deficient carbonyl group of the diketone to afford an α-keto homoallylic alcohol. Such products could be further derivatized by transformation of the remaining carbonyl group. A mechanistic
Palladium-Catalyzed C-Allylation of Benzoins and an NHC-Catalyzed Three Component Coupling Derived Thereof: Compatibility of NHC- and Pd-Catalysts
作者:Raphaël Lebeuf、Keiichi Hirano、Frank Glorius
DOI:10.1021/ol801644f
日期:2008.10.2
A large range of benzoins was successfully applied as C-nucleophiles in the palladium-catalyzed allylic alkylation with several allyl acetates, resulting in functionalized tertiary homoallylic alcohols. A number of unsymmetrical benzoins can be coupled with high levels of regio- and chemoselectivity. Finally, the challenging compatibility of free N-heterocyclic carbenes with a palladium catalyst has been utilized in a number of metal- and organocatalyzed three-component coupling reactions.