Palladium-catalyzed cross-coupling reactions of organogold(i) phosphanes with allylic electrophiles
作者:Miguel Peña-López、Miguel Ayán-Varela、Luis A. Sarandeses、José Pérez Sestelo
DOI:10.1039/c2ob06788a
日期:——
as cinnamyl and geranyl halides (bromide, chloride and acetates) under palladium catalysis in THF at 80 °C to afford the α-substitution product with moderate to high yields. When the reaction is performed with a chiral enantiopure secondary acetate, the α-substituted cross-coupling product is obtained with complete inversion of the stereochemistry.
visible-light-induced photoredox/nickel dualcatalysis. The mild reaction conditions allow good compatibility of both vinyl triflates and allylic carbonates. Notably, the stereoselectivity of this synergistic cross-electrophile coupling can be tuned by an appropriate photocatalyst with a suitable triplet-state energy, providing a practical and stereodivergent means to alkene synthesis. Preliminary mechanistic
Organogold(I) Phosphanes in Palladium-Catalyzed Cross-Coupling Reactions in Aqueous Media
作者:Miguel Peña-López、Luis A. Sarandeses、José Pérez Sestelo
DOI:10.1002/ejoc.201201720
日期:2013.5
Cross-coupling reaction of organogold(I) phosphanes with organic electrophiles in aqueousmedia has been investigated. Reactions between isolated aryl-, alkenyl-, or alkynylgold(I) phosphanes and aryl halides or triflates, alkenyl halides, and allyl acetates proceed under palladium catalysis conditions at room temperature or 80 °C in water with THF as a co-solvent. The couplingreactions give good yields