Pd(0)-catalyzed cross-coupling of allyl halides with α-diazocarbonyl compounds or N-mesylhydrazones: synthesis of 1,3-diene compounds
作者:Kang Wang、Shufeng Chen、Hang Zhang、Shuai Xu、Fei Ye、Yan Zhang、Jianbo Wang
DOI:10.1039/c6ob00454g
日期:——
With palladiumcatalysis, allyl bromides or chlorides react with α-diazocarbonyl compounds or N-mesylhydrazones to afford 1,3-diene derivatives. The reaction represents a novel and efficient method for the synthesis of 1,3-butadiene derivatives. Mechanistically, the reaction is proposed to follow a pathway involving the formation of a π-allylic palladium carbene complex and subsequent migratory insertion
Palladium-catalyzed reaction of allyl halides with α-diazocarbonyl compounds
作者:Shufeng Chen、Jianbo Wang
DOI:10.1039/b806970k
日期:——
The Pd(OAc)(2)-catalyzed reaction between alpha-diazocarbonyl compounds and allyl bromides or chlorides leads to the formation of 1,3-diene derivatives.
Alkynes as Stille Reaction Pseudohalides: Gold- and Palladium-Cocatalyzed Synthesis of Tri- and Tetra-Substituted Olefins
作者:Yili Shi、Sonja M. Peterson、Walter W. Haberaecker、Suzanne A. Blum
DOI:10.1021/ja710648b
日期:2008.2.1
A Stille-type reaction that employs alkynes as pseudohalides provides access to the catalytic chemistry of palladium-carbon sigma-bonds starting from pi-systems. The synthesis of a variety of tri- and tetra-substituted olefins by addition of sp(2)- and sp-hybridized stannanes across mono- and diester alkynes was accomplished with complete regioselectivity and high stereoselectivity. The reaction is proposed to proceed via a bimetallic mechanism where the Lewis acidic Au(I) activates the alkyne toward oxidative addition across Pd(0).