A palldium(0)-catalyzed tandem cyclization/Suzuki coupling reaction of various 1,6-enyne substrates was developed. This Pd-catalyzed enyne cyclization reaction represents a new process for the synthesis of stereodefined α-arylmethylene-γ-butyrolactones, lactams, multifunctional tetrahydrofurans, pyrrolidines, and cyclopentanes. The mechanism of the reaction was studied by the employment of different
Palladium-Catalyzed Tandem Cyclization/Suzuki Coupling of 1,6-Enynes
作者:Gangguo Zhu、Zhaoguo Zhang
DOI:10.1021/ol035304f
日期:2003.10.1
[reaction: see text] A Pd(0)-catalyzed 1,6-enyne cyclization-arylation cascade reaction was effected via pi-allylpalladium intermediate formation and subsequent Suzuki coupling to give cyclic products with stereodefined exocyclic double bonds.
Palladium-catalyzed reactions of acetoxyenynes with triorganoindium reagents
作者:John T. Metza、Raffi A. Terzian、Thomas Minehan
DOI:10.1016/j.tetlet.2006.10.043
日期:2006.12
reaction of 1-acetoxy-2,7- and 2,8-enynes with triorganoindium reagents in the presence of 5 mol % palladium catalyst provides cyclic and/or acyclic substitution products depending uponsubstrate structure. Enynes bearing secondary acetates, quaternary centers, or heteroatoms furnish high yields of carbocyclic or heterocyclic substitution products. NMR studies show that a single trisubstituted alkene