Tandem Pd(II)-Catalyzed Vinyl Ether Exchange−Claisen Rearrangement as a Facile Approach to γ,δ-Unsaturated Aldehydes
作者:Xudong Wei、Jon C. Lorenz、Suresh Kapadia、Anjan Saha、Nizar Haddad、Carl A. Busacca、Chris H. Senanayake
DOI:10.1021/jo062548f
日期:2007.5.1
A sequential allyl vinyl ether formation−Claisen rearrangement process catalyzed by a palladium(II)−phenanthroline complex is reported. The effects of allylic alcohol structure, type of vinylating agent, and palladium catalysts are discussed. This method provides a convenient approach to γ,δ-unsaturated aldehydes under mild conditions that avoid the use of toxic Hg(II) catalysts. The new methodology