A novel chloropalladation-initiated intermolecular oxyvinylcyclization of alkenes with alkynoic acids or alkynols is developed. This protocol provides a series of 3-methylene γ-lactone and tetrahydrofuran derivatives in moderate to excellent yields with high stereoselectivities in the presence of PdCl2 and CuCl2 or CuCl2·2H2O. Besides a broad substrate scope, this method has the advantages of mild
Three in one: A highly efficient and mild PdII‐catalyzed carboesterification of alkenes with carboxylic alkyne derivatives proceeds through a domino‐type alkyne–alkene coupling/CO‐bond formation (see scheme). The stereoselectivity is controlled by the choice of substrates and temperature. The reaction provides a convenient method for the construction of naturally occurring biologically active compounds
A practical and green NHC-palladium-catalyzed cascade annulation of alkynoicacids with unactivated alkenes under an oxygen atmosphere in ionic liquid for the assembly of structurally diverse alkyl substituted α-methylene-γ-lactones is accomplished. In the presence of 0.5 mol% of IPr−Pd−Py−Cl2 in [Amim]Cl, both the alkynoicacids and unactivated alkenes were well tolerated, thus giving the desired