Co-catalysis over a tri-functional ligand modified Pd-catalyst for hydroxycarbonylation of terminal alkynes towards α,β-unsaturated carboxylic acids

Abstract

An amphiphilic tri-functional ligand (<bold>L1</bold>) containing a phosphonium cation, a phosphino-fragment and a hydrophilic sulfonate anion enabled Pd(OAc)₂ to co-catalyze hydroxycarbonylation of terminal alkynes towards α,β-unsaturated carboxylic acids.