Heterogeneous Au and Rh Catalysts for Cycloisomerization Reactions of [Gamma]-Acetylenic Carboxylic Acids (Report‪)‬

INTRODUCTION Addition of hydrogen-heteroatom nucleophiles across the C-C triple bond of an alkyne function represents a major entry to heteroatom-substituted alkenes and as such has been the subject of a large variety of investigations. Among other methodologies, transition-metal-catalyzed processes have attracted constant interest due to their superior ability to control the stereoselectivity of the addition process [1].