Unprecedented Cesium and Potassium Fluorides Catalyzed Trialkylsilylation and Tributylstannylation of Terminal Alkynes with Trifluoromethyl-Trialkylsilanes and -Tributylstannane

Cesium and potassium fluorides promoted trialkylsilylation and tributylstannylation of terminal alkynes with trifluoromethyl-trialkylsilanes and -tributylstannane were found to give 1-silyl- and 1-tributylatannyl-alkynes in high yield. The present reactions are applicable to 1-alkynes having a wide range of functional groups such as acetal, iodo, silyl, amino, amido and carbonyl (except for aldehyde) groups.