Preparation of Potassium Alkynylaryltrifluoroborates from Haloaryltrifluoroborates via Sonogashira Coupling Reaction

A novel series of alkyne-containing potassium organotrifluoroborates were prepared in good yields from the corresponding haloaryltrifluoroborates and various alkynes via Sonogashira coupling reaction. Also, the Suzuki-Miyaura cross-coupling reaction of alkynylaryltrifluoroborates with aryl and alkenyl bromides was achieved in the presence of 5 mol % of Pd(TPP)(4) and 3.0 equiv of Cs2CO3 in aqueous 1,4-dioxane at 150 degrees C by microwave irradiation.