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 Cs(2)CO(3) in aqueous 1,4-dioxane at 150 degrees C by microwave irradiation.