Internal and terminal alkynes undergo rapid platinum (0)-catalyzed diboration with bis (pinacolato) diboron in dioxane to yield cis-1, 2-bis (boryl) alkenes under sealed vessel microwave conditions. Subsequent addition of aryl bromides, base and a palladium catalyst to the reaction vial followed by resubjection to microwave conditions provides tetrasubstituted ethylenes in high yields via Suzuki cross-coupling of the boron ...
