Synthesis of Cyclic Alkenylborates via Silaboration of Alkynes Followed by Hydrolysis for Utilization in External-Base-Free Cross Coupling

Cyclic alkenylborates have been synthesized regioselectively via a palladium-catalyzed regioselective silaboration of terminal alkynes with ClMe2Si-B(pin) followed by basic hydrolysis. The cyclic borates undergo cross coupling with 4-iodoanisole in the absence of an external base.