New and simple one-step cobalt-catalyzed preparation of functionalized arylstannanes from the corresponding aryl bromides or iodides

The process for the preparation of functionalized arylstannanes from the corresponding aryl bromides or iodides was described. The corresponding arylstannane was detected by gas chromatography using an internal standard alkane. The two-step coupling reaction of aryl bromides and tributylstannyl chloride led to corresponding arylstannanes at room temperature without further addition of a catalysts. It was observed that the Stille coupling of aromatic rings required the formation of arylstannanes. The results show that this method gives the expected arylstannate in good excellent yields.