Controlling the Regiochemistry of Zirconocene-Catalyzed Hydrosilation of Styrenes. Selective Preparation of Markovnikov and Anti-Markovnikov Addition Products Using the Same Combination of Procatalyst
The catalytic system of Cp2ZrCl2 and n-BuLi(3 equiv with respect to Zr) promotes hydrosilation ofstyrene derivatives in the Markovnikov addition manner,which is the reverse regioselectivity compared to that forZr-catalyzed olefin hydrosilation with the standardprotocol (Zr/n-BuLi = 1/2).