Regio- and Stereoselective Nickel-Catalyzed Coupling of Boronic Acids with Allenoates

Abstract

The Ni(II)-catalyzed cross-coupling of arylboronic acids with allenoates is documented. The high regio- and stereoselectivity of the process enables a wide range of β-aryl β,γ-unsaturated esters to be prepared in good to excellent yields (up to 95%) and high E/Z-selectivity. Additionally, [3+2]-cascade sequence was observed when 2-formylphenylboronic acid was employed.