Tri(o-tolyl)phosphine for highly efficient Suzuki coupling of propargylic carbonates with boronic acids

A highly efficient catalytic system consisting of Pd-2(dba)(3)center dot CHCl3 and tri(o-tolyl)phosphine has been identified for the coupling of propargylic carbonates with different types of organo boronic acids at room temperature. Excellent central-to-axial chirality transfer was also demonstrated.