Generally compounds of Formula 1a, which are compounds of Formula 1, wherein G1 is group represented by Formula a, can be prepared from 5-halo-benzofuran-2-carboxylate, wherein R is a lower alkyl, such as methyl, and Hal is a halide such as a bromo or iodo group. with the appropriate boronic acid in the presence of a catalyst preferably tetrakis-triphenylphosphine-palladium and a base such as sodi