5-Bromo-2-pyridylzinc reagent; direct preparation and its coupling reactions

A facile synthetic route to the direct preparation of 5-bromo-2-pyridylzinc iodide has been developed. Treatment of 5-bromo-2-iodopyridine with active zinc gave rise to the selective oxidative addition to C–I bond under mild conditions. The resulting organozinc iodide has been used in the variety of coupling reactions affording the corresponding cross-coupling product.