The preparation of a stable 2-pyridylboronate and its reactivity in the Suzuki–Miyaura cross-coupling reaction

The preparation and reactivity of a 2-pyridylboronate stabilised by N-phenyldiethanolamine is described. In Suzuki–Miyaura cross-coupling reactions employing this boronate, significant aryl–aryl exchange from the phosphine ligand was observed with some combinations of ligand and substrates. The amount of the exchange by-product can be minimised by appropriate choice of phosphine ligand.