• Multifunctional boronic acid, developed by Sutherland and Gallagher, with potential for substitution at the 2-, 3- or 5-positions, e.g in the synthesis of unsymmetrically 3,5-disubstituted 2-fluoropyridines and 2-pyridones: J. Org. Chem., 68, 3352 (2003). The authors' review on the synthesis and reactivity of halopyridylboronic acids is available from Alfa Aesar on request.