Efficient Regioselective Preparationof Monobromo and Bromoiodo Hydroxy Pyridines from Dibromoderivativesvia Bromine-Lithium Exchange - Meana, Ángela; Rodríguez, Justo F; Sanz-Tejedor, Mª Ascensión; García-Ruano, José L (Synlett, 2003)