Undergoes lithiation with LDA at low temperatures in the 4-position: Heterocycles, 35, 151 (1993). Formation of the Grignard by Mg exchange with i-PrMgCl: Tetrahdron Lett., 40, 4339 (1999). Transmetallation of the lithiated derivative with ZnCl2 followed by treatment with an electrophile has been described, as a route to 4-substituted 3-bromopyridines: Org. Lett., 3, 835 (2001).