Compounds of Formulas I and II wherein A is ???CR???CR???CR???N??? or B is ???C(R)2???C(R)2???C(R)2???NR??? and R, R1 and R2 are as defined above can be prepared according to Reaction Scheme III. In step (1) of Reaction Scheme III a 3-nitro[1,5]naphthyridin-4-ol of Formula XXIX is chlorinated using a suitable chlorinating agent such as phosphorus oxychloride to provide a 4-chloro-3-nitro[1,5]napht