2-Bromo-4-nitroaniline is used as a reagent in the synthesis of novel tetrahydrothienopyridopyrimidine derivatives which exhibit antibacterial and antifungal activity against a variety of microorganisms in vitro. Also used as a reagent in synthesis of dialkylimidazole inhibitors of Trypanosoma cruzi sterol 14α-demethylase as anti-Chagas disease agents.