Synthesis and Anti- Biological Evaluation of Novel 2-Nitropyrrole Derivatives.

Human American trypanosomiasis, called Chagas disease, caused by protozoan infection, represents a major public health problem, with about 7000 annual deaths in Latin America. As part of the search for new and safe anti- derivatives involving nitroheterocycles, we report herein the synthesis of ten 1-substituted 2-nitropyrrole compounds and their biological evaluation. After an optimization phase, a convergent synthesis methodology was used to obtain these new final compounds in two steps from the 2-nitropyrrole starting product. All the designed derivatives follow Lipinski's rule of five. The cytotoxicity evaluation on CHO cells showed no significant cytotoxicity, except for compound (CC = 24.3 µM). Compound appeared to show activity against intracellular amastigotes form (EC = 3.6 ± 1.8 µM) and good selectivity over the vero host cells. Unfortunately, this compound showed an insufficient maximum effect compared to the reference drug (nifurtimox). Whether longer duration treatments may eliminate all parasites remains to be explored.