These evidences have encouraged several research groups to
study the synthesis and biological properties of new psoralen derivatives,
including benzopsoralens [12e15]. These compounds were
found to be effective in inhibiting the in vitro growth of different
human tumor cell lines [16,17]. The synthesis of compounds, containing
an ester group in the position 3 of the pyranone ring such as
ethyl 3-oxo-3H-benzofuro[3,2-f]-1-benzopyran-2-carboxylate has
also been described [18]. The angular compounds ethyl 3-oxo-3Hbenzofuro[
3,2-f]-1-benzopyran-2-carboxylate and ethyl 2-oxo-2Hbenzofuro[
2,3-h]-1-benzopyran-3-carboxylate showed the most
promising results on tumor cell lines [19], being the former the most active. Thus, in the current work this compound was hydrolyzed to
the corresponding acid and its amide analogues were prepared, as
well as the derivative unsubstituted inposition3 of the pyrone ring, to
evaluate the effect of the structure variation on their biological
activity. These results were complemented with molecular docking
studies with human-CYS2A6 enzymes to evaluate the analogues
potential to interact with the heme group of the enzymes.