Syntheses of new difluoromethylene benzoxazole and 1,2,4-oxadiazole derivatives, as potent non-nucleoside HIV-1 reverse transcriptase inhibitors

In an effort to prepare new fluorine-containing compounds, which are active against HIV, several chemical modifications of a series of benzoxazole and 1,2,4-oxadiazole-CF2CHOHAr derivatives were carried out. The products (9–30) which all have one or two CF2 groups were tested for activity against HIV-1; they were devoid of significant activity, one of them being cytotoxic.