In present study, a series of new 2-(1, 3, 4-oxadiazol-2-ylthio)-1-phenylethanone derivatives (6a–6x) as potential focal adhesion kinase (FAK) inhibitors were synthesized. The bioassay assays demonstrated that compound 6i showed the most potent activity, which inhibited the growth of MCF-7 and A431 cell lines with IC50 values of 140±10nM and 10±1nM, respectively. Compound 6i also exhibited significant FAK inhibitory activity (IC50= 20± ...