How to remove fluorine from 2-[2-(3-bromophenyl)ethenyl]-5-fluoro-1,3-benzoxazole?
How to remove fluorine from this compound?


There's no need to try that!

Just use  the commercially available 2-methyl-1,3-benzoxazole and try to react it with 3-bromobenzaldehyde in N,N-dimethylformamide under reflux for 2-4 h using self-prepared $\ce{KF-Al2O3}$ as a catalyst.

The reaction has been described (DOI) for several benzaldehydes, such as $\ce{4-H, 4-Cl, 4-Me, 4-OCH3, 4-N(CH3)2}$, with yields > 80%.