Is this an error? Why is the nitro group reduced as the benzene ring is oxidized? I don't see any possible reducing agents here..
Also, what is the mechanism of aromatic fluorination by xenon difluoride? This appears analogous to electrophilic aromatic substitution in which benzene acts as a nucleophile and attacks an electrophile because of the expected meta-substitution pattern given the presence of the nitro group.
Is fluorine really electrophilic here? How so?