I have looked through articles and closest I feel is in this question there will be a nucleophilic aromatic substitution. Now, a lot of questions are available where there is a halogen and OMe group substitutes the halogen.
My take on this is maybe due to SIR effect (steric inhibition of resonance) The NO2 group present in between the two methyl groups would be substituted by OMe? Will this be the approach?