Question

Fc reaction on aniline does not undergo friedel-crafts

Answer 1

what do you mean to say

Answer 2

the friedel-crafts reaction is carried out in the presence of lewis acid such as agcl3. aniline being basic  in nature react with agcl3 and form salt . due to the positive charge on nitrogen electrophillic subsitution reaction on benzene ring deactivated. hence aniline does not under go friedel craft reaction.