Electrophilic ipso substitution
= Electrophilic ipso substitution
An electrophile adds at an aromatic carbon already bearing a substituent; rearomatization can expel that substituent instead of the newly added proton.
= Electrophilic ipso substitution
An electrophile adds at an aromatic carbon already bearing a substituent; rearomatization can expel that substituent instead of the newly added proton.