2,2-Bis[4-(4-nitrophenoxy)phenyl]hexafluoropropane (CAS# 69563-87-7) is a useful building block synthesized under ultrasonic activation. 2,2-Bis[4-(4-nitrophenoxy)phenyl]hexafluoropropane is an intermediate in the synthesis of soluble sulfonated naphthalenic polyimides as materials for proton exchange membranes.