View all references Widlanski designed and synthesized 4-(fluoromethyl)phenyl phosphate, which is likely to function as a mechanism-based phosphotyrosine phosphatase inactivator. 4-(Fluoromethyl)phenyl phosphate undergoes a phosphatase-catalyzed hydrolytic reaction to give a reactive intermediate quinone methide that could irreversibly inactivate the phosphatase by forming a covalent bond to an active site residue (ie, OH, SH, and NH 2 groups) shown ...