Synthesis of a Number of Unsymmetrical Bridged Terphthaloyl Acetophenone Oxime Esters

A number of unsymmetrical bridged terphthaloyl acetophenone oxime esters has been synthesized throughout an esterification reaction between four different acetophenone oximes and the terphthaloyl chloride in a molar ratio of (2:1) under mild basic conditions. Spectroscopic techniques, such as IR, HNMR and mass spectrometer, were used to confirm the structures of the targeted oxime esters. The yields of the obtained oxime esters ranged from 80% to 95%.