er; and esters such as ethyl acetate), followed by reacting at ???10 to 75 ??? C. for 0.5 to 10 hours with stirring and post-treatment in accordance with a conventional method to obtain a bishaloimide compound shown by the following general formula [20]. [wherein Y is a halogen atom (e.g. afluorine atom, a chlorine atom, a bromine atom and an iodine atom); A3 is the same as described above].