Optimal  condition    was  determined   by  researching   parameters    which  influence   on  obtaining reaction of  N-m-carboxyphenylimide 2,3-dichlorinebicyclo[2.2.1]hept-5-en-2,3-dicarbonic acid. At the result of interaction of m-aminobenzoic acid with dichlorinemalein anhydride, optimal condition was found for synthesis of N-m-carboxyphenylimide of dichlorinemalein acid. Then by this imide optimum condition was researched for optaining reaction of  VI (b). In the found optimum condition output of   IV(b) makes 93.2%