Mazindol was synthesized by four steps from chlorobenzene and phthalic anhydride in an overall yield of 23.4%.

以邻二甲酸起始料，经四步工合成马吲哚，总收率23．4％。

Amino phthalhydrazide was synthesized from phthalic anhydride by four steps of nitrationidehydration, hydrazinolysis and reduction reactions in this paper.

以邻二甲酸料,经硝化、脱水、肼化、还等步骤合成了3-氨基邻二甲酰肼。