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

以氯和邻二甲酸酐为料，经四工序成马吲哚，总收率为23．4％。

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

以邻二甲酸酐为料,经硝化、脱水、肼化、还等成了3-氨基邻二甲酰肼。

In this paper, the synthesis of 2 - chloranthraquinone and 2 - aminoanthraquinone was studied.It was prepared from phthalic anhydride by acetyiation, hydrolysis and cyclization.

以酐和取代为料,经过乙酰化、水解及环反应,成了2-氯蒽醌和2-氨基蒽醌,并对影响收率的工艺条件进行了研究。