The natural product, 1,7-dimethoxy-2-hydroxyxanthone (1), isolated from Securidaca inappendiculate
Hassk, has a potential in the treatment of erectile dysfunction due to its significant relaxation activity on
rabbit Corpus cavernosum. However, the isolation of compound 1 is problematic because of its high
similarity in structure to its analogs. In this paper, the first synthesis of 1 was reported featuring two key
reactions: a copper-catalyzed coupling reaction and an intramolecular cyclization