Journal of Organic Chemistry p. 589 - 594 (1992)
Update date:2022-08-04
Topics:
Saa, Jose M.
Marti, Catalina
Garcia-Raso, Angel
A novel synthetic approach toward 4-formyl-7-hydroxyindoles and 4,7-indoloquinones is described.Basically, two major operations need to be carried out, namely: (1) ozonization of the appropriately protected 4-amino-5-hydroxyindenes leading eventually to 4-formyl-7-hydroxyindoles and (2) Fremy's salt promoted oxidative degradation of the later compounds to the desired 4,7-indoloquinones.A formal synthesis of PDE I and PDE II has been achieved.
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