Biochemical Studies on Bakanae Fungus. Part 57

Chemical Struture of Gibberellins. Part XXII

Abstract

On the catalytic hydrogenation of gibberellin A₃, the lactone ring was hydrogenized accompanying the double bond migration to C-10-C-11. The structures of two hydrogenolysis products thus obtained are discussed along with their acid-catalyzed relactonization. Subsequent dehydration of secondary hydroxyl groups at C-2 of these products gave unexpected aromatized compounds, the structures of which are also discussed.