Method of synthesis of the partial vincamine and the indole alkaloids apparent

摘要

The invention relates to a method of synthesis of the partial vincamine and the indole alkaloids visible, starting from the vincadifformine and tabersonine and comprising a reaction that - latter with the oxygen which is active in situ in the state of singlet excites, photochemically in the presence of a sensitizer and of a reducing agent, and then treatment with an acid and separation of the final and or by crystallization or chromatography.