Abstract
Abstract While investigating the ring opening-closure process of the C ring of catharanthine (2), a new type of dimer (5) and two rearranged “monomeric” compounds (3,4) have been obtained. In the course of the coupling process of the rearranged iboga-skeleton monomer (3) with vindoline (6) in the presence of ferric chloride in aqueous media three dimer compounds (7,8 and 9) have been produced.
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