title: Selective demethylation of polymethoxyxanthones with aqueous piperidine.
abstract: Data are presented for selective demethylation of eight polymethoxyxanthones with aqueous piperdine. Clarification and rationalization of the present and previous observations are made. The mechanism is defined in terms of both resonance effects and steric factors.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D003640:Dealkylation; D010880:Piperidines; D014966:Xanthenes
chemical_list: D010880:Piperidines; D014966:Xanthenes