New Chlorine-Containing Depsidones From Lichens

Abstract

The depsidones, 3-O-demethylscensidin (2,7-dichloro-3-hydroxy-8-methoxy-1,6-dimethyl-11H-dibenzo[ b,e ][1,4]dioxepin-11-one)(5), O- methyldiploicin (2,4,7,9-tetrachloro-3,8-dimethoxy-1,6-dimethyl-11 H- dibenzo [ b,e ][1,4]dioxepin-11-one (6) and O- methylvicanicin (2,7-dichloro-3,8-dimethoxy-1,4,6,9-tetramethyl-11H-dibenzo[ b,e ][1,4]dioxepin-11-one) (13) have been detected in lichens for the first time and the structures of these metabolites have been established by comparison with synthetic material.