title: Photodimerization of 4,6,4'-trimethylangelicin and 6,5-dimethylangelicin.
abstract: 4,6,4'-Trimethylangelicin and 6,5'-dimethylangelicin form C4-cyclodimers when irradiated in water-ethanol solution. The former compound yields a pyrone-pyrone dimer similar to that formed by psoralens. 6,5'-Dimethylangelicin forms both pyrone-pyrone and pyrone-furan dimers; this unusual dimer has the cis-syn configuration.
authors.affiliation: Department of Pharmaceutical Sciences, University, Padova, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Caffieri
authors.forename: G M
authors.initials: GM
authors.lastname: Beijersbergen van Henegouwen
authors.forename: C
authors.initials: C
authors.lastname: Erkelens
authors.forename: C
authors.initials: C
authors.lastname: de Bruijn
authors.forename: F
authors.initials: F
authors.lastname: Dall'Acqua
mesh_terms: D011564:Furocoumarins / Q000528:radiation effects*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008958:Models, Molecular; D008968:Molecular Conformation; D015394:Molecular Structure; D010777:Photochemistry; D013056:Spectrophotometry, Ultraviolet; D014466:Ultraviolet Rays
chemical_list: D011564:Furocoumarins; C059518:6,5'-dimethylangelicin; C041621:4,4',6-trimethylangelicin