title: Synthesis of pseudodeflectusin and ustusorane C: structural revision of aspergione a and B.
abstract: The syntheses of racemic and optically active pseudodeflectusin and ustusorane C are described. The (1)H- and (13)C-NMR data for our synthetic pseudodeflectusin and ustusorane C were identical to those of the corresponding natural products. We also synthesized the proposed structure of aspergione A and B whose (1)H- and (13)C-NMR data were identical to those of ustusorane C and pseudodeflectusin. The (1)H- and (13)C-NMR spectra of our synthetic aspergione A and B were different from those of the natural compounds. Our results confirm that aspergione A and B are in fact ustusorane C and pseudodeflectusin, respectively.
authors.affiliation: Graduate School of Life and Environmental Science, Kyoto Prefectural University, Kyoto, Japan.
authors.forename: Kouji
authors.initials: K
authors.lastname: Kuramochi
authors.forename: Fumiyo
authors.initials: F
authors.lastname: Saito
authors.forename: Atsuo
authors.initials: A
authors.lastname: Nakazaki
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Takeuchi
authors.forename: Kazunori
authors.initials: K
authors.lastname: Tsubaki
authors.forename: Fumio
authors.initials: F
authors.lastname: Sugawara
authors.forename: Susumu
authors.initials: S
authors.lastname: Kobayashi
mesh_terms: D001578:Benzopyrans / Q000138:chemical synthesis* / Q000737:chemistry*; D002839:Chromans / Q000138:chemical synthesis* / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D012717:Sesquiterpenes / Q000138:chemical synthesis* / Q000737:chemistry*
chemical_list: D001578:Benzopyrans; D002839:Chromans; D012717:Sesquiterpenes; C554193:aspergione A; C554194:aspergione B; C495736:pseudodeflectusin; C554192:ustusorane C