title: First synthesis of methylated hypocrellin and its fluorescent excited state: a cautionary tale.
abstract: Methylated hypocrellins were obtained and characterized by satisfactory 1HNMR, UV-vis, IR, and mass data, and their absorption and fluorescence emission spectra were studied. A previous report of methylated hypocrellin (J. Phys. Chem. A 1999, 103, 7949) appears to be in error.
authors.affiliation: Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China.
authors.forename: Shangjie
authors.initials: S
authors.lastname: Xu
authors.forename: Shen
authors.initials: S
authors.lastname: Chen
authors.forename: Manhua
authors.initials: M
authors.lastname: Zhang
authors.forename: Tao
authors.initials: T
authors.lastname: Shen
mesh_terms: D013058:Mass Spectrometry; D008697:Methane / Q000031:analogs & derivatives / Q000737:chemistry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010569:Perylene / Q000031:analogs & derivatives* / Q000138:chemical synthesis*; D019800:Phenol; D011809:Quinones / Q000138:chemical synthesis*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet
chemical_list: D011809:Quinones; D019800:Phenol; D010569:Perylene; D008697:Methane; C048388:hypocrellin A; C064522:hypocrellin B