title: Formation and structure elucidation of two novel spiro[2H-indol]-3(1H)-ones.
abstract: The molecular structures of two byproducts 1,1''-diphenyl-3',4'-dihydrodispiro[indole-2,2'-furan-5',2''-indole]-3,3''(1H, 1''H)-dione (3) and 1,5'-diphenyl-4',5'-dihydro-3'H-spiro[indole-2,2'-pyrano[3,2-b]indol]-3(1H)-one (4), which accompanied the rearrangement of 3-hydroxy-3-methyl-1-phenylquinoline-2,4(1H,3H)-dione (1) to 2-hydroxy-2-methyl-1-phenyl-1,2-dihydro-3H-indol-3-one (2), have been elucidated by NMR, MS, and X-ray diffraction.
authors.affiliation: Faculty of Chemistry and Chemical Technology, University of Ljubljana, SI-1000 Ljubljana, Slovenia. janez.kosmrlj@fkkt.uni-lj.si
authors.forename: Janez
authors.initials: J
authors.lastname: Kosmrlj
authors.forename: Stanislav
authors.initials: S
authors.lastname: Kafka
authors.forename: Ivan
authors.initials: I
authors.lastname: Leban
authors.forename: Marjeta
authors.initials: M
authors.lastname: Grad
mesh_terms: D007211:Indoles / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008958:Models, Molecular; D015394:Molecular Structure; D011804:Quinolines / Q000737:chemistry; D013141:Spiro Compounds / Q000737:chemistry*; D013329:Structure-Activity Relationship; D014961:X-Ray Diffraction
chemical_list: D007211:Indoles; D007659:Ketones; D011804:Quinolines; D013141:Spiro Compounds