title: Trapping of the putative cationic intermediate in the Morin rearrangement with carbon nucleophiles.
abstract: This paper presents reactions in which the putative cationic intermediate in the Morin rearrangement is trapped by aromatic carbon nucleophiles (indoles and furans). For example, reaction of sulfoxide 27 with trifluoroacetic acid in chloroform provides, among other products, indole 29 and indoline 30. The indoline was shown to be in equilibrium with the nine-membered ring bridged indole 31. Other examples of Morin rearrangement-trapping reactions are presented, and mechanisms for these transformations are proposed.
authors: Department of Chemistry, Ohio State University, 100 W. 18th Avenue, Columbus, Ohio 43210, USA.
authors: J D
authors: JD
authors: Freed
authors: D J
authors: DJ
authors: Hart
authors: N A
authors: NA
authors: Magomedov
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002412:Cations; D005663:Furans / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D002412:Cations; D005663:Furans; D007211:Indoles; D002244:Carbon