title: N-oxides of some norditerpenoid alkaloids.
abstract: Eight new N-oxides [1-8] of the norditerpenoid alkaloids aconitine, ajacine, delphinine, delphisine, deltaline, heteratisine, lappaconitine, and N-deacetyllappaconitine have been prepared with m-chloroperbenzoic acid. The structures of these compounds were established on the basis of their spectroscopic data (1H, 13C, DEPT, COSY, HETCOR, and selective INEPT nmr experiments). The complete nmr chemical shift assignments for all eight N-oxides are reported. Table 2 shows the differences between the 13C-nmr shifts of the N-oxides compared with those of the parent alkaloids.
authors.affiliation: Institute for Natural Products Research, University of Georgia, Athens 30602-2556, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Bai
authors.forename: H K
authors.initials: HK
authors.lastname: Desai
authors.forename: S W
authors.initials: SW
authors.lastname: Pelletier
mesh_terms: D002723:Chlorobenzoates; D002855:Chromatography, Thin Layer; D004224:Diterpenes / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010087:Oxides
chemical_list: D002723:Chlorobenzoates; D004224:Diterpenes; D010087:Oxides; C036427:3-chlorobenzoic acid