Pentacyclic isoxazolines were obtained by the cycloaddition of benzonitrile oxide to norbornene‐azetidinone‐fused 3,1‐oxazines. The constitutions of two of the isomers obtained, and the configurations and conformations of all products, were determined by means of 1H and 13C NMR spectroscopy and DNOE experiments.
- DNOE, regioselectivity
- H and C NMR
- Pentacyclic norbornane/ene‐azetidinone‐fused 3,1‐oxazines, synthesis by cycloaddition
ASJC Scopus subject areas
- Materials Science(all)