Optically active nitroxyl radicals are prepared from enantiomerically
pure bicyclic terpenoids. (-)-Camphoxyl radical (-)-4 derived from com
mercially available oxazolidinone (-)-1 and (+)-camphoxyl radical (+)-
4 derived from (-)-camphene are readily prepared, conformationally rig
id, enantiomeric nitroxyl radicals. (-)-Camphorsulphonic acid is used
to prepare two additional optically active nitroxyl radicals 9 and 12.
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