摘要:
Optically active camphoxyl nitroxides derived from camphene react with prochiral carbon radicals to give diastereomeric coupling products. The diastereomeric ratio can be conveniently measured by H-1-NMR spectroscopy, in contrast to previous work employing steroidal nitroxides. The structure of the camphoxyl radical was modified; all couplings resulted in modest diastereoselectivity. (C) 1997 Elsevier Science Ltd.