Diastereoselective Conjugate Addition of Cyclic Hydrazine to Optically Active Vinyl Sulfoxide. A Novel Synthesis of Optically Active Azalactams
Optically active (R)-(+)-l,5-diaza-4-phenylbicyclo[4.3.0]nonan-2-one (5) was prepared in high optical purity by diastereoselective conjugate addition of piperidazine to optically active (E)-(S)-1-(...