Stereoselective synthesis of N-phenylsulfonyl substituted spiro-β-lactams
作者:Piero Dalla Croce、Concetta La Rosa
DOI:10.1016/s0957-4166(99)00096-8
日期:1999.3
A stereoselective synthesis of N-phenylsulfonyl substituted spiro-β-lactams obtained from the N-(phenylmethylene)benzenesulfonamide and the ketene valence tautomer of the bicyclic mesoionic compounds derived from 4-hydroxy substituted N-acyl-l-prolines in the presence of acetic anhydride as the dehydratingagent is presented. The reaction of (2S,4R)-4-acetyloxy or benzoyloxy-N-acyl-proline with the