Stereoselective synthesis of a new enantiopure tricyclic β-lactam derivative via a tricarbonyl(η6-arene)chromium(0) complex
作者:Paola Del Buttero、Clara Baldoli、Giorgio Molteni、Tullio Pilati
DOI:10.1016/s0957-4166(00)00137-3
日期:2000.5
tricyclic β-lactam 5 has been synthesized both in racemic and enantiopure form starting from the enantiomericallypuretricarbonylchromium(0) complex 1. The synthetic sequence involves the stereoselective [2+2] cycloaddition of 1 with acetoxyacetylketene, followed by intramolecular aromatic nucleophilic substitution of the fluorine atom. Mechanistic pathways leading to 5 are discussed.