Dihydrobenzopyran skeleton from β-lactams: a stereoselective ring opening–ring closure reaction sequence
作者:Paola Del Buttero、Giorgio Molteni、Antonio Papagni、Tullio Pilati
DOI:10.1016/j.tetasy.2004.11.096
日期:2005.3
Sodium borohydride treatment of the enantiomerically pure tricarbonyl(η6-arene) chromium(0) complexed β-lactam 7 promoted a stereoselective ringopening–ringclosurereaction sequence leading to the novel dihydrobenzopyran derivative 9 in good yield.