Lewis Acid Catalyzed Inverse-Electron-Demand Diels−Alder Reaction of Tropones
作者:Pingfan Li、Hisashi Yamamoto
DOI:10.1021/ja908127f
日期:2009.11.25
Lewisacidcatalyzed inverse-electron-demand Diels-Alderreaction of tropone derivatives was developed. Up to 97% ee was obtained for the chiral dinucleus BINOL-aluminum complex catalyzedreaction between tropones and ketene diethyl acetal to give bicyclo[3.2.2] ring structures, which opens up a unique way of making chiral seven-membered rings.