<i>N</i>-Alkoxyacrylamides as Substrates for Enantioselective Diels−Alder Reactions
作者:Olivier Corminboeuf、Philippe Renaud
DOI:10.1021/ol0257981
日期:2002.5.1
[GRAPHICS]The use of N-alkoxyacrylamides as substrates for Lewis acid catalyzed Diels-Alder reactions has been examined. Enantioselectivities up to 92% ee have been achieved using very simple chiral Lewis acids prepared from triisobutylaluminum and 2,2-dimethyl-alpha,alpha,alpha',alpha'-tetra-1-naphthalenyl-TADDOL (1-NaphtTADDOL). The use of Yamamoto's Zn-BINOL, easily prepared from Et2Zn and 1,1'-bi-2-naphthol (BINOL), proved to be even more efficient, and enantioselectivities up to 96% ee were achieved.