A Chiral Acrylate Equivalent for Metal-Free Diels−Alder Reactions: <i>endo</i>-2-Acryloylisoborneol
作者:Claudio Palomo、Mikel Oiarbide、Jesús M. García、Alberto González、Ainara Lecumberri、Anthony Linden
DOI:10.1021/ja025906e
日期:2002.9.1
The principle of metal-free activation of enones toward the Diels-Alderreaction with dienes is demonstrated by exploiting the capability of Brønsted acids to activate alpha'-hydroxyenones through hydrogen bonding. The diastereoselective application of such a principle is nicely realized by using a newly designed family of camphor-based chiral enones, which upon catalytic action of either trifluoroacetic