화학공학소재연구정보센터
Journal of the American Chemical Society, Vol.135, No.40, 14968-14971, 2013
Electrophilic Rearrangements of Chiral Amides: A Traceless Asymmetric alpha-Allylation
A one-pot protocol for the asymmetric alpha-allylation reaction is reported relying on a key efficient asymmetric Claisen rearrangement, triggered by electrophilic activation of chiral pseudoephedrine amides. Subsequent reduction or hydrolysis of the resulting iminium ions provides highly enantioenriched alpha-allylic aldehydes or carboxylic acids in a traceless manner. Compared to traditional alternatives which make use of strongly basic conditions, the work presented herein displays unprecedented functional group tolerance.