Electrophilic Rearrangements of Chiral Amides: A Traceless Asymmetric α-Allylation
摘要:
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.
Electrophilic Rearrangements of Chiral Amides: A Traceless Asymmetric α-Allylation
摘要:
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.
Electrophilic Rearrangements of Chiral Amides: A Traceless Asymmetric α-Allylation
作者:Bo Peng、Danny Geerdink、Nuno Maulide
DOI:10.1021/ja408856p
日期:2013.10.9
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.