Synthesis of α-Amino Acids by Umpolung of Weinreb Amide Enolates
作者:Sebastian Hirner、Donata K. Kirchner、Peter Somfai
DOI:10.1002/ejoc.200800683
日期:2008.11
An efficient and diastereoselective synthesis of alpha-amino acids from readily available starting materials has been developed. The key feature of this reaction is an umpolung of a glycine-derived ...
Synthesis of α-Amino Amides via <i>N</i>,<i>O</i>-Acetals Derived from Weinreb Amides
作者:Sebastian Hirner、Peter Somfai
DOI:10.1021/jo9015166
日期:2009.10.16
An easy and straightforward synthesis of α-amino amidesvia a base-mediated rearrangement of modified Weinreb amides into N,O-acetals is presented. Subsequent arylation, alkylation, alkenylation, or alkynylation of this intermediate affords the corresponding α-amino amides in excellent yields. Furthermore, a more generalized protocol for the α-arylation of Weinreb amides lacking an α-amino moiety is