Application of the Ester Enolate Claisen Rearrangement in the Synthesis of Amino Acids Containing Quaternary Carbon Centers
作者:Uli Kazmaier
DOI:10.1021/jo960014g
日期:1996.1.1
Ester enolateClaisenrearrangement of highly substituted aminoacid allylic esters 4 allows for the synthesis of sterically demanding aminoacids 5 with beta-quaternary carbon centers. Because of enolate fixation by chelation, the rearrangement occurs in a highly diastereoselective fashion. The methodology is suitable not only for glycine derivatives but also for allylic esters of various amino acids