作者:Rosario Ramón、Mònica Alonso、Antoni Riera
DOI:10.1016/j.tetasy.2007.10.041
日期:2007.11
Enantioselective syntheses of two mesityl (2,4,6-trimethylphenyl) amino acids are described. Starting from ethyl 3-mesityl-2-propenoate both enantiomeric dihydroxy esters 5 were prepared in excellent yield and enantiomeric purity (>99% ee) by Sharpless dihydroxylation. Each diol was converted into ethyl 3-azido-2-hydroxy-3-mesitylpropanoate 3 which is the common intermediate. Compound (2S,3S)-3 was transformed into Fmoc-D-mesitylglycine D-1 and Fmoc-L-mesitylalanine L-2 through two four-step-sequences. (c) 2007 Elsevier Ltd. All rights reserved.