Improved synthetic access to the β,γ-enol ether amino acids, L-2-amino-4-methoxy-trans-but-3-enoic acid and l-2-amino-4-methoxy--but-3-enoic acid
作者:Vitauts Alks、Janice R. Sufrin
DOI:10.1016/s0040-4039(00)98044-4
日期:1990.1
to L-2-amino-4-methoxy--but-3-enoic acid, exclusive of the - isomer, has been developed. The key step is direct formation of a -enol etherderivative from the corresponding dimethylacetal, by refluxing in CCl4, in the presence of hexamethyldisilazane and Me3SiI. The isomeric L- amino acid could be accessed from this route by isomerizing the intermediate, methyl DL-2-acetamido-2-amino-4-methoxy--but-3-enoate