An Efficient Preparation of <i>N</i>-Methyl-α-amino Acids from <i>N</i>-Nosyl-α-amino Acid Phenacyl Esters
作者:Antonella Leggio、Emilia Lucia Belsito、Rosaria De Marco、Angelo Liguori、Francesca Perri、Maria Caterina Viscomi
DOI:10.1021/jo901643f
日期:2010.3.5
In this paper we describe a simple and efficient solution-phase synthesis of N-methyl-N-nosyl-α-amino acids and N-Fmoc-N-methyl-α-amino acids. This represents a very important application in peptidesynthesis to obtain N-methylated peptides in both solution and solidphase. The developed methodology involves the use of N-nosyl-α-amino acids with the carboxyl function protected as a phenacyl ester and