Chlorotrimethylsilane Mediated Formation of ω-Allyl Esters of Aspartic And Glutamic Acids

Abstract The protection of the ω-carboxylic function of aspartic and glutamic acids by an allyl ester is advantageous because of its orthogonality with most protecting groups and its compatibility with a number of reagents. In this communication we describe a simple method using chlorotrimethylsilane in the presence of allyl alcohol which gives exclusively the ω-allyl esters of both aspartic and glutamic acids in excellent yield.