| abstract |
A process for preparing N-substituted amino acid esters having the formula (I):n , wherein R, and R 4 , are the same or different, are an alkyl, aralkyl, cycloalkyl or aryl group; and R 2 and R 3 , are the same or different, are an alkyl, aralkyl, aryl, heterocycle-alkyl, aminoalkyl or guanidylalkyl, by the reaction of a-amino acid esters with a-substituted carboxylic acid esters, under conditions substantially free from solvent. |