The present invention relates to a novel process for the esterification of N-acylated amino acids which contain an acid-labile keto protective group under alkaline conditions without using a polar aprotic solvent, in which the N-acylated amino acid with acid-labile keto protective group prepared in situ is esterified using an alkyl halide or a mono- or dialkyl ester of sulfuric acid.
本发明涉及一种新颖的过程,用于在碱性条件下无需使用极性非质子溶剂,对含有酸敏感的酮保护基的N-酰化
氨基酸进行酯化,其中通过使用
硫酸的烷基卤化物或单或双烷基酯酸酯对现场制备的含有酸敏感的酮保护基的N-酰化
氨基酸进行酯化。