In this work, an efficient microwave-assisted methodology for the esterification of unprotected α-amino acids is described. Ionic esterified amino acids were synthesized in satisfactory yields in a facile one-pot solventless protocol from unprotected amino acids and alcohols under acid catalysis (MsOH or p-TsOH) to afford the pure products after a simple work-up procedure. This procedure can also be extended to the preparation of long and short chain alkyl and benzyl esters.
本研究描述了一种高效的微波辅助方法来酯化未受保护的
α-氨基酸。在酸催化(MsOH 或 p-TsOH)条件下,以未保护的
氨基酸和醇为原料,通过简便的单锅无溶剂方案合成了离子酯化
氨基酸,产率令人满意。该方法还可用于制备长链和短链烷基酯和苄基酯。