Facile Synthesis of Reagents Containing a Terminal Maleimido Ligand Linked to an Active Ester
作者:Ole Nielsen、Ole Buchardt
DOI:10.1055/s-1991-26579
日期:——
Condensation of Ï-amino acids with maleic anhydride to yield maleamino acids and subsequent esterification with N-hydroxysuccinimide, 3,4-dihydro-3-hydroxy-4-oxo-1,2,3-benzotriazine, or pentafluorophenol to give the corresponding esters in a one pot procedure are described. The reagents can be isolated and purified without chromatography in 7-55% yields.
本研究描述了马来酸酐与Ï-氨基酸缩合生成马来氨基酸,然后与 N-羟基琥珀酰亚胺、3,4-二氢-3-羟基-4-氧代-1,2,3-苯并三嗪或五氟苯酚进行酯化反应,从而以一锅法生成相应的酯。这些试剂无需层析即可分离纯化,产率为 7-55%。