A preparation of N-Fmoc-N-methyl-α-amino acids and N-nosyl-N-methyl-α-amino acids
作者:Maria Luisa Di Gioia、Antonella Leggio、Angelo Liguori、Francesca Perri、Carlo Siciliano、Maria Caterina Viscomi
DOI:10.1007/s00726-008-0221-8
日期:2010.1
for the synthesis of lipophilic N-Fmoc-N-methyl-α-amino acids and N-nosyl-N-methyl-α-amino acids, interesting building blocks to be used for the preparation of N-methylated peptides, is presented. Both nosyl- and Fmoc-protected monomers are accessible, so these compounds can be used in solution as well as in solid phase peptide synthesis. The methodology is based on the use of benzhydryl group to protect
亲脂性N -Fmoc- N-甲基-α-氨基酸和N-糖基-N-甲基-α-氨基酸(用于制备N-甲基化肽的有趣结构单元)的合成简便途径是提出了。Nosyl和Fmoc保护的单体都是可及的,因此这些化合物可用于溶液以及固相肽合成中。该方法是基于使用苯甲基来暂时保护N-糖基-α-氨基酸的羧基功能以及随后N的甲基化-重氮基的-nosyl-α-氨基酸二苯甲基酯。苯甲基酯具有几个有益的特征,例如制备简单,对甲基化的稳定性以及在温和条件下的选择性脱保护。整个过程非常有效,因为所采用的条件保持了氨基酸前体的手性完整性,并且该过程不需要对甲基化产物进行色谱纯化。