[reaction: see text] N-Methyl amino acid residues in peptides modify several pharmacologically useful parameters, but synthesis of alkylated peptides is hampered by unavailability of N-methylated monomers. The syntheses of four N-methyl amino acids with basic side chains are presented. The side chains of these basic amino acids needed to be specially protected or constructed. This completes the set
[反应:见正文]肽中的N-甲基
氨基酸残基修饰了几个药理上有用的参数,但由于N-甲基化单体的缺乏,烷基化肽的合成受到了阻碍。提出了具有碱性侧链的四个N-甲基
氨基酸的合成。这些碱性
氨基酸的侧链需要特别保护或构建。这完成了我们小组通过5-
恶唑烷酮中间体制备的20种常见L-
氨基酸N-甲基衍
生物的集合。