Synthesis of <i>N</i>-(Hydroxy)amide- and <i>N</i>-(Hydroxy)thioamide-Containing Peptides
作者:Lu Wang、Phanstiel
DOI:10.1021/jo991589r
日期:2000.3.1
Methods developed with N-(benzoyloxy)amines and hydroxamic acids were used in the synthesis of N-(hydroxy)amide-containing pseudopeptides. Acylation of N-(benzoyloxy)phenethylamine with the acid chloride of N(alpha)-Fmoc-L-leucine provided a N(alpha)-Fmoc-N-(benzoyloxy)-L-leucinamide in 90% yield. Deprotection of the benzoyl group (using 10 vol % NH(4)OH/MeOH) provided the N(alpha)-Fmoc-N-(hydroxy)-L-leucinamide
由N-(苯甲酰氧基)胺和异羟肟酸开发的方法用于合成含N-(羟基)酰胺的假肽。用Nα-Fmoc-L-亮氨酸的酰氯酰化N-(苯甲酰氧基)苯乙胺,以90%的产率提供了Nα-Fmoc-N-(苯甲酰氧基)-L-亮氨酸酰胺。苯甲酰基的脱保护(使用10体积%的NH(4)OH / MeOH)以87%的收率提供了Nα-Fmoc-N-(羟基)-L-亮氨酸酰胺。通常,附加的Fmoc基团允许使用经典的肽偶联方法进一步修饰N-羟基-N-(烷基)酰胺。开发了一种实用的合成策略,并使用非对映体Val-Leu衍生物解决了外消旋化问题。另外,由相应的N-(苯甲酰氧基)硫代酰胺产生了N-(羟基)硫代酰胺。通过相应的N-(苯甲酰氧基)酰胺与Lawesson试剂(即2,4,4-双(4-甲氧基苯基)-1,3-)的反应以中等收率(53-76%)获得了N-(苯甲酰氧基)硫代酰胺。二硫代2,4-二磷杂环丁烷2,4-二硫醚)。总之,这项新