Hydrazinopeptide Motifs Synthesized via the Ugi Reaction: An Insight into the Secondary Structure
作者:Mikhail Krasavin、Ekaterina Bushkova、Vladislav Parchinsky、Alexei Shumsky
DOI:10.1055/s-0029-1219274
日期:2010.3
‘silent partner’ and becomes removed upon basic workup of the reaction. These compounds have been efficiently modified further via reductive alkylation to produce N α,N α-dialkyl,N β-acylhydrazines. The two groups of novel hydrazinopeptide motifs have been shown by simple ¹H NMR spectroscopic experiments to display two different secondary structure patterns. These observations were confirmed by X-ray
许多Ñ α -烷基,Ñ β -acylhydrazines已经合成了通过的Ugi反应Ñ与异氰化物和三氟乙酸-acylhydrazones。三氟乙酸充当“沉默的伙伴”,并在反应的基本后处理时被除去。这些化合物已被有效地通过还原性烷基化进一步修饰以产生Ñ α,Ñ α二烷基,Ñ β -acylhydrazines。两组新颖的肼基肽基序已通过简单的“ ¹”显示1 H NMR光谱实验显示了两种不同的二级结构模式。这些观察结果通过X射线晶体学分析证实。在一个反应前体中结合and和羧酸基团提供了“分子内”肼基-Ugi反应的机会,这也得到了证明。 多组分反应-hydr-取代基效应-拟肽-二级结构