Synthesis of Constrained Peptidomimetics Containing 2-Oxo-1,3-oxazolidine-4-carboxylic Acids
作者:Luca Gentilucci、Alessandra Tolomelli、Rossella De Marco、Claudia Tomasini、Sören Feddersen
DOI:10.1002/ejoc.201100346
日期:2011.7.13
dehydration products, in agreement to previous studies. The protocol constitutes a valuable approach to the preparation of oxazolidinone-containing peptides, which are a recently emerging class of constrained peptidomimetics. As a representative example, an Oxd analogue of the endogenous opioid peptide endomorphin-1, characterized by an all-trans conformation, was readily prepared.
含有丝氨酸或苏氨酸残基的磺酰肽与双(琥珀酰亚胺)碳酸酯 (DSC) 和二异丙基乙胺 (DIPEA) 环化,得到带有 2-oxo-1,3-oxazolidine-4-carboxylate (Oxd) 基团的肽,无论是在溶液中或在固相。序列中丝氨酸或苏氨酸残基的位置相对不重要。在相同条件下,相应的 Fmoc-或 Boc-肽产生脱水产物,与之前的研究一致。该协议构成了一种制备含有恶唑烷酮的肽的有价值的方法,这些肽是最近出现的一类受限肽模拟物。作为一个代表性的例子,内源性阿片肽endomorphin-1的Oxd类似物很容易制备,其特征在于全反式构象。