A methoxypyrrole amino acid (MOPAS) resembling the structure of H2N-Val-Î-Ala-OEt in β-sheet conformation has been prepared by a chiral auxiliary approach. The X-ray structure analysis confirms the absolute configuration of the dipeptide mimic. Standard peptide coupling procedures allow coupling of the chiral MOPAS with natural amino acids or their extension by additional MOPAS units. A tight self-association of bis-MOPAS 13 in CDCl3 and the affinity to Ac-Ala-Ile-OMe dipeptides illustrates the ability of the constrained dipeptide mimic MOPAS to interact with peptides.
一种类似于
H2N-Val-Δ-Ala-OEt结构的甲氧基
吡咯氨基酸(
MOPAS)已通过手性辅助法制备。X射线结构分析确认了该二
肽模拟物的绝对构型。标准的肽偶联程序允许将手性
MOPAS与天然
氨基酸偶联,或通过额外的
MOPAS单元进行扩展。bis-
MOPAS 13在CDCl3中的紧密自聚合以及与Ac-Ala-Ile-OMe二肽的亲和力,展示了受限的二
肽模拟物MOPAS与肽发生相互作用的能力。