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首页> 外文期刊>Crystal growth & design >Pseudopeptides Designed to Form Supramolecular Helixes: The Role of the Stereogenic Centers
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Pseudopeptides Designed to Form Supramolecular Helixes: The Role of the Stereogenic Centers

机译:设计形成超分子螺旋的伪肽:立体异构中心的作用。

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摘要

The two epimers Boc-L-Phe-D-Oxd-(S)-beta(3)-hPhg-OBn (1) and Boc-L-Phe-D-Oxd-(R)-beta(3)-hPhg-OBn (2) have been prepared by standard methods in solution, and their conformation was analyzed both in solution and in the solid state. While in solution 1 shows it random coil structure, 2 tends to assume a gamma-turn conformation that is nearly retained in the solid state. On the other hand, in the solid state molecules of 1 associate generating it helix that involves the formation of elongated crystals with hexagonal cross-section. This effect is not observed in the crystals formed by Boc-L-Phe-D-Oxd-(R)-beta(3)-hPhg-OBn 2.
机译:两个差向异构体Boc-L-Phe-D-Oxd-(S)-beta(3)-hPhg-OBn(1)和Boc-L-Phe-D-Oxd-(R)-beta(3)-hPhg- OBn(2)已通过标准方法在溶液中制备,并在溶液和固态下对其构象进行了分析。尽管在解决方案1中显示为随机线圈结构,但2趋向于呈现几乎保持固态的伽马线构象。另一方面,在固态的1缔合分子中产生螺旋,该螺旋涉及形成具有六边形横截面的细长晶体。在Boc-L-Phe-D-Oxd-(R)-beta(3)-hPhg-OBn 2形成的晶体中未观察到此效应。

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