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学科主题: 物理有机化学
题名: Folding-Induced Folding: The Assembly of Aromatic Amide and 1,2,3-Triazole Hybrid Helices
其他题名: 折叠诱导折叠: 芳酰胺-1,2,3-三氮唑杂化螺旋结构组装
作者: Wu CF(吴春芳)1; Li ZM(李志明)1; Xu XN(徐晓娜)1; Zhao ZX(赵志雄)1; Zhao X(赵新)1; Wang RX(王任小)1; Li ZT(黎占亭)1
通讯作者: 赵新 ; 黎占亭
刊名: Chem.-Eur. J.
发表日期: 2014
DOI: 10.1002/chem.201304161
卷: 20, 期:5, 页:1418-1426
收录类别: SCI
英文摘要: Folding-induced folding for the construction of artificial hybrid helices from two different kinds of aromatic sequences is described. Linear compounds 1a, 1b, and 2, containing one aromatic amide trimer or pentamer and one or two aromatic 1,2,3-triazole tetramers, have been designed and synthesized. The trimeric and pentameric amide segments are driven by intramolecluar N-H center dot center dot center dot F hydrogen bonding to adopt a folded or helical conformation, whereas the triazole segment is intrinsically disordered. In organic solvents of low polarity, the amide foldamer segment induces the attached triazole segment(s) to fold through intramolecular stacking, leading to the formation of hybrid helices. The helical conformation of these hybrid sequences has been confirmed by H-1 and F-19 NMR spectroscopy, UV/Vis spectroscopy, circular dichroism (CD) experiments, and theoretical calculations. It was found that the amide pentamer exhibits a stronger ability to induce the folding of the attached triazole segment(s) compared with that of the shorter trimer. Enantiomers (R)-3 and (S)-3, which contain an R-or S-(1-naphthyl) ethylamino group at the end of a tetraamide segment, have also been synthesized. CD experiments showed that introduction of a chiral group caused the whole framework to produce a strong helicity bias. Density-functional-theory calculations on (S)-3 suggested that this compound exists as a right-handed (P) helix.
语种: 英语
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/39146
Appears in Collections:物理有机化学研究室_期刊论文

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作者单位: 1.中科院上海有机化学研究所
2.复旦大学

Recommended Citation:
Wu CF,Li ZM,Xu XN,et al. Folding-Induced Folding: The Assembly of Aromatic Amide and 1,2,3-Triazole Hybrid Helices[J]. Chem.-Eur. J.,2014,20(5):1418-1426.
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